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Berger T, Schlötzer-Schrehardt U, Flockerzi F, Daas L, Flockerzi E, Seitz B. Severe ulcerative keratopathy following implantation of an acellular porcine corneal stromal lenticule in a patient with keratoconus. Cont Lens Anterior Eye 2024; 47:102145. [PMID: 38472013 DOI: 10.1016/j.clae.2024.102145] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2023] [Revised: 03/04/2024] [Accepted: 03/09/2024] [Indexed: 03/14/2024]
Abstract
PURPOSE To report a case of ulcerative keratopathy following implantation of acellular porcine corneal stroma (APCS) in a patient with keratoconus (KC). METHODS A 58 year-old patient initially presented with an ulcerative keratopathy in the left eye. Previously, several corneal procedures (including radial keratotomy, laser-in-situ keratomileusis, crosslinking) were performed for KC. Eight months ago, an APCS lenticule (Xenia corneal implant, Gebauer Medizintechnik GmbH, Neuhausen, Germany) was implanted into a stromal pocket because of progressive keratectasia. Visual acuity was hand movement. Anterior segment optical coherence tomography showed a space between the APCS lenticule and the host stroma. Excimer laser-assisted penetrating keratoplasty (PKP, 8.0/8.1 mm) was performed in the left eye. The corneal explant was investigated by light and transmission electron microscopy. RESULTS Best-corrected visual acuity was 20/40 six weeks after PKP. Light microscopy demonstrated a stromal ulceration down to the APCS lenticule. No stromal cells could be found within the APCS lenticule eight months after implantation. The APCS lenticule did not show a green stain of the collagens with Masson-Goldner staining and exhibited a strong Periodic acid-Schiff positive reaction. Electron microscopy of the APCS lenticule revealed cross-linked collagen lamellae without cellular components. Close to the interface, corneal collagen lamellae of the host cornea were disorganized. Few vital keratocytes were present on the surface of the lenticule and appeared to cause mechanical disruption of the host stroma along the lenticule-stroma interface. CONCLUSION APCS implantation may lead to severe complications such as ulcerative keratopathy in otherwise uncomplicated KC corneas. In such cases, excimer laser-assisted PKP or Deep Anterior Lamellar Keratoplasty are the methods of choice to restore visual acuity.
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Affiliation(s)
- Tim Berger
- Department of Ophthalmology, Saarland University Medical Center, Homburg, Saar, Germany.
| | | | - Fidelis Flockerzi
- Institute of Pathology, Saarland University Medical Center, Homburg, Saar, Germany
| | - Loay Daas
- Department of Ophthalmology, Saarland University Medical Center, Homburg, Saar, Germany
| | - Elias Flockerzi
- Department of Ophthalmology, Saarland University Medical Center, Homburg, Saar, Germany
| | - Berthold Seitz
- Department of Ophthalmology, Saarland University Medical Center, Homburg, Saar, Germany
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2
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Suanno G, Genna VG, Maurizi E, Dieh AA, Griffith M, Ferrari G. Cell therapy in the cornea: The emerging role of microenvironment. Prog Retin Eye Res 2024; 102:101275. [PMID: 38797320 DOI: 10.1016/j.preteyeres.2024.101275] [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: 10/11/2023] [Revised: 05/22/2024] [Accepted: 05/23/2024] [Indexed: 05/29/2024]
Abstract
The cornea is an ideal testing field for cell therapies. Its highly ordered structure, where specific cell populations are sequestered in different layers, together with its accessibility, has allowed the development of the first stem cell-based therapy approved by the European Medicine Agency. Today, different techniques have been proposed for autologous and allogeneic limbal and non-limbal cell transplantation. Cell replacement has also been attempted in cases of endothelial cell decompensation as it occurs in Fuchs dystrophy: injection of cultivated allogeneic endothelial cells is now in advanced phases of clinical development. Recently, stromal substitutes have been developed with excellent integration capability and transparency. Finally, cell-derived products, such as exosomes obtained from different sources, have been investigated for the treatment of severe corneal diseases with encouraging results. Optimization of the success rate of cell therapies obviously requires high-quality cultured cells/products, but the role of the surrounding microenvironment is equally important to allow engraftment of transplanted cells, to preserve their functions and, ultimately, lead to restoration of tissue integrity and transparency of the cornea.
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Affiliation(s)
- Giuseppe Suanno
- Vita-Salute San Raffaele University, Milan, Italy; Eye Repair Unit, Division of Neuroscience, IRCCS San Raffaele Scientific Institute, Milan, Italy
| | | | - Eleonora Maurizi
- Centre for Regenerative Medicine ''S. Ferrari'', University of Modena and Reggio Emilia, Modena, Italy
| | - Anas Abu Dieh
- Maisonneuve-Rosemont Hospital Research Centre, Montreal, Quebec, Canada
| | - May Griffith
- Maisonneuve-Rosemont Hospital Research Centre, Montreal, Quebec, Canada.
| | - Giulio Ferrari
- Vita-Salute San Raffaele University, Milan, Italy; Eye Repair Unit, Division of Neuroscience, IRCCS San Raffaele Scientific Institute, Milan, Italy; Ophthalmology Unit, IRCCS San Raffaele Scientific Institute, Milan, Italy.
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3
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Wang Y, Geng Q, Lyu H, Sun W, Fan X, Ma K, Wu K, Wang J, Wang Y, Mei D, Guo C, Xiu P, Pan D, Tao K. Bioinspired Flexible Hydrogelation with Programmable Properties for Tactile Sensing. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2024:e2401678. [PMID: 38678380 DOI: 10.1002/adma.202401678] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/31/2024] [Revised: 04/20/2024] [Indexed: 04/29/2024]
Abstract
Tactile sensing requires integrated detection platforms with distributed and highly sensitive haptic sensing capabilities along with biocompatibility, aiming to replicate the physiological functions of the human skin and empower industrial robotic and prosthetic wearers to detect tactile information. In this regard, short peptide-based self-assembled hydrogels show promising potential to act as bioinspired supramolecular substrates for developing tactile sensors showing biocompatibility and biodegradability. However, the intrinsic difficulty to modulate the mechanical properties severely restricts their extensive employment. Herein, by controlling the self-assembly of 9-fluorenylmethoxycarbonyl-modifid diphenylalanine (Fmoc-FF) through introduction of polyethylene glycol diacrylate (PEGDA), wider nanoribbons are achieved by untwisting from well-established thinner nanofibers, and the mechanical properties of the supramolecular hydrogels can be enhanced 10-fold, supplying bioinspired supramolecular encapsulating substrate for tactile sensing. Furthermore, by doping with poly(3,4-ethylenedioxythiophene):poly(styrene sulfonate) (PEDOT:PSS) and 9-fluorenylmethoxycarbonyl-modifid 3,4-dihydroxy-l-phenylalanine (Fmoc-DOPA), the Fmoc-FF self-assembled hydrogels can be engineered to be conductive and adhesive, providing bioinspired sensing units and adhesive layer for tactile sensing applications. Therefore, the integration of these modules results in peptide hydrogelation-based tactile sensors, showing high sensitivity and sustainable responses with intrinsic biocompatibility and biodegradability. The findings establish the feasibility of developing programmable peptide self-assembly with adjustable features for tactile sensing applications.
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Affiliation(s)
- Yunxiao Wang
- State Key Laboratory of Fluid Power and Mechatronic Systems, Key Laboratory of Advanced Manufacturing Technology of Zhejiang Province, School of Mechanical Engineering, Zhejiang University, Hangzhou, 310058, China
- Zhejiang-Israel Joint Laboratory of Self-Assembling Functional Materials, ZJU-Hangzhou Global Scientific and Technological Innovation Center, Hangzhou, 311215, China
- Joint Laboratory of Bio-Organic Dielectrics, Hangzhou, 310058, China
| | - Qiang Geng
- State Key Laboratory of Fluid Power and Mechatronic Systems, Key Laboratory of Advanced Manufacturing Technology of Zhejiang Province, School of Mechanical Engineering, Zhejiang University, Hangzhou, 310058, China
- Zhejiang-Israel Joint Laboratory of Self-Assembling Functional Materials, ZJU-Hangzhou Global Scientific and Technological Innovation Center, Hangzhou, 311215, China
- Joint Laboratory of Bio-Organic Dielectrics, Hangzhou, 310058, China
| | - Hao Lyu
- School of Engineering, Westlake University, Hangzhou, Zhejiang, 310030, China
| | - Wuxuepeng Sun
- Department of Engineering Mechanics, Zhejiang University, Hangzhou, 310027, China
| | - Xinyuan Fan
- State Key Laboratory of Fluid Power and Mechatronic Systems, Key Laboratory of Advanced Manufacturing Technology of Zhejiang Province, School of Mechanical Engineering, Zhejiang University, Hangzhou, 310058, China
- Zhejiang-Israel Joint Laboratory of Self-Assembling Functional Materials, ZJU-Hangzhou Global Scientific and Technological Innovation Center, Hangzhou, 311215, China
- Joint Laboratory of Bio-Organic Dielectrics, Hangzhou, 310058, China
| | - Kang Ma
- State Key Laboratory of Fluid Power and Mechatronic Systems, Key Laboratory of Advanced Manufacturing Technology of Zhejiang Province, School of Mechanical Engineering, Zhejiang University, Hangzhou, 310058, China
- Zhejiang-Israel Joint Laboratory of Self-Assembling Functional Materials, ZJU-Hangzhou Global Scientific and Technological Innovation Center, Hangzhou, 311215, China
- Joint Laboratory of Bio-Organic Dielectrics, Hangzhou, 310058, China
| | - Kai Wu
- Department of Engineering Mechanics, Zhejiang University, Hangzhou, 310027, China
| | - Jinhe Wang
- Department of Engineering Mechanics, Zhejiang University, Hangzhou, 310027, China
| | - Yancheng Wang
- State Key Laboratory of Fluid Power and Mechatronic Systems, Key Laboratory of Advanced Manufacturing Technology of Zhejiang Province, School of Mechanical Engineering, Zhejiang University, Hangzhou, 310058, China
- Joint Laboratory of Bio-Organic Dielectrics, Hangzhou, 310058, China
| | - Deqing Mei
- State Key Laboratory of Fluid Power and Mechatronic Systems, Key Laboratory of Advanced Manufacturing Technology of Zhejiang Province, School of Mechanical Engineering, Zhejiang University, Hangzhou, 310058, China
| | - Chengchen Guo
- School of Engineering, Westlake University, Hangzhou, Zhejiang, 310030, China
- Research Center for Industries of the Future, Westlake University, Hangzhou, Zhejiang, 310030, China
- Westlake Laboratory of Life Sciences and Biomedicine, Hangzhou, Zhejiang, 310024, China
| | - Peng Xiu
- Department of Engineering Mechanics, Zhejiang University, Hangzhou, 310027, China
| | - Dingyi Pan
- Department of Engineering Mechanics, Zhejiang University, Hangzhou, 310027, China
| | - Kai Tao
- State Key Laboratory of Fluid Power and Mechatronic Systems, Key Laboratory of Advanced Manufacturing Technology of Zhejiang Province, School of Mechanical Engineering, Zhejiang University, Hangzhou, 310058, China
- Zhejiang-Israel Joint Laboratory of Self-Assembling Functional Materials, ZJU-Hangzhou Global Scientific and Technological Innovation Center, Hangzhou, 311215, China
- Joint Laboratory of Bio-Organic Dielectrics, Hangzhou, 310058, China
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Meissner JM, Chmielińska A, Ofri R, Cisło-Sankowska A, Marycz K. Extracellular Vesicles Isolated from Equine Adipose-Derived Stromal Stem Cells (ASCs) Mitigate Tunicamycin-Induced ER Stress in Equine Corneal Stromal Stem Cells (CSSCs). Curr Issues Mol Biol 2024; 46:3251-3277. [PMID: 38666934 PMCID: PMC11048834 DOI: 10.3390/cimb46040204] [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: 02/26/2024] [Revised: 03/29/2024] [Accepted: 04/03/2024] [Indexed: 04/28/2024] Open
Abstract
Corneal ulcers, characterized by severe inflammation of the cornea, can lead to serious, debilitating complications and may be vision-threatening for horses. In this study, we aimed to investigate the role of endoplasmic reticulum (ER) stress in corneal stem progenitor cell (CSSC) dysfunction and explore the potential of equine adipose-derived stromal stem cell (ASC)-derived extracellular vesicles (EVs) to improve corneal wound healing. We showed that CSSCs expressed high levels of CD44, CD45, and CD90 surface markers, indicating their stemness. Supplementation of the ER-stress-inducer tunicamycin to CSSCs resulted in reduced proliferative and migratory potential, accumulation of endoplasmic reticulum (ER)-stressed cells in the G0/G1 phase of the cell cycle, increased expression of proinflammatory genes, induced oxidative stress and sustained ER stress, and unfolded protein response (UPR). Importantly, treatment with EVs increased the proliferative activity and number of cells in the G2/Mitosis phase, enhanced migratory ability, suppressed the overexpression of proinflammatory cytokines, and upregulated the anti-inflammatory miRNA-146a-5p, compared to control and/or ER-stressed cells. Additionally, EVs lowered the expression of ER-stress master regulators and effectors (PERK, IRE1, ATF6, and XBP1), increased the number of mitochondria, and reduced the expression of Fis-1 and Parkin, thereby promoting metabolic homeostasis and protecting against apoptosis in equine CSSCs. Our findings demonstrate that MSCs-derived EVs represent an innovative and promising therapeutic strategy for the transfer of bioactive mediators which regulate various cellular and molecular signaling pathways.
