101
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Hanay SB, Fallah A, Senturk E, Yetim Z, Afghah F, Yilmaz H, Culha M, Koc B, Zarrabi A, Varma RS. Exploiting Urazole's Acidity for Fabrication of Hydrogels and Ion-Exchange Materials. Gels 2021; 7:261. [PMID: 34940320 PMCID: PMC8701905 DOI: 10.3390/gels7040261] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2021] [Revised: 12/01/2021] [Accepted: 12/07/2021] [Indexed: 11/30/2022] Open
Abstract
In this study, the acidity of urazole (pKa 5-6) was exploited to fabricate a hydrogel in two simple and scalable steps. Commercially available poly(hexamethylene)diisocyanate was used as a precursor to synthesize an urazole containing gel. The formation of urazole was confirmed by FT-IR and 1H-NMR spectroscopy. The hydrogel was characterized by microscopy imaging as well as spectroscopic and thermo-gravimetric analyses. Mechanical analysis and cell viability tests were performed for its initial biocompatibility evaluation. The prepared hydrogel is a highly porous hydrogel with a Young's modulus of 0.91 MPa, has a swelling ratio of 87%, and is capable of exchanging ions in a medium. Finally, a general strategy was demonstrated to embed urazole groups directly into a crosslinked material.
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Affiliation(s)
- Saltuk B. Hanay
- Faculty of Engineering and Natural Sciences (FENS), Sabanci University, Istanbul 34956, Turkey; (A.F.); (E.S.); (F.A.); (B.K.)
- Sabancı University Nanotechnology Research and Application Center—SUNUM, Istanbul 34956, Turkey; (H.Y.); (M.C.)
- Hanay Advanced Chemicals Inc., Hanay Ileri Kimya Arastirma Gelistirme ve Muhendislik AS, Istanbul 34413, Turkey
| | - Ali Fallah
- Faculty of Engineering and Natural Sciences (FENS), Sabanci University, Istanbul 34956, Turkey; (A.F.); (E.S.); (F.A.); (B.K.)
- Sabancı University Nanotechnology Research and Application Center—SUNUM, Istanbul 34956, Turkey; (H.Y.); (M.C.)
- Integrated Manufacturing Technologies Research and Application Center, Sabanci University, Istanbul 34956, Turkey
| | - Efsun Senturk
- Faculty of Engineering and Natural Sciences (FENS), Sabanci University, Istanbul 34956, Turkey; (A.F.); (E.S.); (F.A.); (B.K.)
- Hanay Advanced Chemicals Inc., Hanay Ileri Kimya Arastirma Gelistirme ve Muhendislik AS, Istanbul 34413, Turkey
| | - Zeliha Yetim
- Department of Histology and Embryology, Faculty of Medicine, Ataturk University, Erzurum 25240, Turkey;
| | - Ferdows Afghah
- Faculty of Engineering and Natural Sciences (FENS), Sabanci University, Istanbul 34956, Turkey; (A.F.); (E.S.); (F.A.); (B.K.)
| | - Hulya Yilmaz
- Sabancı University Nanotechnology Research and Application Center—SUNUM, Istanbul 34956, Turkey; (H.Y.); (M.C.)
| | - Mustafa Culha
- Sabancı University Nanotechnology Research and Application Center—SUNUM, Istanbul 34956, Turkey; (H.Y.); (M.C.)
- Department of Internal Medicine and Ophthalmology, Morsani College of Medicine, The University of South Florida, Tampa, FL 33620, USA
| | - Bahattin Koc
- Faculty of Engineering and Natural Sciences (FENS), Sabanci University, Istanbul 34956, Turkey; (A.F.); (E.S.); (F.A.); (B.K.)
- Sabancı University Nanotechnology Research and Application Center—SUNUM, Istanbul 34956, Turkey; (H.Y.); (M.C.)
- Integrated Manufacturing Technologies Research and Application Center, Sabanci University, Istanbul 34956, Turkey
| | - Ali Zarrabi
- Department of Biomedical Engineering, Faculty of Engineering and Natural Sciences, Istinye University, Istanbul 34396, Turkey;
| | - Rajender S. Varma
- Regional Centre of Advanced Technologies and Materials, Czech Advanced Technology and Research Institute, Palacký University in Olomouc, 78371 Olomouc, Czech Republic
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102
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Tosoratti E, Fisch P, Taylor S, Laurent‐Applegate LA, Zenobi‐Wong M. 3D-Printed Reinforcement Scaffolds with Targeted Biodegradation Properties for the Tissue Engineering of Articular Cartilage. Adv Healthc Mater 2021; 10:e2101094. [PMID: 34633151 DOI: 10.1002/adhm.202101094] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2021] [Revised: 09/20/2021] [Indexed: 01/03/2023]
Abstract
Achieving regeneration of articular cartilage is challenging due to the low healing capacity of the tissue. Appropriate selection of cell source, hydrogel, and scaffold materials are critical to obtain good integration and long-term stability of implants in native tissues. Specifically, biomechanical stability and in vivo integration can be improved if the rate of degradation of the scaffold material matches the stiffening of the sample by extracellular matrix secretion of the encapsulated cells. To this end, a novel 3D-printed lactide copolymer is presented as a reinforcement scaffold for an enzymatically crosslinked hyaluronic acid hydrogel. In this system, the biodegradable properties of the reinforced scaffold are matched to the matrix deposition of articular chondrocytes embedded in the hydrogel. The lactide reinforcement provides stability to the soft hydrogel in the early stages, allowing the composite to be directly implanted in vivo with no need for a preculture period. Compared to pure cellular hydrogels, maturation and matrix secretion remain unaffected by the reinforced scaffold. Furthermore, excellent biocompatibility and production of glycosaminoglycans and collagens are observed at all timepoints. Finally, in vivo subcutaneous implantation in nude mice shows cartilage-like tissue maturation, indicating the possibility for the use of these composite materials in one-step surgical procedures.
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Affiliation(s)
- Enrico Tosoratti
- Institute for Biomechanics Otto‐Stern‐Weg 7, ETH Zürich Zürich CH‐8093 Switzerland
| | - Philipp Fisch
- Institute for Biomechanics Otto‐Stern‐Weg 7, ETH Zürich Zürich CH‐8093 Switzerland
| | - Scott Taylor
- Poly‐Med Inc 51 Technology Drive Anderson SC 29625 USA
| | - Lee Ann Laurent‐Applegate
- Regenerative Therapy Unit Lausanne University Hospital University of Lausanne Épalinges CH‐1066 Switzerland
- Center for Applied Biotechnology and Molecular Medicine University of Zürich Zürich CH‐8057 Switzerland
| | - Marcy Zenobi‐Wong
- Institute for Biomechanics Otto‐Stern‐Weg 7, ETH Zürich Zürich CH‐8093 Switzerland
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103
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Qin D, Wang N, You XG, Zhang AD, Chen XG, Liu Y. Collagen-based biocomposites inspired by bone hierarchical structures for advanced bone regeneration: ongoing research and perspectives. Biomater Sci 2021; 10:318-353. [PMID: 34783809 DOI: 10.1039/d1bm01294k] [Citation(s) in RCA: 24] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Bone is a hard-connective tissue composed of matrix, cells and bioactive factors with a hierarchical structure, where the matrix is mainly composed of type I collagen and hydroxyapatite. Collagen fibers assembled by collagen are the template for mineralization and make an important contribution to bone formation and the bone remodeling process. Therefore, collagen has been widely clinically used for bone/cartilage defect regeneration. However, pure collagen implants, such as collagen scaffolds or sponges, have limitations in the bone/cartilage regeneration process due to their poor mechanical properties and osteoinductivity. Different forms of collagen-based composites prepared by incorporating natural/artificial polymers or bioactive inorganic substances are characterized by their interconnected porous structure and promoting cell adhesion, while they improve the mechanical strength, structural stability and osteogenic activities of the collagen matrix. In this review, various forms of collagen-based biocomposites, such as scaffolds, sponges, microspheres/nanoparticles, films and microfibers/nanofibers prepared by natural/synthetic polymers, bioactive ceramics and carbon-based materials compounded with collagen are reviewed. In addition, the application of collagen-based biocomposites as cytokine, cell or drug (genes, proteins, peptides and chemosynthetic) delivery platforms for proangiogenesis and bone/cartilage tissue regeneration is also discussed. Finally, the potential application, research and development direction of collagen-based biocomposites in future bone/cartilage tissue regeneration are discussed.
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Affiliation(s)
- Di Qin
- College of Marine Life Science, Ocean University of China, Qingdao, 266003, P.R. China.
| | - Na Wang
- College of Marine Life Science, Ocean University of China, Qingdao, 266003, P.R. China.
| | - Xin-Guo You
- College of Marine Life Science, Ocean University of China, Qingdao, 266003, P.R. China.
| | - An-Di Zhang
- College of Marine Life Science, Ocean University of China, Qingdao, 266003, P.R. China.
| | - Xi-Guang Chen
- College of Marine Life Science, Ocean University of China, Qingdao, 266003, P.R. China.
| | - Ya Liu
- College of Marine Life Science, Ocean University of China, Qingdao, 266003, P.R. China.
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104
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Bone Regeneration Using MMP-Cleavable Peptides-Based Hydrogels. Gels 2021; 7:gels7040199. [PMID: 34842679 PMCID: PMC8628702 DOI: 10.3390/gels7040199] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2021] [Revised: 10/27/2021] [Accepted: 11/03/2021] [Indexed: 12/16/2022] Open
Abstract
Accumulating evidence has suggested the significant potential of chemically modified hydrogels in bone regeneration. Despite the progress of bioactive hydrogels with different materials, structures and loading cargoes, the desires from clinical applications have not been fully validated. Multiple biological behaviors are orchestrated precisely during the bone regeneration process, including bone marrow mesenchymal stem cells (BMSCs) recruitment, osteogenic differentiation, matrix calcification and well-organized remodeling. Since matrix metalloproteinases play critical roles in such bone metabolism processes as BMSC commitment, osteoblast survival, osteoclast activation matrix calcification and microstructure remodeling, matrix metalloproteinase (MMP) cleavable peptides-based hydrogels could respond to various MMP levels and, thus, accelerate bone regeneration. In this review, we focused on the MMP-cleavable peptides, polymers, functional modification and crosslinked reactions. Applications, perspectives and limitations of MMP-cleavable peptides-based hydrogels for bone regeneration were then discussed.
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105
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DNA mediated graphene oxide (GO)-nanosheets dispersed supramolecular GO-DNA hydrogel: An efficient soft-milieu for simplistic synthesis of Ag-NPs@GO-DNA and Gram + ve/-ve bacteria-based Ag-NPs@GO-DNA-bacteria nano-bio composites. J Mol Liq 2021. [DOI: 10.1016/j.molliq.2021.117482] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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106
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Zhou Y, Fan Y, Chen Z, Yue Z, Wallace G. Catechol functionalized ink system and thrombin-free fibrin gel for fabricating cellular constructs with mechanical support and inner micro channels. Biofabrication 2021; 14. [PMID: 34638119 DOI: 10.1088/1758-5090/ac2ef8] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2021] [Accepted: 10/12/2021] [Indexed: 12/17/2022]
Abstract
The development of 3D bio printing technology has contributed to protocols for the repair and regeneration of tissues in recent years. However, it is still a great challenge to fabricate structures that mimic the complexity of native tissue, including both the biomechanics and microscale internal structure. In this study, a catechol functionalized ink system was developed to produce tough and elastic scaffolds with built-in micro channels that simulate the vascular structure. And a skin model was designed to evaluate the cytocompatibility of the scaffolds. The mechanical support stemmed from the double network based on catechol-hyaluronic acid (HACA) and alginate, the micro channels were generated using sacrificial gelatin. HACA/alginate and gelatin were firstly printed using a 3D extrusion printer. Thrombin-free fibrinogen were then mixed with human dermal fibroblasts and introduced to the printed scaffolds to induce gelation. An immortal human keratinocyte cell line was introduced on top of the cellular construct to mimic the full thickness skin structure. The printed scaffolds demonstrated high elasticity and supported the formation of a double-layered cell-laden skin like structure. The results suggest the 3D printing platform developed here provides a platform for skin regeneration and could be explored further to engineer functional skin tissue by incorporation of other types of cells.
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Affiliation(s)
- Ying Zhou
- ARC Centre of Excellence for Electromaterials Science, Intelligent Polymer Research Institute, Innovation Campus, University of Wollongong, Wollongong, NSW, 2522, Australia
| | - Yuchao Fan
- ARC Centre of Excellence for Electromaterials Science, Intelligent Polymer Research Institute, Innovation Campus, University of Wollongong, Wollongong, NSW, 2522, Australia
| | - Zhi Chen
- ARC Centre of Excellence for Electromaterials Science, Intelligent Polymer Research Institute, Innovation Campus, University of Wollongong, Wollongong, NSW, 2522, Australia
| | - Zhilian Yue
- ARC Centre of Excellence for Electromaterials Science, Intelligent Polymer Research Institute, Innovation Campus, University of Wollongong, Wollongong, NSW, 2522, Australia
| | - Gordon Wallace
- ARC Centre of Excellence for Electromaterials Science, Intelligent Polymer Research Institute, Innovation Campus, University of Wollongong, Wollongong, NSW, 2522, Australia
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107
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Lehnert S, Sikorski P. Application of Temporary, Cell-Containing Alginate Microcarriers to Facilitate the Fabrication of Spatially Defined Cell Pockets in 3D Collagen Hydrogels. Macromol Biosci 2021; 22:e2100319. [PMID: 34679232 DOI: 10.1002/mabi.202100319] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2021] [Revised: 09/29/2021] [Indexed: 11/08/2022]
Abstract
Mimicking the complexity of natural tissue is a major challenge in the field of tissue engineering. Here, a facile 2-step fabrication method to prepare 3D constructs with distinct regions of high cell concentrations and without the need for elaborate equipment is proposed. The initial incorporation of cells in a sacrificial alginate matrix allows the addition of other, cell relevant biopolymers, such as, collagen to form a spatially confined, interpenetrating network at the microscale. A layered structure at the macroscale can be achieved by incorporating these cell-containing microspheres in thin collagen layers. Cells are locally released by de-gelling the alginate matrix and their attachment to the collagen hydrogel layers has been studied. The use of the murine pre-osteoblast cell line MC3T3-E1 as an example cell line shows that the cells behave differently in their cell migration pattern based on the initial composition of the alginate microspheres.
