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Català P, Vivensang F, van Beek D, Adriaens ME, Dickman MM, LaPointe VLS, Kutmon M. Elucidating the Corneal Endothelial Cell Proliferation Capacity through an Interspecies Transcriptome Comparison. Adv Biol (Weinh) 2023; 7:e2300065. [PMID: 37062753 DOI: 10.1002/adbi.202300065] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2023] [Revised: 03/20/2023] [Indexed: 04/18/2023]
Abstract
The regenerative capacity of corneal endothelial cells (CECs) differs between species; in bigger mammals, CECs are arrested in a non-proliferative state. Damage to these cells can compromise their function causing corneal opacity. Corneal transplantation is the current treatment for the recovery of clear eyesight, but the donor tissue demand is higher than the availability and there is a need to develop novel treatments. Interestingly, rabbit CECs retain a high proliferative profile and can repopulate the endothelium. There is a lack of fundamental knowledge to explain these differences. Gaining information on their transcriptomic variances could allow the identification of CEC proliferation drivers. In this study, human, sheep, and rabbit CECs are analyzed at the transcriptomic level. To understand the differences across each species, a pipeline for the analysis of pathways with different activities is generated. The results reveal that 52 pathways have different activity when comparing species with non-proliferative CECs (human and sheep) to species with proliferative CECs (rabbit). The results show that Notch and TGF-β pathways have increased activity in species with non-proliferative CECs, which might be associated with their low proliferation. Overall, this study illustrates transcriptomic pathway-level differences that can provide leads to develop novel therapies to regenerate the corneal endothelium.
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Affiliation(s)
- Pere Català
- Department of Cell Biology-Inspired Tissue Engineering, MERLN Institute for Technology-Inspired Regenerative Medicine, Maastricht, 6229ER, The Netherlands
- University Eye Clinic Maastricht, Maastricht University Medical Center+, Maastricht, 6229HX, The Netherlands
| | - Flora Vivensang
- Department of Cell Biology-Inspired Tissue Engineering, MERLN Institute for Technology-Inspired Regenerative Medicine, Maastricht, 6229ER, The Netherlands
| | - Daan van Beek
- Maastricht Centre for Systems Biology (MaCSBio), Maastricht University, Maastricht, 6229EN, The Netherlands
| | - Michiel E Adriaens
- Maastricht Centre for Systems Biology (MaCSBio), Maastricht University, Maastricht, 6229EN, The Netherlands
| | - Mor M Dickman
- Department of Cell Biology-Inspired Tissue Engineering, MERLN Institute for Technology-Inspired Regenerative Medicine, Maastricht, 6229ER, The Netherlands
- University Eye Clinic Maastricht, Maastricht University Medical Center+, Maastricht, 6229HX, The Netherlands
| | - Vanessa L S LaPointe
- Department of Cell Biology-Inspired Tissue Engineering, MERLN Institute for Technology-Inspired Regenerative Medicine, Maastricht, 6229ER, The Netherlands
| | - Martina Kutmon
- Maastricht Centre for Systems Biology (MaCSBio), Maastricht University, Maastricht, 6229EN, The Netherlands
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Wang F, Zhang W, Qiao Y, Shi D, Hu L, Cheng J, Wu J, Zhao L, Li D, Shi W, Xie L, Zhou Q. ECM-Like Adhesive Hydrogel for the Regeneration of Large Corneal Stromal Defects. Adv Healthc Mater 2023; 12:e2300192. [PMID: 37097884 DOI: 10.1002/adhm.202300192] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2023] [Revised: 04/09/2023] [Indexed: 04/26/2023]
Abstract
The repair of large-diameter corneal stroma defects is a major clinical problem. Although some studies have attempted to use hydrogels to repair corneal damage, most of these hydrogels can only be used for focal stromal defects that are ≤3.5 mm in diameter due to poor hydrogel adhesion. Here, a photocurable adhesive hydrogel that mimics the extracellular matrix (ECM) with regard to composition for repairing 6 mm-diameter corneal stromal defects in rabbits is investigated. This ECM-like adhesive can be rapidly cured after light exposure, with high light transmittance and good mechanical properties. More importantly, this hydrogel maintains the viability and adhesion of cornea-derived cells and promotes their migration in vitro in 2D and 3D culture environments. Proteomics analysis confirms that the hydrogel promotes cell proliferation and ECM synthesis. Furthermore, in rabbit corneal stromal defect repair experiments, it is proven by histological and proteomic analysis that this hydrogel can effectively promote corneal stroma repair, reduce scar formation, and increase corneal stromal-neural regeneration at the six months follow-up. This work demonstrates the great application of ECM-like adhesive hydrogels for the regeneration of large-diameter corneal defects.