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Affiliation(s)
- Justyna M. Meissner
- Department of Experimental Biology, Faculty of Biology and Animal Science, Wrocław University of Environmental and Life Sciences, Norwida 27B, 50-375 Wroclaw, Poland;
| | - Aleksandra Chmielińska
- International Institute of Translational Medicine, Jesionowa 11, Malin, 55-114 Wisznia Mala, Poland; (A.C.); (A.C.-S.)
| | - Ron Ofri
- Koret School of Veterinary Medicine, Hebrew University of Jerusalem, P.O. Box 12, Rehovot 7610001, Israel;
| | - Anna Cisło-Sankowska
- International Institute of Translational Medicine, Jesionowa 11, Malin, 55-114 Wisznia Mala, Poland; (A.C.); (A.C.-S.)
| | - Krzysztof Marycz
- Department of Experimental Biology, Faculty of Biology and Animal Science, Wrocław University of Environmental and Life Sciences, Norwida 27B, 50-375 Wroclaw, Poland;
- International Institute of Translational Medicine, Jesionowa 11, Malin, 55-114 Wisznia Mala, Poland; (A.C.); (A.C.-S.)
- Department of Medicine and Epidemiology, School of Veterinary Medicine, University of California, Davis, CA 95516, USA
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Bhutani U, Dey N, Chowdhury SK, Waghmare N, Mahapatra RD, Selvakumar K, Chandru A, Bhowmick T, Agrawal P. Biopolymeric corneal lenticules by digital light processing based bioprinting: a dynamic substitute for corneal transplant. Biomed Mater 2024; 19:035017. [PMID: 38471165 DOI: 10.1088/1748-605x/ad3312] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2024] [Accepted: 03/12/2024] [Indexed: 03/14/2024]
Abstract
Digital light processing (DLP) technology has gained significant attention for its ability to construct intricate structures for various applications in tissue modeling and regeneration. In this study, we aimed to design corneal lenticules using DLP bioprinting technology, utilizing dual network bioinks to mimic the characteristics of the human cornea. The bioink was prepared using methacrylated hyaluronic acid and methacrylated gelatin, where ruthenium salt and sodium persulfate were included for mediating photo-crosslinking while tartrazine was used as a photoabsorber. The bioprinted lenticules were optically transparent (85.45% ± 0.14%), exhibited adhesive strength (58.67 ± 17.5 kPa), and compressive modulus (535.42 ± 29.05 kPa) sufficient for supporting corneal tissue integration and regeneration. Puncture resistance tests and drag force analysis further confirmed the excellent mechanical performance of the lenticules enabling their application as potential corneal implants. Additionally, the lenticules demonstrated outstanding support for re-epithelialization and stromal regeneration when assessed with human corneal stromal cells. We generated implant ready corneal lenticules while optimizing bioink and bioprinting parameters, providing valuable solution for individuals suffering from various corneal defects and waiting for corneal transplants.
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Affiliation(s)
- Utkarsh Bhutani
- Pandorum Technologies Private Limited, Bangalore Bioinnovation Centre, Helix Biotech Park, Electronic City, Phase 1, Bengaluru 560100, India
| | - Namit Dey
- Pandorum Technologies Private Limited, Bangalore Bioinnovation Centre, Helix Biotech Park, Electronic City, Phase 1, Bengaluru 560100, India
| | - Suvro Kanti Chowdhury
- Pandorum Technologies Private Limited, Bangalore Bioinnovation Centre, Helix Biotech Park, Electronic City, Phase 1, Bengaluru 560100, India
| | - Neha Waghmare
- Pandorum Technologies Private Limited, Bangalore Bioinnovation Centre, Helix Biotech Park, Electronic City, Phase 1, Bengaluru 560100, India
| | - Rita Das Mahapatra
- Pandorum Technologies Private Limited, Bangalore Bioinnovation Centre, Helix Biotech Park, Electronic City, Phase 1, Bengaluru 560100, India
| | - Kamalnath Selvakumar
- Pandorum Technologies Private Limited, Bangalore Bioinnovation Centre, Helix Biotech Park, Electronic City, Phase 1, Bengaluru 560100, India
| | - Arun Chandru
- Pandorum Technologies Private Limited, Bangalore Bioinnovation Centre, Helix Biotech Park, Electronic City, Phase 1, Bengaluru 560100, India
| | - Tuhin Bhowmick
- Pandorum Technologies Private Limited, Bangalore Bioinnovation Centre, Helix Biotech Park, Electronic City, Phase 1, Bengaluru 560100, India
- Pandorum International Inc., San Francisco, CA, United States of America
| | - Parinita Agrawal
- Pandorum Technologies Private Limited, Bangalore Bioinnovation Centre, Helix Biotech Park, Electronic City, Phase 1, Bengaluru 560100, India
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Sharma M, Kaur S, Mavlankar NA, Chanda A, Gupta PC, Saikia UN, Ram J, Pal A, Mandal S, Guptasarma P, Luthra-Guptasarma M. Use of discarded corneo-scleral rims to create cornea-like tissue. Mol Biol Rep 2024; 51:391. [PMID: 38446253 DOI: 10.1007/s11033-024-09321-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2023] [Accepted: 02/06/2024] [Indexed: 03/07/2024]
Abstract
BACKGROUND Corneal disease is a major cause of blindness. Transplantation of cadaver-derived corneas (keratoplasty) is still the current therapy of choice; however, the global shortage of donor corneas continues to drive a search for alternatives. To this end, biosynthetic corneal substitutes have recently begun to gain importance. Here, we present a novel method for the generation of a cornea-like tissue (CLT), using corneo-scleral rims discarded after keratoplasty. METHODS AND RESULTS Type I collagen was polymerized within the corneo-scleral rim, which functioned as a 'host' mould, directing the 'guest' collagen to polymerize into disc-shaped cornea-like material (CLM), displaying the shape, curvature, thickness, and transparency of normal cornea. This polymerization of collagen appears to derive from some morphogenetic influence exerted by the corneo-scleral rim. Once the CLM had formed naturally, we used collagen crosslinking to fortify it, and then introduced cells to generate a stratified epithelial layer to create cornea-like tissue (CLT) displaying characteristics of native cornea. Through the excision and reuse of rims, each rim turned out to be useful for the generation of multiple cornea-shaped CLTs. CONCLUSIONS The approach effectively helps to shorten the gap between demand and supply of CLMs/CLTs for transplantation. We are exploring the surgical transplantation of this CLT into animal eyes, as keratoprostheses, as a precursor to future applications involving human eyes. It is possible to use either the CLM or CLT, for patients with varying corneal blinding diseases.
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Affiliation(s)
- Maryada Sharma
- Department of Immunopathology, Research Block A, Postgraduate Institute of Medical Education and Research (PGIMER), Sector-12, Chandigarh, 160012, India
- Department of Otolaryngology, Postgraduate Institute of Medical Education and Research (PGIMER), Sector-12, Chandigarh, 160012, India
| | - Subhpreet Kaur
- Department of Immunopathology, Research Block A, Postgraduate Institute of Medical Education and Research (PGIMER), Sector-12, Chandigarh, 160012, India
| | | | - Alokananda Chanda
- Department of Chemical Sciences, Indian Institute of Science Education and Research (IISER) Mohali, SAS Nagar, Punjab, India
| | - Parul Chawla Gupta
- Departments of Ophthalmology, Postgraduate Institute of Medical Education and Research (PGIMER), Sector-12, Chandigarh, 160012, India
| | - Uma Nahar Saikia
- Departments of Histopathology, Postgraduate Institute of Medical Education and Research (PGIMER), Sector-12, Chandigarh, 160012, India
| | - Jagat Ram
- Departments of Ophthalmology, Postgraduate Institute of Medical Education and Research (PGIMER), Sector-12, Chandigarh, 160012, India
| | - Asish Pal
- Institute of Nano Science and Technology, SAS Nagar, Punjab, India
| | - Sanjay Mandal
- Department of Chemical Sciences, Indian Institute of Science Education and Research (IISER) Mohali, SAS Nagar, Punjab, India
| | - Purnananda Guptasarma
- Department of Biological Sciences, Indian Institute of Science Education and Research (IISER) Mohali, SAS Nagar, Punjab, India
| | - Manni Luthra-Guptasarma
- Department of Immunopathology, Research Block A, Postgraduate Institute of Medical Education and Research (PGIMER), Sector-12, Chandigarh, 160012, India.
