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Jin L, Zhang L, Yan C, Liu M, Dean DC, Liu Y. Corneal injury repair and the potential involvement of ZEB1. EYE AND VISION (LONDON, ENGLAND) 2024; 11:20. [PMID: 38822380 PMCID: PMC11143703 DOI: 10.1186/s40662-024-00387-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/27/2024] [Accepted: 05/07/2024] [Indexed: 06/03/2024]
Abstract
The cornea, consisting of three cellular and two non-cellular layers, is the outermost part of the eyeball and frequently injured by external physical, chemical, and microbial insults. The epithelial-to-mesenchymal transition (EMT) plays a crucial role in the repair of corneal injuries. Zinc finger E-box binding homeobox 1 (ZEB1), an important transcription factor involved in EMT, is expressed in the corneal tissues. It regulates cell activities like migration, transformation, and proliferation, and thereby affects tissue inflammation, fibrosis, tumor metastasis, and necrosis by mediating various major signaling pathways, including transforming growth factor (TGF)-β. Dysfunction of ZEB1 would impair corneal tissue repair leading to epithelial healing delay, interstitial fibrosis, neovascularization, and squamous cell metaplasia. Understanding the mechanism underlying ZEB1 regulation of corneal injury repair will help us to formulate a therapeutic approach to enhance corneal injury repair.
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Affiliation(s)
- Lin Jin
- Department of Ophthalmology, The Third People's Hospital of Dalian, Dalian Medical University, Dalian, 116033, China
| | - Lijun Zhang
- Department of Ophthalmology, The Third People's Hospital of Dalian, Dalian Medical University, Dalian, 116033, China
| | - Chunxiao Yan
- Department of Ophthalmology, The Third People's Hospital of Dalian, Dalian Medical University, Dalian, 116033, China
| | - Mengxin Liu
- Department of Ophthalmology, The Third People's Hospital of Dalian, Dalian Medical University, Dalian, 116033, China
| | - Douglas C Dean
- James Brown Cancer Center, University of Louisville School of Medicine, Louisville, KY, 40202, USA.
- Department of Medicine, University of Louisville School of Medicine, Louisville, KY, 40202, USA.
| | - Yongqing Liu
- James Brown Cancer Center, University of Louisville School of Medicine, Louisville, KY, 40202, USA.
- Department of Medicine, University of Louisville School of Medicine, Louisville, KY, 40202, USA.
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2
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Yang C, Nguyen DD, Lai J. Poly(l-Histidine)-Mediated On-Demand Therapeutic Delivery of Roughened Ceria Nanocages for Treatment of Chemical Eye Injury. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2023; 10:e2302174. [PMID: 37430140 PMCID: PMC10502830 DOI: 10.1002/advs.202302174] [Citation(s) in RCA: 16] [Impact Index Per Article: 16.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/04/2023] [Revised: 06/10/2023] [Indexed: 07/12/2023]
Abstract
Development of topical bioactive formulations capable of overcoming the low bioavailability of conventional eye drops is critically important for efficient management of ocular chemical burns. Herein, a nanomedicine strategy is presented to harness the surface roughness-controlled ceria nanocages (SRCNs) and poly(l-histidine) surface coatings for triggering multiple bioactive roles of intrinsically therapeutic nanocarriers and promoting transport across corneal epithelial barriers as well as achieving on-demand release of dual drugs [acetylcholine chloride (ACh) and SB431542] at the lesion site. Specifically, the high surface roughness helps improve cellular uptake and therapeutic activity of SRCNs while exerting a negligible impact on good ocular biocompatibility of the nanomaterials. Moreover, the high poly(l-histidine) coating amount can endow the SRCNs with an ≈24-fold enhancement in corneal penetration and an effective smart release of ACh and SB431542 in response to endogenous pH changes caused by tissue injury/inflammation. In a rat model of alkali burn, topical single-dose nanoformulation can efficaciously reduce corneal wound areas (19-fold improvement as compared to a marketed eye drops), attenuate ≈93% abnormal blood vessels, and restore corneal transparency to almost normal at 4 days post-administration, suggesting great promise for designing multifunctional metallic nanotherapeutics for ocular pharmacology and tissue regenerative medicine.
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Affiliation(s)
- Chia‐Jung Yang
- Department of Biomedical EngineeringChang Gung UniversityTaoyuan33302Taiwan
| | - Duc Dung Nguyen
- Department of Biomedical EngineeringChang Gung UniversityTaoyuan33302Taiwan
| | - Jui‐Yang Lai
- Department of Biomedical EngineeringChang Gung UniversityTaoyuan33302Taiwan
- Department of OphthalmologyChang Gung Memorial Hospital, LinkouTaoyuan33305Taiwan
- Department of Materials EngineeringMing Chi University of TechnologyNew Taipei City24301Taiwan
- Research Center for Chinese Herbal MedicineCollege of Human EcologyChang Gung University of Science and TechnologyTaoyuan33303Taiwan
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3
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Resan M, Cvejic Z, Pancevski I, Thumann G, Kropp M, Guber I, Ristic D, Vojvodic D, Pajic B. Interleukin 12 in the Acute Phase of the Immune Response after Excimer Laser Treatment. J Clin Med 2023; 12:4472. [PMID: 37445506 DOI: 10.3390/jcm12134472] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2023] [Revised: 06/20/2023] [Accepted: 06/30/2023] [Indexed: 07/15/2023] Open
Abstract
BACKGROUND AND OBJECTIVES The aim of the research was to investigate the differences in the concentrations of IL-12, IL-4, IL-10, and IFN-γ in tears after LASIK and PRK procedures. MATERIALS AND METHODS The study included 68 myopic eyes up to -3.0 D refractive spherical equivalent, divided into two groups: Group 1 LASIK (n = 31) and Group 2 PRK (n = 37). Three tear samples were taken from each eye: immediately before the procedure (t0), 1 h after the procedure (t1), and 24 h after the procedure (t2). The concentrations of IL-12p70, IL-4, IL-10, and IFN-γ in the tear samples were determined by flow cytometry. Participants were not taking anti-inflammatory therapy 24 h after the procedure. RESULTS IL-4 levels 1 h after treatment did not differ between LASIK and PRK (p = 0.990), while 24 h after PRK there was a significant decrease in IL-4 levels (p < 0.05), but not after LASIK (p = 0.476). In both the LASIK (p < 0.05) and PRK (p < 0.05) groups, there is an increase in IL-10 concentrations 1 h after treatment, which persists 24 h after LASIK (p < 0.05) but not after PRK (p = 0.081). There is an increase in IL-12p70 concentration 1 h after treatment in both the LASIK (p < 0.001) and PRK groups (p < 0.001). There is also an increase in IL-12p70 concentration 24 h after PRK (p < 0.005), but not after LASIK (p = 0.775). CONCLUSIONS IL-4 concentration shows a significantly higher value in the LASIK group than in the PRK group after 24 h. IL-10 and IL-12p70 levels increase one hour after surgery in both groups. After 24 h, the IL-10 levels remain elevated in the LASIK group, and the IL-12p70 levels remain elevated in the PRK group. Thus, LASIK and PRK procedures show different inflammatory dynamics.
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Affiliation(s)
- Mirko Resan
- Eye Clinic, Military Medical Academy, 11000 Belgrade, Serbia
- Faculty of Medicine of the Military Medical Academy, University of Defense, 11000 Belgrade, Serbia
- Department of Physics, Faculty of Sciences, University of Novi Sad, 21000 Novi Sad, Serbia
| | - Zeljka Cvejic
- Department of Physics, Faculty of Sciences, University of Novi Sad, 21000 Novi Sad, Serbia
| | - Igor Pancevski
- Eye Clinic, Military Medical Academy, 11000 Belgrade, Serbia
- Faculty of Medicine of the Military Medical Academy, University of Defense, 11000 Belgrade, Serbia
| | - Gabriele Thumann
- Division of Ophthalmology, Department of Clinical Neurosciences, Geneva University Hospitals, 1205 Geneva, Switzerland
- Experimental Ophthalmology, University of Geneva, 1205 Geneva, Switzerland
| | - Martina Kropp
- Division of Ophthalmology, Department of Clinical Neurosciences, Geneva University Hospitals, 1205 Geneva, Switzerland
- Experimental Ophthalmology, University of Geneva, 1205 Geneva, Switzerland
| | - Ivo Guber
- Division of Ophthalmology, Department of Clinical Neurosciences, Geneva University Hospitals, 1205 Geneva, Switzerland
| | - Dragana Ristic
- Eye Clinic, Military Medical Academy, 11000 Belgrade, Serbia
- Faculty of Medicine of the Military Medical Academy, University of Defense, 11000 Belgrade, Serbia
| | - Danilo Vojvodic
- Faculty of Medicine of the Military Medical Academy, University of Defense, 11000 Belgrade, Serbia
- Department for Clinical and Experimental Immunology, Institute for Medical Research, Military Medical Academy, 11000 Belgrade, Serbia
| | - Bojan Pajic
- Faculty of Medicine of the Military Medical Academy, University of Defense, 11000 Belgrade, Serbia
- Department of Physics, Faculty of Sciences, University of Novi Sad, 21000 Novi Sad, Serbia
- Division of Ophthalmology, Department of Clinical Neurosciences, Geneva University Hospitals, 1205 Geneva, Switzerland
- Experimental Ophthalmology, University of Geneva, 1205 Geneva, Switzerland
- Eye Clinic ORASIS, Swiss Eye Research Foundation, 5734 Reinach, Switzerland
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4
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Deva JP, Ngeow YF, Zin T. The association between VSX1 exon3 gene variants and keratoconus in Malaysian patients. Indian J Ophthalmol 2023; 71:2443-2447. [PMID: 37322657 PMCID: PMC10418017 DOI: 10.4103/ijo.ijo_2894_22] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2022] [Revised: 03/22/2023] [Accepted: 03/24/2023] [Indexed: 06/17/2023] Open
Abstract
Purpose This case-control study aims to examine possible associations of VSX1 exon3 gene variants with the development of keratoconus (KC) in Malaysian patients. Methods A case-control study was done on 42 keratoconus cases, 127 family member controls, and 96 normal controls. Results Three gene variants, p.A182A, p.P237P, and p.R217H showed significant associations with keratoconus (P < 0.05). While p.A182A and p.P227P were more prevalent than in the family and normal controls (OR 3.14-4.05), the reverse was observed with p.R217H (OR 0.086-1.59). With Haploview analysis, p.A182A and p.P237P were shown to be in linkage disequilibrium (LD) (LOD (logarithm of the odds score) score of 2.0, r2 of 0.957, and 95% confidence interval (CI) of 0.96-1.00). Conclusion The study results suggest that the p.A182A and p.P237P variants could have contributed to the development of keratoconus in some Malaysians and that these two variants are likely to be co-inherited. In contrast, the p.R217H variant appeared to confer some protection against the development of keratoconus.