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Affiliation(s)
- Fuyan Wang
- Eye Institute of Shandong First Medical University, Qingdao Eye Hospital of Shandong First Medical University, State Key Laboratory Cultivation Base, Shandong Provincial Key Laboratory of Ophthalmology, School of Ophthalmology, Shandong First Medical University, Qingdao, 266071, China
| | - Wei Zhang
- School of Medicine, Southeast University, Nanjing, 210009, China
| | - Yujie Qiao
- Eye Institute of Shandong First Medical University, Qingdao Eye Hospital of Shandong First Medical University, State Key Laboratory Cultivation Base, Shandong Provincial Key Laboratory of Ophthalmology, School of Ophthalmology, Shandong First Medical University, Qingdao, 266071, China
| | - Depeng Shi
- Eye Institute of Shandong First Medical University, Qingdao Eye Hospital of Shandong First Medical University, State Key Laboratory Cultivation Base, Shandong Provincial Key Laboratory of Ophthalmology, School of Ophthalmology, Shandong First Medical University, Qingdao, 266071, China
| | - Lizhi Hu
- School of Medicine, Southeast University, Nanjing, 210009, China
| | - Jun Cheng
- Eye Institute of Shandong First Medical University, Qingdao Eye Hospital of Shandong First Medical University, State Key Laboratory Cultivation Base, Shandong Provincial Key Laboratory of Ophthalmology, School of Ophthalmology, Shandong First Medical University, Qingdao, 266071, China
| | - Jingyi Wu
- Eye Institute of Shandong First Medical University, Qingdao Eye Hospital of Shandong First Medical University, State Key Laboratory Cultivation Base, Shandong Provincial Key Laboratory of Ophthalmology, School of Ophthalmology, Shandong First Medical University, Qingdao, 266071, China
| | - Long Zhao
- Eye Institute of Shandong First Medical University, Qingdao Eye Hospital of Shandong First Medical University, State Key Laboratory Cultivation Base, Shandong Provincial Key Laboratory of Ophthalmology, School of Ophthalmology, Shandong First Medical University, Qingdao, 266071, China
| | - Donfang Li
- Eye Institute of Shandong First Medical University, Qingdao Eye Hospital of Shandong First Medical University, State Key Laboratory Cultivation Base, Shandong Provincial Key Laboratory of Ophthalmology, School of Ophthalmology, Shandong First Medical University, Qingdao, 266071, China
| | - Weiyun Shi
- Eye Institute of Shandong First Medical University, Qingdao Eye Hospital of Shandong First Medical University, State Key Laboratory Cultivation Base, Shandong Provincial Key Laboratory of Ophthalmology, School of Ophthalmology, Shandong First Medical University, Qingdao, 266071, China
| | - Lixin Xie
- Eye Institute of Shandong First Medical University, Qingdao Eye Hospital of Shandong First Medical University, State Key Laboratory Cultivation Base, Shandong Provincial Key Laboratory of Ophthalmology, School of Ophthalmology, Shandong First Medical University, Qingdao, 266071, China
| | - Qingjun Zhou
- Eye Institute of Shandong First Medical University, Qingdao Eye Hospital of Shandong First Medical University, State Key Laboratory Cultivation Base, Shandong Provincial Key Laboratory of Ophthalmology, School of Ophthalmology, Shandong First Medical University, Qingdao, 266071, China
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3
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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] [What about the content of this article? (0)] [Affiliation(s)] [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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Bhujel B, Oh SH, Kim CM, Yoon YJ, Kim YJ, Chung HS, Ye EA, Lee H, Kim JY. Mesenchymal Stem Cells and Exosomes: A Novel Therapeutic Approach for Corneal Diseases. Int J Mol Sci 2023; 24:10917. [PMID: 37446091 DOI: 10.3390/ijms241310917] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2023] [Revised: 06/25/2023] [Accepted: 06/28/2023] [Indexed: 07/15/2023] Open
Abstract
The cornea, with its delicate structure, is vulnerable to damage from physical, chemical, and genetic factors. Corneal transplantation, including penetrating and lamellar keratoplasties, can restore the functions of the cornea in cases of severe damage. However, the process of corneal transplantation presents considerable obstacles, including a shortage of available donors, the risk of severe graft rejection, and potentially life-threatening complications. Over the past few decades, mesenchymal stem cell (MSC) therapy has become a novel alternative approach to corneal regeneration. Numerous studies have demonstrated the potential of MSCs to differentiate into different corneal cell types, such as keratocytes, epithelial cells, and endothelial cells. MSCs are considered a suitable candidate for corneal regeneration because of their promising therapeutic perspective and beneficial properties. MSCs compromise unique immunomodulation, anti-angiogenesis, and anti-inflammatory properties and secrete various growth factors, thus promoting corneal reconstruction. These effects in corneal engineering are mediated by MSCs differentiating into different lineages and paracrine action via exosomes. Early studies have proven the roles of MSC-derived exosomes in corneal regeneration by reducing inflammation, inhibiting neovascularization, and angiogenesis, and by promoting cell proliferation. This review highlights the contribution of MSCs and MSC-derived exosomes, their current usage status to overcome corneal disease, and their potential to restore different corneal layers as novel therapeutic agents. It also discusses feasible future possibilities, applications, challenges, and opportunities for future research in this field.
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Affiliation(s)
- Basanta Bhujel
- Department of Ophthalmology, University of Ulsan College of Medicine, Asan Medical Center, 88, Olympic-Ro, Songpa-Gu, Seoul 05505, Republic of Korea
| | - Se-Heon Oh
- Department of Ophthalmology, University of Ulsan College of Medicine, Asan Medical Center, 88, Olympic-Ro, Songpa-Gu, Seoul 05505, Republic of Korea
| | - Chang-Min Kim
- Department of Ophthalmology, University of Ulsan College of Medicine, Asan Medical Center, 88, Olympic-Ro, Songpa-Gu, Seoul 05505, Republic of Korea
| | - Ye-Ji Yoon
- Department of Ophthalmology, University of Ulsan College of Medicine, Asan Medical Center, 88, Olympic-Ro, Songpa-Gu, Seoul 05505, Republic of Korea
| | - Young-Jae Kim
- Department of Ophthalmology, University of Ulsan College of Medicine, Asan Medical Center, 88, Olympic-Ro, Songpa-Gu, Seoul 05505, Republic of Korea
| | - Ho-Seok Chung
- Department of Ophthalmology, University of Ulsan College of Medicine, Asan Medical Center, 88, Olympic-Ro, Songpa-Gu, Seoul 05505, Republic of Korea
| | - Eun-Ah Ye
- Department of Ophthalmology, University of Ulsan College of Medicine, Asan Medical Center, 88, Olympic-Ro, Songpa-Gu, Seoul 05505, Republic of Korea
| | - Hun Lee
- Department of Ophthalmology, University of Ulsan College of Medicine, Asan Medical Center, 88, Olympic-Ro, Songpa-Gu, Seoul 05505, Republic of Korea
| | - Jae-Yong Kim
- Department of Ophthalmology, University of Ulsan College of Medicine, Asan Medical Center, 88, Olympic-Ro, Songpa-Gu, Seoul 05505, Republic of Korea
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Xu Y, Liu J, Song W, Wang Q, Sun X, Zhao Q, Huang Y, Li H, Peng Y, Yuan J, Ji B, Ren L. Biomimetic Convex Implant for Corneal Regeneration Through 3D Printing. Adv Sci (Weinh) 2023; 10:e2205878. [PMID: 36775872 PMCID: PMC10104657 DOI: 10.1002/advs.202205878] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/10/2022] [Revised: 01/24/2023] [Indexed: 06/18/2023]
Abstract
Blindness caused by corneal damage affects millions of people worldwide, and this number continues to rise. However, rapid epithelization and a stable epithelium process are the two biggest challenges for traditional corneal materials. These processes are related to corneal curvature, which is an important factor in determination of the corneal healing process and epithelial behavior during corneal damage. In this study, smooth 3D-printed convex corneal implants based on gelatin methacrylate and collagen are generated. As epithelium distribution and adhesion vary in different regions of the natural cornea, this work separates the surfaces into four regions and studies how cells sense topological cues on curvature. It is found that rabbit corneal epithelial cells (RCECs) seeded on steeper slope gradient surfaces on convex structures result in more aligned cell organization and tighter cell-substrate adhesion, which can also be verified through finite element simulation and signaling pathway analysis. In vivo transplantation of convex implants result in a better fit with adjacent tissue and stronger cell adhesion than flat implants, thereby accelerating corneal epithelialization and promoting collagen fibers and neural regeneration within 180 days. Taken together, printed convex corneal implants that facilitate corneal regeneration may offer a translational strategy for the treatment of corneal damage.
