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Sharif NA. Therapeutic Drugs and Devices for Tackling Ocular Hypertension and Glaucoma, and Need for Neuroprotection and Cytoprotective Therapies. Front Pharmacol 2021; 12:729249. [PMID: 34603044 PMCID: PMC8484316 DOI: 10.3389/fphar.2021.729249] [Citation(s) in RCA: 26] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2021] [Accepted: 08/18/2021] [Indexed: 12/11/2022] Open
Abstract
Damage to the optic nerve and the death of associated retinal ganglion cells (RGCs) by elevated intraocular pressure (IOP), also known as glaucoma, is responsible for visual impairment and blindness in millions of people worldwide. The ocular hypertension (OHT) and the deleterious mechanical forces it exerts at the back of the eye, at the level of the optic nerve head/optic disc and lamina cribosa, is the only modifiable risk factor associated with glaucoma that can be treated. The elevated IOP occurs due to the inability of accumulated aqueous humor (AQH) to egress from the anterior chamber of the eye due to occlusion of the major outflow pathway, the trabecular meshwork (TM) and Schlemm’s canal (SC). Several different classes of pharmaceutical agents, surgical techniques and implantable devices have been developed to lower and control IOP. First-line drugs to promote AQH outflow via the uveoscleral outflow pathway include FP-receptor prostaglandin (PG) agonists (e.g., latanoprost, travoprost and tafluprost) and a novel non-PG EP2-receptor agonist (omidenepag isopropyl, Eybelis®). TM/SC outflow enhancing drugs are also effective ocular hypotensive agents (e.g., rho kinase inhibitors like ripasudil and netarsudil; and latanoprostene bunod, a conjugate of a nitric oxide donor and latanoprost). One of the most effective anterior chamber AQH microshunt devices is the Preserflo® microshunt which can lower IOP down to 10–13 mmHg. Other IOP-lowering drugs and devices on the horizon will be also discussed. Additionally, since elevated IOP is only one of many risk factors for development of glaucomatous optic neuropathy, a treatise of the role of inflammatory neurodegeneration of the optic nerve and retinal ganglion cells and appropriate neuroprotective strategies to mitigate this disease will also be reviewed and discussed.
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Affiliation(s)
- Najam A Sharif
- Global Alliances and External Research, Ophthalmology Innovation Center, Santen Inc., Emeryville, CA, United States
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Luo ZW, Wang HT, Wang N, Sheng WW, Jin M, Lu Y, Bai YJ, Zou SQ, Pang YL, Xu H, Zhang X. Establishment of an adult zebrafish model of retinal neurodegeneration induced by NMDA. Int J Ophthalmol 2019; 12:1250-1261. [PMID: 31456914 PMCID: PMC6694058 DOI: 10.18240/ijo.2019.08.04] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2018] [Accepted: 05/31/2019] [Indexed: 02/07/2023] Open
Abstract
AIM To establish a model of retinal neurodegeneration induced by N-Methyl-D-aspartic acid (NMDA) in adult zebrafish. METHODS We compared the effects of three different NMDA delivery methods on retinal neurodegeneration in adult zebrafish: immersion (I.M.), intravitreal injection (I.V.), and intraperitoneal injection (I.P.), and examined retinal pathology and degeneration by hematoxylin and eosin and TUNEL staining in the treated zebrafish. Effects of the NMDA receptor antagonist MK-801 and the natural product resveratrol on NMDA-induced retinal neurodegeneration were also assessed. RESULTS The thickened inner retina was seen in histology with 100 µmol/L NMDA by I.M. administration. Significant apoptosis in the retinal ganglion cell layer and retinal thickness reduction occurred in 0.5 mol/L NMDA I.P. administration group.Seizure-like behavioral changes, but no retinal histological alteration occurred in 16 mg/kg NMDA I.P. administration group. Resveratrol and MK-801 prevented NMDA-induced retinal neurodegeneration in the zebrafish. CONCLUSION Among the three drug administration methods, I.V. injection of NMDA is the most suitable for establishment of an acute retinal damage model in zebrafish. I.M. with NMDA is likely the best for use as a chronic retinal damage model. I.P. treatment with NMDA causes brain damage. Resveratrol and MK801 may be a clinically valuable treatment for retinal neurodegeneration.