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Affiliation(s)
- Sarah Lehnert
- Department of Physics, Norwegian University of Science and Technology (NTNU), Høgskoleringen 5, Trondheim, 7034, Norway
| | - Pawel Sikorski
- Department of Physics, Norwegian University of Science and Technology (NTNU), Høgskoleringen 5, Trondheim, 7034, Norway
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108
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Cheah CW, Al-Namnam NM, Lau MN, Lim GS, Raman R, Fairbairn P, Ngeow WC. Synthetic Material for Bone, Periodontal, and Dental Tissue Regeneration: Where Are We Now, and Where Are We Heading Next? MATERIALS 2021; 14:ma14206123. [PMID: 34683712 PMCID: PMC8537464 DOI: 10.3390/ma14206123] [Citation(s) in RCA: 43] [Impact Index Per Article: 14.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/25/2021] [Revised: 09/28/2021] [Accepted: 10/11/2021] [Indexed: 01/21/2023]
Abstract
Alloplasts are synthetic, inorganic, biocompatible bone substitutes that function as defect fillers to repair skeletal defects. The acceptance of these substitutes by host tissues is determined by the pore diameter and the porosity and inter-connectivity. This narrative review appraises recent developments, characterization, and biological performance of different synthetic materials for bone, periodontal, and dental tissue regeneration. They include calcium phosphate cements and their variants β-tricalcium phosphate (β-TCP) ceramics and biphasic calcium phosphates (hydroxyapatite (HA) and β-TCP ceramics), calcium sulfate, bioactive glasses and polymer-based bone substitutes which include variants of polycaprolactone. In summary, the search for synthetic bone substitutes remains elusive with calcium compounds providing the best synthetic substitute. The combination of calcium sulphate and β-TCP provides improved handling of the materials, dispensing with the need for a traditional membrane in guided bone regeneration. Evidence is supportive of improved angiogenesis at the recipient sites. One such product, (EthOss® Regeneration, Silesden, UK) has won numerous awards internationally as a commercial success. Bioglasses and polymers, which have been used as medical devices, are still in the experimental stage for dental application. Polycaprolactone-TCP, one of the products in this category is currently undergoing further randomized clinical trials as a 3D socket preservation filler. These aforementioned products may have vast potential for substituting human/animal-based bone grafts.
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Affiliation(s)
- Chia Wei Cheah
- Faculty of Dentistry, University of Malaya, Kuala Lumpur 50603, Malaysia; (C.W.C.); (M.N.L.); (G.S.L.)
| | - Nisreen Mohammed Al-Namnam
- School of Dental Sciences, Faculty of Medical Sciences, Newcastle University, Framlington Place, Newcastle upon Tyne NE2 4BW, UK;
| | - May Nak Lau
- Faculty of Dentistry, University of Malaya, Kuala Lumpur 50603, Malaysia; (C.W.C.); (M.N.L.); (G.S.L.)
| | - Ghee Seong Lim
- Faculty of Dentistry, University of Malaya, Kuala Lumpur 50603, Malaysia; (C.W.C.); (M.N.L.); (G.S.L.)
| | - Renukanth Raman
- Oral Health Division, Ministry of Health Malaysia, Putrajaya 62590, Malaysia;
| | - Peter Fairbairn
- Department of Periodontology and Implant Dentistry, School of Dentistry, University of Detroit Mercy, 2700 Martin Luther King, Jr. Boulevard, Detroit, MI 48208, USA;
| | - Wei Cheong Ngeow
- Faculty of Dentistry, University of Malaya, Kuala Lumpur 50603, Malaysia; (C.W.C.); (M.N.L.); (G.S.L.)
- Correspondence: ; Tel.: +60-3-79674962; Fax: +60-3-79674534
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109
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Samojlik MM, Stabler CL. Designing biomaterials for the modulation of allogeneic and autoimmune responses to cellular implants in Type 1 Diabetes. Acta Biomater 2021; 133:87-101. [PMID: 34102338 PMCID: PMC9148663 DOI: 10.1016/j.actbio.2021.05.039] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2021] [Revised: 05/05/2021] [Accepted: 05/20/2021] [Indexed: 12/15/2022]
Abstract
The effective suppression of adaptive immune responses is essential for the success of allogeneic cell therapies. In islet transplantation for Type 1 Diabetes, pre-existing autoimmunity provides an additional hurdle, as memory autoimmune T cells mediate both an autoantigen-specific attack on the donor beta cells and an alloantigen-specific attack on the donor graft cells. Immunosuppressive agents used for islet transplantation are generally successful in suppressing alloimmune responses, but dramatically hinder the widespread adoption of this therapeutic approach and fail to control memory T cell populations, which leaves the graft vulnerable to destruction. In this review, we highlight the capacity of biomaterials to provide local and nuanced instruction to suppress or alter immune pathways activated in response to an allogeneic islet transplant. Biomaterial immunoisolation is a common approach employed to block direct antigen recognition and downstream cell-mediated graft destruction; however, immunoisolation alone still permits shed donor antigens to escape into the host environment, resulting in indirect antigen recognition, immune cell activation, and the creation of a toxic graft site. Designing materials to decrease antigen escape, improve cell viability, and increase material compatibility are all approaches that can decrease the local release of antigen and danger signals into the implant microenvironment. Implant materials can be further enhanced through the local delivery of anti-inflammatory, suppressive, chemotactic, and/or tolerogenic agents, which serve to control both the innate and adaptive immune responses to the implant with a benefit of reduced systemic effects. Lessons learned from understanding how to manipulate allogeneic and autogenic immune responses to pancreatic islets can also be applied to other cell therapies to improve their efficacy and duration. STATEMENT OF SIGNIFICANCE: This review explores key immunologic concepts and critical pathways mediating graft rejection in Type 1 Diabetes, which can instruct the future purposeful design of immunomodulatory biomaterials for cell therapy. A summary of immunological pathways initiated following cellular implantation, as well as current systemic immunomodulatory agents used, is provided. We then outline the potential of biomaterials to modulate these responses. The capacity of polymeric encapsulation to block some powerful rejection pathways is covered. We also highlight the role of cellular health and biocompatibility in mitigating immune responses. Finally, we review the use of bioactive materials to proactively modulate local immune responses, focusing on key concepts of anti-inflammatory, suppressive, and tolerogenic agents.
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Affiliation(s)
- Magdalena M Samojlik
- J. Crayton Pruitt Family Department of Biomedical Engineering, University of Florida, Gainesville, FL, USA
| | - Cherie L Stabler
- J. Crayton Pruitt Family Department of Biomedical Engineering, University of Florida, Gainesville, FL, USA; University of Florida Diabetes Institute, Gainesville, FL, USA; Graduate Program in Biomedical Sciences, College of Medicine, University of Florida, Gainesville, FL, USA.
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110
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Evaluation of Microfluidic Approaches to Encapsulate Cells into PEGDA Microparticles. REGENERATIVE ENGINEERING AND TRANSLATIONAL MEDICINE 2021. [DOI: 10.1007/s40883-021-00232-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Abstract
Abstract
Purpose
Polyethylene glycol diacrylate (PEGDA) is increasingly used to microencapsulate cells via a vortex-induced water-in-oil emulsion process. Herein, we evaluated methods to encapsulate cells into microparticles using microfluidic methods.
Methods
PEGDA prepolymer solution with or without cells was photopolymerized with white light under varying microfluidic parameters to form empty microspheres or cell-laden microparticles. Microparticles and entrapped cells were assessed for size and viability.
Results
PEGDA microparticles were easily formed when cells were absent; the introduction of cells resulted in aggregation that clogged microfluidic devices, resulting in a mix of empty polymer microparticles and cells that were not encapsulated. Cells that were successfully encapsulated had poor viability.
Conclusion
Microfluidic methods may work for low density microencapsulation of mammalian cells; however, when the cell density within each microparticle must be relatively high, emulsion-based methods are superior to microfluidic methods.
Lay Summary
The synthetic polymer polyethylene glycol diacrylate (PEGDA) has been increasingly used to encapsulate cells into micrometer-sized hydrogel spheres (microspheres). One method to microencapsulate cells has been to form a water-in-oil emulsion with liquid polymer containing cells and then expose the suspended droplets to white light, polymerizing them into PEGDA hydrogel microspheres. Although successful, this method has poor control over the process, resulting in polydisperse microsphere sizes with varying cell density. We evaluated microfluidic methods to form both empty and cell-laden PEGDA microspheres. Although microfluidic methods resulted in monodisperse microsphere sizes, the introduction of cells resulted in clogging of microfluidic devices, non-spherical microparticles, and poor cell viability.
Future Work
Because the microfluidic approach successfully formed cell-free microspheres, the effect of reducing cell aggregation will be examined. Specifically, the use of anti-aggregation agents as well as a reduced cell density in the liquid polymer phase and their effects on polymer formation will be explored.
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111
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Vernerey FJ, Lalitha Sridhar S, Muralidharan A, Bryant SJ. Mechanics of 3D Cell-Hydrogel Interactions: Experiments, Models, and Mechanisms. Chem Rev 2021; 121:11085-11148. [PMID: 34473466 DOI: 10.1021/acs.chemrev.1c00046] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Hydrogels are highly water-swollen molecular networks that are ideal platforms to create tissue mimetics owing to their vast and tunable properties. As such, hydrogels are promising cell-delivery vehicles for applications in tissue engineering and have also emerged as an important base for ex vivo models to study healthy and pathophysiological events in a carefully controlled three-dimensional environment. Cells are readily encapsulated in hydrogels resulting in a plethora of biochemical and mechanical communication mechanisms, which recapitulates the natural cell and extracellular matrix interaction in tissues. These interactions are complex, with multiple events that are invariably coupled and spanning multiple length and time scales. To study and identify the underlying mechanisms involved, an integrated experimental and computational approach is ideally needed. This review discusses the state of our knowledge on cell-hydrogel interactions, with a focus on mechanics and transport, and in this context, highlights recent advancements in experiments, mathematical and computational modeling. The review begins with a background on the thermodynamics and physics fundamentals that govern hydrogel mechanics and transport. The review focuses on two main classes of hydrogels, described as semiflexible polymer networks that represent physically cross-linked fibrous hydrogels and flexible polymer networks representing the chemically cross-linked synthetic and natural hydrogels. In this review, we highlight five main cell-hydrogel interactions that involve key cellular functions related to communication, mechanosensing, migration, growth, and tissue deposition and elaboration. For each of these cellular functions, recent experiments and the most up to date modeling strategies are discussed and then followed by a summary of how to tune hydrogel properties to achieve a desired functional cellular outcome. We conclude with a summary linking these advancements and make the case for the need to integrate experiments and modeling to advance our fundamental understanding of cell-matrix interactions that will ultimately help identify new therapeutic approaches and enable successful tissue engineering.
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Affiliation(s)
- Franck J Vernerey
- Department of Mechanical Engineering, University of Colorado at Boulder, 1111 Engineering Drive, Boulder, Colorado 80309-0428, United States.,Materials Science and Engineering Program, University of Colorado at Boulder, 4001 Discovery Drive, Boulder, Colorado 80309-613, United States
| | - Shankar Lalitha Sridhar
- Department of Mechanical Engineering, University of Colorado at Boulder, 1111 Engineering Drive, Boulder, Colorado 80309-0428, United States
| | - Archish Muralidharan
- Materials Science and Engineering Program, University of Colorado at Boulder, 4001 Discovery Drive, Boulder, Colorado 80309-613, United States
| | - Stephanie J Bryant
- Materials Science and Engineering Program, University of Colorado at Boulder, 4001 Discovery Drive, Boulder, Colorado 80309-613, United States.,Department of Chemical and Biological Engineering, University of Colorado at Boulder, 3415 Colorado Avenue, Boulder, Colorado 80309-0596, United States.,BioFrontiers Institute, University of Colorado at Boulder, 3415 Colorado Avenue, Boulder, Colorado 80309-0596, United States
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112
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Schoonraad SA, Fischenich KM, Eckstein KN, Crespo-Cuevas V, Savard LM, Muralidharan A, Tomaschke AA, Uzcategui AC, Randolph MA, McLeod RR, Ferguson VL, Bryant SJ. Biomimetic and mechanically supportive 3D printed scaffolds for cartilage and osteochondral tissue engineering using photopolymers and digital light processing. Biofabrication 2021; 13. [PMID: 34479218 DOI: 10.1088/1758-5090/ac23ab] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2021] [Accepted: 09/03/2021] [Indexed: 02/08/2023]
Abstract
Successful 3D scaffold designs for musculoskeletal tissue engineering necessitate full consideration of the form and function of the tissues of interest. When designing structures for engineering cartilage and osteochondral tissues, one must reconcile the need to develop a mechanically robust system that maintains the health of cells embedded in the scaffold. In this work, we present an approach that decouples the mechanical and biochemical needs and allows for the independent development of the structural and cellular niches in a scaffold. Using the highly tuned capabilities of digital light processing-based stereolithography, structures with complex architectures are achieved over a range of effective porosities and moduli. The 3D printed structure is infilled with mesenchymal stem cells and soft biomimetic hydrogels, which are specifically formulated with extracellular matrix analogs and tethered growth factors to provide selected biochemical cues for the guided differentiation towards chondrogenesis and osteogenesis. We demonstrate the ability to utilize these structures to (a) infill a focal chondral defect and mitigate macroscopic and cellular level changes in the cartilage surrounding the defect, and (b) support the development of a stratified multi-tissue scaffold for osteochondral tissue engineering.