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Affiliation(s)
- Yingni Xu
- School of Materials Science and EngineeringNational Engineering Research Center for Tissue Restoration and ReconstructionKey Laboratory of Biomedical Engineering of Guangdong ProvinceKey Laboratory of Biomedical Materials and Engineering of the Ministry of EducationInnovation Center for Tissue Restoration and ReconstructionSouth China University of TechnologyGuangzhou510006P. R. China
| | - Jia Liu
- School of Materials Science and EngineeringNational Engineering Research Center for Tissue Restoration and ReconstructionKey Laboratory of Biomedical Engineering of Guangdong ProvinceKey Laboratory of Biomedical Materials and Engineering of the Ministry of EducationInnovation Center for Tissue Restoration and ReconstructionSouth China University of TechnologyGuangzhou510006P. R. China
| | - Wenjing Song
- School of Materials Science and EngineeringNational Engineering Research Center for Tissue Restoration and ReconstructionKey Laboratory of Biomedical Engineering of Guangdong ProvinceKey Laboratory of Biomedical Materials and Engineering of the Ministry of EducationInnovation Center for Tissue Restoration and ReconstructionSouth China University of TechnologyGuangzhou510006P. R. China
| | - Qianchun Wang
- Wenzhou InstituteUniversity of Chinese Academy of SciencesWenzhou325001P. R. China
| | - Xiaomin Sun
- School of Materials Science and EngineeringNational Engineering Research Center for Tissue Restoration and ReconstructionKey Laboratory of Biomedical Engineering of Guangdong ProvinceKey Laboratory of Biomedical Materials and Engineering of the Ministry of EducationInnovation Center for Tissue Restoration and ReconstructionSouth China University of TechnologyGuangzhou510006P. R. China
| | - Qi Zhao
- School of Materials Science and EngineeringNational Engineering Research Center for Tissue Restoration and ReconstructionKey Laboratory of Biomedical Engineering of Guangdong ProvinceKey Laboratory of Biomedical Materials and Engineering of the Ministry of EducationInnovation Center for Tissue Restoration and ReconstructionSouth China University of TechnologyGuangzhou510006P. R. China
| | - Yongrui Huang
- School of Materials Science and EngineeringNational Engineering Research Center for Tissue Restoration and ReconstructionKey Laboratory of Biomedical Engineering of Guangdong ProvinceKey Laboratory of Biomedical Materials and Engineering of the Ministry of EducationInnovation Center for Tissue Restoration and ReconstructionSouth China University of TechnologyGuangzhou510006P. R. China
| | - Haochen Li
- School of Materials Science and EngineeringNational Engineering Research Center for Tissue Restoration and ReconstructionKey Laboratory of Biomedical Engineering of Guangdong ProvinceKey Laboratory of Biomedical Materials and Engineering of the Ministry of EducationInnovation Center for Tissue Restoration and ReconstructionSouth China University of TechnologyGuangzhou510006P. R. China
| | - Yuehai Peng
- National Engineering Research Center for Tissue Restoration and ReconstructionKey Laboratory of Biomedical Engineering of Guangdong ProvinceKey Laboratory of Biomedical Materials and Engineering of the Ministry of EducationInnovation Center for Tissue Restoration and ReconstructionSouth China University of TechnologyGuangzhou510006P. R. China
- Guangzhou Proud Seeing Biotechnology Co., LtdGuangzhou510320P. R. China
| | - Jin Yuan
- State Key Laboratory of OphthalmologyZhongshan Ophthalmic CenterSun Yat‐sen UniversityGuangzhou510623P. R. China
| | - Baohua Ji
- Institute of Biomechanics and Applications, Department of Engineering MechanicsZhejiang UniversityHangzhou310027P. R. China
| | - Li Ren
- School of Materials Science and EngineeringNational Engineering Research Center for Tissue Restoration and ReconstructionKey Laboratory of Biomedical Engineering of Guangdong ProvinceKey Laboratory of Biomedical Materials and Engineering of the Ministry of EducationInnovation Center for Tissue Restoration and ReconstructionSouth China University of TechnologyGuangzhou510006P. R. China
- Bioland LaboratoryGuangzhou Regenerative Medicine and Health Guangdong LaboratoryGuangzhou510005P. R. China
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Alio JL. Editorial: Regenerative surgery of the cornea. Front Med (Lausanne) 2022; 9:1099876. [PMID: 36643846 PMCID: PMC9832521 DOI: 10.3389/fmed.2022.1099876] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2022] [Accepted: 12/07/2022] [Indexed: 12/29/2022] Open
Affiliation(s)
- Jorge L. Alio
- Division of Ophthalmology, Faculty of Medicine, Miguel Hernández University, Elche, Spain,Department of Research and Development, Vissum Miranza Alicante, Alicante, Spain,*Correspondence: Jorge L. Alio ✉
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Tarsitano M, Cristiano MC, Fresta M, Paolino D, Rafaniello C. Alginate-Based Composites for Corneal Regeneration: The Optimization of a Biomaterial to Overcome Its Limits. Gels 2022; 8:431. [PMID: 35877516 DOI: 10.3390/gels8070431] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2022] [Revised: 07/04/2022] [Accepted: 07/08/2022] [Indexed: 12/27/2022] Open
Abstract
For many years, corneal transplantation has been the first-choice treatment for irreversible damage affecting the anterior part of the eye. However, the low number of cornea donors and cases of graft rejection highlighted the need to replace donor corneas with new biomaterials. Tissue engineering plays a fundamental role in achieving this goal through challenging research into a construct that must reflect all the properties of the cornea that are essential to ensure correct vision. In this review, the anatomy and physiology of the cornea are described to point out the main roles of the corneal layers to be compensated and all the requirements expected from the material to be manufactured. Then, a deep investigation of alginate as a suitable alternative to donor tissue was conducted. Thanks to its adaptability, transparency and low immunogenicity, alginate has emerged as a promising candidate for the realization of bioengineered materials for corneal regeneration. Chemical modifications and the blending of alginate with other functional compounds allow the control of its mechanical, degradation and cell-proliferation features, enabling it to go beyond its limits, improving its functionality in the field of corneal tissue engineering and regenerative medicine.
