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Huang Z, Huang Q, Xu K, Liang L, Li Y, Zhou W, Ning N, Zhou J, Hu J, Liu S, Dang L. Protective effect of ZYMT, a traditional Chinese patent medicine in a mouse model of retinitis pigmentosa. Biomed Pharmacother 2023; 162:114580. [PMID: 36989720 DOI: 10.1016/j.biopha.2023.114580] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2023] [Revised: 03/19/2023] [Accepted: 03/21/2023] [Indexed: 03/29/2023] Open
Abstract
Retinitis pigmentosa (RP) is the most common genetic disorder that causes blindness. At present, there exists no remedy for the disease. The aim of the current research was to investigate the protective effect of Zhangyanming Tablets (ZYMT) in a mouse model of RP, and explore the underlying mechanism. Eighty RP mice were randomly divided into two groups. The mice in ZYMT group were administered with ZYMT suspension(0.0378 g/mL), while the mice in model group were given the same volume of distilled water. At day 7 and day 14 after intervention, electroretinogram (ERG), fundus photography, and histological examination were used to assess the retinal function and structure. TUNEL, immunofluorescence and qPCR were used to evaluate cell apoptosis and expressions of Sirt1, Iba1, Bcl-2, Bax and Caspase-3. A significantly shortened latency of ERG waves was observed in ZYMT-treated mice, in comparison to those in the model group (P < 0.05). Histologically, ultrastructure of the retina was better preserved, and the outer nuclear layer (ONL) exhibited marked increase in thickness and cell count in ZYMP group (P < 0.05). The apoptosis rate was decreased markedly in ZYMT group. Immunofluorescence analysis showed that the expressions of Iba1 and Bcl-2 in the retina were increased, Bax and Caspase-3 were decreased after ZYMT intervention, while the qPCR revealed that the expressions of Iba1 and Sirt1 were significantly increased (P < 0.05). This study indicated that ZYMT has protective effect on retinal function and morphology of inherited RP mice in the early stage, possibly mediated via the regulation of antioxidant and anti-/pro-apoptotic factors expressions.
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Chen Z, Yang Z, Li X, Wang H, Wang Y, Ding C, Yang J, Ni N, Mei Y, Zhang S. microRNA-320a prevent Müller cells from hypoxia injury by targeting aquaporin-4. J Cell Biochem 2020; 121:4711-4723. [PMID: 32830348 DOI: 10.1002/jcb.29524] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2018] [Accepted: 10/08/2019] [Indexed: 12/15/2022]
Abstract
Müller cells are closely related to diabetic retinopathy (DR). Aquaporin-4 (AQP4) can effectively promote the diffusion of water across cellular membranes. However, the dynamic balance of water plays key role in many diseases, such as cerebral edema. Meanwhile, the unusual expression and distribution of AQP4 in the retina are the significant causes of ocular hypertension and reperfusion injury. To explore the functional significance between microRNA-320a (miR-320a) and AQP4 in pathological hypoxia-induced DR related retinal edema, we hypothesized that miR-320a regulates AQP4 expression and internalization to relieve the edema of Müller cells under the pathological retinal hypoxia stress by targeting AQP4, thereby attenuate the damage of Müller cells. Results demonstrated that miR-320a mimics inhibited the expressions of AQP4 in Müller cells. Furthermore, overexpression miR-320a protected Müller cells by suppressing superoxide anion. In addition, overexpression miR-320a markedly attenuated hypoxia-induced injury, significantly increased the cell viability, and promoted the internalization of AQP4. Furthermore, miR-320a can also regulate the stable anchoring of AQP4 on the cell membrane. Our study indicated that miR-320a may be a potential modulator which can mediate AQP4 expression and attenuate the hypoxia damage of Müller cells. In conclusion, miR-320a may be a potential target for DR therapy by targeting AQP4.