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Affiliation(s)
- Jenny P Deva
- Faculty of Medicine and Health Sciences, Universiti Tunku Abdul Rahman, Sg Long, Malaysia
| | - Yun F Ngeow
- Faculty of Medicine and Health Sciences, Universiti Tunku Abdul Rahman, Sg Long, Malaysia
| | - Thaw Zin
- Faculty of Medicine and Health Sciences, Universiti Tunku Abdul Rahman, Sg Long, Malaysia
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Bhend ME, Kempuraj D, Sinha NR, Gupta S, Mohan RR. Role of aquaporins in corneal healing post chemical injury. Exp Eye Res 2023; 228:109390. [PMID: 36696947 PMCID: PMC9975064 DOI: 10.1016/j.exer.2023.109390] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2022] [Revised: 12/31/2022] [Accepted: 01/19/2023] [Indexed: 01/23/2023]
Abstract
Aquaporins (AQPs) are transmembrane water channel proteins that regulate the movement of water through the plasma membrane in various tissues including cornea. The cornea is avascular and has specialized microcirculatory mechanisms for homeostasis. AQPs regulate corneal hydration and transparency for normal vision. Currently, there are 13 known isoforms of AQPs that can be subclassified as orthodox AQPs, aquaglyceroporins (AQGPs), or supraquaporins (SAQPs)/unorthodox AQPs. AQPs are implicated in keratocyte function, inflammation, edema, angiogenesis, microvessel proliferation, and the wound-healing process in the cornea. AQPs play an important role in wound healing by facilitating the movement of corneal stromal keratocytes by squeezing through tight stromal matrix and narrow extracellular spaces to the wound site. Deficiency of AQPs can cause reduced concentration of hepatocyte growth factor (HGF) leading to reduced epithelial proliferation, reduced/impaired keratocyte migration, reduced number of keratocytes in the injury site, delayed and abnormal wound healing process. Dysregulated AQPs cause dysfunction in osmolar homeostasis as well as wound healing mechanisms. The cornea is a transparent avascular tissue that constitutes the anterior aspect of the outer covering of the eye and aids in two-thirds of visual light refraction. Being the outermost layer of the eye, the cornea is prone to injury. Of the 13 AQP isoforms, AQP1 is expressed in the stromal keratocytes and endothelial cells, and AQP3 and AQP5 are expressed in epithelial cells in the human cornea. AQPs can facilitate wound healing through aid in cellular migration, proliferation, migration, extracellular matrix (ECM) remodeling and autophagy mechanism. Corneal wound healing post-chemical injury requires an integrative and coordinated activity of the epithelium, stromal keratocytes, endothelium, ECM, and a battery of cytokines and growth factors to restore corneal transparency. If the chemical injury is mild, the cornea will heal with normal clarity, but severe injuries can lead to partial and/or permanent loss of corneal functions. Currently, the role of AQPs in corneal wound healing is poorly understood in the context of chemical injury. This review discusses the current literature and the role of AQPs in corneal homeostasis, wound repair, and potential therapeutic target for acute and chronic corneal injuries.
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Affiliation(s)
- Madeline E Bhend
- Department of Ophthalmology, College of Veterinary Medicine, University of Missouri, Columbia, MO, USA; School of Medicine, University of South Carolina, Columbia, SC, USA; Mason Eye Institute, School of Medicine, University of Missouri, Columbia, MO, USA
| | - Duraisamy Kempuraj
- Department of Ophthalmology, College of Veterinary Medicine, University of Missouri, Columbia, MO, USA; Institute for Neuro-Immune Medicine, Dr. Kiran C. Patel College of Osteopathic Medicine, Nova Southeastern University, Ft. Lauderdale, FL, USA
| | - Nishant R Sinha
- Department of Ophthalmology, College of Veterinary Medicine, University of Missouri, Columbia, MO, USA; Harry S. Truman Memorial Veterans' Hospital, Columbia, MO, USA
| | - Suneel Gupta
- Department of Ophthalmology, College of Veterinary Medicine, University of Missouri, Columbia, MO, USA; Harry S. Truman Memorial Veterans' Hospital, Columbia, MO, USA
| | - Rajiv R Mohan
- Department of Ophthalmology, College of Veterinary Medicine, University of Missouri, Columbia, MO, USA; Harry S. Truman Memorial Veterans' Hospital, Columbia, MO, USA; Mason Eye Institute, School of Medicine, University of Missouri, Columbia, MO, USA.
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6
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Tavakkoli F, Eleiwa TK, Elhusseiny AM, Damala M, Rai AK, Cheraqpour K, Ansari MH, Doroudian M, H Keshel S, Soleimani M, Djalilian AR, Sangwan VS, Singh V. Corneal stem cells niche and homeostasis impacts in regenerative medicine; concise review. Eur J Ophthalmol 2023:11206721221150065. [PMID: 36604831 DOI: 10.1177/11206721221150065] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
The limbal stem cells niche (LSCN) is an optimal microenvironment that provides the limbal epithelial stem cells (LESCs) and strictly regulates their proliferation and differentiation. Disturbing the LSCN homeostasis can lead to limbal stem cell dysfunction (LSCD) and subsequent ocular surface aberrations, such as corneal stromal inflammation, persistent epithelial defects, corneal neovascularisation, lymphangiogenesis, corneal opacification, and conjunctivalization. As ocular surface disorders are considered the second main cause of blindness, it becomes crucial to explore different therapeutic strategies for restoring the functions of the LSCN. A major limitation of corneal transplantation is the current shortage of donor tissue to meet the requirements worldwide. In this context, it becomes mandatory to find an alternative regenerative medicine, such as using cultured limbal epithelial/stromal stem cells, inducing the production of corneal like cells by using other sources of stem cells, and using tissue engineering methods aiming to produce the three-dimensional (3D) printed cornea. Limbal epithelial stem cells have been considered the magic potion for eye treatment. Epithelial and stromal stem cells in the limbal niche hold the responsibility of replenishing the corneal epithelium. These stem cells are being used for transplantation to maintain corneal epithelial integrity and ultimately sustain optimal vision. In this review, we summarised the characteristics of the LSCN and their current and future roles in restoring corneal homeostasis in eyes with LSCD.
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Affiliation(s)
- Fatemeh Tavakkoli
- Department of Community Health, College of Health Technology, Cihan University, Erbil, Iraq.,SSR Stem Cell Biology Laboratory, Brien Holden Eye Research Centre, Centre for Ocular Regeneration, Hyderabad Eye Research Foundation, L.V. Prasad Eye Institute, Hyderabad, India.,Centre for Genetic Disorders, Banaras Hindu University, Varanasi, India
| | - Taher K Eleiwa
- Department of Ophthalmology, Benha University, Benha, Egypt
| | - Abdelrahman M Elhusseiny
- Department of Ophthalmology, Harvey and Bernice Jones Eye Institute, University of Arkansas for Medical Sciences, Little Rock, AR, USA
| | - Mukesh Damala
- SSR Stem Cell Biology Laboratory, Brien Holden Eye Research Centre, Centre for Ocular Regeneration, Hyderabad Eye Research Foundation, L.V. Prasad Eye Institute, Hyderabad, India.,School of Life Sciences, University of Hyderabad, Hyderabad, India
| | - Amit K Rai
- Centre for Genetic Disorders, Banaras Hindu University, Varanasi, India
| | - Kasra Cheraqpour
- Translational Eye Research Center, Farabi Eye Hospital, 48439Tehran University of Medical Sciences, Tehran, Iran
| | - Mohammad H Ansari
- Ophthalmic Research Center, Department of Ophthalmology, Labbafinejad Medical Center, 556492Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Mohammad Doroudian
- Department of Cell and Molecular Biology, Faculty of Biological Sciences, 145440Kharazmi University, Tehran, Iran
| | - Saeed H Keshel
- Department of Tissue Engineering and Applied Cell Sciences, 556492Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Mohammad Soleimani
- Department of Ophthalmology, 159636Illinois Eye and Ear Infirmary, University of Illinois at Chicago, Chicago, IL, USA
| | - Ali R Djalilian
- Department of Ophthalmology, 159636Illinois Eye and Ear Infirmary, University of Illinois at Chicago, Chicago, IL, USA
| | | | - Vivek Singh
- SSR Stem Cell Biology Laboratory, Brien Holden Eye Research Centre, Centre for Ocular Regeneration, Hyderabad Eye Research Foundation, L.V. Prasad Eye Institute, Hyderabad, India
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7
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Ma S, Yin J, Hao L, Liu X, Shi Q, Diao Y, Yu G, Liu L, Chen J, Zhong J. Exosomes From Human Umbilical Cord Mesenchymal Stem Cells Treat Corneal Injury via Autophagy Activation. Front Bioeng Biotechnol 2022; 10:879192. [PMID: 35519619 PMCID: PMC9063640 DOI: 10.3389/fbioe.2022.879192] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2022] [Accepted: 03/16/2022] [Indexed: 12/21/2022] Open
Abstract
Corneal injury (CI) affects corneal integrity and transparency, deteriorating the patient's quality of life. This study aimed to explore the molecular mechanisms by which exosomes secreted from human umbilical cord mesenchymal stem cells (hucMSC-Exos) affect autophagy in human corneal epithelial cells (HCECs) and CI models. We isolated and identified hucMSC-Exos using nanoparticle tracking analysis, transmission electron microscopy, and western blotting. The effects of hucMSC-Exos combined with autophagy regulators on HCECs and CI mice were assessed using cell viability assays, scratch assay, cell cycle assay, apoptosis assay, corneal fluorescein staining, haze grades, pathological examinations, western blotting, and quantitative polymerase chain reaction (qPCR). In vitro results indicated that hucMSC-Exos combined with the autophagy activator had positive effects in promoting the cell proliferation, migration capacity, and the cell cycle by upregulating the proportions of cells in the S phase and the expression of PCNA, Cyclin A, Cyclin E, and CDK2. Meanwhile, the combination treatment reduced the apoptotic rate of HCECs. In vivo results indicated that hucMSC-Exos especially combined them with the autophagy activator significantly alleviated corneal epithelial defects and stromal opacity, reduced the levels of the apoptotic markers Bax and cleaved Caspase-3, reduced the inflammatory response products TNF-α, IL-1β, IL-6, and CXCL-2, and increased the Bcl-2. This was achieved by upregulating pAMPK/AMPK and pULK1/ULK1 ratios, and Beclin-1 and LC3B II/I, and by downregulating the pmTOR/mTOR ratio and p62. In contrast, clinical indications, apoptosis, and inflammation were aggravated after the application of the autophagy inhibitor. HucMSC-Exos combined with an autophagy activator significantly enhanced HCECs functions and alleviated corneal defects, apoptosis, and inflammation by activating the autophagy signaling pathway, AMPK-mTOR-ULK1, providing a new biological therapy for corneal wound healing and ocular surface regeneration.