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Affiliation(s)
- Sarah A Schoonraad
- Materials Science and Engineering Program, University of Colorado at Boulder, Boulder, CO 80309, United States of America
| | - Kristine M Fischenich
- Department of Mechanical Engineering, University of Colorado at Boulder, Boulder, CO 80309, United States of America
| | - Kevin N Eckstein
- Department of Mechanical Engineering, University of Colorado at Boulder, Boulder, CO 80309, United States of America
| | - Victor Crespo-Cuevas
- Department of Mechanical Engineering, University of Colorado at Boulder, Boulder, CO 80309, United States of America
| | - Lea M Savard
- Department of Mechanical Engineering, University of Colorado at Boulder, Boulder, CO 80309, United States of America
| | - Archish Muralidharan
- Materials Science and Engineering Program, University of Colorado at Boulder, Boulder, CO 80309, United States of America
| | - Andrew A Tomaschke
- Department of Mechanical Engineering, University of Colorado at Boulder, Boulder, CO 80309, United States of America
| | - Asais Camila Uzcategui
- Materials Science and Engineering Program, University of Colorado at Boulder, Boulder, CO 80309, United States of America
| | - Mark A Randolph
- Department of Orthopaedic Surgery, Laboratory for Musculoskeletal Tissue Engineering, Massachusetts General Hospital, Harvard Medical School, Boston, MA 02114, United States of America
| | - Robert R McLeod
- Materials Science and Engineering Program, University of Colorado at Boulder, Boulder, CO 80309, United States of America.,Department of Electrical, Computer and Energy Engineering, University of Colorado at Boulder, Boulder, CO 80309, United States of America
| | - Virginia L Ferguson
- Materials Science and Engineering Program, University of Colorado at Boulder, Boulder, CO 80309, United States of America.,Department of Mechanical Engineering, University of Colorado at Boulder, Boulder, CO 80309, United States of America.,BioFrontiers Institute, University of Colorado at Boulder, Boulder, CO 80309, United States of America
| | - Stephanie J Bryant
- Materials Science and Engineering Program, University of Colorado at Boulder, Boulder, CO 80309, United States of America.,BioFrontiers Institute, University of Colorado at Boulder, Boulder, CO 80309, United States of America.,Department of Chemical and Biological Engineering, University of Colorado at Boulder, Boulder, CO 80309, United States of America
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113
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Alcala-Orozco CR, Cui X, Hooper GJ, Lim KS, Woodfield TB. Converging functionality: Strategies for 3D hybrid-construct biofabrication and the role of composite biomaterials for skeletal regeneration. Acta Biomater 2021; 132:188-216. [PMID: 33713862 DOI: 10.1016/j.actbio.2021.03.008] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2020] [Revised: 02/02/2021] [Accepted: 03/02/2021] [Indexed: 12/13/2022]
Abstract
The evolution of additive manufacturing (AM) technologies, biomaterial development and our increasing understanding of cell biology has created enormous potential for the development of personalized regenerative therapies. In the context of skeletal tissue engineering, physical and biological demands play key roles towards successful construct implantation and the achievement of bone, cartilage and blood vessel tissue formation. Nevertheless, meeting such physical and biological demands to mimic the complexity of human tissues and their functionality is still a significant ongoing challenge. Recent studies have demonstrated that combination of AM technologies and advanced biomaterials has great potential towards skeletal tissue engineering. This review aims to analyze how the most prominent technologies and discoveries in the field converge towards the development of advanced constructs for skeletal regeneration. Particular attention is placed on hybrid biofabrication strategies, combining bioinks for cell delivery with biomaterial inks providing physical support. Hybrid biofabrication has been the focus of recent emerging strategies, however there has been limited review and analysis of these techniques and the challenges involved. Furthermore, we have identified that there are multiple hybrid fabrication strategies, here we present a category system where each strategy is reviewed highlighting their distinct advantages, challenges and potential applications. In addition, bioinks and biomaterial inks are the main components of the hybrid biofabrication strategies, where it is recognized that such platforms still lack optimal physical and biological functionality. Thus, this review also explores the development of composite materials specifically targeting the enhancement of physical and biological functionality towards improved skeletal tissue engineering. STATEMENT OF SIGNIFICANCE: Biofabrication strategies capable of recreating the complexity of native tissues could open new clinical possibilities towards patient-specific regenerative therapies and disease models. Several reviews target the existing additive manufacturing (AM) technologies that may be utilised for biomedical purposes. However, this work presents a unique perspective, describing how such AM technologies have been recently translated towards hybrid fabrication strategies, targeting the fabrication of constructs with converging physical and biological properties. Furthermore, we address composite bioinks and biomaterial inks that have been engineered to overcome traditional limitations, and might be applied to the hybrid fabrication strategies outlined. This work offers ample perspectives and insights into the current and future challenges for the fabrication of skeletal tissues aiming towards clinical and biomedical applications.
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114
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Additive Manufacturing of Biopolymers for Tissue Engineering and Regenerative Medicine: An Overview, Potential Applications, Advancements, and Trends. INT J POLYM SCI 2021. [DOI: 10.1155/2021/4907027] [Citation(s) in RCA: 39] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023] Open
Abstract
As a technique of producing fabric engineering scaffolds, three-dimensional (3D) printing has tremendous possibilities. 3D printing applications are restricted to a wide range of biomaterials in the field of regenerative medicine and tissue engineering. Due to their biocompatibility, bioactiveness, and biodegradability, biopolymers such as collagen, alginate, silk fibroin, chitosan, alginate, cellulose, and starch are used in a variety of fields, including the food, biomedical, regeneration, agriculture, packaging, and pharmaceutical industries. The benefits of producing 3D-printed scaffolds are many, including the capacity to produce complicated geometries, porosity, and multicell coculture and to take growth factors into account. In particular, the additional production of biopolymers offers new options to produce 3D structures and materials with specialised patterns and properties. In the realm of tissue engineering and regenerative medicine (TERM), important progress has been accomplished; now, several state-of-the-art techniques are used to produce porous scaffolds for organ or tissue regeneration to be suited for tissue technology. Natural biopolymeric materials are often better suited for designing and manufacturing healing equipment than temporary implants and tissue regeneration materials owing to its appropriate properties and biocompatibility. The review focuses on the additive manufacturing of biopolymers with significant changes, advancements, trends, and developments in regenerative medicine and tissue engineering with potential applications.
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115
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Reakasame S, Dranseikiene D, Schrüfer S, Zheng K, Schubert DW, Boccaccini AR. Development of alginate dialdehyde-gelatin based bioink with methylcellulose for improving printability. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2021; 128:112336. [PMID: 34474887 DOI: 10.1016/j.msec.2021.112336] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/28/2021] [Revised: 06/23/2021] [Accepted: 07/23/2021] [Indexed: 11/26/2022]
Abstract
This study used methylcellulose (MC) to improve the printability of the alginate dialdehyde-gelatin (ADA-GEL) based bioink. The printability as well as the capability to maintain shape fidelity of ADA-GEL could be enhanced by the addition of 9% (w/v) MC. Moreover, the properties of the ink crosslinked with Ca2+ and Ba2+ were investigated. The samples crosslinked with Ba2+ were more stable and stiffer than the Ca2+ crosslinked samples. However, both Ca2+ and Ba2+ crosslinked samples exhibited a similar trend of MC release during incubation under cell culture conditions. The toxicity test indicated that both samples (crosslinked with Ca2+ and Ba2+) exhibited no toxic potential. The fabrication of cell-laden constructs using the developed bioinks was evaluated. The viability of ST2 cells in Ba2+ crosslinked samples increased while for Ca2+ crosslinked samples, a decreased viability was observed over the incubation time. After 21 days, cell spreading in the hydrogels crosslinked with Ba2+ occurred. However, a certain degree of cell damage was observed after incorporating the cells in the high viscosity bioink.
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Affiliation(s)
- Supachai Reakasame
- Institute of Biomaterials, University of Erlangen-Nuremberg, Cauerstr.6, 91058 Erlangen, Germany
| | - Dalia Dranseikiene
- Institute of Biomaterials, University of Erlangen-Nuremberg, Cauerstr.6, 91058 Erlangen, Germany
| | - Stefan Schrüfer
- Institute of Polymer Materials, University of Erlangen-Nuremberg, Martensstr.7, 91058 Erlangen, Germany
| | - Kai Zheng
- Institute of Biomaterials, University of Erlangen-Nuremberg, Cauerstr.6, 91058 Erlangen, Germany
| | - Dirk W Schubert
- Institute of Polymer Materials, University of Erlangen-Nuremberg, Martensstr.7, 91058 Erlangen, Germany
| | - Aldo R Boccaccini
- Institute of Biomaterials, University of Erlangen-Nuremberg, Cauerstr.6, 91058 Erlangen, Germany.
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116
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Sharma S, Monteleone N, Kopyeva I, Bryant SJ. The effects of processing variables on electrospun poly(ethylene glycol) fibrous hydrogels formed from the
thiol‐norbornene
click reaction. J Appl Polym Sci 2021. [DOI: 10.1002/app.50786] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Affiliation(s)
- Sadhana Sharma
- Department of Chemical and Biological Engineering University of Colorado‐Boulder Boulder Colorado USA
| | - Nicholas Monteleone
- Department of Chemical and Biological Engineering University of Colorado‐Boulder Boulder Colorado USA
| | - Irina Kopyeva
- Department of Chemical and Biological Engineering University of Colorado‐Boulder Boulder Colorado USA
- Current address: Department of Bioengineering University of Washington Seattle Washington USA
| | - Stephanie J. Bryant
- Department of Chemical and Biological Engineering University of Colorado‐Boulder Boulder Colorado USA
- Materials Science and Engineering Program University of Colorado‐Boulder Boulder Colorado USA
- BioFrontiers Institute University of Colorado‐Boulder Boulder Colorado USA
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117
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Thankam FG, Diaz C, Chandra I, Link J, Newton J, Dilisio MF, Agrawal DK. Hybrid interpenetrating hydrogel network favoring the bidirectional migration of tenocytes for rotator cuff tendon regeneration. J Biomed Mater Res B Appl Biomater 2021; 110:467-477. [PMID: 34342931 DOI: 10.1002/jbm.b.34924] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2020] [Revised: 06/26/2021] [Accepted: 07/25/2021] [Indexed: 02/02/2023]
Abstract
Replenishment of tenocytes to the injury site is an ideal strategy to improve healing response and accelerate the tendon ECM regeneration. The present study focused on the synthesis and characterization of a hybrid hydrogel scaffold system poly(propylene-fumarate)-alginate-polyvinyl alcohol-acrylic acid (PAPA) using poly(propylene-fumarate) (PPF), alginate, polyvinyl alcohol (PVA) and acrylic acid and the in vitro investigation of bidirectional mobility of swine shoulder tenocytes (SST) for its potential application in rotator-cuff tendon regeneration. IR analysis revealed the presence of alginate, PPF and PVA segments on the surface, SEM and AFM analyses revealed the porous and nano-topographical features of PAPA, respectively, swelling was 712.6 ± 84.21% with the EWC (%) of 87.59 ± 1.26 having the diffusional exponent and swelling constant 0.551 and 1.8, respectively. PAPA was biodegradable, cytocompatible and supported long-term survival of SSTs. SEM imaging revealed the adhesion, colonization, and sheet formation of SSTs within the PAPA hydrogel network. The SSTs seeded on the PAPA scaffolds were peculiar for their bidirectional migration as the anterograde movement was completed in 9 days whereas the retrograde infiltration occurred up to the depth of 198 μm. These findings suggest the promising translational potential of PAPA scaffold system in the management of rotator cuff tendon injury.
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Affiliation(s)
- Finosh G Thankam
- Department of Translational Research, Western University of Health Sciences, Pomona, California, USA
| | - Connor Diaz
- Departments of Clinical & Translational Science and Orthopedic Surgery, Creighton University School of Medicine, Omaha, Nebraska, USA
| | - Isaiah Chandra
- Departments of Clinical & Translational Science and Orthopedic Surgery, Creighton University School of Medicine, Omaha, Nebraska, USA
| | - Josh Link
- Departments of Clinical & Translational Science and Orthopedic Surgery, Creighton University School of Medicine, Omaha, Nebraska, USA
| | - Joseph Newton
- Departments of Clinical & Translational Science and Orthopedic Surgery, Creighton University School of Medicine, Omaha, Nebraska, USA
| | - Matthew F Dilisio
- Departments of Clinical & Translational Science and Orthopedic Surgery, Creighton University School of Medicine, Omaha, Nebraska, USA
| | - Devendra K Agrawal
- Department of Translational Research, Western University of Health Sciences, Pomona, California, USA
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118
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Karabıyık Acar Ö, Bedir S, Kayitmazer AB, Kose GT. Chondro-inductive hyaluronic acid/chitosan coacervate-based scaffolds for cartilage tissue engineering. Int J Biol Macromol 2021; 188:300-312. [PMID: 34358603 DOI: 10.1016/j.ijbiomac.2021.07.176] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2021] [Revised: 07/22/2021] [Accepted: 07/27/2021] [Indexed: 12/15/2022]
Abstract
Injuries related to articular cartilage are among the most challenging musculoskeletal problems because of poor repair capacity of this tissue. The lack of efficient treatments for chondral defects has stimulated research on cartilage tissue engineering applications combining porous biocompatible scaffolds with stem cells in the presence of external stimuli. This work presents the role of rat bone marrow mesenchymal stem cell (BMSC) encapsulated-novel three-dimensional (3D) coacervate scaffolds prepared through complex coacervation between different chitosan salts (CHI) and sodium hyaluronate (HA). The 3D architecture of BMSC encapsulated scaffolds (HA/CHI) was shown by scanning electron microscopy (SEM) to have an interconnected structure to allow cell-cell and cell-matrix interactions. Chondrogenic induction of encapsulated BMSCs within HA/CHI coacervates demonstrated remarkable cellular viability in addition to the elevated expression levels of chondrogenic markers such as sex determining region Y-box 9 protein (SOX9), aggrecan (ACAN), cartilage oligomeric matrix protein (COMP) and collagen type II (COL2A1) by immunofluorescence staining, qPCR and ELISA test. Collectively, HA/CHI coacervates are promising candidates for future use of these scaffolds in cartilage tissue engineering applications.
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Affiliation(s)
- Özge Karabıyık Acar
- Department of Genetics and Bioengineering, Faculty of Engineering, Yeditepe University, Istanbul, Turkey.
| | - Seden Bedir
- Department of Genetics and Bioengineering, Faculty of Engineering, Yeditepe University, Istanbul, Turkey
| | | | - Gamze Torun Kose
- Department of Genetics and Bioengineering, Faculty of Engineering, Yeditepe University, Istanbul, Turkey.
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119
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Hamilton M, Harrington S, Dhar P, Stehno-Bittel L. Hyaluronic Acid Hydrogel Microspheres for Slow Release Stem Cell Delivery. ACS Biomater Sci Eng 2021; 7:3754-3763. [PMID: 34323078 DOI: 10.1021/acsbiomaterials.1c00658] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
Cell therapies are hampered by a lack of available delivery systems, resulting in inconsistent outcomes in animal studies and human clinical trials. Hydrogel encapsulants offer a broad range of tunable characteristics in the design of cell delivery vehicles. The focus of the hydrogel field has been on durable encapsulants that provide long-term paracrine function of the cells. However, some cell therapies require cell-to-cell contact in order to elicit their effect. Controlled release microencapsulants would be beneficial in these situations, but appropriate polymers have not been adaptable to microsphere manufacturing because they harden too slowly. We developed and tested a novel microencapsulant formulation (acrylated hyaluronic acid: AHA) with degradation characteristics as a controlled release cell delivery vehicle. The properties of AHA microspheres were evaluated and compared to those of poly(ethylene glycol) diacrylate (PEGDA), a durable hydrogel. AHA microspheres possessed a higher swelling ratio, lower diffusion barrier, faster degradation rate, a lower storage modulus, and a larger average diameter than microspheres composed of PEGDA. Additionally, in vitro cell viability and release and short-term in vivo biocompatibility in immune competent Sprague-Dawley rats was assessed for each microsphere type. Compared to PEGDA, microspheres composed of AHA resulted in significantly less foreign body response in vivo as measured by a lack of cellularity or fibrotic ring in the surrounding tissue and no cellular infiltration into the microsphere. This study illustrates the potential of AHA microspheres as a degradable cell delivery system with superior encapsulated cell viability and biocompatibility with the surrounding tissue.