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Puistola P, Miettinen S, Skottman H, Mörö A. Novel strategy for multi-material 3D bioprinting of human stem cell based corneal stroma with heterogenous design. Mater Today Bio 2024; 24:100924. [PMID: 38226015 PMCID: PMC10788621 DOI: 10.1016/j.mtbio.2023.100924] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2023] [Revised: 12/13/2023] [Accepted: 12/18/2023] [Indexed: 01/17/2024] Open
Abstract
Three-dimensional (3D) bioprinting offers an automated, customizable solution to manufacture highly detailed 3D tissue constructs and holds great promise for regenerative medicine to solve the severe global shortage of donor tissues and organs. However, uni-material 3D bioprinting is not sufficient for manufacturing heterogenous 3D constructs with native-like microstructures and thus, innovative multi-material solutions are required. Here, we developed a novel multi-material 3D bioprinting strategy for bioprinting human corneal stroma. The human cornea is the transparent outer layer of your eye, and vision loss due to corneal blindness has serious effects on the quality of life of individuals. One of the main reasons for corneal blindness is the damage in the detailed organization of the corneal stroma where collagen fibrils are arranged in layers perpendicular to each other and the corneal stromal cells grow along the fibrils. Donor corneas for treating corneal blindness are scarce, and the current tissue engineering (TE) technologies cannot produce artificial corneas with the complex microstructure of native corneal stroma. To address this, we developed a novel multi-material 3D bioprinting strategy to mimic detailed organization of corneal stroma. These multi-material 3D structures with heterogenous design were bioprinted by using human adipose tissue -derived stem cells (hASCs) and hyaluronic acid (HA) -based bioinks with varying stiffnesses. In our novel design of 3D models, acellular stiffer HA-bioink and cell-laden softer HA-bioink were printed in alternating filaments, and the filaments were printed perpendicularly in alternating layers. The multi-material bioprinting strategy was applied for the first time in corneal stroma 3D bioprinting to mimic the native microstructure. As a result, the soft bioink promoted cellular growth and tissue formation of hASCs in the multi-material 3D bioprinted composites, whereas the stiff bioink provided mechanical support as well as guidance of cellular organization upon culture. Interestingly, cellular growth and tissue formation altered the mechanical properties of the bioprinted composite constructs significantly. Importantly, the bioprinted composite structures showed good integration to the host tissue in ex vivo cornea organ culture model. As a conclusion, the developed multi-material bioprinting strategy provides great potential as a biofabrication solution for manufacturing organized, heterogenous microstructures of native tissues. To the best of our knowledge, this multi-material bioprinting strategy has never been applied in corneal bioprinting. Therefore, our work advances the technological achievements in additive manufacturing and brings the field of corneal TE to a new level.
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Affiliation(s)
- Paula Puistola
- Eye Regeneration Group, Faculty of Medicine and Health Technology, Tampere University, Tampere 33520, Finland
| | - Susanna Miettinen
- Adult Stem Cell Group, Faculty of Medicine and Health Technology, Tampere University, Tampere 33520, Finland
- Research, Development and Innovation Centre, Tampere University Hospital, 33520 Tampere, Finland
| | - Heli Skottman
- Eye Regeneration Group, Faculty of Medicine and Health Technology, Tampere University, Tampere 33520, Finland
| | - Anni Mörö
- Eye Regeneration Group, Faculty of Medicine and Health Technology, Tampere University, Tampere 33520, Finland
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8
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Hjortdal J. Refractive and cataract surgery beyond VISION2020. Indian J Ophthalmol 2024; 72:3-5. [PMID: 38131561 PMCID: PMC10841810 DOI: 10.4103/ijo.ijo_2767_23] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2023] Open
Affiliation(s)
- Jesper Hjortdal
- Department of Ophthalmology, Aarhus University Hospital, Aarhus, Denmark. E-mail:
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9
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Ni H, Liu C, Kong L, Zhai L, Chen J, Liu Q, Chen Z, Wu M, Chen J, Guo Y, Bai W, Zhang D, Xia K, Huang G, Pan S, Liao B, Ma K, Zhang LK, Cheng J, Guan YQ. Preparation of injectable porcine skin-derived collagen and its application in delaying skin aging by promoting the adhesion and chemotaxis of skin fibroblasts. Int J Biol Macromol 2023; 253:126718. [PMID: 37673166 DOI: 10.1016/j.ijbiomac.2023.126718] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2023] [Revised: 08/18/2023] [Accepted: 09/03/2023] [Indexed: 09/08/2023]
Abstract
Collagen, as the main component of human skin, plays a vital role in maintaining dermal integrity. Its loss will lead to dermis destruction and collapse, resulting in skin aging. At present, injection of exogenous collagen is an important means to delay skin aging. In this study, high-purity collagen was extracted from porcine skin. Our research revealed that it can effectively promote the adhesion and chemotaxis of HSF cells. It can also reduce the expression of β-galactosidase, decrease ROS levels, and increase the expression of the collagen precursors, p53 and p16 in HSF cells during senescence. After local injection into the aging skin of rats, it was found that the number of cells and type I collagen fibers in the dermis increased significantly, and the arrangement of these fibers became more uniform and orderly. Moreover, the important thing is that it is biocompatible. To sum up, the porcine skin collagen we extracted is an anti-aging biomaterial with application potential.
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Affiliation(s)
- He Ni
- School of Life Science, South China Normal University, Guangzhou 510631, China; Chongqing Fanghe Biotechnology Co., LTD, Chongqing 400000, China
| | - Chao Liu
- School of Life Science, South China Normal University, Guangzhou 510631, China
| | - Lili Kong
- Chongqing Fanghe Biotechnology Co., LTD, Chongqing 400000, China
| | - Limin Zhai
- School of Life Science, South China Normal University, Guangzhou 510631, China
| | - Jiapeng Chen
- School of Life Science, South China Normal University, Guangzhou 510631, China
| | - Qingpeng Liu
- School of Life Science, South China Normal University, Guangzhou 510631, China
| | - Zhendong Chen
- School of Life Science, South China Normal University, Guangzhou 510631, China
| | - Mengdie Wu
- School of Life Science, South China Normal University, Guangzhou 510631, China
| | - Jie Chen
- School of Life Science, South China Normal University, Guangzhou 510631, China
| | - Yiyan Guo
- School of Life Science, South China Normal University, Guangzhou 510631, China
| | - Weiwei Bai
- School of Life Science, South China Normal University, Guangzhou 510631, China
| | - Dandan Zhang
- School of Life Science, South China Normal University, Guangzhou 510631, China
| | - Kunwen Xia
- School of Life Science, South China Normal University, Guangzhou 510631, China
| | - Guowei Huang
- School of Life Science, South China Normal University, Guangzhou 510631, China
| | - Shengjun Pan
- School of Life Science, South China Normal University, Guangzhou 510631, China
| | - Beining Liao
- School of Life Science, South China Normal University, Guangzhou 510631, China
| | - Kuo Ma
- School of Life Science, South China Normal University, Guangzhou 510631, China
| | - Ling-Kun Zhang
- School of Life Science, South China Normal University, Guangzhou 510631, China; South China Normal University-Panyu Central Hospital Joint Laboratory of Translational Medical Research, Panyu Central Hospital, Guangzhou 511400, China; MOE Key Laboratory of Laser Life Science & Institute of Laser Life Science, Guangdong Provincial Key Laboratory of Laser Life Science, Guangzhou Key Laboratory of Spectral Analysis and Functional Probes, College of Biophotonics, South China Normal University, Guangzhou 510631, China.
| | - Jian Cheng
- Chongqing Fanghe Biotechnology Co., LTD, Chongqing 400000, China.
| | - Yan-Qing Guan
- School of Life Science, South China Normal University, Guangzhou 510631, China; South China Normal University-Panyu Central Hospital Joint Laboratory of Translational Medical Research, Panyu Central Hospital, Guangzhou 511400, China; MOE Key Laboratory of Laser Life Science & Institute of Laser Life Science, Guangdong Provincial Key Laboratory of Laser Life Science, Guangzhou Key Laboratory of Spectral Analysis and Functional Probes, College of Biophotonics, South China Normal University, Guangzhou 510631, China.
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10
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Meng S, Hu H, Qiao Y, Wang F, Zhang BN, Sun D, Zhou L, Zhao L, Xie L, Zhang H, Zhou Q. A Versatile Hydrogel with Antibacterial and Sequential Drug-Releasing Capability for the Programmable Healing of Infectious Keratitis. ACS NANO 2023; 17:24055-24069. [PMID: 38044579 DOI: 10.1021/acsnano.3c09034] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/05/2023]
Abstract
Hydrogels have attracted tremendous attention as favorable corneal substitutes for treating severe infectious keratitis (IK). However, current hydrogel-based corneal substitutes were majorly designed to promote the single stage of corneal regeneration, which falls short in meeting the clinical management needs of severe IK including the multiple phases of corneal wound healing. Herein, we introduce a versatile hybrid hydrogel (SQPV) composed of silk fibroin and chitosan, which exhibits spatiotemporal properties for drug release. The SQPV is fabricated by incorporating verteporfin-loaded poly(lactic-co-glycolic)-polyethylene glycol-o-nitrobenzene micelles into a hydrogel network, which is formed from methacrylate silk fibroin and glycidyl methacrylate functionalized quaternized chitosan containing polydeoxyribonucleotide. This double network approach results in a material with exceptional anti-inflammatory, antibacterial, and proliferative stimulation and tissue remodeling regulation capabilities. Furthermore, SQPV showcases mechanical strength and transparency akin to those of native cornea. Extensive in vitro and in vivo studies validate SQPV's ability to effectively eliminate residual bacteria, mitigate inflammation, foster regeneration of corneal epithelium and stroma, prevent corneal scarring, and ultimately expedite wound healing. In summary, the SF/CS-based hybrid hydrogel may represent a promising substitute for comprehensive corneal repair and regeneration in severe IK.
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Affiliation(s)
- Shuqin Meng
- Eye Institute of Shandong First Medical University, State Key Laboratory Cultivation Base, Shandong Provincial Key Laboratory of Ophthalmology, Qingdao 266071, P.R. China
| | - Hao Hu
- Institute of Biomedical Materials and Engineering, College of Materials Science and Engineering, Qingdao University, Qingdao 266071, P.R. China
| | - Yujie Qiao
- Eye Institute of Shandong First Medical University, State Key Laboratory Cultivation Base, Shandong Provincial Key Laboratory of Ophthalmology, Qingdao 266071, P.R. China
| | - Fuyan Wang
- Eye Institute of Shandong First Medical University, State Key Laboratory Cultivation Base, Shandong Provincial Key Laboratory of Ophthalmology, Qingdao 266071, P.R. China
| | - Bi Ning Zhang
- Eye Institute of Shandong First Medical University, State Key Laboratory Cultivation Base, Shandong Provincial Key Laboratory of Ophthalmology, Qingdao 266071, P.R. China
| | - Difang Sun
- Eye Institute of Shandong First Medical University, State Key Laboratory Cultivation Base, Shandong Provincial Key Laboratory of Ophthalmology, Qingdao 266071, P.R. China
| | - Longfang Zhou
- Eye Institute of Shandong First Medical University, State Key Laboratory Cultivation Base, Shandong Provincial Key Laboratory of Ophthalmology, Qingdao 266071, P.R. China
| | - Long Zhao
- Eye Institute of Shandong First Medical University, State Key Laboratory Cultivation Base, Shandong Provincial Key Laboratory of Ophthalmology, Qingdao 266071, P.R. China
| | - Lixin Xie
- Eye Institute of Shandong First Medical University, State Key Laboratory Cultivation Base, Shandong Provincial Key Laboratory of Ophthalmology, Qingdao 266071, P.R. China
| | - Hengrui Zhang
- Eye Institute of Shandong First Medical University, State Key Laboratory Cultivation Base, Shandong Provincial Key Laboratory of Ophthalmology, Qingdao 266071, P.R. China
| | - Qingjun Zhou
- Eye Institute of Shandong First Medical University, State Key Laboratory Cultivation Base, Shandong Provincial Key Laboratory of Ophthalmology, Qingdao 266071, P.R. China
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11
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Ren S, Yang K, Xu L, Fan Q, Gu Y, Pang C, Zhao D. Machine learning analysis with the comprehensive index of corneal tomographic and biomechanical parameters in detecting pediatric subclinical keratoconus. Front Bioeng Biotechnol 2023; 11:1273500. [PMID: 38125302 PMCID: PMC10730932 DOI: 10.3389/fbioe.2023.1273500] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2023] [Accepted: 11/15/2023] [Indexed: 12/23/2023] Open
Abstract
Background: Keratoconus (KC) occurs at puberty but diagnosis is focused on adults. The early diagnosis of pediatric KC can prevent its progression and improve the quality of life of patients. This study aimed to evaluate the ability of corneal tomographic and biomechanical variables through machine learning analysis to detect subclinical keratoconus (SKC) in a pediatric population. Methods: Fifty-two KC, 52 SKC, and 52 control pediatric eyes matched by age and gender were recruited in a case-control study. The corneal tomographic and biomechanical parameters were measured by professionals. A linear mixed-effects test was used to compare the differences among the three groups and a least significant difference analysis was used to conduct pairwise comparisons. The receiver operating characteristic (ROC) curve and the Delong test were used to evaluate diagnostic ability. Variables were used in a multivariate logistic regression in the machine learning analysis, using a stepwise variable selection to decrease overfitting, and comprehensive indices for detecting pediatric SKC eyes were produced in each step. Results: PE, BAD-D, and TBI had the highest area under the curve (AUC) values in identifying pediatric KC eyes, and the corresponding cutoff values were 12 μm, 2.48, and 0.6, respectively. For discriminating SKC eyes, the highest AUC (95% CI) was found in SP A1 with a value of 0.84 (0.765, 0.915), and BAD-D was the best parameter among the corneal tomographic parameters with an AUC (95% CI) value of 0.817 (0.729, 0.886). Three models were generated in the machine learning analysis, and Model 3 (y = 0.400*PE + 1.982* DA ratio max [2 mm]-0.072 * SP A1-3.245) had the highest AUC (95% CI) value, with 90.4% sensitivity and 76.9% specificity, and the cutoff value providing the best Youden index was 0.19. Conclusion: The criteria of parameters for diagnosing pediatric KC and SKC eyes were inconsistent with the adult population. Combined corneal tomographic and biomechanical parameters could enhance the early diagnosis of young patients and improve the inadequate representation of pediatric KC research.