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Affiliation(s)
- Shisi Ma
- Department of Ophthalmology, The First Affiliated Hospital of Jinan University, Jinan University, Guangzhou, China
| | - Jiayang Yin
- Department of Ophthalmology, The First Affiliated Hospital of Jinan University, Jinan University, Guangzhou, China
| | - Lili Hao
- Department of Ophthalmology, The First Affiliated Hospital of Jinan University, Jinan University, Guangzhou, China
| | - Xiao Liu
- Department of Ophthalmology, The First Affiliated Hospital of Jinan University, Jinan University, Guangzhou, China
| | - Qi Shi
- Department of Ophthalmology, The First Affiliated Hospital of Jinan University, Jinan University, Guangzhou, China
| | - Yuyao Diao
- Department of Ophthalmology, The First Affiliated Hospital of Jinan University, Jinan University, Guangzhou, China
| | - Guocheng Yu
- Department of Ophthalmology, The First Affiliated Hospital of Jinan University, Jinan University, Guangzhou, China
| | - Lian Liu
- Department of Ophthalmology, The First Affiliated Hospital of Jinan University, Jinan University, Guangzhou, China
| | - Jiansu Chen
- Department of Ophthalmology, The First Affiliated Hospital of Jinan University, Jinan University, Guangzhou, China
- Institute of Ophthalmology, Medical College, Jinan University, Guangzhou, China
| | - Jingxiang Zhong
- Department of Ophthalmology, The First Affiliated Hospital of Jinan University, Jinan University, Guangzhou, China
- The Sixth Affiliated Hospital of Jinan University, Jinan University, Dongguan, China
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8
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An J, Zeng Y, Liu H, Huang L, Yao J, Hou E, Zhang X. Corneal neovascularization inhibition and wound healing impregnability of conbercept on rabbit cornea after penetrating keratoplasty. Cutan Ocul Toxicol 2022; 41:98-104. [PMID: 35373690 DOI: 10.1080/15569527.2022.2050745] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Affiliation(s)
- Jianbin An
- The Second Hospital of Hebei Medical University, Shijiazhuang, China
| | - Yue Zeng
- Baoding NO.1 Central Hospital, Baoding, China
| | - Huan Liu
- Division of Ocular Injuries, Department of Ophthalmology, The Third Hospital of Hebei Medical University, Shijiazhuang, China
- Hebei OPO Eye Bank, The Third Affiliated Hospital of Hebei Medical University, Shijiazhuang, China
| | - Liying Huang
- Division of Ocular Injuries, Department of Ophthalmology, The Third Hospital of Hebei Medical University, Shijiazhuang, China
- Hebei OPO Eye Bank, The Third Affiliated Hospital of Hebei Medical University, Shijiazhuang, China
| | - Jia Yao
- Division of Ocular Injuries, Department of Ophthalmology, The Third Hospital of Hebei Medical University, Shijiazhuang, China
- Hebei OPO Eye Bank, The Third Affiliated Hospital of Hebei Medical University, Shijiazhuang, China
| | - Enchong Hou
- Division of Ocular Injuries, Department of Ophthalmology, The Third Hospital of Hebei Medical University, Shijiazhuang, China
- Hebei OPO Eye Bank, The Third Affiliated Hospital of Hebei Medical University, Shijiazhuang, China
| | - Xiaorong Zhang
- Division of Ocular Injuries, Department of Ophthalmology, The Third Hospital of Hebei Medical University, Shijiazhuang, China
- Hebei OPO Eye Bank, The Third Affiliated Hospital of Hebei Medical University, Shijiazhuang, China
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9
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Wehrman RF, Genschel U, Charli A, Kanthasamy AG, Allbaugh RA, Ben-Shlomo G. Interleukin-6 and lactate dehydrogenase expression in a novel ex vivo rocking model of equine corneal epithelial wound healing. Vet Ophthalmol 2021; 24:509-519. [PMID: 34553825 DOI: 10.1111/vop.12935] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2020] [Revised: 06/25/2021] [Accepted: 09/05/2021] [Indexed: 11/27/2022]
Abstract
PURPOSE To establish a physiologically relevant ex vivo model of equine corneal epithelial wound healing. METHODS Fourteen equine corneas were randomly assigned to one of two groups: wounded (n = 8) or unwounded (n = 6) controls. In the wounded group, the axial corneal epithelium was removed by applying a 6 mm filter paper disk soaked in 1N-NaOH for 60 s. Corneas were subsequently cultured using an air-liquid interface model. Evaluation of corneal healing was performed daily, and culture medium was collected. Corneas were randomly assigned to undergo processing via histopathology and RNAscope in situ hybridization for interleukin-6 (IL-6) and alpha-smooth muscle actin (αSMA) expression at T24, T48, and T72 h after wounding. Media of the cultured corneas were evaluated for the presence of lactate dehydrogenase (LDH) by a colorimetric assay. RESULTS The ulcerated area of the wounded corneas decreased over time and all corneas healed within 72 h. Histologically, normal corneal architecture was observed including healthy epithelium (in areas other than the ulcerated ones), minimal stromal edema, intact endothelium, and Descemet's membrane. IL-6 expression was increased in wounded corneas compared with unwounded controls. LDH expression was elevated for both wounded and unwounded corneas at T24 but decreased substantially and was not detected at T48 in media from wounded and unwounded corneas, respectively. No αSMA expression was detected from either wounded or unwounded corneas. CONCLUSIONS The equine air-liquid interface, ex vivo, corneal epithelial wound healing model is effective and physiologically relevant. This model can be used in future studies evaluating various corneal therapies.
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Affiliation(s)
- Rita Fay Wehrman
- Department of Veterinary Clinical Sciences, College of Veterinary Medicine, Iowa State University, Ames, Iowa, USA
| | - Ulrike Genschel
- Department of Statistics, College of Liberal Arts and Sciences, Iowa State University, Ames, Iowa, USA
| | - Adhithiya Charli
- Department of Biomedical Sciences, College of Veterinary Medicine, Iowa State University, Ames, Iowa, USA
| | - Anumantha G Kanthasamy
- Department of Biomedical Sciences, College of Veterinary Medicine, Iowa State University, Ames, Iowa, USA
| | - Rachel Anne Allbaugh
- Department of Veterinary Clinical Sciences, College of Veterinary Medicine, Iowa State University, Ames, Iowa, USA
| | - Gil Ben-Shlomo
- Department of Veterinary Clinical Sciences, College of Veterinary Medicine, Iowa State University, Ames, Iowa, USA.,Department of Biomedical Sciences, College of Veterinary Medicine, Iowa State University, Ames, Iowa, USA.,Department of Clinical Sciences, College of Veterinary Medicine, Cornell University, Ithaca, New York, USA
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10
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Capistrano da Silva E, Carossino M, Smith-Fleming KM, Langohr IM, Martins BDC. Determining the efficacy of the bovine amniotic membrane homogenate during the healing process in rabbits' ex vivo corneas. Vet Ophthalmol 2021; 24:380-390. [PMID: 34402564 DOI: 10.1111/vop.12917] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2020] [Revised: 06/06/2021] [Accepted: 06/18/2021] [Indexed: 11/28/2022]
Abstract
OBJECTIVE To evaluate the efficacy of bovine amniotic membrane homogenate (BAMH) on wounded ex vivo rabbit corneas. PROCEDURE Eighteen corneas obtained from normal rabbit eyes were wounded equally using a 6 mm trephine and cultured into an air-liquid interface model. Corneas were treated with phosphate-buffered saline (PBS) (n = 6, control group), 0.2% ethylenediaminetetraacetic acid (EDTA; n = 6), or BAMH (n = 6). All treatments were applied topically 6 times/day. Each cornea was macrophotographed daily with and without fluorescein stain to assess epithelialization and haziness. After 7 days, corneal transparency was evaluated, and the tissues prepared for histologic analysis of viability, and total and epithelial thickness. RESULTS The mean epithelialization time was 6.2 ± 0.82 days for the control group, 6.2 ± 0.75 days for the EDTA-treated group, and 5.1 ± 0.40 days for the BAMH-treated group, demonstrating a significant difference between the BAMH and the other groups. The corneas that received EDTA had better transparency compared with the other groups. Histologically, all corneas had adequate morphology and architecture after healing. Analysis of corneal and epithelial thickness revealed no significant difference among groups. CONCLUSION Bovine amniotic membrane homogenate is an effective and promising treatment for stromal and epithelial ulcers.
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Affiliation(s)
- Erotides Capistrano da Silva
- Department of Comparative Biosciences, College of Veterinary Medicine, University of Illinois Urbana-Champaign, Urbana, IL, USA
| | - Mariano Carossino
- Louisiana Animal Disease Diagnostic Laboratory, Louisiana State University, Baton Rouge, LA, USA
| | - Kathryn M Smith-Fleming
- Department of Veterinary Clinical Medicine, College of Veterinary Medicine, University of Illinois Urbana-Champaign, Urbana, IL, USA
| | - Ingeborg M Langohr
- Department of Pathobiological Sciences, Louisiana State University, Baton Rouge, LA, USA
| | - Bianca da C Martins
- Department of Comparative Biosciences, College of Veterinary Medicine, University of Illinois Urbana-Champaign, Urbana, IL, USA.,Department of Veterinary Clinical Medicine, College of Veterinary Medicine, University of Illinois Urbana-Champaign, Urbana, IL, USA
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11
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Baturina GS, Katkova LE, Palchikova IG, Kolosova NG, Solenov EI, Iskakov IA. Mitochondrial Antioxidant SkQ1 Improves Hypothermic Preservation of the Cornea. BIOCHEMISTRY (MOSCOW) 2021; 86:382-388. [PMID: 33838637 DOI: 10.1134/s0006297921030135] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
Diseases of the cornea are a frequent cause of blindness worldwide. Keratoplasty is an efficient method for treating severely damaged cornea. The functional competence of corneal endothelial cells is crucial for successful grafting, which requires improving the media for the hypothermic cornea preservation, as well as developing the methods for the evaluation of the corneal functional properties. The transport of water and ions by the corneal endothelium is important for the viability and optic properties of the cornea. We studied the impact of SkQ1 on the equilibrium sodium concentration in the endothelial cells after hypothermic preservation of pig cornea at 4°C for 1, 5, and 10 days in standard Eusol-C solution. The intracellular sodium concentration in the endothelial cells was assayed using the fluorescent dye Sodium Green; the images were analyzed with the custom-designed CytoDynamics computer program. The concentrations of sodium in the pig corneal endothelium significantly increased after 10 days of hypothermic preservation, while addition of 1.0 nM SkQ1 to the preservation medium decreased the equilibrium concentration of intracellular sodium (at 37°C). After 10 days of hypothermic preservation, the permeability of the plasma membrane for sodium decreased in the control cells, but not in the cells preserved in the presence of 1 nM SkQ1. Therefore, SkQ1 increased the ability of endothelial cells to restore the intracellular sodium concentration, which makes SkQ1 a promising agent for facilitating retention of the functional competence of endothelial cells during cold preservation.
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Affiliation(s)
- Galina S Baturina
- Institute of Cytology and Genetics, Siberian Branch of Russian Academy of Sciences, Novosibirsk, 630090, Russia.,Novosibirsk State University, Novosibirsk, 630090, Russia
| | - Lubov E Katkova
- Institute of Cytology and Genetics, Siberian Branch of Russian Academy of Sciences, Novosibirsk, 630090, Russia
| | - Irina G Palchikova
- Novosibirsk State University, Novosibirsk, 630090, Russia.,Technological Design Institute of Scientific Instrument Engineering, Siberian Branch of the Russian Academy of Sciences, Novosibirsk, 630058, Russia
| | - Nataliya G Kolosova
- Institute of Cytology and Genetics, Siberian Branch of Russian Academy of Sciences, Novosibirsk, 630090, Russia
| | - Evgeniy I Solenov
- Institute of Cytology and Genetics, Siberian Branch of Russian Academy of Sciences, Novosibirsk, 630090, Russia. .,Novosibirsk State University, Novosibirsk, 630090, Russia.,Novosibirsk State Technical University, Novosibirsk, 630087, Russia
| | - Igor A Iskakov
- Fyodorov Eye Microsurgery Complex, Novosibirsk, 630096, Russia
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12
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Feldt J, Welss J, Schneider U, Paulsen F. Gold-based blood serum treatment promotes wound closure of corneal epithelial cell defects in primary in vitro experiments. Ann Anat 2021; 237:151745. [PMID: 33905809 DOI: 10.1016/j.aanat.2021.151745] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2021] [Revised: 03/29/2021] [Accepted: 03/30/2021] [Indexed: 11/16/2022]
Abstract
BACKGROUND Wound healing disorders characterised by impaired or delayed reepithelialisation are a serious medical problem. In the present study, we show that gold-based blood serum therapy is a suitable therapeutic approach and shows a supportive effect in wound closure of human corneal epithelial cells (HCE) in primary in vitro experiments. METHODS For this purpose, blood from healthy individuals was incubated without (S.Ctrl) or with gold-microparticles (S.Therapy) for 24 h. Prior to human epithelial cell stimulation (HCE), the gold particles were removed and the serum was diluted in DMEM (10 % or 30 %). Both groups of serum were compared after injury. HCE were cultured and injured (corneal in vitro wound model) and then stimulated with S.Ctrl or S. THERAPY RESULTS Treatment with serum from a gold-based serum therapy (S.Therapy) shows a supportive effect on wound healing in HCE cells in vitro. In addition, gold therapy supports the secretion of important cytokines normally associated with ocular surface wound healing (IL-1β, IL-6, TNF-α and TGF-β) in HCE cells. CONCLUSIONS Therapy with gold-based blood serum significantly promotes the secretion and expression of cytokines and growth factors in HCE cells in vitro. Further preclinical experiments are necessary to demonstrate the influence of this therapy on HCE cells for possible clinical application on the human ocular surface and to prove its function also in poorly healing corneal lesions.