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Abstract
Over 6.2 million people worldwide suffer from moderate to severe vision loss due to corneal disease. While transplantation with allogenic donor tissue is sight-restoring for many patients with corneal blindness, this treatment modality is limited by long waiting lists and high rejection rates, particularly in patients with severe tissue damage and ocular surface pathologies. Hydrogel biomaterials represent a promising alternative to donor tissue for scalable, nonimmunogenic corneal reconstruction. However, implanted hydrogel materials require invasive surgeries and do not precisely conform to tissue defects, increasing the risk of patient discomfort, infection, and visual distortions. Moreover, most hydrogel crosslinking chemistries for the in situ formation of hydrogels exhibit off-target effects such as cross-reactivity with biological structures and/or result in extractable solutes that can have an impact on wound-healing and inflammation. To address the need for cytocompatible, minimally invasive, injectable tissue substitutes, host-guest interactions have emerged as an important crosslinking strategy. This review provides an overview of host-guest hydrogels as injectable therapeutics and highlights the potential application of host-guest interactions in the design of corneal stromal tissue substitutes.
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Affiliation(s)
- Amy C. Madl
- Department of Chemical Engineering, Stanford University, Stanford, CA 94305, USA;
| | - David Myung
- Department of Chemical Engineering, Stanford University, Stanford, CA 94305, USA;
- Byers Eye Institute, Stanford University School of Medicine, Palo Alto, CA 94303, USA
- VA Palo Alto Health Care System, Palo Alto, CA 94304, USA
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Chameettachal S, Puranik CJ, Veluthedathu MN, Chalil NB, John R, Pati F. Thickening of Ectatic Cornea through Regeneration Using Decellularized Corneal Matrix Injectable Hydrogel: A Strategic Advancement to Mitigate Corneal Ectasia. ACS Appl Bio Mater 2021; 4:7300-7313. [PMID: 35006959 DOI: 10.1021/acsabm.1c00821] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Ectatic corneal diseases are a group of eye disorders characterized by progressive thinning and outward bulging of the cornea, resulting in vision impairment. A few attempts have been made to use cornea-derived extracellular matrix hydrogels for corneal tissue engineering; however, no studies have investigated its application in corneal ectasia. In this study, we have first developed an animal surgical model that mimics a few specific phenotypes of ectatic cornea. Later, we investigated the potential of decellularized cornea matrix hydrogels (dCMH) from both human and bovine sources in increasing the thickness of the cornea in the developed surgical model. Our data advocate that surgical stromal depletion can be followed to establish ectatic models and can also provide information on the biocompatibility of materials, its integration with native stroma, degradation over time, and tissue remodeling. We observed that dCMH from both sources could integrate with ectatic thin corneal stroma and helps in regaining the thickness by regenerating a reasonably functional and transparent stroma; however, no significant difference was spotted between the dCMH made from human and bovine corneal tissue sources. Hence, this study is a promising step toward developing a non-invasive technique for the treatment of corneal ectasia by using dCMH.
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Affiliation(s)
- Shibu Chameettachal
- Department of Biomedical Engineering, Indian Institute of Technology Hyderabad, Kandi, Sangareddy Hyderabad, Telangana 502284, India
| | - Charuta J Puranik
- Oculus Regenerus Eye Care and Research Center, Nanalnagar, Hyderabad, Telangana 500008, India
| | - Mohamed Nijas Veluthedathu
- Department of Biomedical Engineering, Indian Institute of Technology Hyderabad, Kandi, Sangareddy Hyderabad, Telangana 502284, India
| | - Najathulla Bhagavathi Chalil
- Department of Materials Science and Metallurgical Engineering, Indian Institute of Technology Hyderabad, Kandi, Sangareddy , Hyderabad, Telangana 502284, India
| | - Renu John
- Department of Biomedical Engineering, Indian Institute of Technology Hyderabad, Kandi, Sangareddy Hyderabad, Telangana 502284, India
| | - Falguni Pati
- Department of Biomedical Engineering, Indian Institute of Technology Hyderabad, Kandi, Sangareddy Hyderabad, Telangana 502284, India
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Khorolskaya JI, Perepletchikova DA, Kachkin DV, Zhurenkov KE, Alexander-Sinkler EI, Ivanova JS, Mikhailova NA, Blinova MI. Derivation and Characterization of EGFP-Labeled Rabbit Limbal Mesenchymal Stem Cells and Their Potential for Research in Regenerative Ophthalmology. Biomedicines 2021; 9:1134. [PMID: 34572321 DOI: 10.3390/biomedicines9091134] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2021] [Revised: 08/24/2021] [Accepted: 08/28/2021] [Indexed: 12/13/2022] Open
Abstract
The development of cell-based approaches to the treatment of various cornea pathologies, including limbal stem cell deficiency (LSCD), is an area of current interest in regenerative biomedicine. In this context, the shortage of donor material is urgent, and limbal mesenchymal stem cells (L-MSCs) may become a promising cell source for the development of these novel approaches, being established mainly within the rabbit model. In this study, we obtained and characterized rabbit L-MSCs and modified them with lentiviral transduction to express the green fluorescent protein EGFP (L-MSCs-EGFP). L-MSCs and L-MSCs-EGFP express not only stem cell markers specific for mesenchymal stem cells but also ABCG2, ABCB5, ALDH3A1, PAX6, and p63a specific for limbal epithelial stem cells (LESCs), as well as various cytokeratins (3/12, 15, 19). L-MSCs-EGFP have been proven to differentiate into adipogenic, osteogenic, and chondrogenic directions, as well as to transdifferentiate into epithelial cells. The possibility of using L-MSCs-EGFP to study the biocompatibility of various scaffolds developed to treat corneal pathologies was demonstrated. L-MSCs-EGFP may become a useful tool for studying regenerative processes occurring during the treatment of various corneal pathologies, including LSCD, with the use of cell-based technologies.