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Affiliation(s)
| | - Kaili Yang
- Henan Provincial People’s Hospital, Henan Eye Hospital, Henan Eye Institute, People’s Hospital of Zhengzhou University, Henan University People’s Hospital, Zhengzhou, China
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12
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Sueters J, Xiao F, Roovers JP, Bouman MB, Groenman F, Maas H, Huirne J, Smit T. Creation of a decellularized vaginal matrix from healthy human vaginal tissue for potential vagina reconstruction: experimental studies. Int J Surg 2023; 109:3905-3918. [PMID: 37755377 PMCID: PMC10720790 DOI: 10.1097/js9.0000000000000727] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2023] [Accepted: 08/21/2023] [Indexed: 09/28/2023]
Abstract
BACKGROUND When a disorder causes the absence of a healthy, full-size vagina, various neovaginal creation methods are available. Sometimes dilation or stretching of the vaginal cavity is sufficient, but intestinal or dermal flap tissue is generally required. However, different inherent tissue properties cause complications. Therefore, a lost body part should be replaced with a similar material. The use of organ-specific acellular vaginal tissue carries great potential, as its similar architecture and matrix composition make it suitable for vaginal regeneration. METHODS The authors developed an optimized protocol for decellularization of healthy human vaginal tissue. Resected colpectomy tissue from 12 healthy transgender patients was used. Successful decellularization was confirmed by applying acellular criteria from in-vivo remodeling reports. Suitability as a tissue-mimicking scaffold for vaginal reconstruction was determined by visible structural features, biocompatibility during stretching, and the presence of visible collagen, elastin, laminin, and fibronectin. RESULTS Histological examination confirmed the preservation of structural features, and minimal cellular residue was seen during fluorescence microscopy, DNA and RNA quantification, and fragment length examination. Biomechanical testing showed decreased peak load (55%, P <0.05), strain at rupture (23%, P <0.01), and ultimate tensile stress (55%, P <0.05) after decellularization, while the elastic modulus (68%) did not decrease significantly. Fluorescence microscopy revealed preserved Fibronectin-I/II/III and Laminin-I/II, while Collagen-I and Ficolin-2B were decreased but mostly retained. CONCLUSIONS The absence of cellular residue, moderately altered biomechanical extracellular matrix properties, and mostly preserved structural proteins appear to make our decellularized human vaginal matrix a suitable tissue-mimicking scaffold for vagina transplantation when tissue survival through vascularization and innervation are accomplished in the future.
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Affiliation(s)
- Jayson Sueters
- Department of Gynaecology, Amsterdam Reproduction and Development
| | - Fangxin Xiao
- Department of Human Movement Sciences, Faculty of Behavioral and Movement Sciences, Vrije Universiteit Amsterdam
- AMS – Musculoskeletal Health, Amsterdam Movement Sciences, VU Research Institutes
- School of Exercise and Health, Shanghai University of Sport, Shanghai, China
| | - Jan-Paul Roovers
- Department of Obstetrics and Gynecology, Amsterdam Reproduction and Development
| | - Mark-Bram Bouman
- Department of Plastic, Reconstructive and Hand Surgery, Amsterdam UMC – location VUmc
| | - Freek Groenman
- Department of Obstetrics and Gynecology, Amsterdam Reproduction and Development
| | - Huub Maas
- Department of Plastic, Reconstructive and Hand Surgery, Amsterdam UMC – location VUmc
- Department of Human Movement Sciences, Faculty of Behavioral and Movement Sciences, Vrije Universiteit Amsterdam
| | - Judith Huirne
- Department of Gynaecology, Amsterdam Reproduction and Development
| | - Theo Smit
- Department of Gynaecology, Amsterdam Reproduction and Development
- Department of Medical Biology, Amsterdam UMC – location AMC, Amsterdam, The Netherlands
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13
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Xeroudaki M, Rafat M, Moustardas P, Mukwaya A, Tabe S, Bellisario M, Peebo B, Lagali N. A double-crosslinked nanocellulose-reinforced dexamethasone-loaded collagen hydrogel for corneal application and sustained anti-inflammatory activity. Acta Biomater 2023; 172:234-248. [PMID: 37866722 DOI: 10.1016/j.actbio.2023.10.020] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2023] [Revised: 09/29/2023] [Accepted: 10/17/2023] [Indexed: 10/24/2023]
Abstract
In cases of blinding disease or trauma, hydrogels have been proposed as scaffolds for corneal regeneration and vehicles for ocular drug delivery. Restoration of corneal transparency, augmenting a thin cornea and postoperative drug delivery are particularly challenging in resource-limited regions where drug availability and patient compliance may be suboptimal. Here, we report a bioengineered hydrogel based on porcine skin collagen as an alternative to human donor corneal tissue for applications where long-term stability of the hydrogel is required. The hydrogel is reinforced with cellulose nanofibers extracted from the Ciona intestinalis sea invertebrate followed by double chemical and photochemical crosslinking. The hydrogel is additionally loaded with dexamethasone to provide sustained anti-inflammatory activity. The reinforced double-crosslinked hydrogel after drug loading maintained high optical transparency with significantly improved mechanical characteristics compared to non-reinforced hydrogels, while supporting a gradual sustained drug release for 60 days in vitro. Dexamethasone, after exposure to crosslinking and sterilization procedures used in hydrogel production, inhibited tube formation and cell migration of TNFα-stimulated vascular endothelial cells. The drug-loaded hydrogels suppressed key pro-inflammatory cytokines CCL2 and CXCL5 in TNFα-stimulated human corneal epithelial cells. Eight weeks after intra-stromal implantation in the cornea of 12 New-Zealand white rabbits subjected to an inflammatory suture stimulus, the dexamethasone-releasing hydrogels suppressed TNFα, MMP-9, and leukocyte and fibroblast cell invasion, resulting in reduced corneal haze, sustained corneal thickness and stromal morphology, and reduced overall vessel invasion. This collagen-nanocellulose double-crosslinked hydrogel can be implanted to treat corneal stromal disease while suppressing inflammation and maintaining transparency after corneal transplantation. STATEMENT OF SIGNIFICANCE: To treat blinding diseases, hydrogel scaffolds have been proposed to facilitate corneal restoration and ocular drug delivery. Here, we improve on a clinically tested collagen-based scaffold to improve mechanical robustness and enzymatic resistance by incorporating sustainably sourced nanocellulose and dual chemical-photochemical crosslinking to reinforce the scaffold, while simultaneously achieving sustained release of an incorporated anti-inflammatory drug, dexamethasone. Evaluated in the context of a corneal disease model with inflammation, the drug-releasing nanocellulose-reinforced collagen scaffold maintained the cornea's transparency and resisted degradation while suppressing inflammation postoperatively. This biomaterial could therefore potentially be applied in a wider range of sight-threatening diseases, overcoming suboptimal administration of postoperative medications to maintain hydrogel integrity and good vision.
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Affiliation(s)
- Maria Xeroudaki
- Division of Ophthalmology, Department of Biomedical and Clinical Sciences, Linköping University, Linköping, Sweden
| | - Mehrdad Rafat
- NaturaLens AB, Linköping, Sweden; LinkoCare Life Sciences AB, Linköping, Sweden; Department of Biomedical Engineering, Linköping University, Linköping, Sweden
| | - Petros Moustardas
- Division of Ophthalmology, Department of Biomedical and Clinical Sciences, Linköping University, Linköping, Sweden
| | - Anthony Mukwaya
- Division of Ophthalmology, Department of Biomedical and Clinical Sciences, Linköping University, Linköping, Sweden
| | - Shideh Tabe
- NaturaLens AB, Linköping, Sweden; LinkoCare Life Sciences AB, Linköping, Sweden
| | - Marco Bellisario
- Division of Ophthalmology, Department of Biomedical and Clinical Sciences, Linköping University, Linköping, Sweden
| | - Beatrice Peebo
- Division of Ophthalmology, Department of Biomedical and Clinical Sciences, Linköping University, Linköping, Sweden; Memira Eye Center Scandinavia, Solna, Sweden
| | - Neil Lagali
- Division of Ophthalmology, Department of Biomedical and Clinical Sciences, Linköping University, Linköping, Sweden; Department of Ophthalmology, Sørlandet Hospital Arendal, Arendal, Norway.
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14
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Dou S, Liu X, Shi W, Gao H. New dawn for keratoconus treatment: potential strategies for corneal stromal regeneration. Stem Cell Res Ther 2023; 14:317. [PMID: 37932824 PMCID: PMC10629149 DOI: 10.1186/s13287-023-03548-5] [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] [Received: 08/02/2023] [Accepted: 10/27/2023] [Indexed: 11/08/2023] Open
Abstract
Keratoconus is a progressive, ectatic and blinding disorder of the cornea, characterized by thinning of corneal stroma. As a highly prevalent among adolescents, keratoconus has been a leading indication for corneal transplantation worldwide. However, the severe shortage of donor corneas is a global issue, and the traditional corneal transplantation surgeries may superinduce multiple complications, necessitating efforts to develop more effective strategies for keratoconus treatment. In this review, we summarized several strategies to promote corneal stromal regeneration or improve corneal stromal thickness, including cell-based therapies, biosynthetic alternatives for inducing corneal regeneration, minimally invasive intrastromal implantation and bioengineered tissues for implantation. These strategies provided more accessible but safer alternatives from various perspectives for keratoconus treatment, paving the way for arresting the keratoconus progression in its earlier stage. For the treatments of corneal ectatic diseases beyond keratoconus, these approaches will provide important references and widen the therapy options in a donor tissue-independent manner.