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Affiliation(s)
- Jessica Feldt
- Institute of Functional and Clinical Anatomy, Friedrich Alexander University Erlangen-Nürnberg, Erlangen, Germany.
| | - Jessica Welss
- Institute of Functional and Clinical Anatomy, Friedrich Alexander University Erlangen-Nürnberg, Erlangen, Germany
| | | | - Friedrich Paulsen
- Institute of Functional and Clinical Anatomy, Friedrich Alexander University Erlangen-Nürnberg, Erlangen, Germany; Sechenov University, Department of Operative Surgery and Topographic Anatomy, Moscow, Russia
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13
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Wang LY, Zhang YT, Du LQ, Wu XY, Zhu J. The Effect of SPARC on the Proliferation and Migration of Limbal Epithelial Stem Cells During the Corneal Epithelial Wound Healing. Stem Cells Dev 2021; 30:301-308. [PMID: 33487117 DOI: 10.1089/scd.2020.0196] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Secreted protein acidic and rich in cysteine (SPARC) shows a specific colocalization with limbal epithelial stem cells (LESCs) in vivo; however, the inherent relationship between SPARC and LESCs is still unclear. This study investigated the effects of SPARC on the maintenance of LESC stemness and corneal wound healing. To test the influence of different concentration of exogenous SPARC on the proliferation of LESCs, cell counting kit-8 assay and 5-ethynyl-2'-deoxyuridine staining were performed and the results indicated that 1 μg/mL SPARC was the optimum concentration for enhanced LESC proliferation. Compared with a control group, SPARC-treated group showed a higher expression of LESC-positive markers p63α, ABCG-2, and Bmi-1, and a lower level of differentiation marker cytokeratin-3 (CK3), thereby suggesting that SPARC could maintain LESC characteristic phenotype and suppress spontaneous epithelial differentiation in vitro. In vivo, exogenous SPARC accelerated the wound-healing process by both the enhancement of LESC proliferation and promoting the migration of the proliferating cells. However, the intact epithelium impaired this function of SPARC by contact inhibition.
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Affiliation(s)
- Le-Yi Wang
- Department of Ophthalmology, Cheeloo College of Medicine, Qilu Hospital, Shandong University, Jinan, P.R. China
| | - Yu-Ting Zhang
- Department of Ophthalmology, Cheeloo College of Medicine, Qilu Hospital, Shandong University, Jinan, P.R. China
| | - Li-Qun Du
- Department of Ophthalmology, Cheeloo College of Medicine, Qilu Hospital, Shandong University, Jinan, P.R. China
| | - Xin-Yi Wu
- Department of Ophthalmology, Cheeloo College of Medicine, Qilu Hospital, Shandong University, Jinan, P.R. China
| | - Jing Zhu
- Department of Ophthalmology, Cheeloo College of Medicine, Qilu Hospital, Shandong University, Jinan, P.R. China.,The Key Laboratory of Cardiovascular Remodeling and Function Research, The State and Shandong Province Joint Key Laboratory of Translational Cardiovascular Medicine, Chinese Ministry of Education, Chinese National Health Commission and Chinese Academy of Medical Sciences, Qilu Hospital, Shandong University, Jinan, China
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14
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Portela ALBM, Moreno RN, Ribeiro MHML, de Andrade FM, Alves YV, Alves M, Lira RPC. Role of nicergoline in corneal wound healing in diabetic rats. BMC Ophthalmol 2021; 21:77. [PMID: 33563243 PMCID: PMC7871528 DOI: 10.1186/s12886-021-01835-4] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2020] [Accepted: 01/12/2021] [Indexed: 01/10/2023] Open
Abstract
Background To investigate the effect of nicergoline on the rate of complete corneal ulcer reepithelialization (CCUR) in diabetic rats with diabetic keratopathy. Methods Forty-eight streptozotocin-induced diabetic rats were randomly divided into two groups. The experimental group (n = 24) received nicergoline (10 mg.kg− 1.day− 1), while the control group (n = 24) received a placebo. A corneal epithelial defect was induced using a corneal diamond burr, and defect area was compared at time points of 0, 12, 24, 48 and 72 h after the injury using image analysis software. The probability of CCUR within 72 h was assessed using the Kaplan–Meier survival analysis log-rank test. Results When compared, 4 of the 24 rats (17%) in the placebo group and 12 of the 24 rats (50%) in the nicergoline group were found to have CCUR within 72 h (log-rank = 0.027). Cox regression analysis found no effect of the covariates blood glucose (P = 0.601) or weight (P = 0.322) on the corneal reepithelialization (survival) curve. Conclusions Nicergoline increased wound healing rates relative to placebo and may therefore be investigated as a treatment option in diabetic keratopathy.
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Affiliation(s)
| | | | | | | | - Yale Viana Alves
- Federal University of Campina Grande (UFCG), Campina Grande, Paraíba, Brazil
| | - Mônica Alves
- University of Campinas (UNICAMP), Campinas, São Paulo, Brazil
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15
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Yasami-Khiabani S, Karkhaneh A, Shokrgozar MA, Amanzadeh A, Golkar M. Size effect of human epidermal growth factor-conjugated polystyrene particles on cell proliferation. Biomater Sci 2020; 8:4832-4840. [PMID: 32760979 DOI: 10.1039/d0bm00183j] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Conjugation of growth factors to a carrier is a favorable method to improve their efficacy as therapeutic molecules. Here, we report the carrier size effect on bioactivity of human epidermal growth factor (hEGF) conjugated to polystyrene particles. BALB/3T3 cells were treated with hEGF-conjugated particles (hEGF-conjs) sized from 20 to 1000 nm. At hEGF concentrations less than 0.5 ng ml-1, free hEGF was more potent than the hEGF-conjs at inducing cell proliferation. However, cell proliferation was size-dependent at higher concentrations of hEGF i.e. hEGF-conjs sized equal to or less than 200 nm displayed lower cell proliferation, compared to free hEGF, but larger particles showed increased cell proliferation. This is in agreement with previous studies showing accumulation of activated-EGFRs in early endosomes triggers apoptosis of A431 and HeLa cells. The confocal microscopy and co-localization fluorescence staining showed the 500 and 1000 nm hEGF-conjs exclusively remained on the cell surface, probably enabling them to activate EGF receptors for a longer time. Conversely, smaller particles were mostly inside the cells, indicating their rapid endocytosis. Similarly, A431 cells treated with 20 nm hEGF-conj, endocytosed the particles and experienced decreased cell proliferation, while the 500 and 1000 nm hEGF-conjs were not internalized, and induced partial cell proliferation. Moreover, we showed multivalency of hEGF-conjs is not the cause of enhanced cell proliferation by large particles, as the degree of EGFR phosphorylation by free EGF was higher, compared to hEGF-conjs. Our results suggest the potential of micron-sized particles as a carrier for hEGF to enhance cell proliferation, which could be explored as a promising approach for topical application of growth factors for accelerating wound healing.
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Affiliation(s)
- Setayesh Yasami-Khiabani
- Department of Biomedical Engineering, Amirkabir University of Technology (Tehran Polytechnic), Tehran, Iran.
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16
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Cao Q, Xu W, Chen W, Peng D, Liu Q, Dong J, Reinach PS, Yan D. MicroRNA-184 negatively regulates corneal epithelial wound healing via targeting CDC25A, CARM1, and LASP1. EYE AND VISION 2020; 7:35. [PMID: 32766356 PMCID: PMC7395415 DOI: 10.1186/s40662-020-00202-6] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/28/2020] [Accepted: 06/15/2020] [Indexed: 11/10/2022]
Abstract
Background MicroRNAs (miRNAs) play critical roles in corneal development and functional homeostasis. Our previous study identified miR-184 as one of the most highly expressed miRNAs in the corneal epithelium. Even though its expression level plummeted dramatically during corneal epithelial wound healing (CEWH), its precise role in mediating corneal epithelial renewal was unresolved. The present study aimed to reveal the function and mechanism of miR-184 in regulating CEWH. Methods Quantitative RT-PCR analysis characterized the miR-184 expression pattern during CEWH in mice. Ectopic miR-184 injection determined its effect on this process in vivo. We evaluated the effects of miR-184 and its target genes on the proliferation, cell cycle, and migration of human corneal epithelial cells (HCECs) using MTS, flow cytometry, and wound-healing assay, respectively. Bioinformatic analysis, in conjunction with gene microarray analysis and cell-based luciferase assays, pinpointed gene targets of miR-184 contributing to CEWH. Results MiR-184 underwent marked downregulation during mouse CEWH. Ectopic miR-184 overexpression delayed this process in mice. Furthermore, miR-184 transfection into HCECs significantly inhibited cell proliferation, cell cycle progression, and cell migration. MiR-184 directly targeted CDC25A, CARM1, and LASP1, and downregulated their expression in HCECs. CARM1 downregulation inhibited both HCEC proliferation and migration, whereas a decrease in LASP1 gene expression only inhibited migration. Conclusions Our results demonstrate that miR-184 inhibits corneal epithelial cell proliferation and migration via targeting CDC25A, CARM1, and LASP1, suggesting it acts as a negative modulator during CEWH. Therefore, identifying strategies to suppress miR-184 expression levels has the potential to promote CEWH.
