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Wang X, Shakeel A, Salih AE, Vurivi H, Daoud S, Desidery L, Khan RL, Shibru MG, Ali ZM, Butt H, Chan V, Corridon PR. A scalable corneal xenograft platform: simultaneous opportunities for tissue engineering and circular economic sustainability by repurposing slaughterhouse waste. Front Bioeng Biotechnol 2023; 11:1133122. [PMID: 37180037 PMCID: PMC10168539 DOI: 10.3389/fbioe.2023.1133122] [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: 01/06/2023] [Accepted: 04/17/2023] [Indexed: 05/15/2023] Open
Abstract
Introduction: Corneal disease is a leading cause of blindness globally that stems from various etiologies. High-throughput platforms that can generate substantial quantities of corneal grafts will be invaluable in addressing the existing global demand for keratoplasty. Slaughterhouses generate substantial quantities of underutilized biological waste that can be repurposed to reduce current environmentally unfriendly practices. Such efforts to support sustainability can simultaneously drive the development of bioartificial keratoprostheses. Methods: Scores of discarded eyes from the prominent Arabian sheep breeds in our surrounding region of the United Arab Emirates (UAE) were repurposed to generate native and acellular corneal keratoprostheses. Acellular corneal scaffolds were created using a whole-eye immersion/agitation-based decellularization technique with a widely available, eco-friendly, and inexpensive 4% zwitterionic biosurfactant solution (Ecover, Malle, Belgium). Conventional approaches like DNA quantification, ECM fibril organization, scaffold dimensions, ocular transparency and transmittance, surface tension measurements, and Fourier-transform infrared (FTIR) spectroscopy were used to examine corneal scaffold composition. Results: Using this high-throughput system, we effectively removed over 95% of the native DNA from native corneas while retaining the innate microarchitecture that supported substantial light transmission (over 70%) after reversing opacity, a well-established hallmark of decellularization and long-term native corneal storage, with glycerol. FTIR data revealed the absence of spectral peaks in the frequency range 2849 cm-1 to 3075 cm-1, indicating the effective removal of the residual biosurfactant post-decellularization. Surface tension studies confirmed the FTIR data by capturing the surfactant's progressive and effectual removal through tension measurements ranging from approximately 35 mN/m for the 4% decellularizing agent to 70 mN/m for elutes highlighting the effective removal of the detergent. Discussion: To our knowledge, this is the first dataset to be generated outlining a platform that can produce dozens of ovine acellular corneal scaffolds that effectively preserve ocular transparency, transmittance, and ECM components using an eco-friendly surfactant. Analogously, decellularization technologies can support corneal regeneration with attributes comparable to native xenografts. Thus, this study presents a simplified, inexpensive, and scalable high-throughput corneal xenograft platform to support tissue engineering, regenerative medicine, and circular economic sustainability.
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Affiliation(s)
- Xinyu Wang
- Biomedical Engineering and Healthcare Engineering Innovation Center, Khalifa University, Abu Dhabi, United Arab Emirates
- Department of Immunology and Physiology, College of Medicine and Health Sciences, Khalifa University of Science and Technology, Abu Dhabi, United Arab Emirates
| | - Adeeba Shakeel
- Department of Immunology and Physiology, College of Medicine and Health Sciences, Khalifa University of Science and Technology, Abu Dhabi, United Arab Emirates
| | - Ahmed E. Salih
- Department of Mechanical Engineering, College of Medicine and Health Sciences, Khalifa University of Science and Technology, Abu Dhabi, United Arab Emirates
| | - Hema Vurivi
- Center for Biotechnology, Khalifa University of Science and Technology, Abu Dhabi, United Arab Emirates
| | - Sayel Daoud
- Anatomical Pathology Laboratory, Cleveland Clinic Abu Dhabi, Abu Dhabi, United Arab Emirates
| | - Luca Desidery
- Department of Civil Infrastructure and Environmental Engineering, College of Engineering, Khalifa University of Science and Technology, Abu Dhabi, United Arab Emirates
| | - Raheema L. Khan
- Department of Immunology and Physiology, College of Medicine and Health Sciences, Khalifa University of Science and Technology, Abu Dhabi, United Arab Emirates
| | - Meklit G. Shibru
- Department of Immunology and Physiology, College of Medicine and Health Sciences, Khalifa University of Science and Technology, Abu Dhabi, United Arab Emirates
| | - Zehara M. Ali
- Department of Immunology and Physiology, College of Medicine and Health Sciences, Khalifa University of Science and Technology, Abu Dhabi, United Arab Emirates
| | - Haider Butt
- Department of Mechanical Engineering, College of Medicine and Health Sciences, Khalifa University of Science and Technology, Abu Dhabi, United Arab Emirates
| | - Vincent Chan
- Biomedical Engineering and Healthcare Engineering Innovation Center, Khalifa University, Abu Dhabi, United Arab Emirates
| | - Peter R. Corridon
- Biomedical Engineering and Healthcare Engineering Innovation Center, Khalifa University, Abu Dhabi, United Arab Emirates
- Department of Immunology and Physiology, College of Medicine and Health Sciences, Khalifa University of Science and Technology, Abu Dhabi, United Arab Emirates
- Center for Biotechnology, Khalifa University of Science and Technology, Abu Dhabi, United Arab Emirates
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Jumelle C, Hamri A, Egaud G, Mauclair C, Reynaud S, Dumas V, Pereira S, Garcin T, Gain P, Thuret G. Comparison of four methods of surface roughness assessment of corneal stromal bed after lamellar cutting. BIOMEDICAL OPTICS EXPRESS 2017; 8:4974-4986. [PMID: 29188095 PMCID: PMC5695945 DOI: 10.1364/boe.8.004974] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/20/2017] [Revised: 08/30/2017] [Accepted: 09/02/2017] [Indexed: 06/07/2023]
Abstract
Corneal lamellar cutting with a blade or femtosecond laser (FSL) is commonly used during refractive surgery and corneal grafts. Surface roughness of the cutting plane influences postoperative visual acuity but is difficult to assess reliably. For the first time, we compared chromatic confocal microscopy (CCM) with scanning electron microscopy, atomic force microscopy (AFM) and focus-variation microscopy (FVM) to characterize surfaces of variable roughness after FSL cutting. The small area allowed by AFM hinders conclusive roughness analysis, especially with irregular cuts. FVM does not always differentiate between smooth and rough surfaces. Finally, CCM allows analysis of large surfaces and differentiates between surface states.