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Affiliation(s)
- Zhen Chen
- Department of Ophthalmology, The First People's Hospital of Yunnan, Kunming, Yunnan, China
- Department of Ophthalmology, Research Center of Fundus Disease of Yunnan, Kunming, Yunnan, China
- Department of Ophthalmology, Kunming University of Science and Technology Affiliated Hospital, Kunming, Yunnan, China
- Medical college, Kunming University of Science and Technology, Kunming, Yunnan, China
- Department of Ophthalmology, Dali University, Dali, Yunnan, China
| | - Zhengrong Yang
- Department of Ophthalmology, The First People's Hospital of Yunnan, Kunming, Yunnan, China
- Department of Ophthalmology, Research Center of Fundus Disease of Yunnan, Kunming, Yunnan, China
| | - Xiaoliang Li
- Department of Ophthalmology, The First People's Hospital of Yunnan, Kunming, Yunnan, China
- Department of Ophthalmology, Research Center of Fundus Disease of Yunnan, Kunming, Yunnan, China
- Department of Ophthalmology, Kunming University of Science and Technology Affiliated Hospital, Kunming, Yunnan, China
- Medical college, Kunming University of Science and Technology, Kunming, Yunnan, China
| | - He Wang
- Department of Ophthalmology, The First People's Hospital of Yunnan, Kunming, Yunnan, China
- Department of Ophthalmology, Research Center of Fundus Disease of Yunnan, Kunming, Yunnan, China
- Department of Ophthalmology, Kunming University of Science and Technology Affiliated Hospital, Kunming, Yunnan, China
| | - Yonggang Wang
- Department of Ophthalmology, The First People's Hospital of Yunnan, Kunming, Yunnan, China
- Department of Ophthalmology, Research Center of Fundus Disease of Yunnan, Kunming, Yunnan, China
- Department of Ophthalmology, Kunming University of Science and Technology Affiliated Hospital, Kunming, Yunnan, China
| | - Chao Ding
- Department of Ophthalmology, The First People's Hospital of Yunnan, Kunming, Yunnan, China
- Department of Ophthalmology, Research Center of Fundus Disease of Yunnan, Kunming, Yunnan, China
- Department of Ophthalmology, Kunming University of Science and Technology Affiliated Hospital, Kunming, Yunnan, China
| | - JingYing Yang
- Department of Ophthalmology, The First People's Hospital of Yunnan, Kunming, Yunnan, China
- Department of Ophthalmology, Research Center of Fundus Disease of Yunnan, Kunming, Yunnan, China
- Department of Ophthalmology, Kunming University of Science and Technology Affiliated Hospital, Kunming, Yunnan, China
| | - Ninghua Ni
- Department of Ophthalmology, The First People's Hospital of Yunnan, Kunming, Yunnan, China
- Department of Ophthalmology, Research Center of Fundus Disease of Yunnan, Kunming, Yunnan, China
- Department of Ophthalmology, Kunming University of Science and Technology Affiliated Hospital, Kunming, Yunnan, China
| | - Yan Mei
- Department of Ophthalmology, The First People's Hospital of Yunnan, Kunming, Yunnan, China
- Department of Ophthalmology, Research Center of Fundus Disease of Yunnan, Kunming, Yunnan, China
- Department of Ophthalmology, Kunming University of Science and Technology Affiliated Hospital, Kunming, Yunnan, China
- Medical college, Kunming University of Science and Technology, Kunming, Yunnan, China
- Department of Ophthalmology, Dali University, Dali, Yunnan, China
| | - Shiwen Zhang
- Head and Neck Surgery, The Third Affiliated Hospital of Kunming Medical University, Kunming, Yunnan, China
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Ahn SM, Ahn J, Cha S, Yun C, Park TK, Goo YS, Kim SW. Development of a Post-vitrectomy Injection of N-methyl-N-nitrosourea as a Localized Retinal Degeneration Rabbit Model. Exp Neurobiol 2019; 28:62-73. [PMID: 30853825 PMCID: PMC6401555 DOI: 10.5607/en.2019.28.1.62] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2018] [Revised: 02/01/2019] [Accepted: 02/07/2019] [Indexed: 12/26/2022] Open
Abstract
Since genetic models for retinal degeneration (RD) in animals larger than rodents have not been firmly established to date, we sought in the present study to develop a new rabbit model of drug-induced RD. First, intravitreal injection of N-methyl-N-nitrosourea (MNU) without vitrectomy in rabbits was performed with different doses. One month after injection, morphological changes in the retinas were identified with ultra-wide-field color fundus photography (FP) and fundus autofluorescence (AF) imaging as well as spectral-domain optical coherence tomography (OCT). Notably, the degree of RD was not consistently correlated with MNU dose. Then, to check the effects of vitrectomy on MNU-induced RD, the intravitreal injection of MNU after vitrectomy in rabbits was also performed with different doses. In OCT, while there were no significant changes in the retinas for injections up to 0.1 mg (i.e., sham, 0.05 mg, and 0.1 mg), outer retinal atrophy and retinal atrophy of the whole layer were observed with MNU injections of 0.3 mg and 0.5 mg, respectively. With this outcome, 0.2 mg MNU was chosen to be injected into rabbit eyes (n=10) at two weeks after vitrectomy for further study. Six weeks after injection, morphological identification with FP, AF, OCT, and histology clearly showed localized outer RD - clearly bordered non-degenerated and degenerated outer retinal area - in all rabbits. We suggest our post-vitrectomy MNU-induced RD rabbit model could be used as an interim animal model for visual prosthetics before the transition to larger animal models.
