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Bovi Dos Santos G, de Lima-Vasconcellos TH, Móvio MI, Birbrair A, Del Debbio CB, Kihara AH. New Perspectives in Stem Cell Transplantation and Associated Therapies to Treat Retinal Diseases: From Gene Editing to 3D Bioprinting. Stem Cell Rev Rep 2024; 20:722-737. [PMID: 38319527 DOI: 10.1007/s12015-024-10689-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 01/29/2024] [Indexed: 02/07/2024]
Abstract
Inherited and non-inherited retinopathies can affect distinct cell types, leading to progressive cell death and visual loss. In the last years, new approaches have indicated exciting opportunities to treat retinopathies. Cell therapy in retinitis pigmentosa, age-related macular disease, and glaucoma have yielded encouraging results in rodents and humans. The first two diseases mainly impact the photoreceptors and the retinal pigmented epithelium, while glaucoma primarily affects the ganglion cell layer. Induced pluripotent stem cells and multipotent stem cells can be differentiated in vitro to obtain specific cell types for use in transplant as well as to assess the impact of candidate molecules aimed at treating retinal degeneration. Moreover, stem cell therapy is presented in combination with newly developed methods, such as gene editing, Müller cells dedifferentiation, sheet & drug delivery, virus-like particles, optogenetics, and 3D bioprinting. This review describes the recent advances in this field, by presenting an updated panel based on cell transplants and related therapies to treat retinopathies.
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Affiliation(s)
- Gabrieli Bovi Dos Santos
- Laboratório de Neurogenética, Universidade Federal do ABC, São Bernardo do Campo, Santo André, SP, Brazil
| | | | - Marília Inês Móvio
- Laboratório de Neurogenética, Universidade Federal do ABC, São Bernardo do Campo, Santo André, SP, Brazil
| | - Alexander Birbrair
- Department of Dermatology, Medical Sciences Center, University of Wisconsin-Madison, Rm 4385, 1300 University Avenue, Madison, WI, 53706, USA
| | - Carolina Beltrame Del Debbio
- Departamento de Biologia Celular e do Desenvolvimento, Instituto de Ciências Biomédicas, Universidade de São Paulo USP, São Paulo, SP, Brazil
| | - Alexandre Hiroaki Kihara
- Laboratório de Neurogenética, Universidade Federal do ABC, São Bernardo do Campo, Santo André, SP, Brazil.
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Hui J, Nie X, Wei P, Deng J, Kang Y, Tang K, Han G, Wang L, Liu W, Han Q. 3D printed fibroblast-loaded hydrogel for scleral remodeling to prevent the progression of myopia. J Mater Chem B 2024; 12:2559-2570. [PMID: 38362614 DOI: 10.1039/d3tb02548a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/17/2024]
Abstract
Pathologic myopia has seriously jeopardized the visual health of adolescents in the past decades. The progression of high myopia is associated with a decrease in collagen aggregation and thinning of the sclera, which ultimately leads to longer eye axis length and image formation in front of the retina. Herein, we report a fibroblast-loaded hydrogel as a posterior scleral reinforcement (PSR) surgery implant for the prevention of myopia progression. The fibroblast-loaded gelatin methacrylate (GelMA)-poly(ethylene glycol) diacrylate (PEGDA) hydrogel was prepared through bioprinting with digital light processing (DLP). The introduction of the PEGDA component endowed the GelMA-PEGDA hydrogel with a high compression modulus for PRS surgery. The encapsulated fibroblasts could consistently maintain a high survival rate during 7 days of in vitro incubation, and could normally secrete collagen type I. Eventually, both the hydrogel and fibroblast-loaded hydrogel demonstrated an effective shortening of the myopic eye axis length in a guinea pig model of visual deprivation over three weeks after implantation, and the sclera thickness of myopic guinea pigs became significantly thicker after 4 weeks, verifying the success of sclera remodeling and showing that myopic progression was effectively controlled. In particular, the fibroblast-loaded hydrogel demonstrated the best therapeutic effect through the synergistic effect of cell therapy and PSR surgery.
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Affiliation(s)
- Jingwen Hui
- Tianjin Eye Hospital, No. 4 Gansu Road, Heping District, Tianjin 300020, China.
- Tianjin Key Lab of Ophthalmology and Visual Science, Tianjin, China
- Clinical College of Ophthalmology Tianjin Medical University, Tianjin Medical University, Tianjin, China
| | - Xiongfeng Nie
- School of Material Science and Engineering, Tianjin Key Laboratory of Composite and Functional Materials, Tianjin University, Tianjin 300350, China
| | - Pinghui Wei
- Tianjin Eye Hospital, No. 4 Gansu Road, Heping District, Tianjin 300020, China.
- Tianjin Key Lab of Ophthalmology and Visual Science, Tianjin, China
- Clinical College of Ophthalmology Tianjin Medical University, Tianjin Medical University, Tianjin, China
| | - Jie Deng
- Tianjin Eye Hospital, No. 4 Gansu Road, Heping District, Tianjin 300020, China.
- Tianjin Key Lab of Ophthalmology and Visual Science, Tianjin, China
- School of Medicine, Nankai University, Tianjin, China
| | - Yuanzhe Kang
- Tianjin Eye Hospital, No. 4 Gansu Road, Heping District, Tianjin 300020, China.
- Tianjin Key Lab of Ophthalmology and Visual Science, Tianjin, China
- Clinical College of Ophthalmology Tianjin Medical University, Tianjin Medical University, Tianjin, China
| | - Kexin Tang
- Tianjin Eye Hospital, No. 4 Gansu Road, Heping District, Tianjin 300020, China.
- Tianjin Key Lab of Ophthalmology and Visual Science, Tianjin, China
- Clinical College of Ophthalmology Tianjin Medical University, Tianjin Medical University, Tianjin, China
| | - Guoge Han
- Tianjin Eye Hospital, No. 4 Gansu Road, Heping District, Tianjin 300020, China.
- Tianjin Key Lab of Ophthalmology and Visual Science, Tianjin, China
- Clinical College of Ophthalmology Tianjin Medical University, Tianjin Medical University, Tianjin, China
| | - Ling Wang
- State Key Laboratory of Medicinal Chemical Biology, College of Pharmacy, Nankai University, Tianjin 300071, China
| | - Wenguang Liu
- School of Material Science and Engineering, Tianjin Key Laboratory of Composite and Functional Materials, Tianjin University, Tianjin 300350, China
| | - Quanhong Han
- Tianjin Eye Hospital, No. 4 Gansu Road, Heping District, Tianjin 300020, China.