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Affiliation(s)
- Zhi-Wen Luo
- Affiliated Eye Hospital of Nanchang University; Jiangxi Research Institute of Ophthalmology & Visual Science, Nanchang 330006, Jiangxi Province, China
- Queen Mary School of Nanchang University, Nanchang 330031, Jiangxi Province, China
| | - Han-Tsing Wang
- Institute of Life Science, Nanchang University, Nanchang 330031, Jiangxi Province, China
- Jiangxi Provincial Collaborative Innovation Center for Cardiovascular, Digestive and Neuropsychiatric Diseases, Nanchang 330031, Jiangxi Province, China
| | - Ning Wang
- Affiliated Eye Hospital of Nanchang University; Jiangxi Research Institute of Ophthalmology & Visual Science, Nanchang 330006, Jiangxi Province, China
- Queen Mary School of Nanchang University, Nanchang 330031, Jiangxi Province, China
| | - Wei-Wei Sheng
- Affiliated Eye Hospital of Nanchang University; Jiangxi Research Institute of Ophthalmology & Visual Science, Nanchang 330006, Jiangxi Province, China
- Queen Mary School of Nanchang University, Nanchang 330031, Jiangxi Province, China
| | - Ming Jin
- Affiliated Eye Hospital of Nanchang University; Jiangxi Research Institute of Ophthalmology & Visual Science, Nanchang 330006, Jiangxi Province, China
| | - Ye Lu
- Affiliated Eye Hospital of Nanchang University; Jiangxi Research Institute of Ophthalmology & Visual Science, Nanchang 330006, Jiangxi Province, China
| | - Yi-Jiang Bai
- Affiliated Eye Hospital of Nanchang University; Jiangxi Research Institute of Ophthalmology & Visual Science, Nanchang 330006, Jiangxi Province, China
- Queen Mary School of Nanchang University, Nanchang 330031, Jiangxi Province, China
| | - Su-Qi Zou
- Institute of Life Science, Nanchang University, Nanchang 330031, Jiangxi Province, China
- Jiangxi Provincial Collaborative Innovation Center for Cardiovascular, Digestive and Neuropsychiatric Diseases, Nanchang 330031, Jiangxi Province, China
| | - Yu-Lian Pang
- Affiliated Eye Hospital of Nanchang University; Jiangxi Research Institute of Ophthalmology & Visual Science, Nanchang 330006, Jiangxi Province, China
| | - Hong Xu
- Institute of Life Science, Nanchang University, Nanchang 330031, Jiangxi Province, China
- Jiangxi Provincial Collaborative Innovation Center for Cardiovascular, Digestive and Neuropsychiatric Diseases, Nanchang 330031, Jiangxi Province, China
| | - Xu Zhang
- Affiliated Eye Hospital of Nanchang University; Jiangxi Research Institute of Ophthalmology & Visual Science, Nanchang 330006, Jiangxi Province, China
- Jiangxi Provincial Collaborative Innovation Center for Cardiovascular, Digestive and Neuropsychiatric Diseases, Nanchang 330031, Jiangxi Province, China
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Yao F, Zhang E, Gao Z, Ji H, Marmouri M, Xia X. Did you choose appropriate tracer for retrograde tracing of retinal ganglion cells? The differences between cholera toxin subunit B and Fluorogold. PLoS One 2018; 13:e0205133. [PMID: 30289890 PMCID: PMC6173421 DOI: 10.1371/journal.pone.0205133] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2018] [Accepted: 09/19/2018] [Indexed: 12/31/2022] Open
Abstract
Cholera toxin subunit B (CTB) and Fluorogold(FG) are two widely utilized retrograde tracers to assess the number and function of retinal ganglion cells (RGCs). However, the relative advantages and disadvantages of these tracers remain unclear, which may lead to their inappropriate application. In this study, we compared these tracers by separately injecting the tracer into the superior Colliculi (SC) in rats, one or 2 weeks later, the rats were sacrificed, and their retinas, brains, and optic nerves were collected. From the first to second week, FG displayed a greater number of labeled RGCs and a larger diffusion area in the SC than CTB; The number of CTB labeled RGCs and the diffusion area of CTB in the SC increased significantly, but there was no distinction between FG; Furthermore, CTB exhibited more labeled RGC neurites and longer neurites than FG, but no difference was evident between the same trace; The optic nerves labeled using CTB were much clearer than those labeled using FG. In conclusion, both CTB and FG can be used for the retrograde labeling of RGCs in rats at 1 or 2 weeks. FG achieves retrograde labeling of a greater number of RGCs than CTB, whereas CTB better delineates the morphology of RGCs. Furthermore, CTB seems more suitable for retrograde labeling of some small, non-image forming nuclei in the brain to which certain RGC subtypes project their axons.
