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Amankwa CE, Young O, DebNath B, Gondi SR, Rangan R, Ellis DZ, Zode G, Stankowska DL, Acharya S. Modulation of Mitochondrial Metabolic Parameters and Antioxidant Enzymes in Healthy and Glaucomatous Trabecular Meshwork Cells with Hybrid Small Molecule SA-2. Int J Mol Sci 2023; 24:11557. [PMID: 37511316 PMCID: PMC10380487 DOI: 10.3390/ijms241411557] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2023] [Revised: 07/08/2023] [Accepted: 07/11/2023] [Indexed: 07/30/2023] Open
Abstract
Oxidative stress (OS)-induced mitochondrial damage is a risk factor for primary open-angle glaucoma (POAG). Mitochondria-targeted novel antioxidant therapies could unearth promising drug candidates for the management of POAG. Previously, our dual-acting hybrid molecule SA-2 with nitric oxide-donating and antioxidant activity reduced intraocular pressure and improved aqueous humor outflow in rodent eyes. Here, we examined the mechanistic role of SA-2 in trabecular meshwork (TM) cells in vitro and measured the activity of intracellular antioxidant enzymes during OS. Primary human TM cells isolated from normal (hNTM) or glaucomatous (hGTM) post-mortem donors and transformed glaucomatous TM cells (GTM-3) were used for in vitro assays. We examined the effect of SA-2 on oxygen consumption rate (OCR) and extracellular acidification rate (ECAR) in vitro using Seahorse Analyzer with or without the oxidant, tert-butyl hydroperoxide (TBHP) treatment. Concentrations of total antioxidant enzymes, catalase (CAT), malondialdehyde (MDA), and glutathione peroxidase (GPx) were measured. We observed significant protection of both hNTM and hGTM cells from TBHP-induced cell death by SA-2. Antioxidant enzymes were elevated in SA-2-treated cells compared to TBHP-treated cells. In addition, SA-2 demonstrated an increase in mitochondrial metabolic parameters. Altogether, SA-2 protected both normal and glaucomatous TM cells from OS via increasing mitochondrial energy parameters and the activity of antioxidant enzymes.
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Affiliation(s)
- Charles E. Amankwa
- Department of Pharmacology and Neuroscience, University of North Texas Health Science Center, Fort Worth, TX 76107, USA; (C.E.A.); (O.Y.); (B.D.); (S.R.G.); (R.R.)
- North Texas Eye Research Institute, University of North Texas Health Science Center, Fort Worth, TX 76107, USA;
| | - Olivia Young
- Department of Pharmacology and Neuroscience, University of North Texas Health Science Center, Fort Worth, TX 76107, USA; (C.E.A.); (O.Y.); (B.D.); (S.R.G.); (R.R.)
- North Texas Eye Research Institute, University of North Texas Health Science Center, Fort Worth, TX 76107, USA;
| | - Biddut DebNath
- Department of Pharmacology and Neuroscience, University of North Texas Health Science Center, Fort Worth, TX 76107, USA; (C.E.A.); (O.Y.); (B.D.); (S.R.G.); (R.R.)
- North Texas Eye Research Institute, University of North Texas Health Science Center, Fort Worth, TX 76107, USA;
| | - Sudershan R. Gondi
- Department of Pharmacology and Neuroscience, University of North Texas Health Science Center, Fort Worth, TX 76107, USA; (C.E.A.); (O.Y.); (B.D.); (S.R.G.); (R.R.)
- North Texas Eye Research Institute, University of North Texas Health Science Center, Fort Worth, TX 76107, USA;
| | - Rajiv Rangan
- Department of Pharmacology and Neuroscience, University of North Texas Health Science Center, Fort Worth, TX 76107, USA; (C.E.A.); (O.Y.); (B.D.); (S.R.G.); (R.R.)