- Tianjin Key Lab of Ophthalmology and Visual Science, Tianjin, China
- Clinical College of Ophthalmology Tianjin Medical University, Tianjin Medical University, Tianjin, China
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Nie X, Tang Y, Wu T, Zhao X, Xu Z, Yang R, Sun Y, Wu B, Han Q, Hui J, Liu W. 3D printing sequentially strengthening high-strength natural polymer hydrogel bilayer scaffold for cornea regeneration. Regen Biomater 2024; 11:rbae012. [PMID: 38454966 PMCID: PMC10918636 DOI: 10.1093/rb/rbae012] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2023] [Revised: 01/21/2024] [Accepted: 01/27/2024] [Indexed: 03/09/2024] Open
Abstract
3D printing of high-strength natural polymer biodegradable hydrogel scaffolds simultaneously resembling the biomechanics of corneal tissue and facilitating tissue regeneration remains a huge challenge due to the inherent brittleness of natural polymer hydrogels and the demanding requirements of printing. Herein, concentrated aqueous solutions of gelatin and carbohydrazide-modified alginate (Gel/Alg-CDH) are blended to form a natural polymer hydrogel ink, where the hydrazides in Alg-CDH are found to form strong hydrogen bonds with the gelatin. The hydrogen-bonding-strengthened Gel/Alg-CDH hydrogel demonstrates an appropriate thickened viscosity and shear thinning for extrusion printing. The strong hydrogen bonds contribute to remarkably increased mechanical properties of Gel/Alg-CDH hydrogel with a maximum elongation of over 400%. In addition, sequentially Ca2+-physical crosslinking and then moderately chemical crosslinking significantly enhance the mechanical properties of Gel/Alg-CDH hydrogels that ultimately exhibit an intriguing J-shaped stress-strain curve (tensile strength of 1.068 MPa and the toughness of 677.6 kJ/m2). The dually crosslinked Gel-Alg-CDH-Ca2+-EDC hydrogels demonstrate a high transparency, physiological swelling stability and rapid enzymatic degradability, as well as suturability. The growth factor and drug-loaded biomimetic bilayer hydrogel scaffold are customized via a multi-nozzle printing system. This bioactive bilayer hydrogel scaffold considerably promotes regeneration of corneal epithelium and stroma and inhibits cornea scarring in rabbit cornea keratoplasty.
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Affiliation(s)
- Xiongfeng Nie
- School of Material Science and Engineering, Tianjin Key Laboratory of Composite and Functional Materials, Tianjin University, Tianjin 300350, China
| | - Yong Tang
- Tianjin Eye Hospital, Tianjin Key Lab of Ophthalmology and Visual Science, Tianjin Eye Institute, Tianjin 300020, China
| | - Tengling Wu
- School of Material Science and Engineering, Tianjin Key Laboratory of Composite and Functional Materials, Tianjin University, Tianjin 300350, China
| | - Xinrui Zhao
- School of Material Science and Engineering, Tianjin Key Laboratory of Composite and Functional Materials, Tianjin University, Tianjin 300350, China
| | - Ziyang Xu
- School of Material Science and Engineering, Tianjin Key Laboratory of Composite and Functional Materials, Tianjin University, Tianjin 300350, China
| | - Rong Yang
- School of Material Science and Engineering, Tianjin Key Laboratory of Composite and Functional Materials, Tianjin University, Tianjin 300350, China
| | - Yage Sun
- School of Material Science and Engineering, Tianjin Key Laboratory of Composite and Functional Materials, Tianjin University, Tianjin 300350, China
| | - Bin Wu
- Tianjin Eye Hospital, Tianjin Key Lab of Ophthalmology and Visual Science, Tianjin Eye Institute, Tianjin 300020, China
| | - Quanhong Han
- Tianjin Eye Hospital, Tianjin Key Lab of Ophthalmology and Visual Science, Tianjin Eye Institute, Tianjin 300020, China
| | - Jingwen Hui
- Tianjin Eye Hospital, Tianjin Key Lab of Ophthalmology and Visual Science, Tianjin Eye Institute, Tianjin 300020, China
| | - Wenguang Liu
- School of Material Science and Engineering, Tianjin Key Laboratory of Composite and Functional Materials, Tianjin University, Tianjin 300350, China
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Chi M, Yuan B, Xie Z, Hong J. The Innovative Biomaterials and Technologies for Developing Corneal Endothelium Tissue Engineering Scaffolds: A Review and Prospect. Bioengineering (Basel) 2023; 10:1284. [PMID: 38002407 PMCID: PMC10669703 DOI: 10.3390/bioengineering10111284] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2023] [Revised: 10/21/2023] [Accepted: 10/30/2023] [Indexed: 11/26/2023] Open
Abstract
Corneal transplantation is the only treatment for corneal endothelial blindness. However, there is an urgent need to find substitutes for corneal endothelium grafts due to the global shortage of donor corneas. An emerging research field focuses on the construction of scaffold-based corneal endothelium tissue engineering (CETE). Long-term success in CETE transplantation may be achieved by selecting the appropriate biomaterials as scaffolds of corneal endothelial cells and adding bioactive materials to promote cell activity. This article reviews the research progress of CETE biomaterials in the past 20 years, describes the key characteristics required for corneal endothelial scaffolds, and summarizes the types of materials that have been reported. Based on these, we list feasible improvement strategies for biomaterials innovation. In addition, we describe the improved techniques for the scaffolds' surface topography and drug delivery system. Some promising technologies for constructing CETE are proposed. However, some questions have not been answered yet, and clinical trials and industrialization should be carried out with caution.
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Affiliation(s)
- Miaomiao Chi
- Department of Ophthalmology, Peking University Third Hospital, Beijing 100191, China; (M.C.); (B.Y.); (Z.X.)
- Key Laboratory of Vision Loss and Restoration, Ministry of Education, Beijing 100191, China
| | - Bowei Yuan
- Department of Ophthalmology, Peking University Third Hospital, Beijing 100191, China; (M.C.); (B.Y.); (Z.X.)
- Key Laboratory of Vision Loss and Restoration, Ministry of Education, Beijing 100191, China
| | - Zijun Xie
- Department of Ophthalmology, Peking University Third Hospital, Beijing 100191, China; (M.C.); (B.Y.); (Z.X.)
- Key Laboratory of Vision Loss and Restoration, Ministry of Education, Beijing 100191, China
| | - Jing Hong
- Department of Ophthalmology, Peking University Third Hospital, Beijing 100191, China; (M.C.); (B.Y.); (Z.X.)