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Affiliation(s)
- Shengqian Dou
- State Key Laboratory Cultivation Base, Shandong Provincial Key Laboratory of Ophthalmology, Eye Institute of Shandong First Medical University, Qingdao, China
- Qingdao Eye Hospital of Shandong First Medical University, Qingdao, China
| | - Xiaoxue Liu
- State Key Laboratory Cultivation Base, Shandong Provincial Key Laboratory of Ophthalmology, Eye Institute of Shandong First Medical University, Qingdao, China
- Eye Hospital of Shandong First Medical University, Jinan, China
- School of Ophthalmology, Shandong First Medical University, Jinan, China
| | - Weiyun Shi
- State Key Laboratory Cultivation Base, Shandong Provincial Key Laboratory of Ophthalmology, Eye Institute of Shandong First Medical University, Qingdao, China
- Eye Hospital of Shandong First Medical University, Jinan, China
- School of Ophthalmology, Shandong First Medical University, Jinan, China
| | - Hua Gao
- State Key Laboratory Cultivation Base, Shandong Provincial Key Laboratory of Ophthalmology, Eye Institute of Shandong First Medical University, Qingdao, China.
- Eye Hospital of Shandong First Medical University, Jinan, China.
- School of Ophthalmology, Shandong First Medical University, Jinan, China.
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15
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Mishra S, Joshi A, Ginu P, Sati A, Kumar SV. Corneal transplantation: A walk to vision. Med J Armed Forces India 2023; 79:645-650. [PMID: 37981925 PMCID: PMC10654358 DOI: 10.1016/j.mjafi.2023.08.010] [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: 07/08/2023] [Accepted: 08/19/2023] [Indexed: 11/21/2023] Open
Abstract
Corneal diseases are a major cause of blindness in the world. Corneal transplantation has been a cornerstone in the management of several of these advanced pathologies. This article discusses the evolution of corneal transplantation over a century, its indications, complications and briefly the various surgical techniques. Such tremendous technical improvisations from total corneal transplantation to lamellar keratoplasties have generated significant interest in the ophthalmic world and garnered momentum to the fight against blindness. Armed Forces Medical Services are also in vogue more than ever in this forward surge.
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Affiliation(s)
- S.K. Mishra
- Consultant & Head (Ophthalmology), Army Hospital (R & R), Delhi Cantt, India
| | - Amrita Joshi
- Graded Specialist (Ophthalmology), Army Hospital (R & R), Delhi Cantt, India
| | - P.M. Ginu
- Graded Specialist (Ophthalmology), Military Hospital Hisar, Hisar Cantt, India
| | - Alok Sati
- Senior Adviser (Ophthalmology), Army Hospital (R & R), Delhi Cantt, India
| | - Sonali V. Kumar
- Associate Professor (Ophthalmology), Army Hospital (R & R), Delhi Cantt, India
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16
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Wang X, Luan F, Yue H, Song C, Wang S, Feng J, Zhang X, Yang W, Li Y, Wei W, Tao Y. Recent advances of smart materials for ocular drug delivery. Adv Drug Deliv Rev 2023; 200:115006. [PMID: 37451500 DOI: 10.1016/j.addr.2023.115006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2023] [Revised: 07/04/2023] [Accepted: 07/06/2023] [Indexed: 07/18/2023]
Abstract
Owing to the variety and complexity of ocular diseases and the natural ocular barriers, drug therapy for ocular diseases has significant limitations, such as poor drug targeting to the site of the disease, poor drug penetration, and short drug retention time in the vitreous body. With the development of biotechnology, biomedical materials have reached the "smart" stage. To date, despite their inability to overcome all the aforementioned drawbacks, a variety of smart materials have been widely tested to treat various ocular diseases. This review analyses the most recent developments in multiple smart materials (inorganic particles, polymeric particles, lipid-based particles, hydrogels, and devices) to treat common ocular diseases and discusses the future directions and perspectives regarding clinical translation issues. This review can help researchers rationally design more smart materials for specific ocular applications.
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Affiliation(s)
- Xiaojun Wang
- Department of Ophthalmology, Beijing Chaoyang Hospital, Capital Medical University, Beijing 100020, PR China; State Key Laboratory of Biochemical Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, PR China
| | - Fuxiao Luan
- Department of Ophthalmology, Beijing Chaoyang Hospital, Capital Medical University, Beijing 100020, PR China; State Key Laboratory of Biochemical Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, PR China
| | - Hua Yue
- State Key Laboratory of Biochemical Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, PR China
| | - Cui Song
- State Key Laboratory of Biochemical Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, PR China
| | - Shuang Wang
- State Key Laboratory of Biochemical Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, PR China
| | - Jing Feng
- Department of Ophthalmology, Beijing Chaoyang Hospital, Capital Medical University, Beijing 100020, PR China
| | - Xiao Zhang
- State Key Laboratory of Biochemical Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, PR China
| | - Wei Yang
- State Key Laboratory of Biochemical Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, PR China
| | - Yuxin Li
- Department of Ophthalmology, Beijing Chaoyang Hospital, Capital Medical University, Beijing 100020, PR China; State Key Laboratory of Biochemical Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, PR China
| | - Wei Wei
- State Key Laboratory of Biochemical Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, PR China.
| | - Yong Tao
- Department of Ophthalmology, Beijing Chaoyang Hospital, Capital Medical University, Beijing 100020, PR China.
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17
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Wang L, Peng Y, Liu W, Ren L. Properties of Dual-Crosslinked Collagen-Based Membranes as Corneal Repair Material. J Funct Biomater 2023; 14:360. [PMID: 37504855 PMCID: PMC10381311 DOI: 10.3390/jfb14070360] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2023] [Revised: 06/21/2023] [Accepted: 07/07/2023] [Indexed: 07/29/2023] Open
Abstract
Corneal disease has become the second leading cause of blindness in the world. Corneal transplantation is currently considered to be one of the common treatments for vision loss. This paper presents a novel approach utilizing dual-crosslinked membranes composed of polyrotaxane multiple aldehydes (PRAs), 1-ethyl-3-(3-dimethylaminopropyl) carbodiimide (EDC), and N-hydroxysuccinimide (NHS) in the development process. Collagen was crosslinked, respectively, by EDC/NHS and PRAs to form stable amide bonds and imine groups. Through the formation of a double interpenetrating network, dual-crosslinked (Col-EDC-PRA) membranes exhibited enhanced resistance to collagenase degradation and superior mechanical properties compared to membranes crosslinked with a single crosslinker. Furthermore, Col-EDC-PRA membranes display favorable light transmittance and water content characteristics. Cell experiments showed that Col-EDC-PRA membranes were noncytotoxic and were not significantly different from other membranes. In a rabbit keratoplasty model, corneal stromal repair occurred at 5 months, evidenced by the presence of stromal cells and neo-stroma, as depicted in hematoxylin-eosin-stained histologic sections and optical coherence tomography images of the anterior segment. Moreover, there was no inflammation and corneal neovascularization, as well as no corneal rejection reaction in the surgical area. Overall, the results demonstrated that the dual-crosslinked membranes served effectively for corneal tissue regeneration after corneal defect.
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Affiliation(s)
- Lulu Wang
- Henan Provincial People's Hospital, Henan Eye Hospital, Zhengzhou University People's Hospital, Zhengzhou 450003, China
| | - Yuehai Peng
- National Engineering Research Center for Tissue Restoration and Reconstruction, Guangzhou 510006, China
- Guangzhou Proud Seeing Biotechnology Co., Ltd., Guangzhou 510623, China
- School of Biology and Biological Engineering, South China University of Technology, Guangzhou 510006, China
| | - Wenfang Liu
- National Engineering Research Center for Tissue Restoration and Reconstruction, Guangzhou 510006, China
- School of Materials Science and Engineering, South China University of Technology, Guangzhou 510006, China
| | - Li Ren
- National Engineering Research Center for Tissue Restoration and Reconstruction, Guangzhou 510006, China
- School of Materials Science and Engineering, South China University of Technology, Guangzhou 510006, China
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18
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Tran TM, Hou JH. Clinical applications of bioengineered tissue-cellular products for management of corneal diseases. Curr Opin Ophthalmol 2023; 34:311-323. [PMID: 37097181 DOI: 10.1097/icu.0000000000000961] [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: 04/26/2023]
Abstract
PURPOSE OF REVIEW To discuss bioengineered tissue-cellular products for treatment of corneal diseases that are currently in clinical use. These include tissue-cellular products that have received regulatory approval, are being used off-label in clinical practice, or are in active use in clinical trials. RECENT FINDINGS Due to the global shortage of donor corneal tissue, significant efforts have been made to develop bioengineering tissue-cellular products that can replace or augment the use of cadaveric tissue for corneal transplantation. The development of carrier substrates to support transplantation of cultivated limbal epithelial transplantation (CLET) has been a growing area of research. CLET offers a promising therapeutic alternative to conventional simple limbal epithelial transplantation and keratolimbal allografts for treatment of limbal stem cell deficiency. Engineered tissue matrices and porcine-derived corneas are potential alternatives to human donor tissue in anterior lamellar keratoplasty for corneal ulcers and scars, as well as intrastromal transplants for advanced keratoconus. For endothelial disease, substrate supported cultured endothelial cell grafts, and synthetic barrier devices are promising alternative to traditional endothelial keratoplasties. SUMMARY There has been increasing interest in cellular and acellular bioengineered tissue-cellular and synthetic products for treatment of corneal diseases, and many of these products have already seen clinical use. Industry and academia have important roles in advancing these products to later phase clinical trials and comparing them to conventional allograft approaches. Future development of full thickness donor corneas with cultivated epithelium, endothelium, and stromal keratocytes in a biosynthetic matrix will likely be an important next step in tissue alternatives. Continued progress in this field will be critical for addressing the global disease burden from corneal blindness.
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Affiliation(s)
- Tu M Tran
- Department of Ophthalmology and Visual Neurosciences, University of Minnesota, Minneapolis, Minnesota, USA
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19
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Vautier A, Bourges JL, Gabison E, Chaventre F, Lefevre S, Toubeau D, Arnoult C, Albou-Ganem C, Boyer O, Muraine M. An Efficient Technique for the Long-term Preservation of SMILE Lenticules Using Desiccation. J Refract Surg 2023; 39:491-498. [PMID: 37449510 DOI: 10.3928/1081597x-20230609-01] [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: 07/18/2023]
Abstract
PURPOSE To evaluate a desiccation protocol for the long-term preservation of human small incision lenticule extraction (SMILE) lenticules and to study their integration in an in vivo rabbit model. METHODS Lenticules were retrieved after SMILE procedures in patients, then desiccated according to a novel protocol. Histologic and electron microscopic analyses were performed. Six rabbit eyes received grafts with an inlay technique, which consisted of inserting a desiccated lenticule into a stromal pocket. Rabbits were killed at different times between 6 and 24 weeks. Rabbit corneas were analyzed using optical coherence tomography, histology, and DAPI staining. RESULTS Microscopic analysis of desiccated lenticules showed a preserved stromal architecture after rehydration. A decellularization of the lenticules after desiccation was observed without any chemical treatment. All rabbit corneas remained clear after grafting human lenticules and no rejection occurred. Optical coherence tomography showed regular lenticular implantation and no decrease in lenticule thickness. Histologic analysis showed no inflammatory infiltration around lenticules and no nuclear material inside lenticules after 6 months. CONCLUSIONS A favorable integration of desiccated human SMILE lenticules in rabbit corneas was observed. The refractive issue of lenticular implantation must be investigated next. Clinical trials are needed to evaluate the use of desiccated SMILE lenticules to treat hyperopia or keratoconus in humans. [J Refract Surg. 2023;39(7):491-498.].