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Affiliation(s)
- Qiongjie Cao
- School of Ophthalmology and Optometry, Eye Hospital, Wenzhou Medical University, 270 Xueyuan Road, Wenzhou, 325027 Zhejiang China.,State Key Laboratory of Ophthalmology, Optometry and Visual Science, Wenzhou, Zhejiang China
| | - Weiwei Xu
- School of Ophthalmology and Optometry, Eye Hospital, Wenzhou Medical University, 270 Xueyuan Road, Wenzhou, 325027 Zhejiang China.,State Key Laboratory of Ophthalmology, Optometry and Visual Science, Wenzhou, Zhejiang China
| | - Weiwei Chen
- School of Ophthalmology and Optometry, Eye Hospital, Wenzhou Medical University, 270 Xueyuan Road, Wenzhou, 325027 Zhejiang China.,State Key Laboratory of Ophthalmology, Optometry and Visual Science, Wenzhou, Zhejiang China
| | - Dewei Peng
- School of Ophthalmology and Optometry, Eye Hospital, Wenzhou Medical University, 270 Xueyuan Road, Wenzhou, 325027 Zhejiang China.,State Key Laboratory of Ophthalmology, Optometry and Visual Science, Wenzhou, Zhejiang China
| | - Qi Liu
- School of Ophthalmology and Optometry, Eye Hospital, Wenzhou Medical University, 270 Xueyuan Road, Wenzhou, 325027 Zhejiang China.,State Key Laboratory of Ophthalmology, Optometry and Visual Science, Wenzhou, Zhejiang China
| | - Jing Dong
- School of Ophthalmology and Optometry, Eye Hospital, Wenzhou Medical University, 270 Xueyuan Road, Wenzhou, 325027 Zhejiang China.,State Key Laboratory of Ophthalmology, Optometry and Visual Science, Wenzhou, Zhejiang China
| | - Peter S Reinach
- School of Ophthalmology and Optometry, Eye Hospital, Wenzhou Medical University, 270 Xueyuan Road, Wenzhou, 325027 Zhejiang China.,State Key Laboratory of Ophthalmology, Optometry and Visual Science, Wenzhou, Zhejiang China
| | - Dongsheng Yan
- School of Ophthalmology and Optometry, Eye Hospital, Wenzhou Medical University, 270 Xueyuan Road, Wenzhou, 325027 Zhejiang China.,State Key Laboratory of Ophthalmology, Optometry and Visual Science, Wenzhou, Zhejiang China
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17
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Gross C, Belville C, Lavergne M, Choltus H, Jabaudon M, Blondonnet R, Constantin JM, Chiambaretta F, Blanchon L, Sapin V. Advanced Glycation End Products and Receptor (RAGE) Promote Wound Healing of Human Corneal Epithelial Cells. Invest Ophthalmol Vis Sci 2020; 61:14. [PMID: 32176265 PMCID: PMC7401750 DOI: 10.1167/iovs.61.3.14] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
Abstract
Purpose We used a human corneal epithelial cell (HCE) line to determine the involvement of the advanced glycation end products (AGEs) / receptor for AGEs (RAGE) couple in corneal epithelium wound healing. Methods After wounding, HCE cells were exposed to two major RAGE ligands (HMGB1 and AGEs), and wound healing was evaluated using the in vitro scratch assay. Following wound healing, the HCE cells were used to study the influence of the RAGE ligands on HCE proliferation, invasion, and migration. Activation of the nuclear factor (NF)-κB signaling pathway by the AGEs/RAGE couple was tested using a luciferase reporter assay. Functional transcriptional regulation by this pathway was confirmed by quantification of expression of the connexin 43 target gene. For each experiment, specific RAGE involvement was confirmed by small interfering RNA treatments. Results AGEs treatment at a dose of 100 µg/mL significantly improved the wound healing process in a RAGE-dependent manner by promoting cell migration, whereas HMGB1 had no effect. No significant influence of the AGEs/RAGE couple was observed on cell proliferation and invasion. However, this treatment induced an early activation of the NF-κB pathway and positively regulated the expression of the target gene, connexin 43, at both the mRNA and protein levels. Conclusions Our results demonstrate that the RAGE pathway is activated by AGEs treatment and is involved in the promotion of corneal epithelial wound healing. This positive action is observed only during the early stages of wound healing, as illustrated by the quick activation of the NF-κB pathway and induction of connexin 43 expression.
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18
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Kafarnik C, McClellan A, Dziasko M, Daniels JT, Guest DJ. Canine Corneal Stromal Cells Have Multipotent Mesenchymal Stromal Cell Properties In Vitro. Stem Cells Dev 2020; 29:425-439. [PMID: 31973649 DOI: 10.1089/scd.2019.0163] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
The objective of this study was to determine whether corneal stromal cells (CSCs) from the limbal and central corneal stroma in dogs have multipotent mesenchymal stem/stromal cell (MSC) properties, and whether this cell population can be differentiated into keratocyte-like cells (KDCs). Normal, donated, mesocephalic dog corneas were used to isolate CSC in vitro. Immunohistochemistry demonstrated a distinct population of CD90 expressing cells in the anterior stroma throughout the limbal and central cornea. CSC could be cultured from both the limbal and central cornea and the culture kinetics showed a progenitor cell profile. The CSC expressed stem cell markers CD90, CD73, CD105, N-cadherin, and Pax6, while CD34 was negative. Limbal and central CSC differentiated into osteoblasts, chondrocytes, and adipocytes confirming their multipotency. Coculturing allogeneic peripheral blood mononuclear cells (PBMCs) with limbal CSCs did not affect baseline PBMC proliferation indicating a degree of innate immune privilege. Limbal CSC could be differentiated into KDCs that expressed Keratocan, Lumican, and ALDH1A3 and downregulated Pax6 and N-cadherin. In conclusion, canine CSCs have multipotent MSC properties similarly described in humans and could serve as a source of cells for cell therapy and studying corneal diseases.
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Affiliation(s)
- Christiane Kafarnik
- Centre for Preventive Medicine, Animal Health Trust, Newmarket, United Kingdom.,Rescue, Repair and Regeneration Theme, Institute of Ophthalmology, University College London, London, United Kingdom
| | - Alyce McClellan
- Centre for Preventive Medicine, Animal Health Trust, Newmarket, United Kingdom
| | - Marc Dziasko
- Rescue, Repair and Regeneration Theme, Institute of Ophthalmology, University College London, London, United Kingdom
| | - Julie T Daniels
- Rescue, Repair and Regeneration Theme, Institute of Ophthalmology, University College London, London, United Kingdom
| | - Deborah J Guest
- Centre for Preventive Medicine, Animal Health Trust, Newmarket, United Kingdom
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19
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Di Zazzo A, Lee SM, Sung J, Niutta M, Coassin M, Mashaghi A, Inomata T. Variable Responses to Corneal Grafts: Insights from Immunology and Systems Biology. J Clin Med 2020; 9:E586. [PMID: 32098130 PMCID: PMC7074162 DOI: 10.3390/jcm9020586] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2019] [Accepted: 02/18/2020] [Indexed: 12/13/2022] Open
Abstract
Corneal grafts interact with their hosts via complex immunobiological processes that sometimes lead to graft failure. Prediction of graft failure is often a tedious task due to the genetic and nongenetic heterogeneity of patients. As in other areas of medicine, a reliable prediction method would impact therapeutic decision-making in corneal transplantation. Valuable insights into the clinically observed heterogeneity of host responses to corneal grafts have emerged from multidisciplinary approaches, including genomics analyses, mechanical studies, immunobiology, and theoretical modeling. Here, we review the emerging concepts, tools, and new biomarkers that may allow for the prediction of graft survival.
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Affiliation(s)
- Antonio Di Zazzo
- Ophthalmology Complex Operative Unit, Campus Bio Medico University, 00128 Rome, Italy; (A.D.Z.); (M.N.); (M.C.)
| | - Sang-Mok Lee
- Department of Ophthalmology, Catholic Kwandong University College of Medicine, Gangneung-si, Gangwon-do 25601, Korea;
- Department of Cornea, External Disease & Refractive Surgery, HanGil Eye Hospital, Incheon 21388, Korea
| | - Jaemyoung Sung
- University of South Florida, Morsani College of Medicine, Tampa, FL 33612, USA;
- Department of Ophthalmology, Juntendo University Faculty of Medicine, Tokyo 1130033, Japan
| | - Matteo Niutta
- Ophthalmology Complex Operative Unit, Campus Bio Medico University, 00128 Rome, Italy; (A.D.Z.); (M.N.); (M.C.)
| | - Marco Coassin
- Ophthalmology Complex Operative Unit, Campus Bio Medico University, 00128 Rome, Italy; (A.D.Z.); (M.N.); (M.C.)
| | - Alireza Mashaghi
- Systems Biomedicine and Pharmacology Division, Leiden Academic Centre for Drug Research, Leiden University, 2333CC Leiden, The Netherlands
| | - Takenori Inomata
- Department of Ophthalmology, Juntendo University Faculty of Medicine, Tokyo 1130033, Japan
- Department of Strategic Operating Room Management and Improvement, Juntendo University Faculty of Medicine, Tokyo 1130033, Japan
- Department of Hospital Administration, Juntendo University Faculty of Medicine, Tokyo 1130033, Japan
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20
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Exploring the Key Genes and Pathways in the Formation of Corneal Scar Using Bioinformatics Analysis. BIOMED RESEARCH INTERNATIONAL 2020; 2020:6247489. [PMID: 32016117 PMCID: PMC6994212 DOI: 10.1155/2020/6247489] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/12/2019] [Revised: 07/19/2019] [Accepted: 08/14/2019] [Indexed: 12/27/2022]
Abstract
The Corneal wound healing results in the formation of opaque corneal scar. In fact, millions of people around the world suffer from corneal scars, leading to loss of vision. This study aimed to identify the key changes of gene expression in the formation of opaque corneal scar and provided potential biomarker candidates for clinical treatment and drug target discovery. We downloaded Gene expression dataset GSE6676 from NCBI-GEO, and analyzed the Differentially Expressed Genes (DEGs), Gene Ontology (GO), Kyoto Encyclopedia of Genes and Genomes (KEGG) enrichment pathway analyses, and protein-protein interaction (PPI) network. A total of 1377 differentially expressed genes were identified and the result of Functional enrichment analysis, Kyoto Encyclopedia of Genes and Genomes (KEGG) identification and protein-protein interaction (PPI) networks were performed. In total, 7 hub genes IL6 (interleukin-6), MMP9 (matrix metallopeptidase 9), CXCL10 (C-X-C motif chemokine ligand 10), MAPK8 (mitogen-activated protein kinase 8), TLR4 (toll-like receptor 4), HGF (hepatocyte growth factor), EDN1 (endothelin 1) were selected. In conclusion, the DEGS, Hub genes and signal pathways identified in this study can help us understand the molecular mechanism of corneal scar formation and provide candidate targets for the diagnosis and treatment of corneal scar.
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21
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Pakshir K, Badali H, Nami S, Mirzaei H, Ebrahimzadeh V, Morovati H. Interactions between immune response to fungal infection and microRNAs: The pioneer tuners. Mycoses 2019; 63:4-20. [PMID: 31597205 DOI: 10.1111/myc.13017] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2019] [Revised: 10/03/2019] [Accepted: 10/04/2019] [Indexed: 12/12/2022]
Abstract
Due to their physiological and biological characteristics, numerous fungi are potentially emerging pathogens. Active dynamicity of fungal pathogens causes life-threatening infections annually impose high costs to the health systems. Although immune responses play crucial roles in controlling the fate of fungal infections, immunocompromised patients are at high risk with high mortality. Tuning the immune response against fungal infections might be an effective strategy for controlling and reducing the pathological damages. MicroRNAs (miRNAs) are known as the master regulators of immune response. These single-stranded tuners (18-23 bp non-coding RNAs) are endogenously expressed by all metazoan eukaryotes and have emerged as the master gene expression controllers of at least 30% human genes. In this review article, following the review of biology and physiology (biogenesis and mechanism of actions) of miRNAs and immune response against fungal infections, the interactions between them were scrutinised. In conclusion, miRNAs might be considered as one of the potential goals in immunotherapy for fungal infections. Undoubtedly, advanced studies in this field, further identifying of miRNA roles in governing the immune response, pave the way for inclusion of miRNA-related immunotherapeutic in the treatment of life-threatening fungal infections.