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Liu C. Application of marine collagen for stem-cell-based therapy and tissue regeneration (Review). Med Int (Lond) 2021; 1:6. [PMID: 36698868 PMCID: PMC9855277 DOI: 10.3892/mi.2021.5] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 04/22/2021] [Accepted: 06/22/2021] [Indexed: 01/28/2023]
Abstract
Tissue engineering and regenerative medicine is becoming an important component in modern biological scientific research. Tissue engineering, a branch of regenerative medicine, is a field that is actively developing to meet the challenges presented in biomedical applications. This particularly applies to the research area of stem cells and biomaterials, due to both being pivotal determinants for the successful restoration or regeneration of damaged tissues and organs. Recently, the development of innovative marine collagen-based biomaterials has attracted attention due to the reported environmentally friendly properties, the lack of zoonotic disease transmission, biocompatibility, bioactivity, the lack of ethics-related concerns and cost-effectiveness for manufacturing. The present review aimed to summarize the potential application and function of marine collagen in stem cell research in a medical and clinical setting. In addition, the present review cited recent studies regarding the latest research advances into using marine collagen for cartilage, bone, periodontal and corneal regeneration. It also characterized the distinct advantages of using marine collagen for stem cell-based tissue repair and regeneration. In addition, the present review comprehensively discussed the most up to date information on stem cell biology, particularly the possibility of treating stem cells with marine collagen to maximize their multi-directional differentiation capability, which highlights the potential use of marine collagen in regenerative medicine. Furthermore, recent research progress on the potential immunomodulatory capacity of mesenchymal stem cells following treatment with marine collagen to improve the understanding of cell-matrix interactions was investigated. Finally, perspectives on the possible future research directions for the application of marine collagen in the area of regenerative medicine are provided.
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Affiliation(s)
- Chao Liu
- Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai 200011, P.R. China
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Singh A, Sangwan VS. Mini-Review: Regenerating the Corneal Epithelium With Simple Limbal Epithelial Transplantation. Front Med (Lausanne) 2021; 8:673330. [PMID: 34124103 PMCID: PMC8195332 DOI: 10.3389/fmed.2021.673330] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2021] [Accepted: 05/03/2021] [Indexed: 11/13/2022] Open
Abstract
Simple limbal epithelial transplantation (SLET) is an ingenious, low cost and effective technique of limbal stem cell transplantation (LSCT) that is increasingly being undertaken in practice across the world. Since it was first described a decade ago, the technique has been performed in a variety of cases of limbal stem cell deficiency (LSCD) and has underwent several innovative modifications. Published literature on SLET has progressively increased over time and successful outcomes in various clinical scenarios have been reported. This concise review attempts to present a crisp account of SLET covering the indications and contraindications of performing the procedure; detailed account of pre-operative work up and preparation; surgical technique and its modifications; post-operative course, care and possible complications as well as published outcomes of surgery from across the world. Comparative analysis of various techniques of LSCT have been discussed and common concerns of surgeons practising or those who are planning to start practising SLET have been addressed. The authors hope that the pragmatic insights and pearls given at the end of the review will aid the surgeons in performing this technique to provide maximum benefit to patients suffering from the potentially blinding condition of LSCD.
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Affiliation(s)
- Aastha Singh
- Department of Cornea, Anterior Segment and Uveitis, Dr. Shroff's Charity Eye Hospital, New Delhi, India
| | - Virender S Sangwan
- Department of Cornea, Anterior Segment and Uveitis, Dr. Shroff's Charity Eye Hospital, New Delhi, India
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13
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Erkoc-Biradli FZ, Ozgun A, Öztürk-Öncel MÖ, Marcali M, Elbuken C, Bulut O, Rasier R, Garipcan B. Bioinspired hydrogel surfaces to augment corneal endothelial cell monolayer formation. J Tissue Eng Regen Med 2021; 15:244-255. [PMID: 33448665 DOI: 10.1002/term.3173] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2020] [Revised: 12/08/2020] [Accepted: 12/26/2020] [Indexed: 11/06/2022]
Abstract
Corneal endothelial cells (CECs) have limited proliferation ability leading to corneal endothelium (CE) dysfunction and eventually vision loss when cell number decreases below a critical level. Although transplantation is the main treatment method, donor shortage problem is a major bottleneck. The transplantation of in vitro developed endothelial cells with desirable density is a promising idea. Designing cell substrates that mimic the native CE microenvironment is a substantial step to achieve this goal. In the presented study, we prepared polyacrylamide (PA) cell substrates that have a microfabricated topography inspired by the dimensions of CECs. Hydrogel surfaces were prepared via two different designs with small and large patterns. Small patterned hydrogels have physiologically relevant hexagon densities (∼2000 hexagons/mm2 ), whereas large patterned hydrogels have sparsely populated hexagons (∼400 hexagons/mm2 ). These substrates have similar elastic modulus of native Descemet's membrane (DM; ∼50 kPa) and were modified with Collagen IV (Col IV) to have biochemical content similar to native DM. The behavior of bovine corneal endothelial cells on these substrates was investigated and results show that cell proliferation on small patterned substrates was significantly (p = 0.0004) higher than the large patterned substrates. Small patterned substrates enabled a more densely populated cell monolayer compared to other groups (p = 0.001 vs. flat and p < 0.0001 vs. large patterned substrates). These results suggest that generating bioinspired surface topographies augments the formation of CE monolayers with the desired cell density, addressing the in vitro development of CE layers.