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Affiliation(s)
- Megan Hamilton
- University of Kansas Bioengineering Program, 1132 Learned Hall, 1530 West 15th Street, Lawrence, Kansas 66045, United States
| | - Stephen Harrington
- Likarda LLC, 10330 Hickman Mills Drive, Suite B, Kansas City, Missouri 64137, United States
| | - Prajnaparamita Dhar
- University of Kansas Bioengineering Program, 1132 Learned Hall, 1530 West 15th Street, Lawrence, Kansas 66045, United States.,Department of Chemical and Petroleum Engineering, The University of Kansas, 4132 Learned Hall, 1530 West 15th Street, Lawrence, Kansas 66045, United States
| | - Lisa Stehno-Bittel
- Likarda LLC, 10330 Hickman Mills Drive, Suite B, Kansas City, Missouri 64137, United States
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120
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Poorna MR, Jayakumar R, Chen JP, Mony U. Hydrogels: A potential platform for induced pluripotent stem cell culture and differentiation. Colloids Surf B Biointerfaces 2021; 207:111991. [PMID: 34333302 DOI: 10.1016/j.colsurfb.2021.111991] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2021] [Revised: 07/16/2021] [Accepted: 07/18/2021] [Indexed: 01/02/2023]
Abstract
Induced pluripotent stem cells (iPSCs) can be used to generate desired types of cells that belong to the three germ layers (i.e., ectoderm, endoderm and mesoderm). These cells possess great potential in regenerative medicine. Before iPSCs are used in various biomedical applications, the existing xenogeneic culture methods must be improved to meet the technical standards of safety, cost effectiveness, and ease of handling. In addition to commonly used 2D substrates, a culture system that mimics the native cellular environment in tissues will be a good choice when culturing iPS cells and differentiating them into different lineages. Hydrogels are potential candidates that recapitulate the native complex three-dimensional microenvironment. They possess mechanical properties similar to those of many soft tissues. Moreover, hydrogels support iPSC adhesion, proliferation and differentiation to various cell types. They are xeno-free and cost-effective. In addition to other substrates, such as mouse embryonic fibroblast (MEF), Matrigel, and vitronectin, the use of hydrogel-based substrates for iPSC culture and differentiation may help generate large numbers of clinical-grade cells that can be used in potential clinical applications. This review mainly focuses on the use of hydrogels for the culture and differentiation of iPSCs into various cell types and their potential applications in regenerative medicine.
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Affiliation(s)
- M R Poorna
- Centre for Nanosciences and Molecular Medicine, Amrita Vishwa Vidyapeetham, Kochi 682041, India
| | - R Jayakumar
- Centre for Nanosciences and Molecular Medicine, Amrita Vishwa Vidyapeetham, Kochi 682041, India
| | - Jyh-Ping Chen
- Department of Chemical and Materials Engineering, Chang Gung University, Kwei-San, Taoyuan 33302, Taiwan, ROC; Department of Plastic and Reconstructive Surgery and Craniofacial Research Center, Chang Gung Memorial Hospital, Linkou, Kwei-San, Taoyuan 33305, Taiwan, ROC; Research Center for Food and Cosmetic Safety, Research Center for Chinese Herbal Medicine, College of Human Ecology, Chang Gung University of Science and Technology, Taoyuan 33305, Taiwan, ROC.
| | - Ullas Mony
- Centre for Nanosciences and Molecular Medicine, Amrita Vishwa Vidyapeetham, Kochi 682041, India; Department of Biochemistry, Centre of Molecular Medicine and Diagnostics (COMManD), Saveetha Dental College and Hospitals, Saveetha Institute of Medical and Technical Sciences, Saveetha University, Chennai, 600077, India.
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121
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Göckler T, Haase S, Kempter X, Pfister R, Maciel BR, Grimm A, Molitor T, Willenbacher N, Schepers U. Tuning Superfast Curing Thiol-Norbornene-Functionalized Gelatin Hydrogels for 3D Bioprinting. Adv Healthc Mater 2021; 10:e2100206. [PMID: 34145799 DOI: 10.1002/adhm.202100206] [Citation(s) in RCA: 25] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2021] [Revised: 04/08/2021] [Indexed: 12/13/2022]
Abstract
Photocurable gelatin-based hydrogels have established themselves as powerful bioinks in tissue engineering due to their excellent biocompatibility, biodegradability, light responsiveness, thermosensitivity and bioprinting properties. While gelatin methacryloyl (GelMA) has been the gold standard for many years, thiol-ene hydrogel systems based on norbornene-functionalized gelatin (GelNB) and a thiolated crosslinker have recently gained increasing importance. In this paper, a highly reproducible water-based synthesis of GelNB is presented, avoiding the use of dimethyl sulfoxide (DMSO) as organic solvent and covering a broad range of degrees of functionalization (DoF: 20% to 97%). Mixing with thiolated gelatin (GelS) results in the superfast curing photoclick hydrogel GelNB/GelS. Its superior properties over GelMA, such as substantially reduced amounts of photoinitiator (0.03% (w/v)), superfast curing (1-2 s), higher network homogeneity, post-polymerization functionalization ability, minimal cross-reactivity with cellular components, and improved biocompatibility of hydrogel precursors and degradation products lead to increased survival of primary cells in 3D bioprinting. Post-printing viability analysis revealed excellent survival rates of > 84% for GelNB/GelS bioinks of varying crosslinking density, while cell survival for GelMA bioinks is strongly dependent on the DoF. Hence, the semisynthetic and easily accessible GelNB/GelS hydrogel is a highly promising bioink for future medical applications and other light-based biofabrication techniques.
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Affiliation(s)
- Tobias Göckler
- Karlsruhe Institute of Technology (KIT) Institute of Functional Interfaces (IFG) Hermann‐von‐Helmholtz‐Platz 1 Eggenstein‐Leopoldshafen 76344 Germany
| | - Sonja Haase
- Karlsruhe Institute of Technology (KIT) Institute of Functional Interfaces (IFG) Hermann‐von‐Helmholtz‐Platz 1 Eggenstein‐Leopoldshafen 76344 Germany
| | - Xenia Kempter
- Karlsruhe Institute of Technology (KIT) Institute of Functional Interfaces (IFG) Hermann‐von‐Helmholtz‐Platz 1 Eggenstein‐Leopoldshafen 76344 Germany
| | - Rebecca Pfister
- Karlsruhe Institute of Technology (KIT) Institute of Functional Interfaces (IFG) Hermann‐von‐Helmholtz‐Platz 1 Eggenstein‐Leopoldshafen 76344 Germany
| | - Bruna R. Maciel
- Karlsruhe Institute of Technology (KIT) Institute of Mechanical Process Engineering and Mechanics (MVM) Gotthard‐Franz‐Straße 3 Karlsruhe 76131 Germany
| | - Alisa Grimm
- Karlsruhe Institute of Technology (KIT) Institute of Functional Interfaces (IFG) Hermann‐von‐Helmholtz‐Platz 1 Eggenstein‐Leopoldshafen 76344 Germany
| | - Tamara Molitor
- Karlsruhe Institute of Technology (KIT) Institute of Functional Interfaces (IFG) Hermann‐von‐Helmholtz‐Platz 1 Eggenstein‐Leopoldshafen 76344 Germany
| | - Norbert Willenbacher
- Karlsruhe Institute of Technology (KIT) Institute of Mechanical Process Engineering and Mechanics (MVM) Gotthard‐Franz‐Straße 3 Karlsruhe 76131 Germany
| | - Ute Schepers
- Karlsruhe Institute of Technology (KIT) Institute of Functional Interfaces (IFG) Hermann‐von‐Helmholtz‐Platz 1 Eggenstein‐Leopoldshafen 76344 Germany
- Karlsruhe Institute of Technology (KIT) Institute of Organic Chemistry (IOC) Fritz‐Haber‐Weg 6 Karlsruhe 76131 Germany
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122
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Marchini A, Gelain F. Synthetic scaffolds for 3D cell cultures and organoids: applications in regenerative medicine. Crit Rev Biotechnol 2021; 42:468-486. [PMID: 34187261 DOI: 10.1080/07388551.2021.1932716] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
Three-dimensional (3D) cell cultures offer an unparalleled platform to recreate spatial arrangements of cells in vitro. 3D cell culture systems have gained increasing interest due to their evident advantages in providing more physiologically relevant information and more predictive data compared to their two-dimensional (2D) counterpart. Design and well-established fabrication of organoids (a particular type of 3D cell culture system) are nowadays considered a pivotal achievement for their ability to replicate in vitro cytoarchitecture and the functionalities of an organ. In this condition, pluripotent stem cells self-organize into 3D structures mimicking the in vivo microenvironments, architectures and multi-lineage differentiation. Scaffolds are key supporting elements in these 3D constructs, and Matrigel is the most commonly used matrix despite its relevant translation limitations including animal-derived sources, non-defined composition, batch-to-batch variability and poorly tailorable properties. Alternatively, 3D synthetic scaffolds, including self-assembling peptides, show promising biocompatibility and biomimetic properties, and can be tailored on specific target tissue/cells. In this review, we discuss the recent advances on 3D cell culture systems and organoids, promising tools for tissue engineering and regenerative medicine applications. For this purpose, we will describe the current state-of-the-art on 3D cell culture systems and organoids based on currently available synthetic-based biomaterials (including tailored self-assembling peptides) either tested in in vivo animal models or developed in vitro with potential application in the field of tissue engineering, with the aim to inspire researchers to take on such promising platforms for clinical applications in the near future.
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Affiliation(s)
- Amanda Marchini
- Tissue Engineering Unit, Institute for Stem Cell Biology, Regenerative Medicine and Innovative Therapies-ISBReMIT, Fondazione IRCSS Casa Sollievo della Sofferenza, San Giovanni Rotondo, Italy
| | - Fabrizio Gelain
- Tissue Engineering Unit, Institute for Stem Cell Biology, Regenerative Medicine and Innovative Therapies-ISBReMIT, Fondazione IRCSS Casa Sollievo della Sofferenza, San Giovanni Rotondo, Italy.,Center for Nanomedicine and Tissue Engineering (CNTE), ASST Grande Ospedale Metropolitano Niguarda, Milan, Italy
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123
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Qu X, Yan L, Liu S, Tan Y, Xiao J, Cao Y, Chen K, Xiao W, Li B, Liao X. Preparation of silk fibroin/hyaluronic acid hydrogels with enhanced mechanical performance by a combination of physical and enzymatic crosslinking. JOURNAL OF BIOMATERIALS SCIENCE-POLYMER EDITION 2021; 32:1635-1653. [PMID: 34004124 DOI: 10.1080/09205063.2021.1932070] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Silk fibroin (SF) from Bombyx mori is a natural polymer with exceptional biocompatibility, low immunogenicity, and ease of processability. SF-based hydrogels have been identified as one of the most attractive candidate scaffolds for tissue engineering and can be fabricated through various physical or chemical crosslinking approaches. However, conventional SF hydrogels may suffer from several major drawbacks, such as structural inhomogeneity, poor mechanical properties or utilization of cytotoxic reagents. Herein, a dually crosslinked SF-based composite hydrogel with enhanced strength and elasticity was fabricated by inducing the formation of uniform and small β-sheet structures by sonication in a restricted enzymatic precrosslinked network. The composite hydrogel not only demonstrated concentration-dependent stiffness variation but also exhibited time-dependent changes in toughness behavior. Moreover, subsequent experimental results revealed that the hydrogels exhibit other advantages, including high water retention capacity and long-term stability under physiological conditions. Finally, a three-dimensional (3 D) construct of the cell-laden hydrogel was fabricated, confirming that the composite hydrogel could provide a biocompatible microenvironment with dynamically changing mechanical properties. The combination of physical and enzymatic crosslinking strategies contributes to a biocompatible composite hydrogel with unique mechanical properties that holds great potential for use in tissue engineering and regenerative medicine.
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Affiliation(s)
- Xiaohang Qu
- Chongqing Key Laboratory of Nano/Micro Composite Materials and Devices, School of Metallurgy and Materials Engineering, Chongqing University of Science and Technology, Chongqing, P. R. China
| | - Ling Yan
- Chongqing Engineering Laboratory of Nano/Micro Biomedical Detection Technology, School of Metallurgy and Materials Engineering, Chongqing University of Science and Technology, Chongqing, P. R. China
| | - Shuang Liu
- Chongqing Key Laboratory of Nano/Micro Composite Materials and Devices, School of Metallurgy and Materials Engineering, Chongqing University of Science and Technology, Chongqing, P. R. China
| | - Yunfei Tan
- Chongqing Engineering Laboratory of Nano/Micro Biomedical Detection Technology, School of Metallurgy and Materials Engineering, Chongqing University of Science and Technology, Chongqing, P. R. China
| | - Jing Xiao
- Chongqing Engineering Laboratory of Nano/Micro Biomedical Detection Technology, School of Metallurgy and Materials Engineering, Chongqing University of Science and Technology, Chongqing, P. R. China
| | - Yuan Cao
- Chongqing Engineering Laboratory of Nano/Micro Biomedical Detection Technology, School of Metallurgy and Materials Engineering, Chongqing University of Science and Technology, Chongqing, P. R. China
| | - Ke Chen
- Chongqing Engineering Laboratory of Nano/Micro Biomedical Detection Technology, School of Metallurgy and Materials Engineering, Chongqing University of Science and Technology, Chongqing, P. R. China
| | - Wenqian Xiao
- Chongqing Key Laboratory of Nano/Micro Composite Materials and Devices, School of Metallurgy and Materials Engineering, Chongqing University of Science and Technology, Chongqing, P. R. China
| | - Bo Li
- Chongqing Engineering Laboratory of Nano/Micro Biomedical Detection Technology, School of Metallurgy and Materials Engineering, Chongqing University of Science and Technology, Chongqing, P. R. China
| | - Xiaoling Liao
- Chongqing Engineering Laboratory of Nano/Micro Biomedical Detection Technology, School of Metallurgy and Materials Engineering, Chongqing University of Science and Technology, Chongqing, P. R. China
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Armstrong JPK, Keane TJ, Roques AC, Patrick PS, Mooney CM, Kuan WL, Pisupati V, Oreffo ROC, Stuckey DJ, Watt FM, Forbes SJ, Barker RA, Stevens MM. A blueprint for translational regenerative medicine. Sci Transl Med 2021; 12:12/572/eaaz2253. [PMID: 33268507 DOI: 10.1126/scitranslmed.aaz2253] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2019] [Accepted: 03/05/2020] [Indexed: 12/11/2022]
Abstract
The past few decades have produced a large number of proof-of-concept studies in regenerative medicine. However, the route to clinical adoption is fraught with technical and translational obstacles that frequently consign promising academic solutions to the so-called "valley of death." Here, we present a proposed blueprint for translational regenerative medicine. We offer principles to help guide the selection of cells and materials, present key in vivo imaging modalities, and argue that the host immune response should be considered throughout design and development. Last, we suggest a pathway to navigate the often complex regulatory and manufacturing landscape of translational regenerative medicine.
