1
|
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. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 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] [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.
Collapse
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
| |
Collapse
|
2
|
McTiernan CD, Simpson FC, Haagdorens M, Samarawickrama C, Hunter D, Buznyk O, Fagerholm P, Ljunggren MK, Lewis P, Pintelon I, Olsen D, Edin E, Groleau M, Allan BD, Griffith M. LiQD Cornea: Pro-regeneration collagen mimetics as patches and alternatives to corneal transplantation. SCIENCE ADVANCES 2020; 6:6/25/eaba2187. [PMID: 32917640 PMCID: PMC7299624 DOI: 10.1126/sciadv.aba2187] [Citation(s) in RCA: 58] [Impact Index Per Article: 14.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/14/2019] [Accepted: 05/08/2020] [Indexed: 05/13/2023]
Abstract
Transplantation with donor corneas is the mainstay for treating corneal blindness, but a severe worldwide shortage necessitates the development of other treatment options. Corneal perforation from infection or inflammation is sealed with cyanoacrylate glue. However, the resulting cytotoxicity requires transplantation. LiQD Cornea is an alternative to conventional corneal transplantation and sealants. It is a cell-free, liquid hydrogel matrix for corneal regeneration, comprising short collagen-like peptides conjugated with polyethylene glycol and mixed with fibrinogen to promote adhesion within tissue defects. Gelation occurs spontaneously at body temperature within 5 min. Light exposure is not required-particularly advantageous because patients with corneal inflammation are typically photophobic. The self-assembling, fully defined, synthetic collagen analog is much less costly than human recombinant collagen and reduces the risk of immune rejection associated with xenogeneic materials. In situ gelation potentially allows for clinical application in outpatient clinics instead of operating theaters, maximizing practicality, and minimizing health care costs.
Collapse
Affiliation(s)
- Christopher D McTiernan
- Centre de Recherche Hôpital Maisonneuve-Rosemont, Montréal, QC, Canada
- Department of Ophthalmology and Institute of Biomedical Engineering, Université de Montréal, Montréal, QC, Canada
- Division of Cardiac Surgery, University of Ottawa Heart Institute, Ottawa, ON, Canada
| | - Fiona C Simpson
- Centre de Recherche Hôpital Maisonneuve-Rosemont, Montréal, QC, Canada
- Department of Ophthalmology and Institute of Biomedical Engineering, Université de Montréal, Montréal, QC, Canada
| | - Michel Haagdorens
- Department of Ophthalmology, Visual Optics and Visual Rehabilitation, University of Antwerp, Antwerp, Belgium
| | - Chameen Samarawickrama
- Centre for Vision Research, The Westmead Institute for Medical Research, and Faculty of Medicine and Health, University of Sydney, Sydney, Australia
- Institute for Clinical and Experimental Medicine, Linköping University, Linköping, Sweden
| | - Damien Hunter
- Centre for Vision Research, The Westmead Institute for Medical Research, and Faculty of Medicine and Health, University of Sydney, Sydney, Australia
| | - Oleksiy Buznyk
- Institute for Clinical and Experimental Medicine, Linköping University, Linköping, Sweden
| | - Per Fagerholm
- Institute for Clinical and Experimental Medicine, Linköping University, Linköping, Sweden
| | - Monika K Ljunggren
- Institute for Clinical and Experimental Medicine, Linköping University, Linköping, Sweden
| | - Philip Lewis
- School of Optometry and Vision Sciences, Cardiff University, Cardiff, UK
| | - Isabel Pintelon
- Laboratory of Cell Biology and Histology, University of Antwerp, Antwerp, Belgium
| | | | - Elle Edin
- Centre de Recherche Hôpital Maisonneuve-Rosemont, Montréal, QC, Canada
- Department of Ophthalmology and Institute of Biomedical Engineering, Université de Montréal, Montréal, QC, Canada
| | - Marc Groleau
- Centre de Recherche Hôpital Maisonneuve-Rosemont, Montréal, QC, Canada
| | - Bruce D Allan
- NIHR Biomedical Research Centre at Moorfields Eye Hospital NHS Foundation Trust and UCL Institute of Ophthalmology, London, UK.
| | - May Griffith
- Centre de Recherche Hôpital Maisonneuve-Rosemont, Montréal, QC, Canada.