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Affiliation(s)
- Keyvan Pakshir
- Department of Parasitology and Mycology, School of Medicine, Shiraz University of Medical Sciences, Shiraz, Iran
| | - Hamid Badali
- Invasive Fungi Research Center, School of Medicine, Mazandaran University of Medical Sciences, Sari, Iran.,Fungus Testing Laboratory, Department of Pathology and Laboratory Medicine, University of Texas Health Science Center at San Antonio, San Antonio, TX, USA
| | - Sanam Nami
- Department of Medical Mycology and Parasitology, School of Medicine, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Hamed Mirzaei
- Research Center for Biochemistry and Nutrition in Metabolic Diseases, Kashan University of Medical Sciences, Kashan, Iran
| | - Veghar Ebrahimzadeh
- Immunology Research Center, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Hamid Morovati
- Department of Medical Mycology and Parasitology, School of Medicine, Tabriz University of Medical Sciences, Tabriz, Iran.,Immunology Research Center, Tabriz University of Medical Sciences, Tabriz, Iran
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22
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Pterygium Pathology: A Prospective Case-Control Study on Tear Film Cytokine Levels. Mediators Inflamm 2019; 2019:9416262. [PMID: 31780873 PMCID: PMC6875004 DOI: 10.1155/2019/9416262] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2019] [Accepted: 09/05/2019] [Indexed: 12/31/2022] Open
Abstract
Pterygium is a common eye disease, linked to an increased exposure to UV radiation and dry environments. The associated pathology culminates in visual impairment and, in some rare cases, blindness. However, there remains a lot of uncertainty concerning the pathogenesis of this fibrovascular lesion. As the composition of the tear film provides a reflection into the pathological changes at the ocular surface, tear analysis represents an ideal approach to gain insight in the progression of disease following pterygiectomy. This study enrolled 19 patients and age/gender-matched healthy controls. Tear film levels of interleukin- (IL-) 6, IL-8, and vascular endothelial growth factor (VEGF) were investigated over time, and preoperative concentrations were linked to corneal neovascularization and pterygium size. Diminished tear film levels were found in unilateral patients who show no clinical signs of pterygium recurrence over a period of one year. Hence, our results highlight the potential of using the course of IL-6, IL-8, and VEGF levels in tears as biomarkers for recovery. In addition, when focusing on the affected eyes (i.e., primary and recurrent pterygium), we detected fold changes in preoperative cytokine concentrations to correspond with disease severity. As our proposed biomarkers did not reveal a linear relationship with corneal neovascularization nor the invasive behaviour of pterygium, no exact role in the pterygium pathology could be established. Hence, our data point to these factors being contributors rather than decisive players in the pathological processes.
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23
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Petrov SY, Antonov AA, Avetisov KS, Volzhanin AV, Agadzhanyan TM, Aslamazova AE. [Refractive shift after glaucoma surgery]. Vestn Oftalmol 2019; 135:278-285. [PMID: 31691673 DOI: 10.17116/oftalma2019135052278] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Filtering glaucoma surgery can affect certain biometric features of the eye: it can change the axial length and anterior chamber depth, while redistribution of mechanical tensions in the fibrous tunic can alter the shape of the cornea. Among these changes that affect refraction, reshaping of corneal curvature is the principle one. Contrary to the expectations, and in contrast to changes associated with cataract surgery, glaucoma surgery led to decrease in vertical corneal radius (steepening) and development of the with-the-rule astigmatism. A number of studies helped reveal the features of corneal astigmatism that appears after glaucoma surgery: its power, duration, possibility of horizontal meridian flattening, influence of topical cytostatic drugs and drainage devices, etc. Potential reasons of astigmatism development were suggested: conjunctival incisions and sutures in the limbal area, quantity and strength of flap sutures, intraocular pressure level, shift of fistula edges, tissue contraction after cauterization, etc. The key role in pathogenesis of the refractive shift due to change of corneal curvature may belong to particularities of wound healing in the cornea and sclera: healing in sclera is similar to one of connective tissue - its ultrastructure undergoes aging process followed by change of rigidity. At the same time, the main reason for the development of corneal astigmatism after glaucoma surgery remains unclear.
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Affiliation(s)
- S Yu Petrov
- Research Institute of Eye Diseases, 11A Rossolimo St., Moscow, Russian Federation, 119021
| | - A A Antonov
- Research Institute of Eye Diseases, 11A Rossolimo St., Moscow, Russian Federation, 119021
| | - K S Avetisov
- Research Institute of Eye Diseases, 11A Rossolimo St., Moscow, Russian Federation, 119021
| | - A V Volzhanin
- Research Institute of Eye Diseases, 11A Rossolimo St., Moscow, Russian Federation, 119021
| | - T M Agadzhanyan
- Research Institute of Eye Diseases, 11A Rossolimo St., Moscow, Russian Federation, 119021
| | - A E Aslamazova
- I.M. Sechenov First Moscow State Medical University, 8-2 Trubetskaya St., Moscow, Russian Federation, 119991
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24
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Krüger K, Schmid S, Paulsen F, Ignatius A, Klinger P, Hotfiel T, Swoboda B, Gelse K. Trefoil Factor 3 (TFF3) Is Involved in Cell Migration for Skeletal Repair. Int J Mol Sci 2019; 20:ijms20174277. [PMID: 31480518 PMCID: PMC6747154 DOI: 10.3390/ijms20174277] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2019] [Revised: 08/28/2019] [Accepted: 08/29/2019] [Indexed: 12/25/2022] Open
Abstract
The aim of the study was to explore the possible role of Trefoil Factor Family peptide 3 (TFF3) for skeletal repair. The expression of TFF3 was analyzed in human joint tissues as well as in a murine bone fracture model. Serum levels of TFF3 following a defined skeletal trauma in humans were determined by ELISA. The mRNA expression of TFF3 was analyzed under normoxia and hypoxia. Expression analysis after stimulation of human mesenchymal progenitor cells (MPCs) with TFF3 was performed by RT2 Profiler PCR Array. The effect of recombinant human (rh)TFF3 on MPCs was analysed by different migration and chemotaxis assays. The effect on cell motility was also visualized by fluorescence staining of F-Actin. TFF3 was absent in human articular cartilage, but strongly expressed in the subchondral bone and periosteum of adult joints. Strong TFF3 immunoreactivity was also detected in murine fracture callus. Serum levels of TFF3 were significantly increased after skeletal trauma in humans. Expression analysis demonstrated that rhTFF3 significantly decreased mRNA of ROCK1. Wound healing assays showed increased cell migration of MPCs by rhTFF3. The F-Actin cytoskeleton was markedly influenced by rhTFF3. Cell proliferation was not increased by rhTFF3. The data demonstrate elevated expression of TFF3 after skeletal trauma. The stimulatory effects on cell motility and migration of MPCs suggest a role of TFF3 in skeletal repair.
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Affiliation(s)
- Katharina Krüger
- Department of Orthopaedic Trauma Surgery, University Hospital Erlangen, 91054 Erlangen, Germany
| | - Sebastian Schmid
- Department of Orthopaedic Trauma Surgery, University Hospital Erlangen, 91054 Erlangen, Germany
- Institute of Functional and Clinical Anatomy, University of Erlangen-Nuernberg, 91054 Erlangen, Germany
| | - Friedrich Paulsen
- Institute of Functional and Clinical Anatomy, University of Erlangen-Nuernberg, 91054 Erlangen, Germany
| | - Anita Ignatius
- Institute of Orthopaedic Research and Biomechanics, University of Ulm, 89081 Ulm, Germany
| | - Patricia Klinger
- Department of Orthopaedic Trauma Surgery, University Hospital Erlangen, 91054 Erlangen, Germany
- Institute of Functional and Clinical Anatomy, University of Erlangen-Nuernberg, 91054 Erlangen, Germany
| | - Thilo Hotfiel
- Division of Orthopaedic Rheumatology, Department of Orthopaedics, University of Erlangen-Nuernberg, 91054 Erlangen, Germany
| | - Bernd Swoboda
- Division of Orthopaedic Rheumatology, Department of Orthopaedics, University of Erlangen-Nuernberg, 91054 Erlangen, Germany
| | - Kolja Gelse
- Department of Orthopaedic Trauma Surgery, University Hospital Erlangen, 91054 Erlangen, Germany.
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25
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Kokuti R. Medical treatment of keratomalacia in a cat. VETERINARY RECORD CASE REPORTS 2019. [DOI: 10.1136/vetreccr-2019-000820] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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26
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Csősz É, Tóth N, Deák E, Csutak A, Tőzsér J. Wound-Healing Markers Revealed by Proximity Extension Assay in Tears of Patients following Glaucoma Surgery. Int J Mol Sci 2018; 19:ijms19124096. [PMID: 30567303 PMCID: PMC6321131 DOI: 10.3390/ijms19124096] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2018] [Revised: 11/26/2018] [Accepted: 12/11/2018] [Indexed: 02/07/2023] Open
Abstract
Tears are a constantly available and highly valuable body fluid collectable by non-invasive techniques. Although it can give information on ocular status and be used for follow-ups, tear analysis is challenging due to the low amount of sample that is available. Proximity extension assay (PEA) allows for a sensitive and scalable analysis of multiple proteins in a single run from a one-µL sample, so we applied this technique and examined the amount of 184 proteins in tears collected at different time points after trabeculectomy. The success rate of this surgical intervention highly depends on proper wound healing; therefore, information on the process is indispensable. We observed significantly higher levels of IL-6 and MMP1 at the early time points (day one, two, and four) following trabeculectomy, and the protein amounts went back to the level observed before the surgery three months after the intervention. Patients with or without complications were tested, and proteins that have roles in the immune response and wound healing could be observed with altered frequency and amounts in the cases of patients with complications. Our results highlight the importance of inflammation in wound-healing complications, and at the same time, indicate the utility of PEA in tear analysis.
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Affiliation(s)
- Éva Csősz
- Biomarker Research Group, Department of Biochemistry and Molecular Biology, Faculty of Medicine, University of Debrecen, Egyetem ter 1., 4032 Debrecen, Hungary.
- Proteomics Core Facility, Department of Biochemistry and Molecular Biology, Faculty of Medicine, University of Debrecen, Egyetem ter 1., 4032 Debrecen, Hungary.
| | - Noémi Tóth
- Department of Ophthalmology, Faculty of Medicine, University of Debrecen, Nagyerdei krt. 98., 4032 Debrecen, Hungary.
| | - Eszter Deák
- Biomarker Research Group, Department of Biochemistry and Molecular Biology, Faculty of Medicine, University of Debrecen, Egyetem ter 1., 4032 Debrecen, Hungary.
- Department of Ophthalmology, Faculty of Medicine, University of Debrecen, Nagyerdei krt. 98., 4032 Debrecen, Hungary.
| | - Adrienne Csutak
- Department of Ophthalmology, Faculty of Medicine, University of Debrecen, Nagyerdei krt. 98., 4032 Debrecen, Hungary.
| | - József Tőzsér
- Biomarker Research Group, Department of Biochemistry and Molecular Biology, Faculty of Medicine, University of Debrecen, Egyetem ter 1., 4032 Debrecen, Hungary.
- Proteomics Core Facility, Department of Biochemistry and Molecular Biology, Faculty of Medicine, University of Debrecen, Egyetem ter 1., 4032 Debrecen, Hungary.
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27
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Berkowski WM, Gibson DJ, Seo S, Proietto LR, Whitley RD, Schultz GS, Plummer CE. Assessment of Topical Therapies for Improving the Optical Clarity Following Stromal Wounding in a Novel Ex Vivo Canine Cornea Model. ACTA ACUST UNITED AC 2018; 59:5509-5521. [DOI: 10.1167/iovs.17-23085] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Affiliation(s)
- William M. Berkowski
- Department of Small Animal Clinical Sciences, University of Florida, Gainesville, Florida, United States
| | - Daniel J. Gibson
- Institute for Wound Research, University of Florida, Gainesville, Florida, United States
| | - SooJung Seo
- Institute for Wound Research, University of Florida, Gainesville, Florida, United States
| | - Laura R. Proietto
- Department of Small Animal Clinical Sciences, University of Florida, Gainesville, Florida, United States
| | - R. David Whitley
- Department of Small Animal Clinical Sciences, University of Florida, Gainesville, Florida, United States
| | - Gregory S. Schultz
- Institute for Wound Research, University of Florida, Gainesville, Florida, United States
| | - Caryn E. Plummer
- Department of Small Animal Clinical Sciences, University of Florida, Gainesville, Florida, United States
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28
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Malhotra R, Elalfy MS, Kannan R, Nduka C, Hamada S. Update on corneal neurotisation. Br J Ophthalmol 2018; 103:26-35. [DOI: 10.1136/bjophthalmol-2018-312104] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2018] [Revised: 05/22/2018] [Accepted: 08/12/2018] [Indexed: 02/03/2023]
Abstract
Corneal neurotisation describes surgical restoration of nerve growth into the cornea to restore corneal sensation and trophic function. It represents an exciting and effective emerging treatment for neurotrophic keratopathy. Techniques described to date involve either direct nerve transfer or an interpositional nerve graft coapted to a healthy donor nerve. We review the experience to date with particular emphasis on a detailed review of techniques, outcomes and current thoughts.