- Key Laboratory of Vision Loss and Restoration, Ministry of Education, Beijing 100191, China
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5
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Al-Atawi S. Three-dimensional bioprinting in ophthalmic care. Int J Ophthalmol 2023; 16:1702-1711. [PMID: 37854366 PMCID: PMC10559024 DOI: 10.18240/ijo.2023.10.21] [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: 01/19/2023] [Accepted: 05/04/2023] [Indexed: 10/20/2023] Open
Abstract
Three-dimensional (3D) bioprinting is widely used in ophthalmic clinic, including in diagnosis, surgery, prosthetics, medications, drug development and delivery, and medical education. Articles published in 2011-2022 into bioinks, printing technologies, and bioprinting applications in ophthalmology were reviewed and the strengths and limitations of bioprinting in ophthalmology highlighted. The review highlighted the trade-offs of printing technologies and bioinks in respect to, among others, material type cost, throughput, gelation technique, cell density, cell viability, resolution, and printing speed. There is already widespread ophthalmological application of bioprinting outside clinical settings, including in educational modelling, retinal imaging/visualization techniques and drug design/testing. In clinical settings, bioprinting has already found application in pre-operatory planning. Even so, the findings showed that even with its immense promise, actual translation to clinical applications remains distant, but relatively closer for the corneal (except stromal) tissues, epithelium, endothelium, and conjunctiva, than it was for the retina. This review similarly reflected on the critical on the technical, practical, ethical, and cost barrier to rapid progress of bioprinting in ophthalmology, including accessibility to the most sophisticated bioprinting technologies, choice, and suitability of bioinks, tissue viability and storage conditions. The extant research is encouraging, but more work is clearly required for the push towards clinical translation of research.
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Affiliation(s)
- Saleha Al-Atawi
- Al-baha University, Applied Medical Science, Al-Aqiaq, AlBaha 4781, Saudi Arabia
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Boix-Lemonche G, Nagymihaly RM, Niemi EM, Josifovska N, Johansen S, Moe MC, Scholz H, Petrovski G. Intracorneal Implantation of 3D Bioprinted Scaffolds Containing Mesenchymal Stromal Cells Using Femtosecond-Laser-Assisted Intrastromal Keratoplasty. Macromol Biosci 2023; 23:e2200422. [PMID: 36729619 DOI: 10.1002/mabi.202200422] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2022] [Revised: 12/27/2022] [Indexed: 02/03/2023]
Abstract
Injury of the cornea is a complex biological process. Regeneration of the corneal stroma can be facilitated by the presence of mesenchymal stromal cells (MSCs) and application of tissue equivalents. A new tissue-engineering strategy for corneal stroma regeneration is presented using cellularized 3D bioprinted hydrogel constructs implanted into organ cultured porcine corneas using femtosecond laser-assisted intrastromal keratoplasty. The ex vivo cultured, MSC-loaded 3D bioprinted structures remain intact, support cell survival, and contain de novo synthesized extracellular matrix components and migrating cells throughout the observation period. At day 14 postimplantation, the cellularized tissue equivalents contain few or no cells, as demonstrated by optical coherence tomography imaging and immunofluorescent staining. This study successfully combines a laboratory-based method with modern, patient-care practice to produce a cell-laden tissue equivalent for corneal implantation. Optimal bioink composition and cellularization of tissue equivalents are essential in fine-tuning a method to promote the current technique as a future treatment modality.
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Affiliation(s)
- Gerard Boix-Lemonche
- Center for Eye Research and Innovative Diagnostics, Department of Ophthalmology, Institute of Clinical Medicine, Faculty of Medicine, University of Oslo, Oslo, 0450, Norway
| | | | - Essi M Niemi
- Vascular Biology and Surgery Group, Institute for Surgical Research and Department of Vascular Surgery, Oslo University Hospital, Post Box 4950, Oslo, Nydalen, N-0424, Norway
- Hybrid Technology Hub, Centre of Excellence, Institute of Basic Medical Sciences, University of Oslo, Oslo, 0349, Norway
| | - Natasha Josifovska
- Center for Eye Research and Innovative Diagnostics, Department of Ophthalmology, Institute of Clinical Medicine, Faculty of Medicine, University of Oslo, Oslo, 0450, Norway
| | | | - Morten C Moe
- Center for Eye Research and Innovative Diagnostics, Department of Ophthalmology, Institute of Clinical Medicine, Faculty of Medicine, University of Oslo, Oslo, 0450, Norway
- Department of Ophthalmology, Oslo University Hospital, Oslo, 0450, Norway
| | - Hanne Scholz
- Hybrid Technology Hub, Centre of Excellence, Institute of Basic Medical Sciences, University of Oslo, Oslo, 0349, Norway
- Cell Transplantation and Tissue Engineering Group, Institute for Surgical Research and Section for Transplant Surgery, Oslo University Hospital, Post Box 4950, Oslo, Nydalen, N-0424, Norway
| | - Goran Petrovski
- Center for Eye Research and Innovative Diagnostics, Department of Ophthalmology, Institute of Clinical Medicine, Faculty of Medicine, University of Oslo, Oslo, 0450, Norway
- Department of Ophthalmology, Oslo University Hospital, Oslo, 0450, Norway
- Department of Ophthalmology, University of Split School of Medicine and University Hospital Centre, Split, Croatia
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Zhang M, Yang F, Han D, Zhang SY, Dong Y, Li X, Ling L, Deng Z, Cao X, Tian J, Ye Q, Wang Y. 3D bioprinting of corneal decellularized extracellular matrix: GelMA composite hydrogel for corneal stroma engineering. Int J Bioprint 2023; 9:774. [PMID: 37555081 PMCID: PMC10406171 DOI: 10.18063/ijb.774] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2023] [Accepted: 04/27/2023] [Indexed: 08/10/2023] Open
Abstract
Millions of individuals across the world suffer from corneal stromal diseases that impair vision. Fortunately, three-dimensional (3D) bioprinting technology which has revolutionized the field of regenerative tissue engineering makes it feasible to create personalized corneas. In this study, an artificial cornea with a high degree of precision, smoothness, and programmable curvature was prepared by using digital light processing (DLP) 3D bioprinting in one piece with no support structure, and the construct was then confirmed by optical coherence tomography (OCT). On the basis of this approach, we developed a novel corneal decellularized extracellular matrix/gelatin methacryloyl (CECM-GelMA) bioink that can produce complex microenvironments with highly tunable mechanical properties while retaining high optical transmittance. Furthermore, the composite hydrogel was loaded with human corneal fibroblasts (hCFs), and in vitro experiments showed that the hydrogel maintained high cell viability and expressed core proteins. In vivo tests revealed that the hydrogel might promote epithelial regeneration, keep the matrix aligned, and restore clarity. This demonstrates how crucial a role CECM plays in establishing a favorable environment that encourages the transformation of cell function. Therefore, artificial corneas that can be rapidly customized have a huge potential in the development of in vitro corneal matrix analogs.