- Department of Ophthalmology and Institute of Biomedical Engineering, Université de Montréal, Montréal, QC, Canada
| |
Collapse
|
3
|
Wang Y, Ma J, Jiang X, Liu Z, Yang J, Li X. Development of Transparent Acellular Dermal Matrix as Tissue-Engineered Stroma Substitute for Central Lamellar Keratoplasty. Invest Ophthalmol Vis Sci 2020; 61:5. [PMID: 31999820 PMCID: PMC7205104 DOI: 10.1167/iovs.61.1.5] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
Purpose To improve the transparency of the acellular dermal matrix (ADM) and investigate the optical, mechanical and histologic properties and biocompatibility of transparent ADM (TADM) in lamellar keratoplasty. Methods A stepwise sectioning strategy was applied to determine the transparency distribution of the ADM, and TADM was fabricated accordingly. Transmittance measurements, uniaxial tension testing, and histologic staining were applied to detect its properties. Lamellar keratoplasty was performed in rabbits with TADM, and postoperative evaluations were conducted including the transmittance of the transplant area and histologic staining. Results The transmittance of the ADM increased with increasing depth, and TADM was isolated mechanically at the deepest level. There was a significant improvement in the transmittance of the TADM compared with the ADM, and no significant difference in transmittance between dehydrated TADM and cornea was observed. The elastic modulus of TADM was significantly stronger than that of normal cornea (P = 0.004). TADM consisted of dense collagen fibrils, mainly collagen type I, and the collagen fibril diameter and interfibrillar spacing were determined to be larger than corneal stroma. After lamellar keratoplasty in rabbits, the TADM was well integrated with the host cornea, and transparent cornea without neovascularization was observed at 6 months. Re-epithelization was completed at 1 month, and keratocyte repopulation and collagen remodeling were observed in the graft 3 and 6 months after surgery. Conclusions This study presents the transparency distribution of the ADM and a method for obtaining TADM, which demonstrates ideal transparency, strong mechanical properties, and satisfactory biocompatibility when applied in lamellar keratoplasty.
Collapse
|
4
|
Lei X, Jia YG, Song W, Qi D, Jin J, Liu J, Ren L. Mechanical and Optical Properties of Reinforced Collagen Membranes for Corneal Regeneration through Polyrotaxane Cross-Linking. ACS APPLIED BIO MATERIALS 2019; 2:3861-3869. [DOI: 10.1021/acsabm.9b00464] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Xiaoyue Lei
- School of Materials Science and Engineering, South China University of Technology, Guangzhou 510006, P. R. China
- National Engineering Research Center for Tissue Restoration and Reconstruction, Guangzhou 510006, P. R. China
- Key Laboratory of Biomedical Engineering of Guangdong Province, South China University of Technology, Guangzhou 510006, P. R. China
- Key Laboratory of Biomedical Materials and Engineering of the Ministry of Education, South China University of Technology, Guangzhou 510006, P. R. China
- Innovation Center for Tissue Restoration and Reconstruction, South China University of Technology, Guangzhou 510006, P. R. China
| | - Yong-Guang Jia
- School of Materials Science and Engineering, South China University of Technology, Guangzhou 510006, P. R. China
- National Engineering Research Center for Tissue Restoration and Reconstruction, Guangzhou 510006, P. R. China
- Key Laboratory of Biomedical Engineering of Guangdong Province, South China University of Technology, Guangzhou 510006, P. R. China
- Key Laboratory of Biomedical Materials and Engineering of the Ministry of Education, South China University of Technology, Guangzhou 510006, P. R. China
- Innovation Center for Tissue Restoration and Reconstruction, South China University of Technology, Guangzhou 510006, P. R. China
| | - Wenjing Song
- School of Materials Science and Engineering, South China University of Technology, Guangzhou 510006, P. R. China
- National Engineering Research Center for Tissue Restoration and Reconstruction, Guangzhou 510006, P. R. China
- Key Laboratory of Biomedical Engineering of Guangdong Province, South China University of Technology, Guangzhou 510006, P. R. China
| | - Dawei Qi