- North Texas Eye Research Institute, University of North Texas Health Science Center, Fort Worth, TX 76107, USA;
| | - Dorette Z. Ellis
- North Texas Eye Research Institute, University of North Texas Health Science Center, Fort Worth, TX 76107, USA;
- Department of Pharmaceutical Sciences, College of Pharmacy, University of North Texas Health Science Center, Fort Worth, TX 76107, USA
| | - Gulab Zode
- Department of Pharmacology and Neuroscience, University of North Texas Health Science Center, Fort Worth, TX 76107, USA; (C.E.A.); (O.Y.); (B.D.); (S.R.G.); (R.R.)
- North Texas Eye Research Institute, University of North Texas Health Science Center, Fort Worth, TX 76107, USA;
| | - Dorota L. Stankowska
- Department of Pharmacology and Neuroscience, University of North Texas Health Science Center, Fort Worth, TX 76107, USA; (C.E.A.); (O.Y.); (B.D.); (S.R.G.); (R.R.)
- North Texas Eye Research Institute, University of North Texas Health Science Center, Fort Worth, TX 76107, USA;
- Department of Microbiology, Immunology and Genetics, University of North Texas Health Science Center, Fort Worth, TX 76107, USA
| | - Suchismita Acharya
- Department of Pharmacology and Neuroscience, University of North Texas Health Science Center, Fort Worth, TX 76107, USA; (C.E.A.); (O.Y.); (B.D.); (S.R.G.); (R.R.)
- North Texas Eye Research Institute, University of North Texas Health Science Center, Fort Worth, TX 76107, USA;
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Pham JH, Johnson GA, Rangan RS, Amankwa CE, Acharya S, Stankowska DL. Neuroprotection of Rodent and Human Retinal Ganglion Cells In Vitro/Ex Vivo by the Hybrid Small Molecule SA-2. Cells 2022; 11:cells11233741. [PMID: 36497005 PMCID: PMC9735605 DOI: 10.3390/cells11233741] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2022] [Revised: 11/19/2022] [Accepted: 11/21/2022] [Indexed: 11/25/2022] Open
Abstract
The mechanisms underlying the neuroprotective effects of the hybrid antioxidant-nitric oxide donating compound SA-2 in retinal ganglion cell (RGC) degeneration models were evaluated. The in vitro trophic factor (TF) deprivation model in primary rat RGCs and ex vivo human retinal explants were used to mimic glaucomatous neurodegeneration. Cell survival was assessed after treatment with vehicle or SA-2. In separate experiments, tert-Butyl hydroperoxide (TBHP) and endothelin-3 (ET-3) were used in ex vivo rat retinal explants and primary rat RGCs, respectively, to induce oxidative damage. Mitochondrial and intracellular reactive oxygen species (ROS) were assessed following treatments. In the TF deprivation model, SA-2 treatment produced a significant decrease in apoptotic and dead cell counts in primary RGCs and a significant increase in RGC survival in ex vivo human retinal explants. In the oxidative stress-induced models, a significant decrease in the production of ROS was observed in the SA-2-treated group compared to the vehicle-treated group. Compound SA-2 was neuroprotective against various glaucomatous insults in the rat and human RGCs by reducing apoptosis and decreasing ROS levels. Amelioration of mitochondrial and cellular oxidative stress by SA-2 may be a potential therapeutic strategy for preventing neurodegeneration in glaucomatous RGCs.