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Affiliation(s)
- Mingshan Zhang
- Key Laboratory of Weak-Light Nonlinear Photonics, Ministry
of Education, School of Physics and TEDA Applied Physics, Nankai University,
Tianjin, China
- Institute of Modern Optics, Eye Institute, Nankai
University, Tianjin, China
- Nankai University Eye Institute, Nankai University
Afflicted Eye Hospital, Nankai University, Tianjin, China
| | - Fang Yang
- Clinical College of Ophthalmology, Tianjin Medical
University, Tianjin, China
- Department of Ophthalmology, Renmin Hospital, Hubei
University of Medicine, Shiyan, China
| | - Daobo Han
- Key Laboratory of Weak-Light Nonlinear Photonics, Ministry
of Education, School of Physics and TEDA Applied Physics, Nankai University,
Tianjin, China
| | - Shi-yao Zhang
- Clinical College of Ophthalmology, Tianjin Medical
University, Tianjin, China
| | - Yipeng Dong
- Key Laboratory of Weak-Light Nonlinear Photonics, Ministry
of Education, School of Physics and TEDA Applied Physics, Nankai University,
Tianjin, China
| | - Xinyu Li
- Clinical College of Ophthalmology, Tianjin Medical
University, Tianjin, China
| | - Liyun Ling
- Clinical College of Ophthalmology, Tianjin Medical
University, Tianjin, China
| | - Zhichao Deng
- Key Laboratory of Weak-Light Nonlinear Photonics, Ministry
of Education, School of Physics and TEDA Applied Physics, Nankai University,
Tianjin, China
| | - Xuewei Cao
- Key Laboratory of Weak-Light Nonlinear Photonics, Ministry
of Education, School of Physics and TEDA Applied Physics, Nankai University,
Tianjin, China
| | - Jianguo Tian
- Key Laboratory of Weak-Light Nonlinear Photonics, Ministry
of Education, School of Physics and TEDA Applied Physics, Nankai University,
Tianjin, China
| | - Qing Ye
- Key Laboratory of Weak-Light Nonlinear Photonics, Ministry
of Education, School of Physics and TEDA Applied Physics, Nankai University,
Tianjin, China
- Nankai University Eye Institute, Nankai University
Afflicted Eye Hospital, Nankai University, Tianjin, China
| | - Yan Wang
- Clinical College of Ophthalmology, Tianjin Medical
University, Tianjin, China
- Tianjin Eye Hospital and Nankai University Eye Institute,
Tianjin Key Lab of Ophthalmology and Visual Science, Tianjin Eye Institute, Nankai
University Affiliated Eye Hospital, Nankai University, Tianjin, China
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Stealey ST, Gaharwar AK, Zustiak SP. Laponite-Based Nanocomposite Hydrogels for Drug Delivery Applications. Pharmaceuticals (Basel) 2023; 16:821. [PMID: 37375768 DOI: 10.3390/ph16060821] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2023] [Revised: 05/26/2023] [Accepted: 05/29/2023] [Indexed: 06/29/2023] Open
Abstract
Hydrogels are widely used for therapeutic delivery applications due to their biocompatibility, biodegradability, and ability to control release kinetics by tuning swelling and mechanical properties. However, their clinical utility is hampered by unfavorable pharmacokinetic properties, including high initial burst release and difficulty in achieving prolonged release, especially for small molecules (<500 Da). The incorporation of nanomaterials within hydrogels has emerged as viable option as a method to trap therapeutics within the hydrogel and sustain release kinetics. Specifically, two-dimensional nanosilicate particles offer a plethora of beneficial characteristics, including dually charged surfaces, degradability, and enhanced mechanical properties within hydrogels. The nanosilicate-hydrogel composite system offers benefits not obtainable by just one component, highlighting the need for detail characterization of these nanocomposite hydrogels. This review focuses on Laponite, a disc-shaped nanosilicate with diameter of 30 nm and thickness of 1 nm. The benefits of using Laponite within hydrogels are explored, as well as examples of Laponite-hydrogel composites currently being investigated for their ability to prolong the release of small molecules and macromolecules such as proteins. Future work will further characterize the interplay between nanosilicates, hydrogel polymer, and encapsulated therapeutics, and how each of these components affect release kinetics and mechanical properties.
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Affiliation(s)
- Samuel T Stealey
- Department of Biomedical Engineering, Saint Louis University, Saint Louis, MO 63103, USA
| | - Akhilesh K Gaharwar
- Department of Biomedical Engineering, Texas A&M University, College Station, TX 77433, USA
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Nomicisio C, Ruggeri M, Bianchi E, Vigani B, Valentino C, Aguzzi C, Viseras C, Rossi S, Sandri G. Natural and Synthetic Clay Minerals in the Pharmaceutical and Biomedical Fields. Pharmaceutics 2023; 15:pharmaceutics15051368. [PMID: 37242610 DOI: 10.3390/pharmaceutics15051368] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2023] [Revised: 03/31/2023] [Accepted: 04/26/2023] [Indexed: 05/28/2023] Open
Abstract
Clay minerals are historically among the most used materials with a wide variety of applications. In pharmaceutical and biomedical fields, their healing properties have always been known and used in pelotherapy and therefore attractive for their potential. In recent decades, the research has therefore focused on the systematic investigation of these properties. This review aims to describe the most relevant and recent uses of clays in the pharmaceutical and biomedical field, especially for drug delivery and tissue engineering purposes. Clay minerals, which are biocompatible and non-toxic materials, can act as carriers for active ingredients while controlling their release and increasing their bioavailability. Moreover, the combination of clays and polymers is useful as it can improve the mechanical and thermal properties of polymers, as well as induce cell adhesion and proliferation. Different types of clays, both of natural (such as montmorillonite and halloysite) and synthetic origin (layered double hydroxides and zeolites), were considered in order to compare them and to assess their advantages and different uses.