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Kandeel S, Balaha M. Olopatadine enhances recovery of alkali-induced corneal injury in rats. Life Sci 2018; 207:499-507. [PMID: 30056863 DOI: 10.1016/j.lfs.2018.07.002] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2018] [Revised: 06/30/2018] [Accepted: 07/02/2018] [Indexed: 02/07/2023]
Abstract
AIMS The alkali-induced corneal injury is an ocular emergency that required an immediate and effective management to preserve the normal corneal functions and transparency. Olopatadine is a fast, topically-effective anti-allergic drug, which exhibited potent anti-inflammatory and anti-angiogenic abilities in different allergic animals' models. Therefore, this study aimed to evaluate the therapeutic effect of olopatadine on alkali-induced corneal injury in rats. MATERIALS AND METHODS Corneal alkali injury (CI) induced in the right eyes of an eight-week-old male Wister rats, by application of 3 mm diameter filter-papers, soaked for 10 s in 1 N-NaOH, to the right eyes' corneal centers for 30 s, afterward, the filter paper removed, and the rat right eye rinsed with 20 ml normal saline. For treatment of CI, either 0.2% or 0.77% olopatadine applied topically daily for 14 days, starting immediately after the induction of CI. KEY FINDINGS Olopatadine, in the present work, effectively and dose-dependently enhanced the corneal healing after alkali application, with significant reduction of the corneal opacity and neovascularization scores, besides, it suppressed the augmented corneal IL-1β, VEGF, caspase-3 levels, and nuclear NF-κB immunohistochemical expression, meanwhile it abrogated the corneal histopathological changes, induced by alkali application. SIGNIFICANCE Olopatadine appears to be a potential treatment option for alkali-induced corneal injury.
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Affiliation(s)
- Samah Kandeel
- Histology Department, Faculty of Medicine, Tanta University, El-Gish Street, Postal No. 31527 Tanta, Egypt.
| | - Mohamed Balaha
- Pharmacology Department, Faculty of Medicine, Tanta University, El-Gish Street, Postal No. 31527 Tanta, Egypt
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30
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Baturina GS, Palchikova IG, Konev AA, Smirnov ES, Katkova LE, Solenov EI, Iskakov IА. STUDY OF THE EFFECT OF HYPOTHERMIC CONSERVATION ON THE INTRACELLULAR SODIUM CONCENTRATION IN THE ENDOTHELIUM OF CORNEAL TRANSPLANTS. Vavilovskii Zhurnal Genet Selektsii 2018. [DOI: 10.18699/vj18.379] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
Abstract
Endothelial keratoplasty has become the treatment of choice for corneal endothelial dysfunction. Advancements in the surgical treatment of corneal endothelial diseases depend on progress in graft conservation and its related advantages in assessing the suitability of grafts for transplantation. Transport of water and ions by cornea endothelium is important for the optic properties of cornea. In this work, we study the intracellular sodium concentration in cornea endothelial cells in samples of pig cornea that underwent hypothermic conservation for 1 and 10 days and endothelial cells of human cornea grafts after 10-day conservation. The concentration of intracellular sodium in preparations of endothelial cells was assayed using fluorescent dye SodiumGreen. The fluorescent images were analyzed with the custom-made computer program CytoDynamics. An increased level of intracellular sodium was shown in the endothelium after 10-day conservation in comparison with one-day conservation (pig samples). Sodium permeability of pig endothelial cell plasma membranes significantly decreased in these samples. Assessment of intracellular sodium in human cornea endothelium showed a higher level – as was in analogues pig samples of the corneal endothelium. The assay of the intracellular sodium balance concentration established in endothelial cells after hypothermic conservation in mediums L-15 and Optisol-GS showed a significant advantage of specialized me dium Optisol-GS. The balanced intracellular concentration after 10 days of hypothermic conservation was significantly lower in cells incubated at 4 °C in Optisol-GS (L-15, 128 ± 14, n = 15; Optisol-GS, 108 ± 14, n = 11; mM, p < 0.001). Intracellular sodium concentration could be a useful parameter for assessing cornea endothelium cell viability.
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31
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Singh A, Abd AJ, Al-Mashahedah A, Kanwar JR. Corneal Haze, Refractive Surgery, and Implications for Choroidal Neovascularization. DRUG DELIVERY FOR THE RETINA AND POSTERIOR SEGMENT DISEASE 2018:439-477. [DOI: 10.1007/978-3-319-95807-1_25] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/02/2023]
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32
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Griffith GL, Kasus-Jacobi A, Pereira HA. Bioactive Antimicrobial Peptides as Therapeutics for Corneal Wounds and Infections. Adv Wound Care (New Rochelle) 2017; 6:175-190. [PMID: 28616359 PMCID: PMC5467138 DOI: 10.1089/wound.2016.0713] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2016] [Accepted: 01/30/2017] [Indexed: 02/06/2023] Open
Abstract
Significance: More than 2 million eye injuries and infections occur each year in the United States that leave civilians and military members with reduced or complete vision loss due to the lack of effective therapeutics. Severe ocular injuries and infections occur in varied settings including the home, workplace, and battlefields. In this review, we discuss the potential of developing antimicrobial peptides (AMPs) as therapeutics for the treatment of corneal wounds and infections for which the current treatment options are inadequate. Recent Advances: Standard-of-care employs the use of fluorescein dye for the diagnosis of ocular defects and is followed by the use of antibiotics and/or steroids to treat the infection and reduce inflammation. Recent advances for treating corneal wounds include the development of amniotic membrane therapies, wound chambers, and drug-loaded hydrogels. In this review, we will discuss an innovative approach using AMPs with the dual effect of promoting corneal wound healing and clearing infections. Critical Issues: An important aspect of treating ocular injuries is that treatments need to be effective and administered expeditiously. This is especially important for injuries that occur during combat and in individuals who demonstrate delayed wound healing. To overcome gaps in current treatment modalities, bioactive peptides based on naturally occurring cationic antimicrobial proteins are being investigated as new therapeutics. Future Directions: The development of new therapeutics that can treat ocular infections and promote corneal wound healing, including the healing of persistent corneal epithelial defects, would be of great clinical benefit.
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Affiliation(s)
- Gina L. Griffith
- Ocular Trauma and Vision Restoration, United States Army Institute of Surgical Research, Fort Sam Houston, Texas
| | - Anne Kasus-Jacobi
- Department of Pharmaceutical Sciences, University of Oklahoma Health Sciences Center, Oklahoma City, Oklahoma
- Oklahoma Center for Neuroscience, University of Oklahoma Health Sciences Center Oklahoma City, Oklahoma
| | - H. Anne Pereira
- Department of Pharmaceutical Sciences, University of Oklahoma Health Sciences Center, Oklahoma City, Oklahoma
- Oklahoma Center for Neuroscience, University of Oklahoma Health Sciences Center Oklahoma City, Oklahoma
- Department of Pathology, University of Oklahoma Health Science Center, Oklahoma City, Oklahoma
- Department of Cell Biology, University of Oklahoma Health Science Center, Oklahoma City, Oklahoma
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Xeroudaki M, Peebo B, Germundsson J, Fagerholm P, Lagali N. RGTA in corneal wound healing after transepithelial laser ablation in a rabbit model: a randomized, blinded, placebo-controlled study. Acta Ophthalmol 2016; 94:685-691. [PMID: 27227481 DOI: 10.1111/aos.13116] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2015] [Accepted: 04/07/2016] [Indexed: 12/16/2022]
Abstract
PURPOSE To evaluate the efficacy of the agent RGTA for epithelial, stromal and nerve regeneration after laser-induced corneal wounding in rabbits. METHODS After excimer laser wounding of the anterior cornea in 25 New Zealand white rabbits, topical RGTA or placebo was applied in a randomized, masked manner. Fluorescein epithelial staining was performed on the first 5 postoperative days. In vivo confocal microscopy of corneal subbasal nerves and stroma was performed preoperatively and on week 2, 4, 8 and 16. At 16 weeks, corneas were stained for beta-III tubulin expression. RESULTS Postoperatively, all epithelia had closed by at least 90% after the third postoperative day. No significant difference in epithelial wound size was found between RGTA and placebo-treated groups, and RGTA did not hinder fluorescein binding. After epithelial wound closure, corneas remained transparent to 16 weeks. By confocal microscopy, subclinical stromal haze was significantly deeper in placebo-treated eyes (mean depth 60 μm) relative to RGTA group (52 μm), p = 0.02. Regenerating beta-III tubulin-positive subbasal nerves were observed in all corneas, but partial masking by haze rendered quantitative analysis unreliable. CONCLUSIONS RGTA restored stromal microarchitecture and reduced subclinical haze relative to placebo. The mild epithelial wound quickly healed regardless of treatment suggesting an optimal natural healing process in freshly wounded healthy corneas, and indicating that RGTA may be more suitable for healing of chronic or more aggressive wounds. Limitations of the rabbit model for nerve quantification in the presence of haze should also be recognized.
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Affiliation(s)
- Maria Xeroudaki
- Division of Ophthalmology; Institute for Clinical and Experimental Medicine; Faculty of Health Sciences; Linköping University; Linköping Sweden
| | - Beatrice Peebo
- Division of Ophthalmology; Institute for Clinical and Experimental Medicine; Faculty of Health Sciences; Linköping University; Linköping Sweden
| | - Johan Germundsson
- Division of Ophthalmology; Institute for Clinical and Experimental Medicine; Faculty of Health Sciences; Linköping University; Linköping Sweden
| | - Per Fagerholm
- Division of Ophthalmology; Institute for Clinical and Experimental Medicine; Faculty of Health Sciences; Linköping University; Linköping Sweden
| | - Neil Lagali
- Division of Ophthalmology; Institute for Clinical and Experimental Medicine; Faculty of Health Sciences; Linköping University; Linköping Sweden
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Guo Y, Lu X, Wang H. Downregulation of miR-18a induces CTGF and promotes proliferation and migration of sodium hyaluronate treated human corneal epithelial cells. Gene 2016; 591:129-136. [PMID: 27390086 DOI: 10.1016/j.gene.2016.07.008] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2016] [Revised: 05/12/2016] [Accepted: 07/03/2016] [Indexed: 01/18/2023]
Abstract
Properly controlled corneal epithelial wound healing is critical for health of cornea, which involves cell proliferation, migration, anchoring and differentiation. Sodium hyaluronate (SH) has been proven to exert beneficial pharmacological effect on corneal wound healing, though the underlying mechanism remained open to investigation. MicroRNAs (miRNAs) are small single-stranded RNAs that could bind to 3'UTR of mRNAs of target genes. The multi-target regulation of miRNAs may favor treatment of corneal wound given the complicated processes implicated in the healing process, which has inspired initiatives to develop miRNA therapy in corneal wound healing. In this light, we used miRNAs profiling to detect whether miRNAs are also implicated in the mechanism underlying the stimulatory effect of SH on corneal epithelial wound healing. We found miR-18a was most susceptible to SH treatment, the target prediction of which were enriched in a bunch of pathways implicated in corneal wound healing. Connective tissue growth factor (CTGF) was found to be overrepresented in most significant enriched pathways and was experimentally confirmed as a bona fide target of miR-18a, which modulated cell migration and proliferation of human corneal epithelial cells.