- School of Materials Science and Engineering, South China University of Technology, Guangzhou 510006, P. R. China
- National Engineering Research Center for Tissue Restoration and Reconstruction, Guangzhou 510006, P. R. China
- Key Laboratory of Biomedical Engineering of Guangdong Province, South China University of Technology, Guangzhou 510006, P. R. China
| | - Jiahong Jin
- School of Materials Science and Engineering, South China University of Technology, Guangzhou 510006, P. R. China
- National Engineering Research Center for Tissue Restoration and Reconstruction, Guangzhou 510006, P. R. China
- Key Laboratory of Biomedical Engineering of Guangdong Province, South China University of Technology, Guangzhou 510006, P. R. China
| | - Jia Liu
- School of Materials Science and Engineering, South China University of Technology, Guangzhou 510006, P. R. China
- National Engineering Research Center for Tissue Restoration and Reconstruction, Guangzhou 510006, P. R. China
- Key Laboratory of Biomedical Engineering of Guangdong Province, South China University of Technology, Guangzhou 510006, P. R. China
| | - Li Ren
- School of Materials Science and Engineering, South China University of Technology, Guangzhou 510006, P. R. China
- National Engineering Research Center for Tissue Restoration and Reconstruction, Guangzhou 510006, P. R. China
- Key Laboratory of Biomedical Engineering of Guangdong Province, South China University of Technology, Guangzhou 510006, P. R. China
- Key Laboratory of Biomedical Materials and Engineering of the Ministry of Education, South China University of Technology, Guangzhou 510006, P. R. China
- Innovation Center for Tissue Restoration and Reconstruction, South China University of Technology, Guangzhou 510006, P. R. China
| |
Collapse
|
5
|
Jangamreddy JR, Haagdorens MKC, Mirazul Islam M, Lewis P, Samanta A, Fagerholm P, Liszka A, Ljunggren MK, Buznyk O, Alarcon EI, Zakaria N, Meek KM, Griffith M. Short peptide analogs as alternatives to collagen in pro-regenerative corneal implants. Acta Biomater 2018; 69:120-130. [PMID: 29355715 PMCID: PMC5842042 DOI: 10.1016/j.actbio.2018.01.011] [Citation(s) in RCA: 39] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2017] [Revised: 01/08/2018] [Accepted: 01/10/2018] [Indexed: 12/13/2022]
Abstract
Short collagen-like peptides (CLPs) are being proposed as alternatives to full-length collagen for use in tissue engineering, on their own as soft hydrogels, or conjugated to synthetic polymer for mechanical strength. However, despite intended clinical use, little is known about their safety and efficacy, mechanism of action or degree of similarity to the full-length counterparts they mimic. Here, we show the functional equivalence of a CLP conjugated to polyethylene glycol (CLP-PEG) to full-length recombinant human collagen in vitro and in promoting stable regeneration of corneal tissue and nerves in a pre-clinical mini-pig model. We also show that these peptide analogs exerted their pro-regeneration effects through stimulating extracellular vesicle production by host cells. Our results support future use of CLP-PEG implants for corneal regeneration, suggesting the feasibility of these or similar peptide analogs in clinical application in the eye and other tissues. Statement of significance Although biomaterials comprising full-length recombinant human collagen and extracted animal collagen have been evaluated and used clinically, these macromolecules provide only a limited number of functional groups amenable to chemical modification or crosslinking and are demanding to process. Synthetic, customizable analogs that are functionally equivalent, and can be readily scaled-up are therefore very desirable for pre-clinical to clinical translation. Here, we demonstrate, using cornea regeneration as our test bed, that collagen-like-peptides conjugated to multifunctional polyethylene glycol (CLP-PEG) when grafted into mini-pigs as corneal implants were functionally equivalent to recombinant human collagen-based implants that were successfully tested in patients. We also show for the first time that these materials affected regeneration through stimulation of extracellular vesicle production by endogenous host cells that have migrated into the CLP-PEG scaffolds.