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Affiliation(s)
- Cristian Nomicisio
- Department of Drug Sciences, University of Pavia, Viale Taramelli 12, 27100 Pavia, Italy
| | - Marco Ruggeri
- Department of Drug Sciences, University of Pavia, Viale Taramelli 12, 27100 Pavia, Italy
| | - Eleonora Bianchi
- Department of Drug Sciences, University of Pavia, Viale Taramelli 12, 27100 Pavia, Italy
| | - Barbara Vigani
- Department of Drug Sciences, University of Pavia, Viale Taramelli 12, 27100 Pavia, Italy
| | - Caterina Valentino
- Department of Drug Sciences, University of Pavia, Viale Taramelli 12, 27100 Pavia, Italy
| | - Carola Aguzzi
- Department of Pharmacy and Pharmaceutical Technology, University of Granada, Cartuja Campus, 18071 Granada, Spain
| | - Cesar Viseras
- Department of Pharmacy and Pharmaceutical Technology, University of Granada, Cartuja Campus, 18071 Granada, Spain
| | - Silvia Rossi
- Department of Drug Sciences, University of Pavia, Viale Taramelli 12, 27100 Pavia, Italy
| | - Giuseppina Sandri
- Department of Drug Sciences, University of Pavia, Viale Taramelli 12, 27100 Pavia, Italy
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10
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Laspro M, Chaya BF, Brydges HT, Dave N, Thys E, Onuh OC, Tran D, Kimberly LL, Ceradini DJ, Rodriguez ED. Technical Feasibility of Whole-eye Vascular Composite Allotransplantation: A Systematic Review. PLASTIC AND RECONSTRUCTIVE SURGERY-GLOBAL OPEN 2023; 11:e4946. [PMID: 37113307 PMCID: PMC10129168 DOI: 10.1097/gox.0000000000004946] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2022] [Accepted: 02/22/2023] [Indexed: 04/29/2023]
Abstract
There are over 43 million individuals in the world who are blind. As retinal ganglion cells are incapable of regeneration, treatment modalities for this condition are limited. Since first incepted in 1885, whole-eye transplantation (WET) has been proposed as the ultimate cure for blindness. As the field evolves, different aspects of the surgery have been individually explored, including allograft viability, retinal survival, and optic nerve regeneration. Due to the paucity in the WET literature, we aimed to systematically review proposed WET surgical techniques to assess surgical feasibility. Additionally, we hope to identify barriers to future clinical application and potential ethical concerns that could be raised with surgery. Methods We conducted a systematic review of PubMed, Embase, Cochrane Library, and Scopus from inception to June 10, 2022, to identify articles pertaining to WET. Data collection included model organisms studied, surgical techniques utilized, and postoperative functional outcomes. Results Our results yielded 33 articles, including 14 mammalian and 19 cold-blooded models. In studies performing microvascular anastomosis in mammals, 96% of allografts survived after surgery. With nervous coaptation, 82.9% of retinas had positive electroretinogram signals after surgery, indicating functional retinal cells after transplantation. Results on optic nerve function were inconclusive. Ocular-motor functionality was rarely addressed. Conclusions Regarding allograft survival, WET appears feasible with no complications to the recipient recorded in previous literature. Functional restoration is potentially achievable with a demonstrated positive retinal survival in live models. Nevertheless, the potential of optic nerve regeneration remains undetermined.
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Affiliation(s)
- Matteo Laspro
- From the Hansjörg Wyss Department of Plastic Surgery, NYU Grossman School of Medicine, New York, N.Y
| | - Bachar F. Chaya
- From the Hansjörg Wyss Department of Plastic Surgery, NYU Grossman School of Medicine, New York, N.Y
| | - Hilliard T. Brydges
- From the Hansjörg Wyss Department of Plastic Surgery, NYU Grossman School of Medicine, New York, N.Y
| | - Nikhil Dave
- From the Hansjörg Wyss Department of Plastic Surgery, NYU Grossman School of Medicine, New York, N.Y
| | - Erika Thys
- From the Hansjörg Wyss Department of Plastic Surgery, NYU Grossman School of Medicine, New York, N.Y
| | - Ogechukwu C. Onuh
- From the Hansjörg Wyss Department of Plastic Surgery, NYU Grossman School of Medicine, New York, N.Y
| | - David Tran
- From the Hansjörg Wyss Department of Plastic Surgery, NYU Grossman School of Medicine, New York, N.Y
| | - Laura L. Kimberly
- From the Hansjörg Wyss Department of Plastic Surgery, NYU Grossman School of Medicine, New York, N.Y
- Department of Population Health, NYU Grossman School of Medicine, New York, N.Y
| | - Daniel J. Ceradini
- From the Hansjörg Wyss Department of Plastic Surgery, NYU Grossman School of Medicine, New York, N.Y
| | - Eduardo D. Rodriguez
- From the Hansjörg Wyss Department of Plastic Surgery, NYU Grossman School of Medicine, New York, N.Y
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11
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3D Bioprinting with Live Cells. ENGINEERED REGENERATION 2022. [DOI: 10.1016/j.engreg.2022.07.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
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12
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Progress in 3D Bioprinting Technology for Osteochondral Regeneration. Pharmaceutics 2022; 14:pharmaceutics14081578. [PMID: 36015207 PMCID: PMC9414312 DOI: 10.3390/pharmaceutics14081578] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2022] [Revised: 07/22/2022] [Accepted: 07/28/2022] [Indexed: 12/20/2022] Open
Abstract
Osteochondral injuries can lead to osteoarthritis (OA). OA is characterized by the progressive degradation of the cartilage tissue together with bone tissue turnover. Consequently, joint pain, inflammation, and stiffness are common, with joint immobility and dysfunction being the most severe symptoms. The increase in the age of the population, along with the increase in risk factors such as obesity, has led OA to the forefront of disabling diseases. In addition, it not only has an increasing prevalence, but is also an economic burden for health systems. Current treatments are focused on relieving pain and inflammation, but they become ineffective as the disease progresses. Therefore, new therapeutic approaches, such as tissue engineering and 3D bioprinting, have emerged. In this review, the advantages of using 3D bioprinting techniques for osteochondral regeneration are described. Furthermore, the biomaterials, cell types, and active molecules that are commonly used for these purposes are indicated. Finally, the most recent promising results for the regeneration of cartilage, bone, and/or the osteochondral unit through 3D bioprinting technologies are considered, as this could be a feasible therapeutic approach to the treatment of OA.
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13
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Menon A, Vijayavenkataraman S. Novel vision restoration techniques: 3D bioprinting, gene and stem cell therapy, optogenetics, and the bionic eye. Artif Organs 2022; 46:1463-1474. [PMID: 35373344 DOI: 10.1111/aor.14241] [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: 02/03/2022] [Revised: 03/18/2022] [Accepted: 03/18/2022] [Indexed: 11/29/2022]
Abstract
BACKGROUND Vision restoration has been one of the most sought-after goals of ophthalmology because of its inception. Despite these problems being tackled from numerous different perspectives, a concrete solution has not yet been achieved. An optimal solution will have significant implications on the patient's quality of life, socioeconomic status, and mental health. METHODS This article will explore new and innovative approaches with one common aim-to restore functional vision for the visually impaired. These novel techniques include 3D bioprinting, stem cell therapy, gene therapy, implantable devices, and optogenetics. RESULTS While the techniques mentioned above show significant promise, they are currently in various stages of development ranging from clinical trials to commercial availability. Restoration of minimal vision in specific cases has already been achieved by the different methods but optimization of different parameters like biocompatibility, spatiotemporal resolution, and minimizing the costs are essential for widespread use. CONCLUSION The developments over the past decade have resulted in multiple milestones in each of the techniques with many solutions getting approved by the FDA. This article will compare these novel techniques and highlight the major advantages and drawbacks of each of them.