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Affiliation(s)
- Fei Yao
- Department of Ophthalmology, Xiangya Hospital, Central South University, Changsha, Hunan, China
| | - Endong Zhang
- Department of Ophthalmology, Xiangya Hospital, Central South University, Changsha, Hunan, China
| | - Zhaolin Gao
- Department of Ophthalmology, Xiangya Hospital, Central South University, Changsha, Hunan, China
| | - Hongpei Ji
- Department of Ophthalmology, The People’s Hospital of Guizhou Province, Guiyang, Guizhou, China
| | - Mahmoud Marmouri
- Department of Ophthalmology, Xiangya Hospital, Central South University, Changsha, Hunan, China
| | - Xiaobo Xia
- Department of Ophthalmology, Xiangya Hospital, Central South University, Changsha, Hunan, China
- * E-mail:
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Akaiwa K, Namekata K, Azuchi Y, Guo X, Kimura A, Harada C, Mitamura Y, Harada T. Edaravone suppresses retinal ganglion cell death in a mouse model of normal tension glaucoma. Cell Death Dis 2017; 8:e2934. [PMID: 28703795 PMCID: PMC5550882 DOI: 10.1038/cddis.2017.341] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2017] [Revised: 06/06/2017] [Accepted: 06/19/2017] [Indexed: 01/16/2023]
Abstract
Glaucoma, one of the leading causes of irreversible blindness, is characterized by progressive degeneration of optic nerves and retinal ganglion cells (RGCs). In the mammalian retina, excitatory amino-acid carrier 1 (EAAC1) is expressed in neural cells, including RGCs. Loss of EAAC1 leads to RGC degeneration without elevated intraocular pressure (IOP) and exhibits glaucomatous pathology including glutamate neurotoxicity and oxidative stress. In the present study, we found that edaravone, a free radical scavenger that is used for treatment of acute brain infarction and amyotrophic lateral sclerosis (ALS), reduces oxidative stress and prevents RGC death and thinning of the inner retinal layer in EAAC1-deficient (KO) mice. In addition, in vivo electrophysiological analyses demonstrated that visual impairment in EAAC1 KO mice was ameliorated with edaravone treatment, clearly establishing that edaravone beneficially affects both histological and functional aspects of the glaucomatous retina. Our findings raise intriguing possibilities for the management of glaucoma by utilizing a widely prescribed drug for the treatment of acute brain infarction and ALS, edaravone, in combination with conventional treatments to lower IOP.