Collapse
Affiliation(s)
- Jaganmohan R Jangamreddy
- Dept. of Clinical and Experimental Medicine, Linköping University, S-58185 Linköping, Sweden; Tej Kohli Cornea Institute, LV Prasad Eye Institute, Hyderabad - 500 034, India
| | - Michel K C Haagdorens
- Dept. of Ophthalmology, Antwerp University Hospital, Wilrijkstraat 10, B-2650 Antwerp, Belgium; Faculty of Medicine and Health Sciences, Department of Ophthalmology, Visual Optics and Visual Rehabilitation, University of Antwerp, Campus Drie Eiken, Universiteitsplein 1, 2610 Antwerp, Belgium
| | - M Mirazul Islam
- Dept. of Clinical and Experimental Medicine, Linköping University, S-58185 Linköping, Sweden
| | - Philip Lewis
- Structural Biophysics Group, School of Optometry and Vision Sciences, Cardiff University, Wales CF24 4HQ, UK
| | - Ayan Samanta
- Dept. of Clinical and Experimental Medicine, Linköping University, S-58185 Linköping, Sweden
| | - Per Fagerholm
- Dept. of Clinical and Experimental Medicine, Linköping University, S-58185 Linköping, Sweden
| | - Aneta Liszka
- Dept. of Clinical and Experimental Medicine, Linköping University, S-58185 Linköping, Sweden
| | - Monika K Ljunggren
- Dept. of Clinical and Experimental Medicine, Linköping University, S-58185 Linköping, Sweden
| | - Oleksiy Buznyk
- Dept. of Clinical and Experimental Medicine, Linköping University, S-58185 Linköping, Sweden
| | - Emilio I Alarcon
- Division of Cardiac Surgery, University of Ottawa Heart Institute, 40 Ruskin Street, Ottawa, ON K1Y 4W7, Canada
| | - Nadia Zakaria
- Dept. of Ophthalmology, Antwerp University Hospital, Wilrijkstraat 10, B-2650 Antwerp, Belgium; Faculty of Medicine and Health Sciences, Department of Ophthalmology, Visual Optics and Visual Rehabilitation, University of Antwerp, Campus Drie Eiken, Universiteitsplein 1, 2610 Antwerp, Belgium.
| | - Keith M Meek
- Structural Biophysics Group, School of Optometry and Vision Sciences, Cardiff University, Wales CF24 4HQ, UK.
| | - May Griffith
- Dept. of Clinical and Experimental Medicine, Linköping University, S-58185 Linköping, Sweden; Maisonneuve-Rosemont Hospital Research Centre and Dept. of Ophthalmology, University of Montreal, Montreal, QC H1T 4B3, Canada.