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Affiliation(s)
- Fatma Zehra Erkoc-Biradli
- (Bio)3 Research laboratory, Institute of Biomedical Engineering, Bogazici University, Istanbul, Turkey
| | - Alp Ozgun
- (Bio)3 Research laboratory, Institute of Biomedical Engineering, Bogazici University, Istanbul, Turkey
| | | | - Merve Marcali
- Institute of Materials Science and Nanotechnology, National Nanotechnology Research Center (UNAM), Bilkent University, Ankara, Turkey
| | - Caglar Elbuken
- Institute of Materials Science and Nanotechnology, National Nanotechnology Research Center (UNAM), Bilkent University, Ankara, Turkey.,Faculty of Biochemistry and Molecular Medicine, Faculty of Medicine, University of Oulu, Oulu, Finland
| | - Osman Bulut
- Faculty of Civil Engineering, Istanbul Technical University, Istanbul, Turkey
| | - Rıfat Rasier
- Department of Ophthalmology, Demiroglu Bilim University, Istanbul, Turkey
| | - Bora Garipcan
- (Bio)3 Research laboratory, Institute of Biomedical Engineering, Bogazici University, Istanbul, Turkey
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14
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Nosrati H, Abpeikar Z, Mahmoudian ZG, Zafari M, Majidi J, Alizadeh A, Moradi L, Asadpour S. Corneal epithelium tissue engineering: recent advances in regeneration and replacement of corneal surface. Regen Med 2020; 15:2029-2044. [PMID: 33169642 DOI: 10.2217/rme-2019-0055] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
Currently, many corneal diseases are treated by corneal transplantation, artificial corneal implantation or, in severe cases, keratoprosthesis. Owing to the shortage of cornea donors and the risks involved with artificial corneal implants, such as infection transmission, researchers continually seek new approaches for corneal regeneration. Corneal tissue engineering is a promising approach that has attracted much attention from researchers and is focused on regenerative strategies using various biomaterials in combination with different cell types. These constructs should have the ability to mimic the native tissue microenvironment and present suitable optical, mechanical and biological properties. In this article, we review studies that have focused on the current clinical techniques for corneal replacement. We also describe tissue-engineering and cell-based approaches for corneal regeneration.
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Affiliation(s)
- Hamed Nosrati
- Department of Tissue Engineering & Applied Cell Sciences, School of Advanced Technologies, Shahrekord University of Medical Sciences, Shahrekord, Iran
| | - Zahra Abpeikar
- Department of Tissue Engineering & Applied Cell Sciences, School of Advanced Technologies, Shahrekord University of Medical Sciences, Shahrekord, Iran
| | - Zahra Gholami Mahmoudian
- Department of Anatomical Sciences, Medical School, Kermanshah University of Medical Sciences, Kermanshah, Iran
| | - Mahdi Zafari
- Department of Bacteriology, Pasteur Institute of Iran, Tehran, Iran
| | - Jafar Majidi
- Cellular & Molecular Research Center, Basic Health Science Institute, Shahrekord University of Medical Sciences, Shahrekord, Iran
| | - Akram Alizadeh
- Department of Tissue Engineering & Applied Cell Sciences, Faculty of Medicine, Semnan University of Medical Sciences, Semnan, Iran
| | - Lida Moradi
- The Ronald O Perelman Department of Dermatology, New York University, School of Medicine, New York, NY 10016, USA.,Department of Cell Biology, New York University, School of Medicine, New York, NY, 10016 USA
| | - Shiva Asadpour
- Department of Tissue Engineering & Applied Cell Sciences, School of Advanced Technologies, Shahrekord University of Medical Sciences, Shahrekord, Iran.,Cellular & Molecular Research Center, Basic Health Science Institute, Shahrekord University of Medical Sciences, Shahrekord, Iran
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15
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Zhang W, Chen J, Qu M, Backman LJ, Zhang A, Liu H, Zhang X, Zhou Q, Danielson P. Sustained Release of TPCA-1 from Silk Fibroin Hydrogels Preserves Keratocyte Phenotype and Promotes Corneal Regeneration by Inhibiting Interleukin-1β Signaling. Adv Healthc Mater 2020; 9:e2000591. [PMID: 32743953 DOI: 10.1002/adhm.202000591] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2020] [Revised: 07/09/2020] [Indexed: 12/14/2022]
Abstract
Corneal injury due to ocular trauma or infection is one of the most challenging vision impairing pathologies that exists. Many studies focus on the pro-inflammatory and pro-angiogenic effects of interleukin-1β (IL-1β) on corneal wound healing. However, the effect of IL-1β on keratocyte phenotype and corneal repair, as well as the underlying mechanisms, is not clear. This study reports, for the first time, that IL-1β induces phenotype changes of keratocytes in vitro, by significantly down-regulating the gene and protein expression levels of keratocyte markers (Keratocan, Lumican, Aldh3a1 and CD34). Furthermore, it is found that the NF-κB pathway is involved in the IL-1β-induced changes of keratocyte phenotype, and that the selective IKKβ inhibitor TPCA-1, which inhibits NF-κB, can preserve keratocyte phenotype under IL-1β simulated pathological conditions in vitro. By using a murine model of corneal injury, it is shown that sustained release of TPCA-1 from degradable silk fibroin hydrogels accelerates corneal wound healing, improves corneal transparency, enhances the expression of keratocyte markers, and supports the regeneration of well-organized epithelium and stroma. These findings provide insights not only into the pathophysiological mechanisms of corneal wound healing, but also into the potential development of new treatments for patients with corneal injuries.