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Affiliation(s)
- James P K Armstrong
- Department of Materials, Imperial College London, London SW7 2AZ, UK. .,Department of Bioengineering, Imperial College London, London SW7 2AZ, UK.,Institute of Biomedical Engineering, Imperial College London, London SW7 2AZ, UK
| | - Timothy J Keane
- Department of Materials, Imperial College London, London SW7 2AZ, UK.,Department of Bioengineering, Imperial College London, London SW7 2AZ, UK.,Institute of Biomedical Engineering, Imperial College London, London SW7 2AZ, UK
| | - Anne C Roques
- Department of Bioengineering, Imperial College London, London SW7 2AZ, UK
| | - P Stephen Patrick
- Centre for Advanced Biomedical Imaging, University College London, London WC1E 6DD, UK
| | - Claire M Mooney
- Centre for Stem Cells and Regenerative Medicine, King's College London, London SE1 9RT, UK
| | - Wei-Li Kuan
- John van Geest Centre for Brain Repair and Wellcome - MRC Cambridge Stem Cell Institute, University of Cambridge, Cambridge CB2 0PY, UK
| | - Venkat Pisupati
- John van Geest Centre for Brain Repair and Wellcome - MRC Cambridge Stem Cell Institute, University of Cambridge, Cambridge CB2 0PY, UK
| | - Richard O C Oreffo
- Centre for Human Development, Stem Cells and Regeneration, University of Southampton, Southampton SO16 6YD, UK
| | - Daniel J Stuckey
- Centre for Advanced Biomedical Imaging, University College London, London WC1E 6DD, UK
| | - Fiona M Watt
- Centre for Stem Cells and Regenerative Medicine, King's College London, London SE1 9RT, UK
| | - Stuart J Forbes
- Centre for Regenerative Medicine, University of Edinburgh, Edinburgh EH16 4UU, UK
| | - Roger A Barker
- John van Geest Centre for Brain Repair and Wellcome - MRC Cambridge Stem Cell Institute, University of Cambridge, Cambridge CB2 0PY, UK
| | - Molly M Stevens
- Department of Materials, Imperial College London, London SW7 2AZ, UK. .,Department of Bioengineering, Imperial College London, London SW7 2AZ, UK.,Institute of Biomedical Engineering, Imperial College London, London SW7 2AZ, UK
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125
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Hydrodynamic Focusing-Enabled Blood Vessel Fabrication for in Vitro Modeling of Neural Surrogates. J Med Biol Eng 2021. [DOI: 10.1007/s40846-021-00629-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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126
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Wu CY, Wu TY, Guan ZY, Wang PY, Yang YC, Huang CW, Lin TH, Chen HY. Vapor-phased fabrication and modulation of cell-laden scaffolding materials. Nat Commun 2021; 12:3413. [PMID: 34099701 PMCID: PMC8184845 DOI: 10.1038/s41467-021-23776-8] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2020] [Accepted: 05/18/2021] [Indexed: 11/09/2022] Open
Abstract
Bottom-up approaches using building blocks of modules to fabricate scaffolds for tissue engineering applications have enabled the fabrication of structurally complex and multifunctional materials allowing for physical and chemical flexibility to better mimic the native extracellular matrix. Here we report a vapor-phased fabrication process for constructing three-dimensional modulated scaffold materials via simple steps based on controlling mass transport of vapor sublimation and deposition. We demonstrate the fabrication of scaffolds comprised of multiple biomolecules and living cells with built-in boundaries separating the distinct compartments containing defined biological configurations and functions. We show that the fabricated scaffolds have mass production potential. We demonstrate overall >80% cell viability of encapsulated cells and that modulated scaffolds exhibit enhanced cell proliferation, osteogenesis, and neurogenesis, which can be assembled into various geometric configurations. We perform cell co-culture experiments to show independent osteogenesis and angiogenesis activities from separate compartments in one scaffold construct.
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Affiliation(s)
- Chih-Yu Wu
- Department of Chemical Engineering, National Taiwan University, Taipei, Taiwan
- Molecular Imaging Center, National Taiwan University, Taipei, Taiwan
- Advanced Research Center for Green Materials Science and Technology, National Taiwan University, Taipei, Taiwan
| | - Ting-Ying Wu
- Department of Chemical Engineering, National Taiwan University, Taipei, Taiwan
| | - Zhen-Yu Guan
- Department of Chemical Engineering, National Taiwan University, Taipei, Taiwan
| | - Peng-Yuan Wang
- Center for Human Tissues and Organs Degeneration, Institute of Biomedicine and Biotechnology, Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen, China
| | - Yen-Ching Yang
- Department of Chemical Engineering, National Taiwan University, Taipei, Taiwan
| | - Chao-Wei Huang
- Department of Tropical Agriculture and International Cooperation, National Pingtung University of Science and Technology, Pingtung, Taiwan
| | - Tzu-Hung Lin
- Material and Chemical Research Laboratories, Industrial Technology Research Institute, Hsinchu, Taiwan
| | - Hsien-Yeh Chen
- Department of Chemical Engineering, National Taiwan University, Taipei, Taiwan.
- Molecular Imaging Center, National Taiwan University, Taipei, Taiwan.
- Advanced Research Center for Green Materials Science and Technology, National Taiwan University, Taipei, Taiwan.
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127
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Qu M, Wang C, Zhou X, Libanori A, Jiang X, Xu W, Zhu S, Chen Q, Sun W, Khademhosseini A. Multi-Dimensional Printing for Bone Tissue Engineering. Adv Healthc Mater 2021; 10:e2001986. [PMID: 33876580 PMCID: PMC8192454 DOI: 10.1002/adhm.202001986] [Citation(s) in RCA: 35] [Impact Index Per Article: 11.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2020] [Revised: 03/15/2021] [Indexed: 02/05/2023]
Abstract
The development of 3D printing has significantly advanced the field of bone tissue engineering by enabling the fabrication of scaffolds that faithfully recapitulate desired mechanical properties and architectures. In addition, computer-based manufacturing relying on patient-derived medical images permits the fabrication of customized modules in a patient-specific manner. In addition to conventional 3D fabrication, progress in materials engineering has led to the development of 4D printing, allowing time-sensitive interventions such as programed therapeutics delivery and modulable mechanical features. Therapeutic interventions established via multi-dimensional engineering are expected to enhance the development of personalized treatment in various fields, including bone tissue regeneration. Here, recent studies utilizing 3D printed systems for bone tissue regeneration are summarized and advances in 4D printed systems are highlighted. Challenges and perspectives for the future development of multi-dimensional printed systems toward personalized bone regeneration are also discussed.
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Affiliation(s)
- Moyuan Qu
- Department of Bioengineering, California NanoSystems Institute and Center for Minimally Invasive Therapeutics (C-MIT) University of California, Los Angeles, Los Angeles, CA 90095, USA
- The Affiliated Hospital of Stomatology, School of Stomatology, Zhejiang University School of Medicine and Key Laboratory of Oral Biomedical Research of Zhejiang Province, Hangzhou, Zhejiang, 310006, China
| | - Canran Wang
- Department of Bioengineering, California NanoSystems Institute and Center for Minimally Invasive Therapeutics (C-MIT) University of California, Los Angeles, Los Angeles, CA 90095, USA
| | - Xingwu Zhou
- Department of Bioengineering, California NanoSystems Institute and Center for Minimally Invasive Therapeutics (C-MIT) University of California, Los Angeles, Los Angeles, CA 90095, USA
- Department of Chemical and Biomolecular Engineering, University of California-Los Angeles, Los Angeles, CA 90095, USA
| | - Alberto Libanori
- Department of Bioengineering, California NanoSystems Institute and Center for Minimally Invasive Therapeutics (C-MIT) University of California, Los Angeles, Los Angeles, CA 90095, USA
| | - Xing Jiang
- Department of Bioengineering, California NanoSystems Institute and Center for Minimally Invasive Therapeutics (C-MIT) University of California, Los Angeles, Los Angeles, CA 90095, USA
- School of Nursing, Nanjing University of Chinese Medicine, Nanjing 210023, China
| | - Weizhe Xu
- The Affiliated Hospital of Stomatology, School of Stomatology, Zhejiang University School of Medicine and Key Laboratory of Oral Biomedical Research of Zhejiang Province, Hangzhou, Zhejiang, 310006, China
| | - Songsong Zhu
- State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu 610041, China
| | - Qianming Chen
- The Affiliated Hospital of Stomatology, School of Stomatology, Zhejiang University School of Medicine and Key Laboratory of Oral Biomedical Research of Zhejiang Province, Hangzhou, Zhejiang, 310006, China
| | - Wujin Sun
- Department of Bioengineering, California NanoSystems Institute and Center for Minimally Invasive Therapeutics (C-MIT) University of California, Los Angeles, Los Angeles, CA 90095, USA
- Terasaki Institute for Biomedical Innovation, Los Angeles, California 90064, United States
| | - Ali Khademhosseini
- Department of Bioengineering, California NanoSystems Institute and Center for Minimally Invasive Therapeutics (C-MIT) University of California, Los Angeles, Los Angeles, CA 90095, USA
- Department of Chemical and Biomolecular Engineering, University of California-Los Angeles, Los Angeles, CA 90095, USA
- Jonsson Comprehensive Cancer Center, Department of Radiology University of California-Los Angeles, Los Angeles, CA 90095, USA
- Terasaki Institute for Biomedical Innovation, Los Angeles, California 90064, United States
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128
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Guimarães CF, Ahmed R, Marques AP, Reis RL, Demirci U. Engineering Hydrogel-Based Biomedical Photonics: Design, Fabrication, and Applications. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2021; 33:e2006582. [PMID: 33929771 PMCID: PMC8647870 DOI: 10.1002/adma.202006582] [Citation(s) in RCA: 45] [Impact Index Per Article: 15.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/28/2020] [Revised: 11/30/2020] [Indexed: 05/18/2023]
Abstract
Light guiding and manipulation in photonics have become ubiquitous in events ranging from everyday communications to complex robotics and nanomedicine. The speed and sensitivity of light-matter interactions offer unprecedented advantages in biomedical optics, data transmission, photomedicine, and detection of multi-scale phenomena. Recently, hydrogels have emerged as a promising candidate for interfacing photonics and bioengineering by combining their light-guiding properties with live tissue compatibility in optical, chemical, physiological, and mechanical dimensions. Herein, the latest progress over hydrogel photonics and its applications in guidance and manipulation of light is reviewed. Physics of guiding light through hydrogels and living tissues, and existing technical challenges in translating these tools into biomedical settings are discussed. A comprehensive and thorough overview of materials, fabrication protocols, and design architectures used in hydrogel photonics is provided. Finally, recent examples of applying structures such as hydrogel optical fibers, living photonic constructs, and their use as light-driven hydrogel robots, photomedicine tools, and organ-on-a-chip models are described. By providing a critical and selective evaluation of the field's status, this work sets a foundation for the next generation of hydrogel photonic research.
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Affiliation(s)
- Carlos F. Guimarães
- 3B’s Research Group — Research Institute on Biomaterials, Biodegradables and Biomimetics, University of Minho, Headquarters of the European Institute of Excellence on Tissue Engineering and Regenerative Medicine, Guimarães, Portugal
- ICVS/3B’s – Portuguese Government Associate Laboratory, University of Minho, Braga and Guimarães, Portugal
- Bio-Acoustic MEMS in Medicine (BAMM) Laboratory, Canary Center at Stanford for Cancer Early Detection Department of Radiology, Stanford School of Medicine, Palo Alto, CA 94304, USA
| | - Rajib Ahmed
- Bio-Acoustic MEMS in Medicine (BAMM) Laboratory, Canary Center at Stanford for Cancer Early Detection Department of Radiology, Stanford School of Medicine, Palo Alto, CA 94304, USA
| | - Alexandra P. Marques
- 3B’s Research Group — Research Institute on Biomaterials, Biodegradables and Biomimetics, University of Minho, Headquarters of the European Institute of Excellence on Tissue Engineering and Regenerative Medicine, Guimarães, Portugal
- ICVS/3B’s – Portuguese Government Associate Laboratory, University of Minho, Braga and Guimarães, Portugal
| | - Rui L. Reis
- 3B’s Research Group — Research Institute on Biomaterials, Biodegradables and Biomimetics, University of Minho, Headquarters of the European Institute of Excellence on Tissue Engineering and Regenerative Medicine, Guimarães, Portugal
- ICVS/3B’s – Portuguese Government Associate Laboratory, University of Minho, Braga and Guimarães, Portugal
| | - Utkan Demirci
- Bio-Acoustic MEMS in Medicine (BAMM) Laboratory, Canary Center at Stanford for Cancer Early Detection Department of Radiology, Stanford School of Medicine, Palo Alto, CA 94304, USA
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129
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Engineering of Optimized Hydrogel Formulations for Cartilage Repair. Polymers (Basel) 2021; 13:polym13091526. [PMID: 34068542 PMCID: PMC8126049 DOI: 10.3390/polym13091526] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2021] [Revised: 04/23/2021] [Accepted: 05/01/2021] [Indexed: 11/16/2022] Open
Abstract
The ideal scaffold for cartilage regeneration is expected to provide adequate mechanical strength, controlled degradability, adhesion, and integration with the surrounding native tissue. As it does this, it mimics natural ECMs functions, which allow for nutrient diffusion and promote cell survival and differentiation. Injectable hydrogels based on tyramine (TA)-functionalized hyaluronic acid (HA) and dextran (Dex) are a promising approach for cartilage regeneration. The properties of the hydrogels used in this study were adjusted by varying polymer concentrations and ratios. To investigate the changes in properties and their effects on cellular behavior and cartilage matrix formation, different ratios of HA- and dextran-based hybrid hydrogels at both 5 and 10% w/v were prepared using a designed mold to control generation. The results indicated that the incorporation of chondrocytes in the hydrogels decreased their mechanical properties. However, rheological and compression analysis indicated that 5% w/v hydrogels laden with cells exhibit a significant increase in mechanical properties after 21 days when the constructs are cultured in a chondrogenic differentiation medium. Moreover, compared to the 10% w/v hydrogels, the 5% w/v hybrid hydrogels increased the deposition of the cartilage matrix, especially in constructs with a higher Dex-TA content. These results indicated that 5% w/v hybrid hydrogels with 25% HA-TA and 75% Dex-TA have a high potential as injectable scaffolds for cartilage tissue regeneration.
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130
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Sivaraj D, Chen K, Chattopadhyay A, Henn D, Wu W, Noishiki C, Magbual NJ, Mittal S, Mermin-Bunnell AM, Bonham CA, Trotsyuk AA, Barrera JA, Padmanabhan J, Januszyk M, Gurtner GC. Hydrogel Scaffolds to Deliver Cell Therapies for Wound Healing. Front Bioeng Biotechnol 2021; 9:660145. [PMID: 34012956 PMCID: PMC8126987 DOI: 10.3389/fbioe.2021.660145] [Citation(s) in RCA: 64] [Impact Index Per Article: 21.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2021] [Accepted: 04/07/2021] [Indexed: 02/06/2023] Open
Abstract
Cutaneous wounds are a growing global health burden as a result of an aging population coupled with increasing incidence of diabetes, obesity, and cancer. Cell-based approaches have been used to treat wounds due to their secretory, immunomodulatory, and regenerative effects, and recent studies have highlighted that delivery of stem cells may provide the most benefits. Delivering these cells to wounds with direct injection has been associated with low viability, transient retention, and overall poor efficacy. The use of bioactive scaffolds provides a promising method to improve cell therapy delivery. Specifically, hydrogels provide a physiologic microenvironment for transplanted cells, including mechanical support and protection from native immune cells, and cell-hydrogel interactions may be tailored based on specific tissue properties. In this review, we describe the current and future directions of various cell therapies and usage of hydrogels to deliver these cells for wound healing applications.