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20
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Deshmukh R, Ong ZZ, Rampat R, Alió del Barrio JL, Barua A, Ang M, Mehta JS, Said DG, Dua HS, Ambrósio R, Ting DSJ. Management of keratoconus: an updated review. Front Med (Lausanne) 2023; 10:1212314. [PMID: 37409272 PMCID: PMC10318194 DOI: 10.3389/fmed.2023.1212314] [Citation(s) in RCA: 8] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2023] [Accepted: 05/30/2023] [Indexed: 07/07/2023] Open
Abstract
Keratoconus is the most common corneal ectatic disorder. It is characterized by progressive corneal thinning with resultant irregular astigmatism and myopia. Its prevalence has been estimated at 1:375 to 1:2,000 people globally, with a considerably higher rate in the younger populations. Over the past two decades, there was a paradigm shift in the management of keratoconus. The treatment has expanded significantly from conservative management (e.g., spectacles and contact lenses wear) and penetrating keratoplasty to many other therapeutic and refractive modalities, including corneal cross-linking (with various protocols/techniques), combined CXL-keratorefractive surgeries, intracorneal ring segments, anterior lamellar keratoplasty, and more recently, Bowman's layer transplantation, stromal keratophakia, and stromal regeneration. Several recent large genome-wide association studies (GWAS) have identified important genetic mutations relevant to keratoconus, facilitating the development of potential gene therapy targeting keratoconus and halting the disease progression. In addition, attempts have been made to leverage the power of artificial intelligence-assisted algorithms in enabling earlier detection and progression prediction in keratoconus. In this review, we provide a comprehensive overview of the current and emerging treatment of keratoconus and propose a treatment algorithm for systematically guiding the management of this common clinical entity.
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Affiliation(s)
- Rashmi Deshmukh
- Department of Cornea and Refractive Surgery, LV Prasad Eye Institute, Hyderabad, India
| | - Zun Zheng Ong
- Department of Ophthalmology, Queen’s Medical Centre, Nottingham, United Kingdom
| | - Radhika Rampat
- Department of Ophthalmology, Royal Free London NHS Foundation Trust, London, United Kingdom
| | - Jorge L. Alió del Barrio
- Cornea, Cataract and Refractive Surgery Unit, Vissum (Miranza Group), Alicante, Spain
- Division of Ophthalmology, School of Medicine, Universidad Miguel Hernández, Alicante, Spain
| | - Ankur Barua
- Birmingham and Midland Eye Centre, Birmingham, United Kingdom
| | - Marcus Ang
- Singapore National Eye Centre, Singapore Eye Research Institute, Singapore, Singapore
| | - Jodhbir S. Mehta
- Singapore National Eye Centre, Singapore Eye Research Institute, Singapore, Singapore
| | - Dalia G. Said
- Department of Ophthalmology, Queen’s Medical Centre, Nottingham, United Kingdom
- Academic Ophthalmology, School of Medicine, University of Nottingham, Nottingham, United Kingdom
| | - Harminder S. Dua
- Department of Ophthalmology, Queen’s Medical Centre, Nottingham, United Kingdom
- Academic Ophthalmology, School of Medicine, University of Nottingham, Nottingham, United Kingdom
| | - Renato Ambrósio
- Department of Cornea and Refractive Surgery, Instituto de Olhos Renato Ambrósio, Rio de Janeiro, Brazil
- Department of Ophthalmology, Federal University of the State of Rio de Janeiro (UNIRIO), Rio de Janeiro, Brazil
- Federal University of São Paulo (UNIFESP), São Paulo, Brazil
| | - Darren Shu Jeng Ting
- Birmingham and Midland Eye Centre, Birmingham, United Kingdom
- Academic Ophthalmology, School of Medicine, University of Nottingham, Nottingham, United Kingdom
- Academic Unit of Ophthalmology, Institute of Inflammation and Ageing, College of Medical and Dental Sciences, University of Birmingham, Birmingham, United Kingdom
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21
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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: 4] [Impact Index Per Article: 4.0] [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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22
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Pramanik B, Islam MM, Patra HK. Rational design of peptide-based implants for corneal bioengineering. Curr Opin Biotechnol 2023; 81:102947. [PMID: 37163824 DOI: 10.1016/j.copbio.2023.102947] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2023] [Revised: 03/23/2023] [Accepted: 03/27/2023] [Indexed: 05/12/2023]
Abstract
Regeneration of damaged cornea can save vision for millions of patients. Most of these patients are waiting for transplantation of a donor cornea or suitable substitute to restore vision. Although donor cornea transplantation is the most clinically accepted treatment, shortage of donor cornea results in almost 69 out of every 70 patients untreated with the waiting list for transplantation drastically increasing every year according to a prepandemic estimation. Therefore, corneal replacements are coming up as a cutting-edge alternative strategy. In view of the peptides, especially collagen-like peptides and peptide amphiphiles with bioactive functional motifs demonstrate promising avenue for the corneal tissue engineering and promoting regeneration, by their hierarchical self-assembling propensity to acquire desired nano- to macroscale 3D architecture. Here, we analyze rational peptide designing, self-assembly, and strategies of peptide/peptide-based nanoscale building blocks to create the extracellular matrix mimetic implants for functional regeneration of the cornea.
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Affiliation(s)
- Bapan Pramanik
- Department of Chemistry, Ben Gurion University of the Negev, Be'er Sheva 84105, Israel; School of Pharmacy, University of Nottingham, NG7 2RD Nottingham, United Kingdom
| | - Mohammad M Islam
- Department of Ophthalmology, Massachusetts Eye and Ear and Schepens Eye Research Institute, Harvard Medical School, Boston, MA 02114, USA
| | - Hirak K Patra
- Department of Surgical Biotechnology, Division of Surgery and Interventional Science, University College London, NW3 2PF, United Kingdom.
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23
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Li H, Chen X, Ren K, Wu L, Chen G, Xu L. Qualitative study on diabetic cutaneous wound healing with radiation crosslinked bilayer collagen scaffold in rat model. Sci Rep 2023; 13:6399. [PMID: 37076561 PMCID: PMC10115801 DOI: 10.1038/s41598-023-33372-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2022] [Accepted: 04/12/2023] [Indexed: 04/21/2023] Open
Abstract
Diabetes may leave patients more prone to skin problems, and minor skin conditions can more easily turn into serious damage to the extracellular matrix, which further impairs the skin's mechanical properties and delays wound healing. Therefore, the aim of the work is to develop extracellular matrix substitution to remodel the mechanical properties of diabetic cutaneous wound and thus accelerate diabetic wound healing. A green fabrication approach was used to prepare radiation crosslinked bilayer collagen scaffold from collagen dispersion. The morphological, mechanical and swelling characteristics of radiation crosslinked bilayer collagen scaffold were assessed to be suitable for cutaneous wound remodeling. The feasibility of radiation crosslinked bilayer collagen scaffold was performed on full-skin defect of streptozotocin-induced diabetic rats. The tissue specimens were harvested after 7, 14, and 21 days. Histopathological analysis showed that radiation crosslinked bilayer collagen scaffold has beneficial effects on inducing skin regeneration and remodeling in diabetic rats. In addition, immunohistochemical staining further revealed that the radiation crosslinked bilayer collagen scaffold could not only significantly accelerate the diabetic wound healing, but also promote angiogenesis factor (CD31) production. Vascularization was observed as early as day 7. The work expands the therapeutic ideas for cutaneous wound healing in diabetes.
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Affiliation(s)
- Hongwei Li
- State Key Laboratory of Molecular Vaccinology and Molecular Diagnostics, Department of Laboratory Medicine, School of Public Heath, Xiamen University, Xiamen, 361102, People's Republic of China
| | - Xin Chen
- Department of Burn, Beijing Jishuitan Hospital, Beijing, 100035, People's Republic of China
| | - Kang Ren
- State Key Laboratory of Molecular Vaccinology and Molecular Diagnostics, Department of Laboratory Medicine, School of Public Heath, Xiamen University, Xiamen, 361102, People's Republic of China
| | - Lihao Wu
- State Key Laboratory of Molecular Vaccinology and Molecular Diagnostics, Department of Laboratory Medicine, School of Public Heath, Xiamen University, Xiamen, 361102, People's Republic of China
| | - Gong Chen
- State Key Laboratory of Molecular Vaccinology and Molecular Diagnostics, Department of Laboratory Medicine, School of Public Heath, Xiamen University, Xiamen, 361102, People's Republic of China
| | - Ling Xu
- State Key Laboratory of Molecular Vaccinology and Molecular Diagnostics, Department of Laboratory Medicine, School of Public Heath, Xiamen University, Xiamen, 361102, People's Republic of China.
- Shenzhen Research Institute of Xiamen University, Shenzhen, 51800, People's Republic of China.
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24
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Short S, Lewik G, Issa F. Research Highlights. Transplantation 2023; 107:797-798. [PMID: 37779390 DOI: 10.1097/tp.0000000000004605] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/03/2023]
Affiliation(s)
- Sarah Short
- Nuffield Department of Surgical Sciences, University of Oxford, Oxford, United Kingdom
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25
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Saadeldin IM, Tanga BM, Bang S, Seo C, Maigoro AY, Kang H, Cha D, Yun SH, Kim SI, Lee S, Cho J. Isolation, characterization, proteome, miRNAome, and the embryotrophic effects of chicken egg yolk nanovesicles (vitellovesicles). Sci Rep 2023; 13:4204. [PMID: 36918605 PMCID: PMC10014936 DOI: 10.1038/s41598-023-31012-0] [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] [Received: 11/30/2022] [Accepted: 03/06/2023] [Indexed: 03/16/2023] Open
Abstract
Egg yolk constitutes about a third of the structure of the chicken egg however, the molecular structure and physiological effects of egg yolk-derived lipid membranous vesicles are not clearly understood. In this study, for the first record, the egg yolk nanovesicles (vitellovesicles, VVs) were isolated, characterized, and used as a supplement for porcine embryo culture. Yolks of ten freshly oviposited eggs were filtered and ultracentrifuged at 100,000 × g for 3 h to obtain a pellet. Cryogenic transmission electron microscopy and nanoparticle tracking analysis of the pellet revealed bilipid membranous vesicles. Protein contents of the pellet were analyzed using tandem mass spectrometry and the miRNA content was also profiled through BGISEQ-500 sequencer. VVs were supplemented with the in vitro culture medium of day-7 hatched parthenogenetic blastocysts. After 2 days of blastocyst culture, the embryonic cell count was increased in VVs supplemented embryos in comparison to the non-supplemented embryos. TUNEL assay showed that apoptotic cells were increased in control groups when compared with the VVs supplemented group. Reduced glutathione was increased by 2.5 folds in the VVs supplemented group while reactive oxygen species were increased by 5.3 folds in control groups. Quantitative PCR analysis showed that VVs significantly increased the expression of lipid metabolism-associated genes (monoglyceride lipase and lipase E), anti-apoptotic gene (BCL2), and superoxide dismutase, while significantly reducing apoptotic gene (BAX). Culturing embryos on Matrigel basement membrane matrix indicated that VVs significantly enhanced embryo attachment and embryonic stem cell outgrowths compared to the non-supplemented group. This considers the first report to characterize the molecular bioactive cargo contents of egg yolk nanovesicles to show their embryotrophic effect on mammalian embryos. This effect might be attributed to the protein and miRNA cargo contents of VVs. VVs can be used for the formulation of in vitro culture medium for mammalian embryos including humans.