| |
Collapse
|
6
|
Islam MM, Buznyk O, Reddy JC, Pasyechnikova N, Alarcon EI, Hayes S, Lewis P, Fagerholm P, He C, Iakymenko S, Liu W, Meek KM, Sangwan VS, Griffith M. Biomaterials-enabled cornea regeneration in patients at high risk for rejection of donor tissue transplantation. NPJ Regen Med 2018; 3:2. [PMID: 29423280 PMCID: PMC5792605 DOI: 10.1038/s41536-017-0038-8] [Citation(s) in RCA: 61] [Impact Index Per Article: 10.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2017] [Revised: 12/06/2017] [Accepted: 12/12/2017] [Indexed: 12/13/2022] Open
Abstract
The severe worldwide shortage of donor organs, and severe pathologies placing patients at high risk for rejecting conventional cornea transplantation, have left many corneal blind patients untreated. Following successful pre-clinical evaluation in mini-pigs, we tested a biomaterials-enabled pro-regeneration strategy to restore corneal integrity in an open-label observational study of six patients. Cell-free corneal implants comprising recombinant human collagen and phosphorylcholine were grafted by anterior lamellar keratoplasty into corneas of unilaterally blind patients diagnosed at high-risk for rejecting donor allografts. They were followed-up for a mean of 24 months. Patients with acute disease (ulceration) were relieved of pain and discomfort within 1–2 weeks post-operation. Patients with scarred or ulcerated corneas from severe infection showed better vision improvement, followed by corneas with burns. Corneas with immune or degenerative conditions transplanted for symptom relief only showed no vision improvement overall. However, grafting promoted nerve regeneration as observed by improved touch sensitivity to near normal levels in all patients tested, even for those with little/no sensitivity before treatment. Overall, three out of six patients showed significant vision improvement. Others were sufficiently stabilized to allow follow-on surgery to restore vision. Grafting outcomes in mini-pig corneas were superior to those in human subjects, emphasizing that animal models are only predictive for patients with non-severely pathological corneas; however, for establishing parameters such as stable corneal tissue and nerve regeneration, our pig model is satisfactory. While further testing is merited, we have nevertheless shown that cell-free implants are potentially safe, efficacious options for treating high-risk patients. A biomaterial implant supports the regeneration of severely damaged corneas in patients at high risk for rejecting conventional transplantation. An international team from Canada, China, India, Sweden, Ukraine and United Kingdom used mini-pigs to confirm the safety of implanting cell-free corneas made from recombinant human collagen and a synthetic lipid, before examining the effects of implantation on human vision in seven patients. The implants were well-tolerated and led to significant vision improvement in patients with damaged corneas due to infection. Furthermore, within two weeks of surgery the implants had relieved pain. Over two years, sensitivity to touch improved, suggesting an ability to promote nerve regeneration. This study supports the use of animal models to test biomaterials designed for medical applications and describes a safe and promising option for treating patients that not treatable by conventional corneal transplantation.
Collapse
Affiliation(s)
- M Mirazul Islam
- 1Department of Clinical and Experimental Medicine, Linköping University, Linköping, Sweden.,2Schepens Eye Research Institute and Massachusetts Eye and Ear Infirmary, Harvard Medical School, Boston, MA USA
| | - Oleksiy Buznyk
- 1Department of Clinical and Experimental Medicine, Linköping University, Linköping, Sweden.,Filatov Institute of Eye Diseases and Tissue Therapy of the NAMS of Ukraine, Odessa, Ukraine
| | - Jagadesh C Reddy
- 4Tej Kohli Cornea Institute, LV Prasad Eye Institute, Hyderabad, India
| | - Nataliya Pasyechnikova
- Filatov Institute of Eye Diseases and Tissue Therapy of the NAMS of Ukraine, Odessa, Ukraine
| | - Emilio I Alarcon
- 5Division of Cardiac Surgery, University of Ottawa Heart Institute, Ottawa, ON Canada
| | - Sally Hayes
- 6School of Optometry and Vision Sciences College of Biomedical and Life Sciences, Cardiff University, Cardiff, UK.,7Cardiff Institute for Tissue Engineering and Repair (CITER), Cardiff University, Cardiff, UK