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Affiliation(s)
| | | | | | | | | | | | | | | | | | | | | | | | | | | | - Geoffrey C. Gurtner
- Division of Plastic and Reconstructive Surgery, Department of Surgery, Stanford University School of Medicine, Stanford, CA, United States
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131
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Ahn SH, Rath M, Tsao CY, Bentley WE, Raghavan SR. Single-Step Synthesis of Alginate Microgels Enveloped with a Covalent Polymeric Shell: A Simple Way to Protect Encapsulated Cells. ACS APPLIED MATERIALS & INTERFACES 2021; 13:18432-18442. [PMID: 33871957 DOI: 10.1021/acsami.0c20613] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Microgels of biopolymers such as alginate are widely used to encapsulate cells and other biological payloads. Alginate is an attractive material for cell encapsulation because it is nontoxic and convenient: spherical alginate gels are easily created by contacting aqueous droplets of sodium alginate with divalent cations such as Ca2+. Alginate chains in the gel become cross-linked by Ca2+ cations into a 3-D network. When alginate gels are placed in a buffer, however, the Ca2+ cross-links are eliminated by exchange with Na+, thereby weakening and degrading the gels. With time, encapsulated cells are released into the external solution. Here, we describe a simple solution to the above problem, which involves forming alginate gels enveloped by a thin shell of a covalently cross-linked gel. The shell is formed via free-radical polymerization using conventional monomers such as acrylamide (AAm) or acrylate derivatives, including polyethylene glycol diacrylate (PEGDA). The entire process is performed in a single step at room temperature (or 37 °C) under mild, aqueous conditions. It involves combining the alginate solution with a radical initiator, which is then introduced as droplets into a reservoir containing Ca2+ and monomers. Within minutes of either simple incubation or exposure to ultraviolet (UV) light, the droplets are converted into alginate-polymer microcapsules with a core of alginate and a shell of the polymer (AAm or PEGDA). The microcapsules are mechanically more robust than conventional alginate/Ca2+ microgels, and while the latter swell and degrade when placed in buffers or in chelators like sodium citrate, the former remain stable under all conditions. We encapsulate both bacteria and mammalian cells in these microcapsules and find that the cells remain viable and functional over time. Lastly, a variation of the synthesis technique is shown to generate multilayered microcapsules with a liquid core surrounded by concentric layers of alginate and AAm gels. We anticipate that the approaches presented here will find application in a variety of areas including cell therapies, artificial cells, drug delivery, and tissue engineering.
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Affiliation(s)
- So Hyun Ahn
- Department of Chemical & Biomolecular Engineering, University of Maryland, College Park, Maryland 20742, United States
| | - Medha Rath
- Department of Chemistry & Biochemistry, University of Maryland, College Park, Maryland 20742, United States
| | - Chen-Yu Tsao
- Fischell Department of Bioengineering, University of Maryland, College Park, Maryland 20742, United States
| | - William E Bentley
- Department of Chemical & Biomolecular Engineering, University of Maryland, College Park, Maryland 20742, United States
- Fischell Department of Bioengineering, University of Maryland, College Park, Maryland 20742, United States
| | - Srinivasa R Raghavan
- Department of Chemical & Biomolecular Engineering, University of Maryland, College Park, Maryland 20742, United States
- Department of Chemistry & Biochemistry, University of Maryland, College Park, Maryland 20742, United States
- Fischell Department of Bioengineering, University of Maryland, College Park, Maryland 20742, United States
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132
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Na KS, Fernandes-Cunha GM, Varela IB, Lee HJ, Seo YA, Myung D. Effect of mesenchymal stromal cells encapsulated within polyethylene glycol-collagen hydrogels formed in situ on alkali-burned corneas in an ex vivo organ culture model. Cytotherapy 2021; 23:500-509. [PMID: 33752960 PMCID: PMC10069134 DOI: 10.1016/j.jcyt.2021.02.001] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2020] [Revised: 02/01/2021] [Accepted: 02/01/2021] [Indexed: 10/21/2022]
Abstract
BACKGROUND AIMS Corneal inflammation after alkali burns often results in vision loss due to corneal opacification and neovascularization. Mesenchymal stem cells (MSCs) and their secreted factors (secretome) have been studied for their anti-inflammatory and anti-angiogenic properties with encouraging results. However, topical instillation of MSCs or their secretome is often accompanied by issues related to delivery or rapid washout. Polyethylene glycol (PEG) and collagen are well-known biomaterials used extensively in scaffolds for tissue engineering. To effectively suppress alkaline burn-induced corneal injury, the authors proposed encapsulating MSCs within collagen gels cross-linked with multi-functional PEG-succinimidyl esters as a means to deliver the secretome of immobilized MSCs. METHODS Human MSCs were added to a neutralized collagen solution and mixed with a solution of four-arm PEG-N-hydroxysuccinimide. An ex vivo organ culture was conducted using rabbit corneas injured by alkali burn. MSCs were encapsulated within PEG-collagen hydrogels and injected onto the wounded cornea immediately following alkali burn and washing. Photographs of the ocular surface were taken over a period of 7 days after the alkali burn and processed for immunohistochemical evaluation. Samples were split into three groups: injury without treatment, MSCs alone, and MSCs encapsulated within PEG-collagen hydrogels. RESULTS All corneas in ex vivo organ culture lost their transparency immediately after alkali burn, and only the groups treated with MSCs and MSCs encapsulated within PEG-collagen hydrogels recovered some transparency after 7 days. Immunohistochemical analysis revealed increased expression of vimentin in the anterior corneal stroma of the group without treatment indicative of fibrotic healing, whereas less stromal vimentin was detected in the group containing MSCs encapsulated within the PEG-collagen hydrogels. CONCLUSIONS PEG-collagen hydrogels enable the encapsulation of viable MSCs capable of releasing secreted factors onto the ocular surface. Encapsulating MSCs within PEG-collagen hydrogels may be a promising method for delivering their therapeutic benefits in cases of ocular inflammatory diseases, such as alkali burn injuries.
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Affiliation(s)
- Kyung-Sun Na
- Department of Ophthalmology, Yeouido St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul, South Korea
| | | | | | - Hyun Jong Lee
- Department of Chemical and Biological Engineering, Gachon University, Seongnam-si, South Korea
| | - Youngyoon Amy Seo
- Department of Ophthalmology, Byers Eye Institute, Stanford University School of Medicine, Palo Alto, California, USA
| | - David Myung
- Department of Ophthalmology, Byers Eye Institute, Stanford University School of Medicine, Palo Alto, California, USA; Department of Chemical and Biological Engineering, Gachon University, Seongnam-si, South Korea; VA Palo Alto HealthCare System, Palo Alto, California, USA.
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133
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Flores-Torres S, Peza-Chavez O, Kuasne H, Munguia-Lopez JG, Kort-Mascort J, Ferri L, Jiang T, Rajadurai CV, Park M, Sangwan V, Kinsella JM. Alginate-gelatin-Matrigel hydrogels enable the development and multigenerational passaging of patient-derived 3D bioprinted cancer spheroid models. Biofabrication 2021; 13. [PMID: 33440351 DOI: 10.1088/1758-5090/abdb87] [Citation(s) in RCA: 29] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2020] [Accepted: 01/13/2021] [Indexed: 12/20/2022]
Abstract
Hydrogels consisting of controlled fractions of alginate, gelatin, and Matrigel enable the development of patient-derived bioprinted tissue models that support cancer spheroid growth and expansion. These engineered models can be dissociated to be then reintroduced to new hydrogel solutions and subsequently reprinted to generate multigenerational models. The process of harvesting cells from 3D bioprinted models is possible by chelating the ions that crosslink alginate, causing the gel to weaken. Inclusion of the gelatin and Matrigel fractions to the hydrogel increases the bioactivity by providing cell-matrix binding sites and promoting cross-talk between cancer cells and their microenvironment. Here we show that immortalized triple-negative breast cancer cells (MDA-MB-231) and patient-derived gastric adenocarcinoma cells can be reprinted for at least three 21 d culture cycles following bioprinting in the alginate/gelatin/Matrigel hydrogels. Our drug testing results suggest that our 3D bioprinted model can also be used to recapitulatein vivopatient drug response. Furthermore, our results show that iterative bioprinting techniques coupled with alginate biomaterials can be used to maintain and expand patient-derived cancer spheroid cultures for extended periods without compromising cell viability, altering division rates, or disrupting cancer spheroid formation.
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Affiliation(s)
| | - Omar Peza-Chavez
- Department of Bioengineering, McGill University, Montreal, Quebec, Canada
| | - Hellen Kuasne
- Rosalind and Morris Goodman Cancer Centre, McGill University, Montreal, Quebec, Canada
| | - Jose G Munguia-Lopez
- Department of Bioengineering, McGill University, Montreal, Quebec, Canada.,Faculty of Dentistry, McGill University, Montreal, Quebec, Canada
| | | | - Lorenzo Ferri
- Department of Surgery, McGill University, Montreal, Quebec, Canada.,Department of Medicine, McGill University, Montreal, Quebec, Canada
| | - Tao Jiang
- Department of Intelligent Machinery and Instrument, College of Intelligence Science and Technology, National University of Defense Technology, Changsha, Hunan, People's Republic of China
| | - Charles V Rajadurai
- Rosalind and Morris Goodman Cancer Centre, McGill University, Montreal, Quebec, Canada.,Department of Biochemistry, McGill University, Montreal, Quebec, Canada
| | - Morag Park
- Rosalind and Morris Goodman Cancer Centre, McGill University, Montreal, Quebec, Canada.,Department of Biochemistry, McGill University, Montreal, Quebec, Canada.,Department of Medicine, McGill University, Montreal, Quebec, Canada.,Department of Oncology, McGill University, Montreal, Quebec, Canada.,Department of Pathology, McGill University, Montreal, Quebec, Canada
| | - Veena Sangwan
- Department of Surgery, McGill University, Montreal, Quebec, Canada
| | - Joseph M Kinsella
- Department of Bioengineering, McGill University, Montreal, Quebec, Canada
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134
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Distler T, Kretzschmar L, Schneidereit D, Girardo S, Goswami R, Friedrich O, Detsch R, Guck J, Boccaccini AR, Budday S. Mechanical properties of cell- and microgel bead-laden oxidized alginate-gelatin hydrogels. Biomater Sci 2021; 9:3051-3068. [PMID: 33666608 DOI: 10.1039/d0bm02117b] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
3D-printing technologies, such as biofabrication, capitalize on the homogeneous distribution and growth of cells inside biomaterial hydrogels, ultimately aiming to allow for cell differentiation, matrix remodeling, and functional tissue analogues. However, commonly, only the mechanical properties of the bioinks or matrix materials are assessed, while the detailed influence of cells on the resulting mechanical properties of hydrogels remains insufficiently understood. Here, we investigate the properties of hydrogels containing cells and spherical PAAm microgel beads through multi-modal complex mechanical analyses in the small- and large-strain regimes. We evaluate the individual contributions of different filler concentrations and a non-fibrous oxidized alginate-gelatin hydrogel matrix on the overall mechanical behavior in compression, tension, and shear. Through material modeling, we quantify parameters that describe the highly nonlinear mechanical response of soft composite materials. Our results show that the stiffness significantly drops for cell- and bead concentrations exceeding four million per milliliter hydrogel. In addition, hydrogels with high cell concentrations (≥6 mio ml-1) show more pronounced material nonlinearity for larger strains and faster stress relaxation. Our findings highlight cell concentration as a crucial parameter influencing the final hydrogel mechanics, with implications for microgel bead drug carrier-laden hydrogels, biofabrication, and tissue engineering.
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Affiliation(s)
- T Distler
- Institute of Biomaterials, Department of Materials Science and Engineering, Friedrich-Alexander-University Erlangen-Nürnberg, 91058 Erlangen, Germany.
| | - L Kretzschmar
- Institute of Applied Mechanics, Department of Mechanical Engineering, Friedrich-Alexander-University Erlangen-Nürnberg, 91058 Erlangen, Germany.
| | - D Schneidereit
- Institute of Medical Biotechnology, Department of Chemical and Biological Engineering, Friedrich-Alexander-University Erlangen-Nürnberg, 91056 Erlangen, Germany
| | - S Girardo
- Max Planck Institute for the Science of Light and Max-Planck-Zentrum für Physik und Medizin, Erlangen-Nürnberg, 91058 Erlangen, Germany
| | - R Goswami
- Max Planck Institute for the Science of Light and Max-Planck-Zentrum für Physik und Medizin, Erlangen-Nürnberg, 91058 Erlangen, Germany
| | - O Friedrich
- Institute of Medical Biotechnology, Department of Chemical and Biological Engineering, Friedrich-Alexander-University Erlangen-Nürnberg, 91056 Erlangen, Germany
| | - R Detsch
- Institute of Biomaterials, Department of Materials Science and Engineering, Friedrich-Alexander-University Erlangen-Nürnberg, 91058 Erlangen, Germany.
| | - J Guck
- Max Planck Institute for the Science of Light and Max-Planck-Zentrum für Physik und Medizin, Erlangen-Nürnberg, 91058 Erlangen, Germany and Chair of Biological Optomechanics, Department of Physics, Friedrich-Alexander-University Erlangen-Nürnberg, 91058 Erlangen, Germany
| | - A R Boccaccini
- Institute of Biomaterials, Department of Materials Science and Engineering, Friedrich-Alexander-University Erlangen-Nürnberg, 91058 Erlangen, Germany.
| | - S Budday
- Institute of Applied Mechanics, Department of Mechanical Engineering, Friedrich-Alexander-University Erlangen-Nürnberg, 91058 Erlangen, Germany.
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135
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Sarrigiannidis S, Rey J, Dobre O, González-García C, Dalby M, Salmeron-Sanchez M. A tough act to follow: collagen hydrogel modifications to improve mechanical and growth factor loading capabilities. Mater Today Bio 2021; 10:100098. [PMID: 33763641 PMCID: PMC7973388 DOI: 10.1016/j.mtbio.2021.100098] [Citation(s) in RCA: 100] [Impact Index Per Article: 33.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2020] [Revised: 01/16/2021] [Accepted: 01/20/2021] [Indexed: 12/13/2022] Open
Abstract
Collagen hydrogels are among the most well-studied platforms for drug delivery and in situ tissue engineering, thanks to their low cost, low immunogenicity, versatility, biocompatibility, and similarity to the natural extracellular matrix (ECM). Despite collagen being largely responsible for the tensile properties of native connective tissues, collagen hydrogels have relatively low mechanical properties in the absence of covalent cross-linking. This is particularly problematic when attempting to regenerate stiffer and stronger native tissues such as bone. Furthermore, in contrast to hydrogels based on ECM proteins such as fibronectin, collagen hydrogels do not have any growth factor (GF)-specific binding sites and often cannot sequester physiological (small) amounts of the protein. GF binding and in situ presentation are properties that can aid significantly in the tissue regeneration process by dictating cell fate without causing adverse effects such as malignant tumorigenic tissue growth. To alleviate these issues, researchers have developed several strategies to increase the mechanical properties of collagen hydrogels using physical or chemical modifications. This can expand the applicability of collagen hydrogels to tissues subject to a continuous load. GF delivery has also been explored, mathematically and experimentally, through the development of direct loading, chemical cross-linking, electrostatic interaction, and other carrier systems. This comprehensive article explores the ways in which these parameters, mechanical properties and GF delivery, have been optimized in collagen hydrogel systems and examines their in vitro or in vivo biological effect. This article can, therefore, be a useful tool to streamline future studies in the field, by pointing researchers into the appropriate direction according to their collagen hydrogel design requirements.