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Affiliation(s)
- Islam M Saadeldin
- Laboratory of Theriogenology, College of Veterinary Medicine, Chungnam National University, 99, Daehak-Ro, Daejeon, 34134, Republic of Korea.
- Research Institute of Veterinary Medicine, Chungnam National University, Daejeon, 34134, Republic of Korea.
| | - Bereket Molla Tanga
- Laboratory of Theriogenology, College of Veterinary Medicine, Chungnam National University, 99, Daehak-Ro, Daejeon, 34134, Republic of Korea
| | - Seonggyu Bang
- Laboratory of Theriogenology, College of Veterinary Medicine, Chungnam National University, 99, Daehak-Ro, Daejeon, 34134, Republic of Korea
| | - Chaerim Seo
- Laboratory of Theriogenology, College of Veterinary Medicine, Chungnam National University, 99, Daehak-Ro, Daejeon, 34134, Republic of Korea
| | - Abdulkadir Y Maigoro
- Department of Microbiology and Molecular Biology, College of Bioscience and Biotechnology, Chungnam National University, Daejeon, 34134, Republic of Korea
| | - Heejae Kang
- Laboratory of Theriogenology, College of Veterinary Medicine, Chungnam National University, 99, Daehak-Ro, Daejeon, 34134, Republic of Korea
| | - Dabin Cha
- Laboratory of Theriogenology, College of Veterinary Medicine, Chungnam National University, 99, Daehak-Ro, Daejeon, 34134, Republic of Korea
| | - Sung Ho Yun
- Korea Basic Science Institute (KBSI), Ochang, 28119, Republic of Korea
| | - Seung Il Kim
- Korea Basic Science Institute (KBSI), Ochang, 28119, Republic of Korea
| | - Sanghoon Lee
- Laboratory of Theriogenology, College of Veterinary Medicine, Chungnam National University, 99, Daehak-Ro, Daejeon, 34134, Republic of Korea
| | - Jongki Cho
- Laboratory of Theriogenology, College of Veterinary Medicine, Chungnam National University, 99, Daehak-Ro, Daejeon, 34134, Republic of Korea.
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26
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Abstract
Collagen is commonly used as a regenerative biomaterial due to its excellent biocompatibility and wide distribution in tissues. Different kinds of hybridization or cross-links are favored to offer improvements to satisfy various needs of biomedical applications. Previous reviews have been made to introduce the sources and structures of collagen. In addition, biological and mechanical properties of collagen-based biomaterials, their modification and application forms, and their interactions with host tissues are pinpointed. However, there is still no review about collagen-based biomaterials for tissue engineering. Therefore, we aim to summarize and discuss the progress of collagen-based materials for tissue regeneration applications in this review. We focus on the utilization of collagen-based biomaterials for bones, cartilages, skin, dental, neuron, cornea, and urological applications and hope these experiences and outcomes can provide inspiration and practical techniques for the future development of collagen-based biomaterials in related application fields. Moreover, future improving directions and challenges for collagen-based biomaterials are proposed as well.
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Affiliation(s)
- Yiyu Wang
- Department of Prosthodontics, The Second Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou 310029, China
| | - Zhengke Wang
- MOE Key Laboratory of Macromolecular Synthesis and Functionalization, Department of Polymer Science and Engineering, Zhejiang University, Hangzhou 310027, China
- Department of Hepatobiliary and Pancreatic Surgery, The Second Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou 310029, China
| | - Yan Dong
- Department of Prosthodontics, The Second Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou 310029, China
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27
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Li S, Ma X, Zhang Y, Qu Y, Wang L, Ye L. Applications of hydrogel materials in different types of corneal wounds. Surv Ophthalmol 2023:S0039-6257(23)00040-1. [PMID: 36854372 DOI: 10.1016/j.survophthal.2023.02.005] [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: 08/10/2022] [Revised: 02/20/2023] [Accepted: 02/21/2023] [Indexed: 02/27/2023]
Abstract
Severe corneal injury can lead to a decrease in light transmission and even blindness. Currently, corneal transplantation has been applied as the primary treatment for corneal blindness; however, the worldwide shortage of suitable corneal donor tissue means that a large proportion of patients have no access to corneal transplants. This situation has contributed to the rapid development of various corneal substitutes. The development and optimization of novel hydrogels that aim to replace partial or full-thickness pathological corneas have advanced in the last decade. Meanwhile, with the help of 3D bioprinting technology, hydrogel materials can be molded to a refined and controllable shape, attracting many scientists to the field of corneal reconstruction research. Although hydrogels are not yet available as a substitute for traditional clinical methods of corneal diseases, their rapid development makes us confident that they will be in the near future. We summarize the application of hydrogel materials for various types of corneal injuries frequently encountered in clinical practice, especially focusing on animal experiments and preclinical studies. Finally, we discuss the development and achievements of 3D bioprinting in the treatment of corneal injury.
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Affiliation(s)
- Shixu Li
- Shenzhen Eye Hospital, Jinan University, Shenzhen, China; Shenzhen Eye Institute, Shenzhen, China
| | - Xudai Ma
- Shenzhen Eye Hospital, Jinan University, Shenzhen, China; Shenzhen Eye Institute, Shenzhen, China
| | - Yongxin Zhang
- Shenzhen Eye Hospital, Jinan University, Shenzhen, China; Shenzhen Eye Institute, Shenzhen, China
| | - Yunhao Qu
- Shenzhen Eye Hospital, Jinan University, Shenzhen, China; Shenzhen Eye Institute, Shenzhen, China
| | - Ling Wang
- Shenzhen Eye Hospital, Jinan University, Shenzhen, China; Shenzhen Eye Institute, Shenzhen, China.
| | - Lin Ye
- Shenzhen Eye Hospital, Jinan University, Shenzhen, China; Shenzhen Eye Institute, Shenzhen, China.
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28
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Alves AL, Carvalho AC, Machado I, Diogo GS, Fernandes EM, Castro VIB, Pires RA, Vázquez JA, Pérez-Martín RI, Alaminos M, Reis RL, Silva TH. Cell-Laden Marine Gelatin Methacryloyl Hydrogels Enriched with Ascorbic Acid for Corneal Stroma Regeneration. BIOENGINEERING (BASEL, SWITZERLAND) 2023; 10:bioengineering10010062. [PMID: 36671634 PMCID: PMC9854711 DOI: 10.3390/bioengineering10010062] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/02/2022] [Revised: 12/27/2022] [Accepted: 12/30/2022] [Indexed: 01/06/2023]
Abstract
Corneal pathologies from infectious or noninfectious origin have a significant impact on the daily lives of millions of people worldwide. Despite the risk of organ rejection or infection, corneal transplantation is currently the only effective treatment. Finding safe and innovative strategies is the main goal of tissue-engineering-based approaches. In this study, the potential of gelatin methacryloyl (GelMA) hydrogels produced from marine-derived gelatin and loaded with ascorbic acid (as an enhancer of the biological activity of cells) was evaluated for corneal stromal applications. Marine GelMA was synthesized with a methacrylation degree of 75%, enabling effective photocrosslinking, and hydrogels with or without ascorbic acid were produced, encompassing human keratocytes. All the produced formulations exhibited excellent optical and swelling properties with easy handling as well as structural stability and adequate degradation rates that may allow proper extracellular matrix remodeling by corneal stromal cells. Formulations loaded with 0.5 mg/mL of ascorbic acid enhanced the biological performance of keratocytes and induced collagen production. These results suggest that, in addition to marine-derived gelatin being suitable for the synthesis of GelMA, the hydrogels produced are promising biomaterials for corneal regeneration applications.