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Affiliation(s)
- Clotilde Jumelle
- Corneal Graft Biology, Engineering and Imaging Laboratory, BiiGC, EA2521, Federative Institute of Research in Sciences and Health Engineering, Faculty of Medicine, Jean Monnet University, 10 rue de la Marandière, 42055 Saint-Etienne Cédex 02, France
| | - Alina Hamri
- GIE-Manutech-Ultrafast Surface Design, 20 rue Benoit Lauras, 42000 Saint-Etienne, France
| | - Gregory Egaud
- GIE-Manutech-Ultrafast Surface Design, 20 rue Benoit Lauras, 42000 Saint-Etienne, France
| | - Cyril Mauclair
- GIE-Manutech-Ultrafast Surface Design, 20 rue Benoit Lauras, 42000 Saint-Etienne, France
- Hubert Curien Laboratory, UMR-CNRS 5516, Jean Monnet University, 18 rue Benoit Lauras, 42000 Saint-Etienne, France
| | - Stephanie Reynaud
- Hubert Curien Laboratory, UMR-CNRS 5516, Jean Monnet University, 18 rue Benoit Lauras, 42000 Saint-Etienne, France
| | - Virginie Dumas
- Ecole Nationale d’Ingénieurs de Saint-Etienne (ENISE), Laboratoire de Tribologie et Dynamique des Systèmes, UMR 5513 CNRS, 58 rue Jean Parot, 42023 Saint-Etienne, France
| | - Sandrine Pereira
- Eye Bank, French Blood Center, 25 boulevard Pasteur, 42023 Saint-Etienne, France
| | - Thibaud Garcin
- Corneal Graft Biology, Engineering and Imaging Laboratory, BiiGC, EA2521, Federative Institute of Research in Sciences and Health Engineering, Faculty of Medicine, Jean Monnet University, 10 rue de la Marandière, 42055 Saint-Etienne Cédex 02, France
- Ophthalmology Department, University Hospital, avenue Albert Raimond, 42055 Saint-Etienne Cédex 02, France
| | - Philippe Gain
- Corneal Graft Biology, Engineering and Imaging Laboratory, BiiGC, EA2521, Federative Institute of Research in Sciences and Health Engineering, Faculty of Medicine, Jean Monnet University, 10 rue de la Marandière, 42055 Saint-Etienne Cédex 02, France
- Ophthalmology Department, University Hospital, avenue Albert Raimond, 42055 Saint-Etienne Cédex 02, France
| | - Gilles Thuret
- Corneal Graft Biology, Engineering and Imaging Laboratory, BiiGC, EA2521, Federative Institute of Research in Sciences and Health Engineering, Faculty of Medicine, Jean Monnet University, 10 rue de la Marandière, 42055 Saint-Etienne Cédex 02, France
- Ophthalmology Department, University Hospital, avenue Albert Raimond, 42055 Saint-Etienne Cédex 02, France
- Institut Universitaire de France, 1 rue Descartes, 75231 Paris, France
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Technical Feasibility of Isolated Bowman Layer Graft Preparation by Femtosecond Laser: A Pilot Study. Eur J Ophthalmol 2017; 27:675-677. [DOI: 10.5301/ejo.5000990] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 05/08/2017] [Indexed: 11/20/2022]
Abstract
Purpose To evaluate the technical feasibility of isolated Bowman layer (BL) graft preparation by femtosecond laser (FSL) and to compare the ultrastructural morphology to manually dissected grafts. Methods Five whole globes were placed in custom-made eye holders and debrided of epithelium. After programming a dissection depth of 20 μm, the FSL was docked into position and 5 isolated BL grafts were created. From 5 additional globes, corneoscleral buttons were procured, mounted in artificial anterior chambers, and stripped of BL via the previously described manual technique. Three specimens from both series were randomly selected and assigned to transmission electron microscopy for ultrastructural evaluation and thickness measurements. Results All dissections were uneventful and 10 total grafts were produced: 5 by FSL and 5 by manual dissection. Mean graft thickness was 37 (±8.6) μm (n = 3) for the FSL group and 11.7 (±1.6) μm (n = 3) for the manually dissected group. Transmission electron microscopy revealed a thick but relatively smooth posterior cut edge in the FSL group, versus a virtually isolated BL with irregular rests of dispersed stroma in the manually dissected group. Conclusions Femtosecond laser may have potential for harvesting intact BL and with a smooth posterior surface, but accompanied by variable amounts of anterior stroma owing to technical limitations.
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Mariacher S, Ebner M, Seuthe AM, Januschowski K, Ivanescu C, Opitz N, Szurman P, Boden KT. Femtosecond laser–assisted cataract surgery: First clinical results with special regard to central corneal thickness, endothelial cell count, and aqueous flare levels. J Cataract Refract Surg 2016; 42:1151-6. [DOI: 10.1016/j.jcrs.2016.06.024] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2016] [Revised: 05/01/2016] [Accepted: 06/15/2016] [Indexed: 11/30/2022]
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