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Affiliation(s)
| | | | - O. Dobre
- Centre for the Cellular Microenvironment, University of Glasgow, Glasgow G12 8LT, UK
| | - C. González-García
- Centre for the Cellular Microenvironment, University of Glasgow, Glasgow G12 8LT, UK
| | - M.J. Dalby
- Centre for the Cellular Microenvironment, University of Glasgow, Glasgow G12 8LT, UK
| | - M. Salmeron-Sanchez
- Centre for the Cellular Microenvironment, University of Glasgow, Glasgow G12 8LT, UK
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136
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Patel DK, Dutta SD, Shin WC, Ganguly K, Lim KT. Fabrication and characterization of 3D printable nanocellulose-based hydrogels for tissue engineering. RSC Adv 2021; 11:7466-7478. [PMID: 35423276 PMCID: PMC8695076 DOI: 10.1039/d0ra09620b] [Citation(s) in RCA: 31] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2020] [Accepted: 02/02/2021] [Indexed: 12/18/2022] Open
Abstract
Cellulose nanocrystal (CNC)-based hydrogels are considered attractive biomaterials for tissue engineering due to their excellent physicochemical properties. Hydrogels of alginate and gelatin were prepared with or without CNCs and printed using a CELLINK® BIOX 3D bio-printer. The 3D-printed scaffolds were characterized by Fourier transform infrared (FTIR) spectroscopy, Raman spectroscopy, transmission electron microscopy (TEM), and scanning electron microscopy (SEM). Improved mechanical strength was observed in the composite scaffolds compared to the pure polymer scaffolds. Fabricated scaffolds exhibited superior swelling potential; this property is profoundly affected by the CNC content of hydrogels. Biocompatibility of the fabricated scaffolds was monitored in the presence of human bone marrow-derived mesenchymal stem cells (hBMSCs) using the WST-1 assay. Notably, better cell viability was observed in the composite scaffolds than in the control, indicating improved biocompatibility of composites. Cells were healthy and adhered appropriately to the surface of the scaffolds. Mineralization potential of the prepared scaffolds was evaluated by the alizarin red S (ARS) staining technique in the presence of hBMSCs after 7 and 14 days of treatment. Enhanced mineral deposition was observed in the composite scaffolds compared to the control, indicating superior composite mineralization potential. Upregulation of osteogenic-associated genes was observed in the scaffold-treated groups relative to the control, showing superior scaffold osteogenic potential. These results demonstrate that 3D-printed scaffolds are potential candidates for bone tissue engineering applications.
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Affiliation(s)
- Dinesh K Patel
- Department of Biosystems Engineering, Institute of Forest Sciences, Kangwon National University Chuncheon-24341 Republic of Korea
| | - Sayan Deb Dutta
- Department of Biosystems Engineering, Institute of Forest Sciences, Kangwon National University Chuncheon-24341 Republic of Korea
| | - Woo-Chul Shin
- Department of Biosystems Engineering, Institute of Forest Sciences, Kangwon National University Chuncheon-24341 Republic of Korea
| | - Keya Ganguly
- Department of Biosystems Engineering, Institute of Forest Sciences, Kangwon National University Chuncheon-24341 Republic of Korea
| | - Ki-Taek Lim
- Department of Biosystems Engineering, Institute of Forest Sciences, Kangwon National University Chuncheon-24341 Republic of Korea
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137
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Adhikari J, Perwez MS, Das A, Saha P. Development of hydroxyapatite reinforced alginate–chitosan based printable biomaterial-ink. ACTA ACUST UNITED AC 2021. [DOI: 10.1016/j.nanoso.2020.100630] [Citation(s) in RCA: 20] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
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138
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Lisitsyna E, Efimov A, Depresle C, Cauchois P, Vuorimaa-Laukkanen E, Laaksonen T, Durandin N. Deciphering Multiple Critical Parameters of Polymeric Self-Assembly by Fluorescence Spectroscopy of a Single Molecular Rotor BODIPY-C12. Macromolecules 2021. [DOI: 10.1021/acs.macromol.0c02167] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Ekaterina Lisitsyna
- Faculty of Engineering and Natural Sciences, Tampere University, Korkeakoulunkatu 8, 33720 Tampere, Finland
| | - Alexander Efimov
- Faculty of Engineering and Natural Sciences, Tampere University, Korkeakoulunkatu 8, 33720 Tampere, Finland
| | - Clémentine Depresle
- Faculty of Engineering and Natural Sciences, Tampere University, Korkeakoulunkatu 8, 33720 Tampere, Finland
- INSA Rouen Normandie, 685 Avenue de l’université, 76800 Saint-Etienne-du-Rouvray, France
| | - Pierre Cauchois
- Faculty of Engineering and Natural Sciences, Tampere University, Korkeakoulunkatu 8, 33720 Tampere, Finland
- Ecole Nationale Supérieure de Chimie de Lille, Avenue Mendeleiev, 59652 Villeneuve-d’Ascq, France
| | - Elina Vuorimaa-Laukkanen
- Faculty of Engineering and Natural Sciences, Tampere University, Korkeakoulunkatu 8, 33720 Tampere, Finland
| | - Timo Laaksonen
- Faculty of Engineering and Natural Sciences, Tampere University, Korkeakoulunkatu 8, 33720 Tampere, Finland
- Drug Research Program, Division of Pharmaceutical Biosciences, Faculty of Pharmacy, University of Helsinki, FI-00014 Helsinki, Finland
| | - Nikita Durandin
- Faculty of Engineering and Natural Sciences, Tampere University, Korkeakoulunkatu 8, 33720 Tampere, Finland
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139
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Khayambashi P, Iyer J, Pillai S, Upadhyay A, Zhang Y, Tran SD. Hydrogel Encapsulation of Mesenchymal Stem Cells and Their Derived Exosomes for Tissue Engineering. Int J Mol Sci 2021; 22:E684. [PMID: 33445616 PMCID: PMC7827932 DOI: 10.3390/ijms22020684] [Citation(s) in RCA: 100] [Impact Index Per Article: 33.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2020] [Revised: 12/29/2020] [Accepted: 01/04/2021] [Indexed: 12/16/2022] Open
Abstract
Tissue engineering has been an inveterate area in the field of regenerative medicine for several decades. However, there remains limitations to engineer and regenerate tissues. Targeted therapies using cell-encapsulated hydrogels, such as mesenchymal stem cells (MSCs), are capable of reducing inflammation and increasing the regenerative potential in several tissues. In addition, the use of MSC-derived nano-scale secretions (i.e., exosomes) has been promising. Exosomes originate from the multivesicular division of cells and have high therapeutic potential, yet neither self-replicate nor cause auto-immune reactions to the host. To maintain their biological activity and allow a controlled release, these paracrine factors can be encapsulated in biomaterials. Among the different types of biomaterials in which exosome infusion is exploited, hydrogels have proven to be the most user-friendly, economical, and accessible material. In this paper, we highlight the importance of MSCs and MSC-derived exosomes in tissue engineering and the different biomaterial strategies used in fabricating exosome-based biomaterials, to facilitate hard and soft tissue engineering.
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Affiliation(s)
| | | | | | | | | | - Simon D. Tran
- McGill Craniofacial Tissue Engineering and Stem Cells Laboratory, Faculty of Dentistry, McGill University, 3640 University Street, Montreal, QC H3A 0C7, Canada; (P.K.); (J.I.); (S.P.); (A.U.); (Y.Z.)
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140
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Awang-Junaidi AH, Singh J, Honaramooz A. Regeneration of testis tissue after ectopic implantation of porcine testis cell aggregates in mice: improved consistency of outcomes and in situ monitoring. Reprod Fertil Dev 2021; 32:594-609. [PMID: 32051087 DOI: 10.1071/rd19043] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2019] [Accepted: 10/08/2019] [Indexed: 12/12/2022] Open
Abstract
Ectopic implantation of donor testis cell aggregates in recipient mice results in de novo formation or regeneration of testis tissue and, as such, provides a unique invivo model for the study of testis development. However, currently the results are inconsistent and the efficiency of the model remains low. This study was designed to: (1) examine several factors that can potentially improve the consistency and efficiency of this model and (2) explore the use of ultrasound biomicroscopy (UBM) for the non-invasive invivo evaluation of implants. Testis cell aggregates, containing ~40% gonocytes, from 1-week-old donor piglets were implanted under the back skin of immunodeficient mice through skin incisions using gel matrices or through subcutaneous injection without using gel matrices. The addition of gel matrices led to inconsistent tissue development; gelatin had the greatest development, followed by collagen, whereas agarose resulted in poor development. The results also depended on the implanted cell numbers since implants with 100×106 cells were larger than those with 50×106 cells. The injection approach for cell implantation was less invasive and resulted in more consistent and efficient testis tissue development. UBM provided promising results as a means of non-invasive monitoring of implants.
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Affiliation(s)
- Awang Hazmi Awang-Junaidi
- Department of Veterinary Biomedical Sciences, Western College of Veterinary Medicine, University of Saskatchewan, Saskatoon, SK S7N 5B4 Canada; and Present address: Department of Veterinary Preclinical Sciences, Faculty of Veterinary Medicine, Universiti Putra Malaysia, 43400 UPM Serdang, Selangor Darul Ehsan, Malaysia
| | - Jaswant Singh
- Department of Veterinary Biomedical Sciences, Western College of Veterinary Medicine, University of Saskatchewan, Saskatoon, SK S7N 5B4 Canada
| | - Ali Honaramooz
- Department of Veterinary Biomedical Sciences, Western College of Veterinary Medicine, University of Saskatchewan, Saskatoon, SK S7N 5B4 Canada; and Corresponding author.
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141
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Reakasame S, Jin A, Zheng K, Qu M, Boccaccini AR. Biofabrication and Characterization of Alginate Dialdehyde-Gelatin Microcapsules Incorporating Bioactive Glass for Cell Delivery Application. Macromol Biosci 2021; 20:e2000138. [PMID: 33405347 DOI: 10.1002/mabi.202000138] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2020] [Revised: 07/10/2020] [Indexed: 12/23/2022]
Abstract
The effect of the incorporation of 45S5 bioactive glass (BG) microparticles (mean particle size ≈ 2 µm) on the fabrication and physicochemical properties of alginate dialdehyde-gelatin hydrogel capsules is investigated. The addition of BG particles decreases the hydrogel gelation time by ≈79% and 91% for the samples containing 0.1% w/v and 0.5% w/v BG, respectively. Moreover, it results in increasing average diameter of hydrogel capsules produced via a pressure-driven extrusion technique from about 1000 µm for the samples without BG to about 1700 and 1900 µm for the samples containing BG at concentrations of 0.1% w/v and 0.5% w/v, respectively. The presence of BG particles in the capsules decreases the degradation rate and improves the bioactivity of the materials. The viability of MG-63 cells encapsulated in all samples increases during the first 7 d of cultivation and maintains the same level during 21 d of cultivation. The early cell viability in samples containing BG is lower than that in samples without BG. The results show that 45S5 BG can positively regulate the osteogenic activity of cells incorporated in hydrogel capsules. The fabricated composite capsules exhibit promising potential for cell delivery in bone regeneration applications.
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Affiliation(s)
- Supachai Reakasame
- Institute of Biomaterials, University of Erlangen-Nuremberg, Cauerstr. 6, 91058, Erlangen, Germany
| | - Anbang Jin
- Institute of Biomaterials, University of Erlangen-Nuremberg, Cauerstr. 6, 91058, Erlangen, Germany
| | - Kai Zheng
- Institute of Biomaterials, University of Erlangen-Nuremberg, Cauerstr. 6, 91058, Erlangen, Germany
| | - Muchao Qu
- Institute of Polymer Materials, University of Erlangen-Nuremberg, Martensstr. 7, 91058, Erlangen, Germany
| | - Aldo R Boccaccini
- Institute of Biomaterials, University of Erlangen-Nuremberg, Cauerstr. 6, 91058, Erlangen, Germany
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142
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Peng YY, Cheng Q, Wang W, Wu M, Diaz-Dussan D, Kumar P, Narain R. Multi-responsive, injectable, and self-healing hydrogels based on benzoxaborole–tannic acid complexation. Polym Chem 2021. [DOI: 10.1039/d1py00692d] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Abstract
A bio-inspired, multi-responsive, injectable, and self-healing hydrogel was developed via the interaction of tannic acid (TA) and benzoxaborole-based linear copolymers.
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Affiliation(s)
- Yi-Yang Peng
- Department of Chemical and Material Engineering, University of Alberta, Edmonton, Alberta T6G 1H9, Canada
| | - Qiuli Cheng
- Chemical Engineering and Phamaceutics School, Henan University of Science and Technology, Luoyang 471023, P. R. China
| | - Wenda Wang
- Department of Chemical and Material Engineering, University of Alberta, Edmonton, Alberta T6G 1H9, Canada
| | - Meng Wu
- Department of Chemical and Material Engineering, University of Alberta, Edmonton, Alberta T6G 1H9, Canada
| | - Diana Diaz-Dussan
- Department of Chemical and Material Engineering, University of Alberta, Edmonton, Alberta T6G 1H9, Canada
| | - Piyush Kumar
- Department of Oncology, University of Alberta, Cross Cancer Institute, Edmonton, T6G 1Z2, Alberta, Canada
| | - Ravin Narain
- Department of Chemical and Material Engineering, University of Alberta, Edmonton, Alberta T6G 1H9, Canada
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143
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Pepelanova I. Tunable Hydrogels: Introduction to the World of Smart Materials for Biomedical Applications. ADVANCES IN BIOCHEMICAL ENGINEERING/BIOTECHNOLOGY 2021; 178:1-35. [PMID: 33903929 DOI: 10.1007/10_2021_168] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Hydrogels are hydrated polymers that are able to mimic many of the properties of living tissues. For this reason, they have become a popular choice of biomaterial in many biomedical applications including tissue engineering, drug delivery, and biosensing. The physical and biological requirements placed on hydrogels in these contexts are numerous and require a tunable material, which can be adapted to meet these demands. Tunability is defined as the use of knowledge-based tools to manipulate material properties in the desired direction. Engineering of suitable mechanical properties and integrating bioactivity are two major aspects of modern hydrogel design. Beyond these basic features, hydrogels can be tuned to respond to specific environmental cues and external stimuli, which are provided by surrounding cells or by the end user (patient, clinician, or researcher). This turns tunable hydrogels into stimulus-responsive smart materials, which are able to display adaptable and dynamic properties. In this book chapter, we will first shortly cover the foundation of hydrogel tunability, related to mechanical properties and biological functionality. Then, we will move on to stimulus-responsive hydrogel systems and describe their basic design, as well as give examples of their application in diverse biomedical fields. As both the understanding of underlying biological mechanisms and our engineering capacity mature, even more sophisticated tunable hydrogels addressing specific therapeutic goals will be developed.