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Affiliation(s)
- Abhay Menon
- The Vijay Lab, Division of Engineering, New York University Abu Dhabi, Abu Dhabi, United Arab Emirates
| | - Sanjairaj Vijayavenkataraman
- The Vijay Lab, Division of Engineering, New York University Abu Dhabi, Abu Dhabi, United Arab Emirates.,Department of Mechanical and Aerospace Engineering, Tandon School of Engineering, New York University, Brooklyn, New York, USA
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14
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Kang D, Liu Z, Qian C, Huang J, Zhou Y, Mao X, Qu Q, Liu B, Wang J, Hu Z, Miao Y. 3D bioprinting of a gelatin-alginate hydrogel for tissue-engineered hair follicle regeneration. Acta Biomater 2022:S1742-7061(22)00142-8. [PMID: 35288311 DOI: 10.1016/j.actbio.2022.03.011] [Citation(s) in RCA: 27] [Impact Index Per Article: 13.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2021] [Revised: 03/02/2022] [Accepted: 03/07/2022] [Indexed: 02/07/2023]
Abstract
Hair follicle (HF) regeneration remains challenging, principally due to the absence of a platform that can successfully generate the microenvironmental cues of hair neogenesis. Here, we demonstrate a 3D bioprinting technique based on a gelatin/alginate hydrogel (GAH) to construct a multilayer composite scaffold simulating the HF microenvironment in vivo. Fibroblasts (FBs), human umbilical vein endothelial cells (HUVECs), dermal papilla cells (DPCs), and epidermal cells (EPCs) were encapsulated in GAH (prepared from a mixture of gelatin and alginate) and respectively 3D-bioprinted into the different layers of a composite scaffold. The bioprinted scaffold with epidermis- and dermis-like structure was subsequently transplanted into full-thickness wounds in nude mice. The multilayer scaffold demonstrated suitable cytocompatibility and increased the proliferation ability of DPCs (1.2-fold; P < 0.05). It also facilitated the formation of self-aggregating DPC spheroids and restored DPC genes associated with hair induction (ALP, β-catenin, and α-SMA). The dermal and epidermal cells self-assembled successfully into immature HFs in vitro. HFs were regenerated in the appropriate orientation in vivo, which can mainly be attributed to the hierarchical grid structure of the scaffold and the dot bioprinting of DPCs. Our 3D printed scaffolds provide a suitable microenvironment for DPCs to regenerate entire HFs and could make a significant contribution in the medical management of hair loss. This method may also have broader applications in skin tissue (and appendage) engineering. STATEMENT OF SIGNIFICANCE: Hair loss remains a challenging clinical problem that influences quality of life. Three-dimensional (3D) bioprinting has become a useful tool for the fabrication of tissue constructs for transplantation and other biomedical applications. In this study, we used a 3D bioprinting technique based on a gelatin/alginate hydrogel to construct a multi-layer composite scaffold with cuticular and corium layers to simulate the microenvironment of dermal papilla cells (DPCs) in the human body. This new approach permits the controllable formation of self-aggregating spheroids of DPCs in a physiologically relevant extracellular matrix and the initiation of epidermal-mesenchymal interactions, which results in HF formation in vivo. The ability to regenerate entire HFs should have a significant impact on the medical management of hair loss.
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15
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It is time for a moonshot to find “Cures” for diabetic retinal disease. Prog Retin Eye Res 2022; 90:101051. [DOI: 10.1016/j.preteyeres.2022.101051] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2021] [Revised: 01/19/2022] [Accepted: 01/31/2022] [Indexed: 12/13/2022]
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16
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Marcos LF, Wilson SL, Roach P. Tissue engineering of the retina: from organoids to microfluidic chips. J Tissue Eng 2021; 12:20417314211059876. [PMID: 34917332 PMCID: PMC8669127 DOI: 10.1177/20417314211059876] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2021] [Accepted: 10/28/2021] [Indexed: 12/29/2022] Open
Abstract
Despite advancements in tissue engineering, challenges remain for fabricating functional tissues that incorporate essential features including vasculature and complex cellular organisation. Monitoring of engineered tissues also raises difficulties, particularly when cell population maturity is inherent to function. Microfluidic, or lab-on-a-chip, platforms address the complexity issues of conventional 3D models regarding cell numbers and functional connectivity. Regulation of biochemical/biomechanical conditions can create dynamic structures, providing microenvironments that permit tissue formation while quantifying biological processes at a single cell level. Retinal organoids provide relevant cell numbers to mimic in vivo spatiotemporal development, where conventional culture approaches fail. Modern bio-fabrication techniques allow for retinal organoids to be combined with microfluidic devices to create anato-physiologically accurate structures or ‘retina-on-a-chip’ devices that could revolution ocular sciences. Here we present a focussed review of retinal tissue engineering, examining the challenges and how some of these have been overcome using organoids, microfluidics, and bioprinting technologies.
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Affiliation(s)
- Luis F Marcos
- Department of Chemistry, School of Science, Loughborough University, Leicestershire, UK
| | - Samantha L Wilson
- Centre for Biological Engineering, School of Mechanical, Electrical and Manufacturing Engineering, Loughborough University, Leicestershire, UK
| | - Paul Roach
- Department of Chemistry, School of Science, Loughborough University, Leicestershire, UK
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17
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Larochelle RD, Mann SE, Ifantides C. 3D Printing in Eye Care. Ophthalmol Ther 2021; 10:733-752. [PMID: 34327669 PMCID: PMC8320416 DOI: 10.1007/s40123-021-00379-6] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2021] [Accepted: 07/19/2021] [Indexed: 12/24/2022] Open
Abstract
Three-dimensional printing enables precise modeling of anatomical structures and has been employed in a broad range of applications across medicine. Its earliest use in eye care included orbital models for training and surgical planning, which have subsequently enabled the design of custom-fit prostheses in oculoplastic surgery. It has evolved to include the production of surgical instruments, diagnostic tools, spectacles, and devices for delivery of drug and radiation therapy. During the COVID-19 pandemic, increased demand for personal protective equipment and supply chain shortages inspired many institutions to 3D-print their own eye protection. Cataract surgery, the most common procedure performed worldwide, may someday make use of custom-printed intraocular lenses. Perhaps its most alluring potential resides in the possibility of printing tissues at a cellular level to address unmet needs in the world of corneal and retinal diseases. Early models toward this end have shown promise for engineering tissues which, while not quite ready for transplantation, can serve as a useful model for in vitro disease and therapeutic research. As more institutions incorporate in-house or outsourced 3D printing for research models and clinical care, ethical and regulatory concerns will become a greater consideration. This report highlights the uses of 3D printing in eye care by subspecialty and clinical modality, with an aim to provide a useful entry point for anyone seeking to engage with the technology in their area of interest.