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Affiliation(s)
- Ana L. Alves
- 3B’s Research Group, i3B’s—Research Institute on Biomaterials, Bisodegradables and Biomimetics, University of Minho, Headquarters of the European Institute of Excellence on Tissue Engineering and Regenerative Medicine, AvePark, Parque de Ciência e Tecnologia, Zona Industrial da Gandra, 4805-017 Guimarães, Portugal
- ICVS/3B’s—PT Government Associate Laboratory, 4806-909 Braga/Guimarães, Portugal
| | - Ana C. Carvalho
- 3B’s Research Group, i3B’s—Research Institute on Biomaterials, Bisodegradables and Biomimetics, University of Minho, Headquarters of the European Institute of Excellence on Tissue Engineering and Regenerative Medicine, AvePark, Parque de Ciência e Tecnologia, Zona Industrial da Gandra, 4805-017 Guimarães, Portugal
- ICVS/3B’s—PT Government Associate Laboratory, 4806-909 Braga/Guimarães, Portugal
| | - Inês Machado
- 3B’s Research Group, i3B’s—Research Institute on Biomaterials, Bisodegradables and Biomimetics, University of Minho, Headquarters of the European Institute of Excellence on Tissue Engineering and Regenerative Medicine, AvePark, Parque de Ciência e Tecnologia, Zona Industrial da Gandra, 4805-017 Guimarães, Portugal
- ICVS/3B’s—PT Government Associate Laboratory, 4806-909 Braga/Guimarães, Portugal
| | - Gabriela S. Diogo
- 3B’s Research Group, i3B’s—Research Institute on Biomaterials, Bisodegradables and Biomimetics, University of Minho, Headquarters of the European Institute of Excellence on Tissue Engineering and Regenerative Medicine, AvePark, Parque de Ciência e Tecnologia, Zona Industrial da Gandra, 4805-017 Guimarães, Portugal
- ICVS/3B’s—PT Government Associate Laboratory, 4806-909 Braga/Guimarães, Portugal
| | - Emanuel M. Fernandes
- 3B’s Research Group, i3B’s—Research Institute on Biomaterials, Bisodegradables and Biomimetics, University of Minho, Headquarters of the European Institute of Excellence on Tissue Engineering and Regenerative Medicine, AvePark, Parque de Ciência e Tecnologia, Zona Industrial da Gandra, 4805-017 Guimarães, Portugal
- ICVS/3B’s—PT Government Associate Laboratory, 4806-909 Braga/Guimarães, Portugal
| | - Vânia I. B. Castro
- 3B’s Research Group, i3B’s—Research Institute on Biomaterials, Bisodegradables and Biomimetics, University of Minho, Headquarters of the European Institute of Excellence on Tissue Engineering and Regenerative Medicine, AvePark, Parque de Ciência e Tecnologia, Zona Industrial da Gandra, 4805-017 Guimarães, Portugal
- ICVS/3B’s—PT Government Associate Laboratory, 4806-909 Braga/Guimarães, Portugal
| | - Ricardo A. Pires
- 3B’s Research Group, i3B’s—Research Institute on Biomaterials, Bisodegradables and Biomimetics, University of Minho, Headquarters of the European Institute of Excellence on Tissue Engineering and Regenerative Medicine, AvePark, Parque de Ciência e Tecnologia, Zona Industrial da Gandra, 4805-017 Guimarães, Portugal
- ICVS/3B’s—PT Government Associate Laboratory, 4806-909 Braga/Guimarães, Portugal
| | - José A. Vázquez
- Group of Recycling and Valorization of Waste Materials (REVAL), Instituto de Investigaciones Marinas (IIM-CSIC), C/Eduardo Cabello 6, CP36208 Vigo, Spain
| | - Ricardo I. Pérez-Martín
- Group of Food Biochemistry, Instituto de Investigaciones Marinas (IIM-CSIC), C/Eduardo Cabello 6, CP36208 Vigo, Spain
| | - Miguel Alaminos
- Department of Histology and Tissue Engineering Group, Faculty of Medicine, University of Granada and Instituto de Investigación Biosanitaria (ibs.GRANADA), E18016 Granada, Spain
| | - Rui L. Reis
- 3B’s Research Group, i3B’s—Research Institute on Biomaterials, Bisodegradables and Biomimetics, University of Minho, Headquarters of the European Institute of Excellence on Tissue Engineering and Regenerative Medicine, AvePark, Parque de Ciência e Tecnologia, Zona Industrial da Gandra, 4805-017 Guimarães, Portugal
- ICVS/3B’s—PT Government Associate Laboratory, 4806-909 Braga/Guimarães, Portugal
| | - Tiago H. Silva
- 3B’s Research Group, i3B’s—Research Institute on Biomaterials, Bisodegradables and Biomimetics, University of Minho, Headquarters of the European Institute of Excellence on Tissue Engineering and Regenerative Medicine, AvePark, Parque de Ciência e Tecnologia, Zona Industrial da Gandra, 4805-017 Guimarães, Portugal
- ICVS/3B’s—PT Government Associate Laboratory, 4806-909 Braga/Guimarães, Portugal
- Correspondence:
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29
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Blanco-Elices C, Morales-Álvarez C, Chato-Astrain J, González-Gallardo C, Ávila-Fernández P, Campos F, Carmona R, Martín-Piedra MÁ, Garzón I, Alaminos M. Development of stromal differentiation patterns in heterotypical models of artificial corneas generated by tissue engineering. Front Bioeng Biotechnol 2023; 11:1124995. [PMID: 37034263 PMCID: PMC10076743 DOI: 10.3389/fbioe.2023.1124995] [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: 12/15/2022] [Accepted: 03/16/2023] [Indexed: 04/11/2023] Open
Abstract
Purpose: We carried out a histological characterization analysis of the stromal layer of human heterotypic cornea substitutes generated with extra-corneal cells to determine their putative usefulness in tissue engineering. Methods: Human bioartificial corneas were generated using nanostructured fibrin-agarose biomaterials with corneal stromal cells immersed within. To generate heterotypical corneas, umbilical cord Wharton's jelly stem cells (HWJSC) were cultured on the surface of the stromal substitutes to obtain an epithelial-like layer. These bioartificial corneas were compared with control native human corneas and with orthotypical corneas generated with human corneal epithelial cells on top of the stromal substitute. Both the corneal stroma and the basement membrane were analyzed using histological, histochemical and immunohistochemical methods in samples kept in culture and grafted in vivo for 12 months in the rabbit cornea. Results: Our results showed that the stroma of the bioartificial corneas kept ex vivo showed very low levels of fibrillar and non-fibrillar components of the tissue extracellular matrix. However, in vivo implantation resulted in a significant increase of the contents of collagen, proteoglycans, decorin, keratocan and lumican in the corneal stroma, showing higher levels of maturation and spatial organization of these components. Heterotypical corneas grafted in vivo for 12 months showed significantly higher contents of collagen fibers, proteoglycans and keratocan. When the basement membrane was analyzed, we found that all corneas grafted in vivo showed intense PAS signal and higher contents of nidogen-1, although the levels found in human native corneas was not reached, and a rudimentary basement membrane was observed using transmission electron microscopy. At the epithelial level, HWJSC used to generate an epithelial-like layer in ex vivo corneas were mostly negative for p63, whereas orthotypical corneas and heterotypical corneas grafted in vivo were positive. Conclusion: These results support the possibility of generating bioengineered artificial corneas using non-corneal HWJSC. Although heterotypical corneas were not completely biomimetic to the native human corneas, especially ex vivo, in vivo grafted corneas demonstrated to be highly biocompatible, and the animal cornea became properly differentiated at the stroma and basement membrane compartments. These findings open the door to the future clinical use of these bioartificial corneas.
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Affiliation(s)
- Cristina Blanco-Elices
- Tissue Engineering Group, Department of Histology, Faculty of Medicine, Universidad de Granada, Granada, Spain
- Instituto de Investigación Biosanitaria ibs.GRANADA, Granada, Spain
| | - Carmen Morales-Álvarez
- GENYO, Centre for Genomics and Oncological Research: Pfizer, University of Granada, Andalusian Regional Government, PTS Granada, Granada, Spain
- Department of Biochemistry and Molecular Biology III, Faculty of Medicine, University of Granada, Granada, Spain
| | - Jesús Chato-Astrain
- Tissue Engineering Group, Department of Histology, Faculty of Medicine, Universidad de Granada, Granada, Spain
- Instituto de Investigación Biosanitaria ibs.GRANADA, Granada, Spain
| | | | - Paula Ávila-Fernández
- Tissue Engineering Group, Department of Histology, Faculty of Medicine, Universidad de Granada, Granada, Spain
| | - Fernando Campos
- Tissue Engineering Group, Department of Histology, Faculty of Medicine, Universidad de Granada, Granada, Spain
- Instituto de Investigación Biosanitaria ibs.GRANADA, Granada, Spain
| | - Ramón Carmona
- Department of Cell Biology, Faculty of Sciences, University of Granada, Granada, Spain
| | - Miguel Ángel Martín-Piedra
- Tissue Engineering Group, Department of Histology, Faculty of Medicine, Universidad de Granada, Granada, Spain
- Instituto de Investigación Biosanitaria ibs.GRANADA, Granada, Spain
- *Correspondence: Miguel Ángel Martín-Piedra, ; Ingrid Garzón,
| | - Ingrid Garzón
- Tissue Engineering Group, Department of Histology, Faculty of Medicine, Universidad de Granada, Granada, Spain
- Instituto de Investigación Biosanitaria ibs.GRANADA, Granada, Spain
- *Correspondence: Miguel Ángel Martín-Piedra, ; Ingrid Garzón,
| | - Miguel Alaminos
- Tissue Engineering Group, Department of Histology, Faculty of Medicine, Universidad de Granada, Granada, Spain
- Instituto de Investigación Biosanitaria ibs.GRANADA, Granada, Spain
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Mörö A, Samanta S, Honkamäki L, Rangasami VK, Puistola P, Kauppila M, Narkilahti S, Miettinen S, Oommen O, Skottman H. Hyaluronic acid based next generation bioink for 3D bioprinting of human stem cell derived corneal stromal model with innervation. Biofabrication 2022; 15. [PMID: 36579828 DOI: 10.1088/1758-5090/acab34] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2022] [Accepted: 12/13/2022] [Indexed: 12/15/2022]
Abstract
Corneal transplantation remains gold standard for the treatment of severe cornea diseases, however, scarcity of donor cornea is a serious bottleneck. 3D bioprinting holds tremendous potential for cornea tissue engineering (TE). One of the key technological challenges is to design bioink compositions with ideal printability and cytocompatibility. Photo-crosslinking and ionic crosslinking are often used for the stabilization of 3D bioprinted structures, which can possess limitations on biological functionality of the printed cells. Here, we developed a hyaluronic acid-based dopamine containing bioink using hydrazone crosslinking chemistry for the 3D bioprinting of corneal equivalents. First, the shear thinning property, viscosity, and mechanical stability of the bioink were optimized before extrusion-based 3D bioprinting for the shape fidelity and self-healing property characterizations. Subsequently, human adipose stem cells (hASCs) and hASC-derived corneal stromal keratocytes were used for bioprinting corneal stroma structures and their cell viability, proliferation, microstructure and expression of key proteins (lumican, vimentin, connexin 43,α-smooth muscle actin) were evaluated. Moreover, 3D bioprinted stromal structures were implanted intoex vivoporcine cornea to explore tissue integration. Finally, human pluripotent stem cell derived neurons (hPSC-neurons), were 3D bioprinted to the periphery of the corneal structures to analyze innervation. The bioink showed excellent shear thinning property, viscosity, printability, shape fidelity and self-healing properties with high cytocompatibility. Cells in the printed structures displayed good tissue formation and 3D bioprinted cornea structures demonstrated excellentex vivointegration to host tissue as well asin vitroinnervation. The developed bioink and the printed cornea stromal equivalents hold great potential for cornea TE applications.
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Affiliation(s)
- Anni Mörö
- Eye Regeneration Group, Faculty of Medicine and Health Technology, Tampere University, Tampere 33520, Finland
| | - Sumanta Samanta
- Bioengineering and Nanomedicine Lab, Faculty of Medicine and Health Technology, University, Tampere 33720, Finland
| | - Laura Honkamäki
- Neuro Group, Faculty of Medicine and Health Technology, Tampere University, Tampere 33520, Finland
| | - Vignesh K Rangasami
- Bioengineering and Nanomedicine Lab, Faculty of Medicine and Health Technology, University, Tampere 33720, Finland
| | - Paula Puistola
- Eye Regeneration Group, Faculty of Medicine and Health Technology, Tampere University, Tampere 33520, Finland
| | - Maija Kauppila
- Eye Regeneration Group, Faculty of Medicine and Health Technology, Tampere University, Tampere 33520, Finland
| | - Susanna Narkilahti
- Neuro Group, Faculty of Medicine and Health Technology, Tampere University, Tampere 33520, Finland
| | - Susanna Miettinen
- Adult Stem Cell Group, Faculty of Medicine and Health Technology, Tampere University, Tampere 33520, Finland.,Research, Development and Innovation Centre, Tampere University Hospital, Tampere 33520, Finland
| | - Oommen Oommen
- Bioengineering and Nanomedicine Lab, Faculty of Medicine and Health Technology, University, Tampere 33720, Finland
| | - Heli Skottman
- Eye Regeneration Group, Faculty of Medicine and Health Technology, Tampere University, Tampere 33520, Finland
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Ilic D, Liovic M. Industry updates from the field of stem cell research and regenerative medicine in August 2022. Regen Med 2022. [PMID: 36222015 DOI: 10.2217/rme-2022-0166] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Latest developments in the field of stem cell research and regenerative medicine compiled from publicly available information and press releases from non-academic institutions in August 2022.
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Affiliation(s)
- Dusko Ilic
- Department of Women & Children's Health, Stem Cell Laboratories, Guy' Assisted Conception Unit, Faculty of Life Sciences & Medicine, King's College London, London, SE1 9RT, UK
| | - Mirjana Liovic
- Medical Center for Molecular Biology, Faculty of Medicine, University of Ljubljana, Ljubljana, 1000, Slovenia
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32
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Khan N. “Pig skin corneal tissue: A new hope for Low Middle-Income Countries?”. Ann Med Surg (Lond) 2022; 82:104630. [PMID: 36124221 PMCID: PMC9482120 DOI: 10.1016/j.amsu.2022.104630] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2022] [Accepted: 09/04/2022] [Indexed: 12/01/2022] Open
Affiliation(s)
- Naima Khan
- Corresponding author. Flat 6, 65/c, 11 th Commercial Street, D.H.A Phase II Extension, Karachi, Sindh, Pakistan.
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