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Affiliation(s)
- Iliyana Pepelanova
- Institute of Technical Chemistry, Leibniz University of Hannover, Hanover, Germany.
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144
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Rothe R, Xu Y, Thomas AK, Meister S, Zhang Y, Pietzsch J, Hauser S. A modular, injectable, non-covalently assembled hydrogel system features widescale tunable degradability for controlled release and tissue integration. Biomaterials 2020; 269:120637. [PMID: 33450583 DOI: 10.1016/j.biomaterials.2020.120637] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2020] [Revised: 12/23/2020] [Accepted: 12/27/2020] [Indexed: 12/25/2022]
Abstract
Biomaterials with attenuated adverse host tissue reactions, and meanwhile, combining biocompatibility with mimicry of mechanical and biochemical cues of native extracellular matrices (ECM) to promote integration and regeneration of tissues are important for many biomedical applications. Further, the materials should also be tailorable to feature desired application-related functions, like tunable degradability, injectability, or controlled release of bioactive molecules. Herein, a non-covalently assembled, injectable hydrogel system based on oligopeptides interacting with sulphated polysaccharides is reported, showing high tolerability and biocompatibility in immunocompetent hairless mice. Altering the peptide or polysaccharide component considerably varies the in vivo degradation rate of the hydrogels, ranging from a half-life of three weeks to no detectable degradation after three months. The hydrogel with sulphated low molecular weight hyaluronic acid exhibits sustained degradation-mediated release of heparin-binding molecules in vivo, as shown by small animal magnetic resonance imaging and fluorescence imaging, and enhances the expression of vascular endothelial growth factor in hydrogel surrounding. In vitro investigations indicate that M2-macrophages could be responsible for the moderate difference in pro-angiogenic effects. The ECM-mimetic and injectable hydrogels represent tunable bioactive scaffolds for tissue engineering, also enabling controlled release of heparin-binding signalling molecules including many growth factors.
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Affiliation(s)
- Rebecca Rothe
- Helmholtz-Zentrum Dresden-Rossendorf, Institute of Radiopharmaceutical Cancer Research, Department of Radiopharmaceutical and Chemical Biology, Bautzner Landstraße 400, 01328, Dresden, Germany; Technische Universität Dresden, Faculty of Chemistry and Food Chemistry, School of Science, Mommsenstraße 66, 01062, Dresden, Germany
| | - Yong Xu
- B CUBE Center for Molecular Bioengineering, Technische Universität Dresden, Tatzberg 41, 01307, Dresden, Germany
| | - Alvin Kuriakose Thomas
- B CUBE Center for Molecular Bioengineering, Technische Universität Dresden, Tatzberg 41, 01307, Dresden, Germany
| | - Sebastian Meister
- Helmholtz-Zentrum Dresden-Rossendorf, Institute of Radiopharmaceutical Cancer Research, Department of Radiopharmaceutical and Chemical Biology, Bautzner Landstraße 400, 01328, Dresden, Germany
| | - Yixin Zhang
- B CUBE Center for Molecular Bioengineering, Technische Universität Dresden, Tatzberg 41, 01307, Dresden, Germany.
| | - Jens Pietzsch
- Helmholtz-Zentrum Dresden-Rossendorf, Institute of Radiopharmaceutical Cancer Research, Department of Radiopharmaceutical and Chemical Biology, Bautzner Landstraße 400, 01328, Dresden, Germany; Technische Universität Dresden, Faculty of Chemistry and Food Chemistry, School of Science, Mommsenstraße 66, 01062, Dresden, Germany.
| | - Sandra Hauser
- Helmholtz-Zentrum Dresden-Rossendorf, Institute of Radiopharmaceutical Cancer Research, Department of Radiopharmaceutical and Chemical Biology, Bautzner Landstraße 400, 01328, Dresden, Germany.
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145
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Das R, Fernandez JG. Cellulose Nanofibers for Encapsulation and Pluripotency Preservation in the Early Development of Embryonic Stem Cells. Biomacromolecules 2020; 21:4814-4822. [PMID: 32931265 DOI: 10.1021/acs.biomac.0c01030] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Materials for three-dimensional cultures aim to reproduce the function of the extracellular matrix, enabling cell adhesion and growth by remodeling the environment. However, embryonic stem cells (ESCs) must develop in environments that prevent adhesion and preserve their pluripotency. In this study, we used cellulose nanofiber hydrogels to mimic the developing conditions required for ESCs. These plant-based hydrogels are simultaneously biocompatible and exogenous to mammalian cells, preventing remodeling and attachment. The storage modulus of these hydrogels could be fine-tuned by varying the degree of oxidation to enable selective degradation. The ESCs proliferated in the artificial environment, forming increasingly large embryoid bodies for 15 days. Unlike traditional cultures in which ESCs begin differentiating upon the removal of the chemical inhibition, the expression of pluripotency markers in the ESC population remained high for the entire two weeks. Cellulase from Trichoderma reesei was used to retrieve the ESC cultures selectively. The proposed unique system is a prospective model with which to study the early development of embryonic cells, as well as a nonchemical method of preserving undifferentiated populations of ESCs.
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Affiliation(s)
- Rupambika Das
- Singapore University of Technology & Design, 8 Somapah Road, Singapore 487372, Singapore
| | - Javier G Fernandez
- Singapore University of Technology & Design, 8 Somapah Road, Singapore 487372, Singapore
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146
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Eggshell Membrane/Gellan Gum Composite Hydrogels with Increased Degradability, Biocompatibility, and Anti-Swelling Properties for Effective Regeneration of Retinal Pigment Epithelium. Polymers (Basel) 2020; 12:polym12122941. [PMID: 33317040 PMCID: PMC7764595 DOI: 10.3390/polym12122941] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2020] [Revised: 12/07/2020] [Accepted: 12/08/2020] [Indexed: 12/29/2022] Open
Abstract
A gellan gum (GG) hydrogel must demonstrate a number of critical qualities—low viscosity, degradability, desirable mechanical properties, anti-swelling properties, and biocompatibility—in order to be regarded as suitable for retinal pigment epithelium (RPE) regeneration. In this study, we investigated whether the application of an eggshell membrane (ESM) to a GG hydrogel improved these critical attributes. The crosslinking of the ESM/GG hydrogels was most effectively reduced, when a 4 w/v% ESM was used, leading to a 40% less viscosity and a 30% higher degradation efficiency than a pure GG hydrogel. The compressive moduli of the ESM/GG hydrogels were maintained, as the smaller pores formed by the addition of the ESM compensated for the slightly weakened mechanical properties of the ESM/GG hydrogels. Meanwhile, due to the relatively low hydrophilicity of ESM, a 4 w/v% ESM enabled an ESM/GG hydrogel to swell 30% less than a pure GG hydrogel. Finally, the similarity in components between the ESM and RPE cells facilitated the proliferation of the latter without any significant cytotoxicity.
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147
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Dutta SD, Hexiu J, Patel DK, Ganguly K, Lim KT. 3D-printed bioactive and biodegradable hydrogel scaffolds of alginate/gelatin/cellulose nanocrystals for tissue engineering. Int J Biol Macromol 2020; 167:644-658. [PMID: 33285198 DOI: 10.1016/j.ijbiomac.2020.12.011] [Citation(s) in RCA: 84] [Impact Index Per Article: 21.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2020] [Revised: 11/17/2020] [Accepted: 12/02/2020] [Indexed: 02/06/2023]
Abstract
The 3D-printed hybrid biodegradable hydrogels composed of alginate, gelatin, and cellulose nanocrystals (CNCs) were prepared to provide a favorable environment for cell proliferation, adhesion, nutrients exchange, and matrix mineralization for bone tissue engineering (BTE) applications. The hybrid scaffolds exhibited enhanced mechanical strength compared to the pure polymer scaffolds. The biocompatibility, differentiation potential, and bone regeneration potential of the printed scaffolds were evaluated by DAPI staining, live-dead assay, alizarin Red-S (ARS) staining, real-time PCR (qRT-PCR), and μCT analysis, respectively. Enhanced cell proliferation has occurred 1% CNC/Alg/Gel scaffolds compared to the control. The cells were adequately adhered to the scaffold and exhibited the flattened structure. Improved mineralization was observed in the 1% CNC/Alg/Gel scaffolds' presence than the control, showing their mineralization efficiency. A significant enhancement in the expression of osteogenic-specific gene markers (Runx2, ALP, BMP-2, OCN, OPN, BSP, and COL1) has occurred with 1% CNC/Alg/Gel than the control, indicating their osteogenic potential. Furthermore, enhanced bone formation was observed in the scaffolds treated groups than the control in the calvaria critical-sized defects (CCD-1) model, suggesting their improved bone regeneration potential. Therefore, the fabricated scaffolds have the potential to explore as a biomaterial for tissue engineering.
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Affiliation(s)
- Sayan Deb Dutta
- Department of Biosystems Engineering, Kangwon National University, Chuncheon 24341, Republic of Korea
| | - Jin Hexiu
- Department of Plastic and Traumatic Surgery, Capital Medical University, Beijing 100069, China
| | - Dinesh K Patel
- Department of Biosystems Engineering, Kangwon National University, Chuncheon 24341, Republic of Korea
| | - Keya Ganguly
- Department of Biosystems Engineering, Kangwon National University, Chuncheon 24341, Republic of Korea
| | - Ki-Taek Lim
- Department of Biosystems Engineering, Kangwon National University, Chuncheon 24341, Republic of Korea.
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148
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Matichescu A, Ardelean LC, Rusu LC, Craciun D, Bratu EA, Babucea M, Leretter M. Advanced Biomaterials and Techniques for Oral Tissue Engineering and Regeneration-A Review. MATERIALS (BASEL, SWITZERLAND) 2020; 13:E5303. [PMID: 33238625 PMCID: PMC7700200 DOI: 10.3390/ma13225303] [Citation(s) in RCA: 55] [Impact Index Per Article: 13.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/24/2020] [Revised: 11/15/2020] [Accepted: 11/19/2020] [Indexed: 12/11/2022]
Abstract
The reconstruction or repair of oral and maxillofacial functionalities and aesthetics is a priority for patients affected by tooth loss, congenital defects, trauma deformities, or various dental diseases. Therefore, in dental medicine, tissue reconstruction represents a major interest in oral and maxillofacial surgery, periodontics, orthodontics, endodontics, and even daily clinical practice. The current clinical approaches involve a vast array of techniques ranging from the traditional use of tissue grafts to the most innovative regenerative procedures, such as tissue engineering. In recent decades, a wide range of both artificial and natural biomaterials and scaffolds, genes, stem cells isolated from the mouth area (dental follicle, deciduous teeth, periodontal ligament, dental pulp, salivary glands, and adipose tissue), and various growth factors have been tested in tissue engineering approaches in dentistry, with many being proven successful. However, to fully eliminate the problems of traditional bone and tissue reconstruction in dentistry, continuous research is needed. Based on a recent literature review, this paper creates a picture of current innovative strategies applying dental stem cells for tissue regeneration in different dental fields and maxillofacial surgery, and offers detailed information regarding the available scientific data and practical applications.
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Affiliation(s)
- Anamaria Matichescu
- Department of Preventive Dentistry, Community and Oral Health, “Victor Babeș” University of Medicine and Pharmacy Timisoara, 2 Eftimie Murgu Sq., 300041 Timisoara, Romania;
| | - Lavinia Cosmina Ardelean
- Department of Technology of Materials and Devices in Dental Medicine, “Victor Babeș” University of Medicine and Pharmacy Timisoara, 2 Eftimie Murgu Sq., 300041 Timisoara, Romania
| | - Laura-Cristina Rusu
- Department of Oral Pathology, “Victor Babeș” University of Medicine and Pharmacy Timisoara, 2 Eftimie Murgu Sq., 300041 Timisoara, Romania; (L.-C.R.); (D.C.); (M.B.)
| | - Dragos Craciun
- Department of Oral Pathology, “Victor Babeș” University of Medicine and Pharmacy Timisoara, 2 Eftimie Murgu Sq., 300041 Timisoara, Romania; (L.-C.R.); (D.C.); (M.B.)
| | - Emanuel Adrian Bratu
- Department of Implant Supported Restorations, “Victor Babeș” University of Medicine and Pharmacy Timisoara, 2 Eftimie Murgu Sq., 300041 Timisoara, Romania
| | - Marius Babucea
- Department of Oral Pathology, “Victor Babeș” University of Medicine and Pharmacy Timisoara, 2 Eftimie Murgu Sq., 300041 Timisoara, Romania; (L.-C.R.); (D.C.); (M.B.)
| | - Marius Leretter
- Department of Prosthodontics, “Victor Babeș” University of Medicine and Pharmacy Timisoara, 2 Eftimie Murgu Sq., 300041 Timisoara, Romania;
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Afzali L, Mirahmadi-Babaheydari F, Shojaei-Ghahrizjani F, Rahmati S, Shahmoradi B, Banitalebi-Dehkordi M. The Effect of Encapsulated Umbilical Cord-derived Mesenchymal Stem Cells in PRPCryogel on Regeneration of Grade-II Burn Wounds. REGENERATIVE ENGINEERING AND TRANSLATIONAL MEDICINE 2020. [DOI: 10.1007/s40883-020-00188-6] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
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150
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3D Bioprinting of Human Adipose-Derived Stem Cells and Their Tenogenic Differentiation in Clinical-Grade Medium. Int J Mol Sci 2020; 21:ijms21228694. [PMID: 33218011 PMCID: PMC7698777 DOI: 10.3390/ijms21228694] [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: 08/28/2020] [Revised: 11/11/2020] [Accepted: 11/13/2020] [Indexed: 12/20/2022] Open
Abstract
Defining the best combination of cells and biomaterials is a key challenge for the development of tendon tissue engineering (TE) strategies. Adipose-derived stem cells (ASCs) are ideal candidates for this purpose. In addition, controlled cell-based products adherent to good manufacturing practice (GMP) are required for their clinical scale-up. With this aim, in this study, ASC 3D bioprinting and GMP-compliant tenogenic differentiation were investigated. In detail, primary human ASCs were embedded within a nanofibrillar-cellulose/alginate bioink and 3D-bioprinted into multi-layered square-grid matrices. Bioink viscoelastic properties and scaffold ultrastructural morphology were analyzed by rheology and scanning electron microscopy (SEM). The optimal cell concentration for printing among 3, 6 and 9 × 106 ASC/mL was evaluated in terms of cell viability. ASC morphology was characterized by SEM and F-actin immunostaining. Tenogenic differentiation ability was then evaluated in terms of cell viability, morphology and expression of scleraxis and collagen type III by biochemical induction using BMP-12, TGF-β3, CTGF and ascorbic acid supplementation (TENO). Pro-inflammatory cytokine release was also assessed. Bioprinted ASCs showed high viability and survival and exhibited a tenocyte-like phenotype after biochemical induction, with no inflammatory response to the bioink. In conclusion, we report a first proof of concept for the clinical scale-up of ASC 3D bioprinting for tendon TE.
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