| | - Philip Lewis
- 6School of Optometry and Vision Sciences College of Biomedical and Life Sciences, Cardiff University, Cardiff, UK.,7Cardiff Institute for Tissue Engineering and Repair (CITER), Cardiff University, Cardiff, UK
| | - Per Fagerholm
- 1Department of Clinical and Experimental Medicine, Linköping University, Linköping, Sweden
| | - Chaoliang He
- 8Key Laboratory of Polymer Eco-materials, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, China
| | - Stanislav Iakymenko
- Filatov Institute of Eye Diseases and Tissue Therapy of the NAMS of Ukraine, Odessa, Ukraine
| | - Wenguang Liu
- 9School of Materials Science and Engineering, Tianjin University, Tianjin, China
| | - Keith M Meek
- 6School of Optometry and Vision Sciences College of Biomedical and Life Sciences, Cardiff University, Cardiff, UK.,7Cardiff Institute for Tissue Engineering and Repair (CITER), Cardiff University, Cardiff, UK
| | | | - May Griffith
- 1Department of Clinical and Experimental Medicine, Linköping University, Linköping, Sweden.,4Tej Kohli Cornea Institute, LV Prasad Eye Institute, Hyderabad, India.,10Department of Ophthalmology and Maisonneuve-Rosemont Hospital Research Centre, University of Montreal, Montreal, Canada
| |
Collapse
|
7
|
Brunette I, Roberts CJ, Vidal F, Harissi-Dagher M, Lachaine J, Sheardown H, Durr GM, Proulx S, Griffith M. Alternatives to eye bank native tissue for corneal stromal replacement. Prog Retin Eye Res 2017; 59:97-130. [DOI: 10.1016/j.preteyeres.2017.04.002] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2016] [Revised: 04/15/2017] [Accepted: 04/21/2017] [Indexed: 12/13/2022]
|
8
|
Wang X, Fan CH, Gao Y, Duan L, Dang GF. Clinical outcomes of non-torque pattern double running suture technique for optical penetrating keratoplasty. Int J Clin Exp Med 2015; 8:2607-2613. [PMID: 25932208 PMCID: PMC4402855] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2014] [Accepted: 01/21/2015] [Indexed: 06/04/2023]
Abstract
OBJECTIVE To validate non-torque pattern double running suture technique for optical penetrating keratoplasty compared with traditional suture method. METHODS 56 patients (56 eyes) undergoing optical penetrating keratoplasty were divided into two groups. The experimental group (28 cases) underwent non-torque pattern double running suture technique, and the control group (28 cases) underwent interrupted suture. All participants were followed up at 2 weeks, 2 months, 6 months, and 1 year postoperatively. The best corrected visual acuity (BCVA), corneal curvature change and astigmatism change were observed and compared between the two groups, and corneal topographer was used to measure refractive change. RESULTS BCVA in experimental group was significantly improved (P<0.05); the corneal topographer showed that astigmatism in experimental group was significantly lower than that in control group at the early postoperative phase (P<0.001). Six months later postoperatively, astigmatism gap between the two groups was narrowed, but the differences were still statistically significant (P<0.001). Twelve months later, astigmatism in the experimental group was similar to six months ago, but astigmatism in control group reduced significantly. No significant difference in astigmatism was observed between two groups (P>0.05). CONCLUSION Non-torque pattern double running suture technique for optical penetrating keratoplasty can achieve the BCVA at the very early phase, with stable postoperative refractive status. This novel suture method is accurate and safe with elegant appearance.
Collapse
Affiliation(s)
- Xu Wang
- Department of Ophthalmology, Shandong Provincial Qianfoshan Hospital, Medical School of Shandong UniversityJinan, China
| | - Chong-Hui Fan
- Department of Ophthalmology, Longkou Longkuang Central HospitalYantai, China
| | - Yang Gao
- Department of Ophthalmology, Shandong Provincial Qianfoshan Hospital, Medical School of Shandong UniversityJinan, China
| | - Lian Duan
- Department of Ophthalmology, Shandong Provincial Qianfoshan Hospital, Medical School of Shandong UniversityJinan, China
| | - Guang-Fu Dang
- Department of Ophthalmology, Shandong Provincial Qianfoshan Hospital, Medical School of Shandong UniversityJinan, China
| |
Collapse
|