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Affiliation(s)
- So Min Ahn
- Department of Ophthalmology, Korea University College of Medicine, Seoul 08373, Korea
| | - Jungryul Ahn
- Department of Physiology, Chungbuk National University School of Medicine, Cheongju 28644, Korea
| | - Seongkwang Cha
- Department of Physiology, Chungbuk National University School of Medicine, Cheongju 28644, Korea
| | - Cheolmin Yun
- Department of Ophthalmology, Korea University College of Medicine, Seoul 08373, Korea
| | - Tae Kwann Park
- Department of Ophthalmology, Soonchunhyang University Hospital Bucheon, Bucheon 14584, Korea
| | - Yong Sook Goo
- Department of Physiology, Chungbuk National University School of Medicine, Cheongju 28644, Korea
| | - Seong-Woo Kim
- Department of Ophthalmology, Korea University College of Medicine, Seoul 08373, Korea
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Cationic polyene phospholipids as DNA carriers for ocular gene therapy. BIOMED RESEARCH INTERNATIONAL 2014; 2014:703253. [PMID: 25147812 PMCID: PMC4131563 DOI: 10.1155/2014/703253] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/28/2014] [Accepted: 06/18/2014] [Indexed: 11/17/2022]
Abstract
Recent success in the treatment of congenital blindness demonstrates the potential of ocular gene therapy as a therapeutic approach. The eye is a good target due to its small size, minimal diffusion of therapeutic agent to the systemic circulation, and low immune and inflammatory responses. Currently, most approaches are based on viral vectors, but efforts continue towards the synthesis and evaluation of new nonviral carriers to improve nucleic acid delivery. Our objective is to evaluate the efficiency of novel cationic retinoic and carotenoic glycol phospholipids, designated C20-18, C20-20, and C30-20, to deliver DNA to human retinal pigmented epithelium (RPE) cells. Liposomes were produced by solvent evaporation of ethanolic mixtures of the polyene compounds and coformulated with 1,2-dioleoyl-sn-glycero-3-phosphoethanolamine (DOPE) or cholesterol (Chol). Addition of DNA to the liposomes formed lipoplexes, which were characterized for binding, size, biocompatibility, and transgene efficiency. Lipoplex formulations of suitable size and biocompatibility were assayed for DNA delivery, both qualitatively and quantitatively, using RPE cells and a GFP-encoding plasmid. The retinoic lipoplex formulation with DOPE revealed a transfection efficiency comparable to the known lipid references 3β-[N-(N′,N′-dimethylaminoethane)-carbamoyl]-cholesterol (DC-Chol) and 1,2-dioleoyl-sn-glycero-3-ethylphosphocholine (EPC) and GeneJuice. The results demonstrate that cationic polyene phospholipids have potential as DNA carriers for ocular gene therapy.
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Sun Y, Wang D, Ye F, Hu DN, Liu X, Zhang L, Gao L, Song E, Zhang DY. Elevated cell proliferation and VEGF production by high-glucose conditions in Müller cells involve XIAP. Eye (Lond) 2013; 27:1299-307. [PMID: 23928877 PMCID: PMC3831121 DOI: 10.1038/eye.2013.158] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2013] [Accepted: 06/27/2013] [Indexed: 12/19/2022] Open
Abstract
PURPOSE Müller cells have important roles in the pathogenesis of diabetic retinopathy by promoting cell proliferation and inducing the production of vascular endothelial growth factor (VEGF) under hyperglycemic conditions. The objective of this study was to determine the potential mechanism of Müller cell proliferation and VEGF production due to high-glucose conditions. METHODS Primary cultured rat Müller cells were incubated with medium containing variable concentrations of glucose and/or embelin, a specific inhibitor of X-linked inhibitor of apoptosis protein (XIAP), for 72 h. The proliferation of Müller cells was assessed by the MTT assay. The expression and/or phosphorylation of 146 proteins were assessed using protein pathway array. RESULTS High concentrations of glucose-induced Müller cell proliferation and altered expression and/or phosphorylation of 47 proteins that have been identified to have key roles in several important signaling pathways (XIAP, VEGF, HIF1α, NFκB, etc) and are involved in the regulation of cell survival, proliferation, or apoptosis. However, Müller cell alterations induced by high-glucose conditions were counteracted by the XIAP inhibitor embelin, and 26 proteins/phosphorylations (out of 47) were restored to their normal levels. Nine proteins, including NFκB p65, p-p38, tumor necrosis factor-α, urokinase-type plasminogen activator, CREB, IL-1β, HCAM, estrogen receptor-α, and p-Stat3, were involved in regulatory networks between XIAP and VEGF. CONCLUSIONS The current study suggests that XIAP may be a potential regulator that can mediate a series of pathological changes induced by high-glucose conditions in Müller cells. Therefore, embelin could be a potential agent for the prevention and treatment of diabetic retinopathy.
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Affiliation(s)
- Y Sun
- Department of Ophthalmology, The First Hospital of Jilin University, Changchun, China
| | - D Wang
- Department of General Surgery, The First Hospital of Jilin University, Changchun, China
| | - F Ye
- Department of Pathology, Mount Sinai School of Medicine, New York, NY, USA
| | - D-N Hu
- Department of Ophthalmology, New York Medical College, New York, NY, USA
- Tissue Culture Center, New York Eye and Ear Infirmary, New York, NY, USA
| | - X Liu
- Department of Ophthalmology, The First Hospital of Jilin University, Changchun, China
| | - L Zhang
- Department of Ophthalmology, The First Hospital of Jilin University, Changchun, China
| | - L Gao
- Department of Oncology, The First Hospital of Jilin University, Changchun, China
| | - E Song
- Department of Ophthalmology, The First Hospital of Jilin University, Changchun, China
| | - D Y Zhang
- Department of Pathology, Mount Sinai School of Medicine, New York, NY, USA
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