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Affiliation(s)
- Wei Zhang
- School of Medicine Southeast University Nanjing 210009 China
- Department of Integrative Medical Biology, Anatomy Umeå University Umeå SE‐901 87 Sweden
- Jiangsu Key Laboratory for Biomaterials and Devices Southeast University Nanjing 210096 China
| | - Jialin Chen
- School of Medicine Southeast University Nanjing 210009 China
- Department of Integrative Medical Biology, Anatomy Umeå University Umeå SE‐901 87 Sweden
- Jiangsu Key Laboratory for Biomaterials and Devices Southeast University Nanjing 210096 China
| | - Mingli Qu
- State Key Laboratory Cultivation Base Shandong Provincial Key Laboratory of Ophthalmology, Shandong Eye Institute Shandong First Medical University & Shandong Academy of Medical Sciences Qingdao 266071 China
| | - Ludvig J. Backman
- Department of Integrative Medical Biology, Anatomy Umeå University Umeå SE‐901 87 Sweden
| | - Aini Zhang
- School of Medicine Southeast University Nanjing 210009 China
| | - Haoyang Liu
- School of Medicine Southeast University Nanjing 210009 China
| | - Xiaoping Zhang
- Ophthalmology Department the Affiliated Hospital of Qingdao University Qingdao 266003 China
| | - Qingjun Zhou
- State Key Laboratory Cultivation Base Shandong Provincial Key Laboratory of Ophthalmology, Shandong Eye Institute Shandong First Medical University & Shandong Academy of Medical Sciences Qingdao 266071 China
| | - Patrik Danielson
- Department of Integrative Medical Biology, Anatomy Umeå University Umeå SE‐901 87 Sweden
- Department of Clinical Sciences, Ophthalmology Umeå University Umeå SE‐901 87 Sweden
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Tomasello L, Coppola A, Pitrone M, Failla V, Cillino S, Pizzolanti G, Giordano C. PFN1 and integrin-β1/mTOR axis involvement in cornea differentiation of fibroblast limbal stem cells. J Cell Mol Med 2019; 23:7210-7221. [PMID: 31513338 PMCID: PMC6815913 DOI: 10.1111/jcmm.14438] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2019] [Revised: 04/26/2019] [Accepted: 05/15/2019] [Indexed: 12/14/2022] Open
Abstract
Ex vivo limbal stem cell transplantation is the main therapeutic approach to address a complete and functional re-epithelialization in corneal blindness, the second most common eye disorder. Although important key points were defined, the molecular mechanisms involved in the epithelial phenotype determination are unclear. Our previous studies have demonstrated the pluripotency and immune-modulatory of fibroblast limbal stem cells (f-LSCs), isolated from the corneal limbus. We defined a proteomic profile especially enriched in wound healing and cytoskeleton-remodelling proteins, including Profilin-1 (PFN1). In this study we postulate that pfn-1 knock down promotes epithelial lineage by inhibiting the integrin-β1(CD29)/mTOR pathway and subsequent NANOG down-expression. We showed that it is possible modulate pfn1 expression levels by treating f-LSCs with Resveratrol (RSV), a natural compound: pfn1 decline is accompanied with up-regulation of the specific differentiation epithelial genes pax6 (paired-box 6), sox17 (sex determining region Y-box 17) and ΔNp63-α (p63 splice variant), consistent with drop-down of the principle stem gene levels. These results contribute to understand the molecular biology of corneal epithelium development and suggest that pfn1 is a potential molecular target for the treatment of corneal blindness based on epithelial cell dysfunction.
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Affiliation(s)
- Laura Tomasello
- Laboratory of Regenerative Medicine "Aldo Galluzzo", Section of Endocrinology, Diabetology and Metabolism, Department of Promozione della Salute, Materno-Infantile, di Medicina Interna e Specialistica di Eccellenza "G. D'Alessandro" (ProMISE), University of Palermo, Palermo, Italy
| | - Antonina Coppola
- Laboratory of Regenerative Medicine "Aldo Galluzzo", Section of Endocrinology, Diabetology and Metabolism, Department of Promozione della Salute, Materno-Infantile, di Medicina Interna e Specialistica di Eccellenza "G. D'Alessandro" (ProMISE), University of Palermo, Palermo, Italy
| | - Maria Pitrone
- Laboratory of Regenerative Medicine "Aldo Galluzzo", Section of Endocrinology, Diabetology and Metabolism, Department of Promozione della Salute, Materno-Infantile, di Medicina Interna e Specialistica di Eccellenza "G. D'Alessandro" (ProMISE), University of Palermo, Palermo, Italy
| | - Valentina Failla
- Department of Ophthalmology, University of Palermo, Palermo, Italy
| | | | - Giuseppe Pizzolanti
- Laboratory of Regenerative Medicine "Aldo Galluzzo", Section of Endocrinology, Diabetology and Metabolism, Department of Promozione della Salute, Materno-Infantile, di Medicina Interna e Specialistica di Eccellenza "G. D'Alessandro" (ProMISE), University of Palermo, Palermo, Italy
| | - Carla Giordano
- Laboratory of Regenerative Medicine "Aldo Galluzzo", Section of Endocrinology, Diabetology and Metabolism, Department of Promozione della Salute, Materno-Infantile, di Medicina Interna e Specialistica di Eccellenza "G. D'Alessandro" (ProMISE), University of Palermo, Palermo, Italy
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Mansoor H, Ong HS, Riau AK, Stanzel TP, Mehta JS, Yam GH. Current Trends and Future Perspective of Mesenchymal Stem Cells and Exosomes in Corneal Diseases. Int J Mol Sci. 2019;20. [PMID: 31212734 PMCID: PMC6627168 DOI: 10.3390/ijms20122853] [Citation(s) in RCA: 61] [Impact Index Per Article: 12.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2019] [Revised: 06/01/2019] [Accepted: 06/10/2019] [Indexed: 02/07/2023] Open
Abstract
The corneal functions (transparency, refractivity and mechanical strength) deteriorate in many corneal diseases but can be restored after corneal transplantation (penetrating and lamellar keratoplasties). However, the global shortage of transplantable donor corneas remains significant and patients are subject to life-long risk of immune response and graft rejection. Various studies have shown the differentiation of multipotent mesenchymal stem cells (MSCs) into various corneal cell types. With the unique properties of immunomodulation, anti-angiogenesis and anti-inflammation, they offer the advantages in corneal reconstruction. These effects are widely mediated by MSC differentiation and paracrine signaling via exosomes. Besides the cell-free nature of exosomes in circumventing the problems of cell-fate control and tumorigenesis, the vesicle content can be genetically modified for optimal therapeutic affinity. The pharmacology and toxicology, xeno-free processing with sustained delivery, scale-up production in compliant to Good Manufacturing Practice regulations, and cost-effectiveness are the current foci of research. Routes of administration via injection, topical and/or engineered bioscaffolds are also explored for its applicability in treating corneal diseases.
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Abstract
Disease affecting the cornea is a common cause of blindness worldwide. To date, the amniotic membrane (AM) is the most widely used clinical method for cornea regeneration. However, donor-dependent differences in the AM may result in variable clinical outcomes. To overcome this issue, biomaterials are currently under investigation for corneal regeneration in vitro and in vivo. In this article, we highlight the recent advances in hydrogels, bioengineered prosthetic devices, contact lenses, and drug delivery systems for corneal regeneration. In clinical studies, the therapeutic effects of biomaterials, including fibrin and collagen-based hydrogels and silicone contact lenses, have been demonstrated in damaged cornea. The combination of cells and biomaterials may provide potential treatment in corneal wound healing in the future.