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Affiliation(s)
- Jennifer H. Pham
- Department of Pharmacology & Neuroscience, University of North Texas Health Science Center, Fort Worth, TX 76107, USA
- The North Texas Eye Research Institute, University of North Texas Health Science Center, Fort Worth, TX 76107, USA
| | - Gretchen A. Johnson
- Department of Pharmacology & Neuroscience, University of North Texas Health Science Center, Fort Worth, TX 76107, USA
- The North Texas Eye Research Institute, University of North Texas Health Science Center, Fort Worth, TX 76107, USA
| | - Rajiv S. Rangan
- Department of Pharmacology & Neuroscience, University of North Texas Health Science Center, Fort Worth, TX 76107, USA
- The North Texas Eye Research Institute, University of North Texas Health Science Center, Fort Worth, TX 76107, USA
| | - Charles E. Amankwa
- Department of Pharmacology & Neuroscience, University of North Texas Health Science Center, Fort Worth, TX 76107, USA
- The North Texas Eye Research Institute, University of North Texas Health Science Center, Fort Worth, TX 76107, USA
| | - Suchismita Acharya
- Department of Pharmacology & Neuroscience, University of North Texas Health Science Center, Fort Worth, TX 76107, USA
- The North Texas Eye Research Institute, University of North Texas Health Science Center, Fort Worth, TX 76107, USA
- Correspondence: (S.A.); (D.L.S.)
| | - Dorota L. Stankowska
- Department of Pharmacology & Neuroscience, University of North Texas Health Science Center, Fort Worth, TX 76107, USA
- The North Texas Eye Research Institute, University of North Texas Health Science Center, Fort Worth, TX 76107, USA
- Correspondence: (S.A.); (D.L.S.)
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Yamakawa M, Santosa SM, Chawla N, Ivakhnitskaia E, Del Pino M, Giakas S, Nadel A, Bontu S, Tambe A, Guo K, Han KY, Cortina MS, Yu C, Rosenblatt MI, Chang JH, Azar DT. Transgenic models for investigating the nervous system: Currently available neurofluorescent reporters and potential neuronal markers. Biochim Biophys Acta Gen Subj 2020; 1864:129595. [PMID: 32173376 DOI: 10.1016/j.bbagen.2020.129595] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2019] [Revised: 02/24/2020] [Accepted: 03/03/2020] [Indexed: 02/06/2023]
Abstract
Recombinant DNA technologies have enabled the development of transgenic animal models for use in studying a myriad of diseases and biological states. By placing fluorescent reporters under the direct regulation of the promoter region of specific marker proteins, these models can localize and characterize very specific cell types. One important application of transgenic species is the study of the cytoarchitecture of the nervous system. Neurofluorescent reporters can be used to study the structural patterns of nerves in the central or peripheral nervous system in vivo, as well as phenomena involving embryologic or adult neurogenesis, injury, degeneration, and recovery. Furthermore, crucial molecular factors can also be screened via the transgenic approach, which may eventually play a major role in the development of therapeutic strategies against diseases like Alzheimer's or Parkinson's. This review describes currently available reporters and their uses in the literature as well as potential neural markers that can be leveraged to create additional, robust transgenic models for future studies.
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Affiliation(s)
- Michael Yamakawa
- Department of Ophthalmology and Visual Sciences, Illinois Eye and Ear Infirmary, College of Medicine, University of Illinois at Chicago, Chicago, IL, United States of America
| | - Samuel M Santosa
- Department of Ophthalmology and Visual Sciences, Illinois Eye and Ear Infirmary, College of Medicine, University of Illinois at Chicago, Chicago, IL, United States of America
| | - Neeraj Chawla
- Department of Ophthalmology and Visual Sciences, Illinois Eye and Ear Infirmary, College of Medicine, University of Illinois at Chicago, Chicago, IL, United States of America
| | - Evguenia Ivakhnitskaia
- Department of Ophthalmology and Visual Sciences, Illinois Eye and Ear Infirmary, College of Medicine, University of Illinois at Chicago, Chicago, IL, United States of America
| | - Matthew Del Pino