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Affiliation(s)
- Ryan D Larochelle
- Department of Ophthalmology, University of Colorado, Sue Anschutz-Rodgers Eye Center, 1675 Aurora Court, F731, Aurora, CO, 80045, USA
| | - Scott E Mann
- Department of Otolaryngology, University of Colorado, Aurora, CO, USA
- Department of Surgery, Denver Health Medical Center, Denver, CO, USA
| | - Cristos Ifantides
- Department of Ophthalmology, University of Colorado, Sue Anschutz-Rodgers Eye Center, 1675 Aurora Court, F731, Aurora, CO, 80045, USA.
- Department of Surgery, Denver Health Medical Center, Denver, CO, USA.
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18
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Diebold Y, García-Posadas L. Advanced Therapy Medicinal Products for Eye Diseases: Goals and Challenges. Pharmaceutics 2021; 13:pharmaceutics13111819. [PMID: 34834234 PMCID: PMC8621516 DOI: 10.3390/pharmaceutics13111819] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2021] [Accepted: 10/25/2021] [Indexed: 11/16/2022] Open
Affiliation(s)
- Yolanda Diebold
- Ocular Surface Group, Instituto de Oftalmobiología Aplicada (IOBA), Universidad de Valladolid, 47011 Valladolid, Spain;
- Centro de Investigación Biomédica en Red de Bioingeniería, Biomateriales y Nanomedicina (CIBER-BBN), Instituto de Salud Carlos III, 28029 Madrid, Spain
- Correspondence:
| | - Laura García-Posadas
- Ocular Surface Group, Instituto de Oftalmobiología Aplicada (IOBA), Universidad de Valladolid, 47011 Valladolid, Spain;
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19
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Di Piazza E, Pandolfi E, Cacciotti I, Del Fattore A, Tozzi AE, Secinaro A, Borro L. Bioprinting Technology in Skin, Heart, Pancreas and Cartilage Tissues: Progress and Challenges in Clinical Practice. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2021; 18:ijerph182010806. [PMID: 34682564 PMCID: PMC8535210 DOI: 10.3390/ijerph182010806] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/03/2021] [Revised: 09/29/2021] [Accepted: 10/08/2021] [Indexed: 12/16/2022]
Abstract
Bioprinting is an emerging additive manufacturing technique which shows an outstanding potential for shaping customized functional substitutes for tissue engineering. Its introduction into the clinical space in order to replace injured organs could ideally overcome the limitations faced with allografts. Presently, even though there have been years of prolific research in the field, there is a wide gap to bridge in order to bring bioprinting from "bench to bedside". This is due to the fact that bioprinted designs have not yet reached the complexity required for clinical use, nor have clear GMP (good manufacturing practices) rules or precise regulatory guidelines been established. This review provides an overview of some of the most recent and remarkable achievements for skin, heart, pancreas and cartilage bioprinting breakthroughs while highlighting the critical shortcomings for each tissue type which is keeping this technique from becoming widespread reality.
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Affiliation(s)
- Eleonora Di Piazza
- Multifactorial and Complex Disease Research Area, Preventive and Predictive Medicine Unit, Bambino Gesù Children’s Hospital, IRCCS, 00146 Rome, Italy; (E.D.P.); (A.E.T.)
| | - Elisabetta Pandolfi
- Multifactorial and Complex Disease Research Area, Preventive and Predictive Medicine Unit, Bambino Gesù Children’s Hospital, IRCCS, 00146 Rome, Italy; (E.D.P.); (A.E.T.)
- Correspondence:
| | - Ilaria Cacciotti
- Engineering Department, Niccolò Cusano University of Rome, INSTM RU, 00166 Rome, Italy;
| | - Andrea Del Fattore
- Genetics and Rare Diseases Research Area, Bone Physiopathology Research Unit, Bambino Gesù Children’s Hospital, IRCCS, 00146 Rome, Italy;
| | - Alberto Eugenio Tozzi
- Multifactorial and Complex Disease Research Area, Preventive and Predictive Medicine Unit, Bambino Gesù Children’s Hospital, IRCCS, 00146 Rome, Italy; (E.D.P.); (A.E.T.)
| | - Aurelio Secinaro
- Clinical Management and Technological Innovations Area, Department of Imaging, Bambino Gesù Children’s Hospital, IRCCS, 00146 Rome, Italy; (A.S.); (L.B.)
| | - Luca Borro
- Clinical Management and Technological Innovations Area, Department of Imaging, Bambino Gesù Children’s Hospital, IRCCS, 00146 Rome, Italy; (A.S.); (L.B.)
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20
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Hidalgo-Alvarez V, Dhowre HS, Kingston OA, Sheridan CM, Levis HJ. Biofabrication of Artificial Stem Cell Niches in the Anterior Ocular Segment. Bioengineering (Basel) 2021; 8:135. [PMID: 34677208 PMCID: PMC8533470 DOI: 10.3390/bioengineering8100135] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2021] [Revised: 09/27/2021] [Accepted: 09/27/2021] [Indexed: 11/16/2022] Open
Abstract
The anterior segment of the eye is a complex set of structures that collectively act to maintain the integrity of the globe and direct light towards the posteriorly located retina. The eye is exposed to numerous physical and environmental insults such as infection, UV radiation, physical or chemical injuries. Loss of transparency to the cornea or lens (cataract) and dysfunctional regulation of intra ocular pressure (glaucoma) are leading causes of worldwide blindness. Whilst traditional therapeutic approaches can improve vision, their effect often fails to control the multiple pathological events that lead to long-term vision loss. Regenerative medicine approaches in the eye have already had success with ocular stem cell therapy and ex vivo production of cornea and conjunctival tissue for transplant recovering patients' vision. However, advancements are required to increase the efficacy of these as well as develop other ocular cell therapies. One of the most important challenges that determines the success of regenerative approaches is the preservation of the stem cell properties during expansion culture in vitro. To achieve this, the environment must provide the physical, chemical and biological factors that ensure the maintenance of their undifferentiated state, as well as their proliferative capacity. This is likely to be accomplished by replicating the natural stem cell niche in vitro. Due to the complex nature of the cell microenvironment, the creation of such artificial niches requires the use of bioengineering techniques which can replicate the physico-chemical properties and the dynamic cell-extracellular matrix interactions that maintain the stem cell phenotype. This review discusses the progress made in the replication of stem cell niches from the anterior ocular segment by using bioengineering approaches and their therapeutic implications.