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Affiliation(s)
- I-Lun Tsai
- Department of Ophthalmology, Taipei City Hospital, Taipei, Taiwan, ROC
| | - Chih-Chien Hsu
- Institute of Clinical Medicine, National Yang-Ming University, Taipei, Taiwan, ROC; Department of Ophthalmology, Taipei Veterans General Hospital, Taipei, Taiwan, ROC
| | - Kuo-Hsuan Hung
- Institute of Clinical Medicine, National Yang-Ming University, Taipei, Taiwan, ROC; Division of Ophthalmology, National Yang-Ming University Hospital, I-Lan, Taiwan, ROC
| | - Chi-Wen Chang
- School of Nursing, College of Medicine, Chang-Gung University, Taoyuan, Taiwan, ROC
| | - Yung-Hsin Cheng
- Department of Education and Research, Taipei City Hospital, Taipei, Taiwan, ROC; Institute of Pharmacology, National Yang-Ming University School of Medicine, Taipei, Taiwan, ROC.
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19
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Ljunggren MK, Elizondo RA, Edin E, Olsen D, Merrett K, Lee CJ, Salerud G, Polarek J, Fagerholm P, Griffith M. Effect of Surgical Technique on Corneal Implant Performance. Transl Vis Sci Technol 2014; 3:6. [PMID: 24749003 DOI: 10.1167/tvst.3.2.6] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2013] [Accepted: 02/14/2014] [Indexed: 02/04/2023] Open
Abstract
PURPOSE Our aim was to determine the effect of a surgical technique on biomaterial implant performance, specifically graft retention. METHODS Twelve mini pigs were implanted with cell-free, 1-ethyl-3-(3-dimethyl aminopropyl) carbodiimide (EDC)/N-hydroxysuccinimide (NHS) cross-linked recombinant human collagen type III (RHCIII) hydrogels as substitutes for donor corneal allografts using overlying sutures with or without human amniotic membrane (HAM) versus interrupted sutures with HAM. The effects of the retention method were compared as well as the effects of collagen concentration (13.7% to 15% RHCIII). RESULTS All implanted corneas showed initial haze that cleared with time, resulting in corneas with optical clarity matching those of untreated controls. Biochemical analysis showed that by 12 months post operation, the initial RHCIII implants had been completely remodeled, as type I collagen, was the major collagenous protein detected, whereas no RHCIII could be detected. Histological analysis showed all implanted corneas exhibited regeneration of epithelial and stromal layers as well as nerves, along with touch sensitivity and tear production. Most neovascularization was seen in corneas stabilized by interrupted sutures. CONCLUSIONS This showed that the surgical technique used does have a significant effect on the overall performance of corneal implants, overlying sutures caused less vascularization than interrupted sutures. TRANSLATIONAL RELEVANCE Understanding the significance of the suturing technique can aid the selection of the most appropriate procedure when implanting artificial corneal substitutes. The same degree of regeneration, despite a higher collagen content indicates that future material development can progress toward stronger, more resistant implants.
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Affiliation(s)
- Monika Kozak Ljunggren
- Integrative Regenerative Medicine Centre and Department of Clinical and Experimental Medicine, Linköping University, Linköping, Sweden
| | - Rodolfo A Elizondo
- Integrative Regenerative Medicine Centre and Department of Clinical and Experimental Medicine, Linköping University, Linköping, Sweden
| | - Elle Edin
- Integrative Regenerative Medicine Centre and Department of Clinical and Experimental Medicine, Linköping University, Linköping, Sweden
| | - David Olsen
- FibroGen Incorporated, San Francisco, CA, USA
| | - Kimberley Merrett
- Integrative Regenerative Medicine Centre and Department of Clinical and Experimental Medicine, Linköping University, Linköping, Sweden ; Ottawa Hospital Research Institute-Vision Programme, Ottawa, Ontario, Canada
| | - Chyan-Jang Lee
- Integrative Regenerative Medicine Centre and Department of Clinical and Experimental Medicine, Linköping University, Linköping, Sweden ; Ottawa Hospital Research Institute-Vision Programme, Ottawa, Ontario, Canada
| | - Göran Salerud
- Integrative Regenerative Medicine Centre and Department of Biomedical Engineering, Linköping University, Linköping, Sweden
| | | | - Per Fagerholm
- Integrative Regenerative Medicine Centre and Department of Clinical and Experimental Medicine, Linköping University, Linköping, Sweden
| | - May Griffith
- Integrative Regenerative Medicine Centre and Department of Clinical and Experimental Medicine, Linköping University, Linköping, Sweden ; Ottawa Hospital Research Institute-Vision Programme, Ottawa, Ontario, Canada
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Nakajima R, Takeda S. Fabrication of corneal epithelial cell sheets maintaining colony-forming cells without feeder cells by oxygen-controlled method. Exp Eye Res 2014; 118:53-60. [PMID: 24184720 DOI: 10.1016/j.exer.2013.10.019] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2013] [Revised: 09/11/2013] [Accepted: 10/19/2013] [Indexed: 01/28/2023]
Abstract
The use of murine 3T3 feeder cells needs to be avoided when fabricating corneal epithelial cell sheets for use in treating ocular surface diseases. However, the expression level of the epithelial stem/progenitor cell marker, p63, is down-regulated in feeder-free culture systems. In this study, in order to fabricate corneal epithelial cell sheets that maintain colony-forming cells without using any feeder cells, we investigated the use of an oxygen-controlled method that was developed previously to fabricate cell sheets efficiently. Rabbit limbal epithelial cells were cultured under hypoxia (1-10% O2) and under normoxia during stratification after reaching confluence. Multilayered corneal epithelial cell sheets were fabricated using an oxygen-controlled method, and immunofluorescence analysis showed that cytokeratin 3 and p63 was expressed in appropriate localization in the cell sheets. The colony-forming efficiency of the cell sheets fabricated by the oxygen-controlled method without feeder cells was significantly higher than that of cell sheets fabricated under 20% O2 without feeder cells. These results indicate that the oxygen-controlled method has the potential to achieve a feeder-free culture system for fabricating corneal epithelial cell sheets for corneal regeneration.
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