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Affiliation(s)
- Yingzhuo Guo
- Department of Ophthalmology, Zhujiang Hospital, Southern Medical University, Guangzhou 510280, Guangdong Province, China; Department of Ophthalmology& Optometry, Hunan Provincial People's Hospital, Changsha 410005, Hunan Province,China
| | - Xiaohe Lu
- Department of Ophthalmology, Zhujiang Hospital, Southern Medical University, Guangzhou 510280, Guangdong Province, China.
| | - Hua Wang
- Department of Ophthalmology& Optometry, Hunan Provincial People's Hospital, Changsha 410005, Hunan Province,China
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35
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Li Z, Cui L, Yang JM, Lee HS, Choi JS, Woo JM, Lim SK, Yoon KC. The Wound Healing Effects of Adiponectin Eye Drops after Corneal Alkali Burn. Curr Eye Res 2016; 41:1424-1432. [DOI: 10.3109/02713683.2015.1133834] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- Zhengri Li
- Xiamen Eye Center of Xiamen University, Xiamen, Fujian, China
- Department of Ophthalmology, Chonnam National University Medical School and Hospital and Center for Creative Biomedical Scientists at Chonnam National University, Gwangju, South Korea
| | - Lian Cui
- Department of Ophthalmology, Chonnam National University Medical School and Hospital and Center for Creative Biomedical Scientists at Chonnam National University, Gwangju, South Korea
| | - Jee Myung Yang
- Department of Ophthalmology, Chonnam National University Medical School and Hospital and Center for Creative Biomedical Scientists at Chonnam National University, Gwangju, South Korea
| | - Hyo Seok Lee
- Department of Ophthalmology, Chonnam National University Medical School and Hospital and Center for Creative Biomedical Scientists at Chonnam National University, Gwangju, South Korea
| | - Ji Suk Choi
- Department of Ophthalmology, Chonnam National University Medical School and Hospital and Center for Creative Biomedical Scientists at Chonnam National University, Gwangju, South Korea
| | - Je Moon Woo
- Department of Ophthalmology, Ulsan University Hospital, University of Ulsan College of Medicine, Ulsan, South Korea
| | - Seul Ki Lim
- Microbiology and Functionality Research Group, R & D Division, World Institute of Kimchi, Gwangju, South Korea
| | - Kyung Chul Yoon
- Department of Ophthalmology, Chonnam National University Medical School and Hospital and Center for Creative Biomedical Scientists at Chonnam National University, Gwangju, South Korea
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36
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Zhong J, Deng Y, Tian B, Wang B, Sun Y, Huang H, Chen L, Ling S, Yuan J. Hyaluronate Acid-Dependent Protection and Enhanced Corneal Wound Healing against Oxidative Damage in Corneal Epithelial Cells. J Ophthalmol 2016; 2016:6538051. [PMID: 27190638 PMCID: PMC4848450 DOI: 10.1155/2016/6538051] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2015] [Accepted: 02/16/2016] [Indexed: 12/25/2022] Open
Abstract
Purpose. To evaluate the effects and mechanism of exogenous hyaluronate (HA) in promoting corneal wound healing. Methods. Human corneal epithelial cells (HCECs) were incubated with different concentrations of HA to evaluate their efficiency in promoting cell migration and their modulation of repair factors. After inducing hyperosmolar conditions, the cell morphologies, cell apoptosis, and expression levels of TNF-α and MMP-9 were detected to assess the protective role of HA. Corneal epithelium-injured rat models were established to test the therapeutic effects of 0.3% HA. Then, the wound healing rates, the RNA expression levels of inflammatory cytokines, and repair factors were examined. Results. HCECs in the 0.03% and 0.3% HA groups showed fewer morphological alterations and lower rates of cell apoptosis following preincubation with HA under hyperosmolar conditions, as well as the expression levels of MMP-9 and TNF-α. In the rat model, the areas of fluorescein staining in the corneas of 0.3% HA group were significantly smaller than the control group. The expression levels of IL-1β and MMP-9 were decreased, while CD44 and FN were increased in the 0.3% HA group. Conclusion. HA enhanced corneal epithelial cell wound healing by promoting cell migration, upregulating repair responses, and suppressing inflammatory responses.
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Affiliation(s)
- Jing Zhong
- State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Centre, Sun Yat-sen University, Guangzhou 510000, China
| | - Yuqing Deng
- State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Centre, Sun Yat-sen University, Guangzhou 510000, China
| | - Bishan Tian
- State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Centre, Sun Yat-sen University, Guangzhou 510000, China
| | - Bowen Wang
- State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Centre, Sun Yat-sen University, Guangzhou 510000, China
| | - Yifang Sun
- State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Centre, Sun Yat-sen University, Guangzhou 510000, China
| | - Haixiang Huang
- State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Centre, Sun Yat-sen University, Guangzhou 510000, China
| | - Ling Chen
- State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Centre, Sun Yat-sen University, Guangzhou 510000, China
| | - Shiqi Ling
- Department of Ophthalmology, The Third Affiliated Hospital, Sun Yat-sen University, Guangzhou 510000, China
| | - Jin Yuan
- State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Centre, Sun Yat-sen University, Guangzhou 510000, China
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Herrmann JE, Fisher RL, Vickers AE. The Delay of Corneal Wound Healing by Diclofenac in a Human Ex Vivo Front of the Eye Model and Rabbit Models. ACTA ACUST UNITED AC 2016. [DOI: 10.1089/aivt.2015.0026] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
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Abstract
Corneal wound healing is a complex process involving cell death, migration, proliferation, differentiation, and extracellular matrix remodeling. Many similarities are observed in the healing processes of corneal epithelial, stromal and endothelial cells, as well as cell-specific differences. Corneal epithelial healing largely depends on limbal stem cells and remodeling of the basement membrane. During stromal healing, keratocytes get transformed to motile and contractile myofibroblasts largely due to activation of transforming growth factor-β (TGF-β) system. Endothelial cells heal mostly by migration and spreading, with cell proliferation playing a secondary role. In the last decade, many aspects of wound healing process in different parts of the cornea have been elucidated, and some new therapeutic approaches have emerged. The concept of limbal stem cells received rigorous experimental corroboration, with new markers uncovered and new treatment options including gene and microRNA therapy tested in experimental systems. Transplantation of limbal stem cell-enriched cultures for efficient re-epithelialization in stem cell deficiency and corneal injuries has become reality in clinical setting. Mediators and course of events during stromal healing have been detailed, and new treatment regimens including gene (decorin) and stem cell therapy for excessive healing have been designed. This is a very important advance given the popularity of various refractive surgeries entailing stromal wound healing. Successful surgical ways of replacing the diseased endothelium have been clinically tested, and new approaches to accelerate endothelial healing and suppress endothelial-mesenchymal transformation have been proposed including Rho kinase (ROCK) inhibitor eye drops and gene therapy to activate TGF-β inhibitor SMAD7. Promising new technologies with potential for corneal wound healing manipulation including microRNA, induced pluripotent stem cells to generate corneal epithelium, and nanocarriers for corneal drug delivery are discussed. Attention is also paid to problems in wound healing understanding and treatment, such as lack of specific epithelial stem cell markers, reliable identification of stem cells, efficient prevention of haze and stromal scar formation, lack of data on wound regulating microRNAs in keratocytes and endothelial cells, as well as virtual lack of targeted systems for drug and gene delivery to select corneal cells.
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Affiliation(s)
- Alexander V Ljubimov
- Eye Program, Board of Governors Regenerative Medicine Institute, Departments of Biomedical Sciences and Neurosurgery, Cedars-Sinai Medical Center, David Geffen School of Medicine at UCLA, Los Angeles, CA, USA.
| | - Mehrnoosh Saghizadeh
- Eye Program, Board of Governors Regenerative Medicine Institute, Departments of Biomedical Sciences and Neurosurgery, Cedars-Sinai Medical Center, David Geffen School of Medicine at UCLA, Los Angeles, CA, USA
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Chae JJ, McIntosh Ambrose W, Espinoza FA, Mulreany DG, Ng S, Takezawa T, Trexler MM, Schein OD, Chuck RS, Elisseeff JH. Regeneration of corneal epithelium utilizing a collagen vitrigel membrane in rabbit models for corneal stromal wound and limbal stem cell deficiency. Acta Ophthalmol 2015; 93:e57-66. [PMID: 25495158 DOI: 10.1111/aos.12503] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2014] [Accepted: 06/15/2014] [Indexed: 12/27/2022]
Abstract
PURPOSE This study was performed to evaluate the potential of a collagen-based membrane, collagen vitrigel (CV), for reconstructing corneal epithelium in the stromal wound and limbal stem cell deficiency (LSCD) models. METHODS Three groups of rabbits were used in the stromal wound model: CV affixed using fibrin glue (CV + FG group, n = 9), fibrin glue only (FG group, n = 3) and an untreated control group (n = 3). In the LSCD model, one group received CV containing human limbal epithelial cells (CV + hLEC group, n = 2) and the other was an untreated control (n = 1). Gross observation, including fluorescent staining, pathological examination, immunohistochemistry and electron microscopy, was used to evaluate the effect of CV on the corneal epithelium. RESULTS In the stromal wound model, fluorescent staining showed that epithelial reconstruction occurred as rapidly in the CV + FG group as it did in the control group. The pathological examination proved that the CV supported a healthy corneal epithelium in the CV + FG group, whereas FG led to hypertrophy and inappropriate differentiation of corneal epithelium in the FG group. In the LSCD model, the corneas in the CV + hLEC group showed sustained tissue transparency with good epithelialization, low inflammatory response and reduced neovascularization. However, the control cornea was translucent and showed high amounts of inflammation and neovascularization. CONCLUSION We have demonstrated that CV supports corneal epithelial differentiation and prevents epithelial hypertrophy, in addition to serving as a scaffold for hLEC transplantation, without complications.
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Affiliation(s)
- J. Jeremy Chae
- Translational Tissue Engineering Center; Wilmer Eye Institute and Department of Biomedical Engineering; Johns Hopkins University; Baltimore Maryland USA
| | - Winnette McIntosh Ambrose
- Translational Tissue Engineering Center; Wilmer Eye Institute and Department of Biomedical Engineering; Johns Hopkins University; Baltimore Maryland USA
| | - Freddy A. Espinoza
- Translational Tissue Engineering Center; Wilmer Eye Institute and Department of Biomedical Engineering; Johns Hopkins University; Baltimore Maryland USA
| | - Daniel G. Mulreany
- Translational Tissue Engineering Center; Wilmer Eye Institute and Department of Biomedical Engineering; Johns Hopkins University; Baltimore Maryland USA
| | - Shengyong Ng
- Translational Tissue Engineering Center; Wilmer Eye Institute and Department of Biomedical Engineering; Johns Hopkins University; Baltimore Maryland USA
| | - Toshiaki Takezawa
- Division of Animal Sciences; National Institute of Agrobiological Sciences; Tsukuba Japan
| | - Morgana M. Trexler
- Research and Exploratory Development Department; The Johns Hopkins University Applied Physics Laboratory; Laurel Maryland USA
| | - Oliver D. Schein
- Department of Ophthalmology; Johns Hopkins University; Baltimore Maryland USA
| | - Roy S. Chuck
- Department of Ophthalmology; Montefiore Medical Center; Albert Einstein College of Medicine; Bronx New York USA
| | - Jennifer H. Elisseeff
- Translational Tissue Engineering Center; Wilmer Eye Institute and Department of Biomedical Engineering; Johns Hopkins University; Baltimore Maryland USA
- Department of Ophthalmology; Johns Hopkins University; Baltimore Maryland USA
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