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Affiliation(s)
- Kei Akaiwa
- Visual Research Project, Tokyo Metropolitan Institute of Medical Science, Tokyo, Japan.,Department of Ophthalmology, Institute of Health Biosciences, The University of Tokushima Graduate School, Tokushima, Japan
| | - Kazuhiko Namekata
- Visual Research Project, Tokyo Metropolitan Institute of Medical Science, Tokyo, Japan
| | - Yuriko Azuchi
- Visual Research Project, Tokyo Metropolitan Institute of Medical Science, Tokyo, Japan
| | - Xiaoli Guo
- Visual Research Project, Tokyo Metropolitan Institute of Medical Science, Tokyo, Japan
| | - Atsuko Kimura
- Visual Research Project, Tokyo Metropolitan Institute of Medical Science, Tokyo, Japan
| | - Chikako Harada
- Visual Research Project, Tokyo Metropolitan Institute of Medical Science, Tokyo, Japan
| | - Yoshinori Mitamura
- Department of Ophthalmology, Institute of Health Biosciences, The University of Tokushima Graduate School, Tokushima, Japan
| | - Takayuki Harada
- Visual Research Project, Tokyo Metropolitan Institute of Medical Science, Tokyo, Japan.,Department of Ophthalmology, Institute of Health Biosciences, The University of Tokushima Graduate School, Tokushima, Japan
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Retinal Diseases Associated with Oxidative Stress and the Effects of a Free Radical Scavenger (Edaravone). OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2017; 2017:9208489. [PMID: 28194256 PMCID: PMC5286467 DOI: 10.1155/2017/9208489] [Citation(s) in RCA: 148] [Impact Index Per Article: 21.1] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/18/2016] [Accepted: 12/20/2016] [Indexed: 02/07/2023]
Abstract
Oxidative stress plays a pivotal role in developing and accelerating retinal diseases including age-related macular degeneration (AMD), glaucoma, diabetic retinopathy (DR), and retinal vein occlusion (RVO). An excess amount of reactive oxygen species (ROS) can lead to functional and morphological impairments in retinal pigment epithelium (RPE), endothelial cells, and retinal ganglion cells (RGCs). Here we demonstrate that edaravone, a free radical scavenger, decreased apoptotic cell death, oxidative damage to DNA and lipids, and angiogenesis through inhibiting JNK and p38 MAPK pathways in AMD, glaucoma, DR, and RVO animal models. These data suggest that the therapeutic strategy for targeting oxidative stress may be important for the treatment of these ocular diseases, and edaravone may be useful for treating retinal diseases associated with oxidative stress.
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Cornel Ş, Mihaela TC, Adriana ID, Mehdi B, Algerino DS. NOVELTIES IN MEDICAL TREATMENT OF GLAUCOMA. Rom J Ophthalmol 2015; 59:78-87. [PMID: 26978866 PMCID: PMC5712934] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 04/14/2015] [Indexed: 06/05/2023] Open
Abstract
The purpose of this study is to review the current medical treatment and the new and better alternatives for patients with glaucoma. Glaucoma refers to a group of related eye disorders that have in common an optic neuropathy associated with visual function loss. It is one of the leading causes of irreversible blindness worldwide. Glaucoma can damage vision gradually so it may not be noticed until the disease is at an advanced stage. Early diagnosis and treatment can minimize or prevent optic nerve damage and limit glaucoma-related vision loss. Nowadays, research continues for the improvement of current medical treatment.
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Affiliation(s)
- Ştefan Cornel
- Ophthalmology Department “Dr. Carol Davila” Central Military Emergency University Hospital,
Bucharest, Romania
| | - Timaru Cristina Mihaela
- Ophthalmology Department “Dr. Carol Davila” Central Military Emergency University Hospital,
Bucharest, Romania
| | - Iliescu Daniela Adriana
- Ophthalmology Department “Dr. Carol Davila” Central Military Emergency University Hospital,
Bucharest, Romania
| | - Batras Mehdi
- Ophthalmology Department “Dr. Carol Davila” Central Military Emergency University Hospital,
Bucharest, Romania
| | - De Simone Algerino
- Ophthalmology Department “Dr. Carol Davila” Central Military Emergency University Hospital,
Bucharest, Romania
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