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Affiliation(s)
- Veronica Hidalgo-Alvarez
- Institute of Biological Chemistry, Biophysics and Bioengineering, School of Engineering and Physical Sciences, Heriot-Watt University, Edinburgh EH14 4AS, UK
| | - Hala S. Dhowre
- Department of Eye and Vision Science, Institute of Life Course and Medical Sciences, University of Liverpool, Liverpool L7 8TX, UK; (H.S.D.); (O.A.K.)
| | - Olivia A. Kingston
- Department of Eye and Vision Science, Institute of Life Course and Medical Sciences, University of Liverpool, Liverpool L7 8TX, UK; (H.S.D.); (O.A.K.)
| | - Carl M. Sheridan
- Department of Eye and Vision Science, Institute of Life Course and Medical Sciences, University of Liverpool, Liverpool L7 8TX, UK; (H.S.D.); (O.A.K.)
| | - Hannah J. Levis
- Department of Eye and Vision Science, Institute of Life Course and Medical Sciences, University of Liverpool, Liverpool L7 8TX, UK; (H.S.D.); (O.A.K.)
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21
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Kang D, Liu Z, Qian C, Huang J, Zhou Y, Mao X, Qu Q, Liu B, Wang J, Wang Y, Hu Z, Huang W, Miao Y. A three-dimensional bioprinting technique, based on a gelatin/alginate hydrogel, for the tissue engineering of hair follicle reconstruction. Int J Biol Macromol 2021:S0141-8130(21)01927-9. [PMID: 34509522 DOI: 10.1016/j.ijbiomac.2021.09.014] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2021] [Revised: 08/31/2021] [Accepted: 09/02/2021] [Indexed: 12/17/2022]
Abstract
Hair loss remains a challenging clinical problem that influences the quality of life. Three-dimensional (3D) bioprinting has become a valuable tool for fabricating tissue constructs for transplantation and other biomedical applications. Although some simple organs, such as skin and cartilage, have been successfully simulated, it remains challenging to make hair follicles (HFs), which are highly complex organs. The tissue engineering of human HFs has been a long-standing challenge, and progress with this has lagged behind that with other lab-grown tissues. This is principally due to a lack of availability of a platform that can successfully recapitulate the microenvironmental cues required to maintain the requisite cellular interactions for hair neogenesis. In this study, we used a 3D bioprinting technique based on a gelatin/alginate hydrogel to construct a multilayer composite scaffold with cuticular and corium layers to simulate the microenvironment of dermal papilla cells (DPCs) in the human body. This new approach permits the controllable formation of self-aggregating spheroids of DPCs in a physiologically relevant extracellular matrix and the initiation of epidermal-mesenchymal interactions, which results in HF formation in vivo. In conclusion, our 3D-bioprinted multilayer composite scaffold prepared using a gelatin/alginate hydrogel provides a suitable 3D microenvironment for DPCs to induce HF formation. The ability to regenerate entire HFs should have a significant impact on the medical management of hair loss. This method may also have critical applications for skin tissue engineering, with its appendages, for other purposes.
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Affiliation(s)
- Deni Kang
- Department of Plastic and Aesthetic Surgery, Nanfang Hospital, Southern Medical University, Guangzhou, Guangdong 510515, China
| | - Zhen Liu
- Department of Plastic and Aesthetic Surgery, Nanfang Hospital, Southern Medical University, Guangzhou, Guangdong 510515, China
| | - Chuanmu Qian
- Department of Anesthesiology, Guangdong Second Provincial General Hospital, Guangzhou, Guangdong 510317, China
| | - Junfei Huang
- Department of Plastic and Aesthetic Surgery, Nanfang Hospital, Southern Medical University, Guangzhou, Guangdong 510515, China
| | - Yi Zhou
- Department of Plastic and Aesthetic Surgery, Nanfang Hospital, Southern Medical University, Guangzhou, Guangdong 510515, China
| | - Xiaoyan Mao
- Department of Plastic and Aesthetic Surgery, Nanfang Hospital, Southern Medical University, Guangzhou, Guangdong 510515, China
| | - Qian Qu
- Department of Plastic and Aesthetic Surgery, Nanfang Hospital, Southern Medical University, Guangzhou, Guangdong 510515, China
| | - Bingcheng Liu
- Department of Plastic and Aesthetic Surgery, Nanfang Hospital, Southern Medical University, Guangzhou, Guangdong 510515, China
| | - Jin Wang
- Department of Plastic and Aesthetic Surgery, Nanfang Hospital, Southern Medical University, Guangzhou, Guangdong 510515, China
| | - Yilin Wang
- Department of Human Anatomy, School of Basic Medical Sciences, Southern Medical University, Guangzhou, Guangdong 510515, China
| | - Zhiqi Hu
- Department of Plastic and Aesthetic Surgery, Nanfang Hospital, Southern Medical University, Guangzhou, Guangdong 510515, China.
| | - Wenhua Huang
- Department of Human Anatomy, School of Basic Medical Sciences, Southern Medical University, Guangzhou, Guangdong 510515, China.
| | - Yong Miao
- Department of Plastic and Aesthetic Surgery, Nanfang Hospital, Southern Medical University, Guangzhou, Guangdong 510515, China.
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22
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Gu Y, Yao K, Fu Q. Lens regeneration: scientific discoveries and clinical possibilities. Mol Biol Rep 2021; 48:4911-4923. [PMID: 34143397 DOI: 10.1007/s11033-021-06489-5] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2021] [Accepted: 06/08/2021] [Indexed: 12/11/2022]
Abstract
In the process of exploring new methods for cataract treatment, lens regeneration is an ideal strategy for effectively restoring accommodative vision and avoiding postoperative complications and has great clinical potential. Lens regeneration, which is not a simple repetition of lens development, depends on the complex regulatory network comprising the FGF, BMP/TGF-β, Notch, and Wnt signaling pathways. Current research mainly focuses on in situ and in vitro lens regeneration. On the one hand, the possibility of the autologous stem cell in situ regeneration of functional lenses has been confirmed; on the other hand, both embryonic stem cells and induced pluripotent stem cells have been induced into lentoid bodies in vitro which are similar to the natural lens to a certain extent. This article will briefly summarize the regulatory mechanisms of lens development, describe the recent progress of lens regeneration, explore the key molecular signaling pathways, and, more importantly, discuss the prospects and challenges of their clinical applications to provide reference for clinical transformations.
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Affiliation(s)
- Yuzhou Gu
- Eye Center of the Second Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, 310009, Zhejiang Province, China.,Zhejiang Provincial Key Lab of Ophthalmology, Hangzhou, 310009, Zhejiang Province, China
| | - Ke Yao
- Eye Center of the Second Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, 310009, Zhejiang Province, China. .,Zhejiang Provincial Key Lab of Ophthalmology, Hangzhou, 310009, Zhejiang Province, China.
| | - Qiuli Fu
- Eye Center of the Second Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, 310009, Zhejiang Province, China. .,Zhejiang Provincial Key Lab of Ophthalmology, Hangzhou, 310009, Zhejiang Province, China.
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