- Department of Ophthalmology and Visual Sciences, Illinois Eye and Ear Infirmary, College of Medicine, University of Illinois at Chicago, Chicago, IL, United States of America
| | - Sebastian Giakas
- Department of Ophthalmology and Visual Sciences, Illinois Eye and Ear Infirmary, College of Medicine, University of Illinois at Chicago, Chicago, IL, United States of America
| | - Arnold Nadel
- Department of Ophthalmology and Visual Sciences, Illinois Eye and Ear Infirmary, College of Medicine, University of Illinois at Chicago, Chicago, IL, United States of America
| | - Sneha Bontu
- Department of Ophthalmology and Visual Sciences, Illinois Eye and Ear Infirmary, College of Medicine, University of Illinois at Chicago, Chicago, IL, United States of America
| | - Arjun Tambe
- Department of Ophthalmology and Visual Sciences, Illinois Eye and Ear Infirmary, College of Medicine, University of Illinois at Chicago, Chicago, IL, United States of America
| | - Kai Guo
- Department of Ophthalmology and Visual Sciences, Illinois Eye and Ear Infirmary, College of Medicine, University of Illinois at Chicago, Chicago, IL, United States of America
| | - Kyu-Yeon Han
- Department of Ophthalmology and Visual Sciences, Illinois Eye and Ear Infirmary, College of Medicine, University of Illinois at Chicago, Chicago, IL, United States of America
| | - Maria Soledad Cortina
- Department of Ophthalmology and Visual Sciences, Illinois Eye and Ear Infirmary, College of Medicine, University of Illinois at Chicago, Chicago, IL, United States of America
| | - Charles Yu
- Department of Ophthalmology and Visual Sciences, Illinois Eye and Ear Infirmary, College of Medicine, University of Illinois at Chicago, Chicago, IL, United States of America
| | - Mark I Rosenblatt
- Department of Ophthalmology and Visual Sciences, Illinois Eye and Ear Infirmary, College of Medicine, University of Illinois at Chicago, Chicago, IL, United States of America
| | - Jin-Hong Chang
- Department of Ophthalmology and Visual Sciences, Illinois Eye and Ear Infirmary, College of Medicine, University of Illinois at Chicago, Chicago, IL, United States of America.
| | - Dimitri T Azar
- Department of Ophthalmology and Visual Sciences, Illinois Eye and Ear Infirmary, College of Medicine, University of Illinois at Chicago, Chicago, IL, United States of America.
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Stankowska DL, Dibas A, Li L, Zhang W, Krishnamoorthy VR, Chavala SH, Nguyen TP, Yorio T, Ellis DZ, Acharya S. Hybrid Compound SA-2 is Neuroprotective in Animal Models of Retinal Ganglion Cell Death. ACTA ACUST UNITED AC 2019; 60:3064-3073. [DOI: 10.1167/iovs.18-25999] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Affiliation(s)
- Dorota L. Stankowska
- Department of Pharmacology and Neuroscience, University of North Texas Health Science Center, Fort Worth, Texas, United States
- North Texas Eye Research Institute, University of North Texas Health Science Center, Fort Worth, Texas, United States
| | - Adnan Dibas
- Department of Pharmacology and Neuroscience, University of North Texas Health Science Center, Fort Worth, Texas, United States
- North Texas Eye Research Institute, University of North Texas Health Science Center, Fort Worth, Texas, United States
| | - Linya Li
- Department of Pharmaceutical Sciences, University of North Texas Health Science Center, Fort Worth, Texas, United States
| | - Wei Zhang
- Department of Pharmacology and Neuroscience, University of North Texas Health Science Center, Fort Worth, Texas, United States
- North Texas Eye Research Institute, University of North Texas Health Science Center, Fort Worth, Texas, United States
| | - Vignesh R. Krishnamoorthy
- Department of Pharmacology and Neuroscience, University of North Texas Health Science Center, Fort Worth, Texas, United States
- North Texas Eye Research Institute, University of North Texas Health Science Center, Fort Worth, Texas, United States
| | - Sai H. Chavala
- Department of Pharmacology and Neuroscience, University of North Texas Health Science Center, Fort Worth, Texas, United States
- North Texas Eye Research Institute, University of North Texas Health Science Center, Fort Worth, Texas, United States
| | - Tam Phung Nguyen
- Department of Bioengineering, The University of Texas at Arlington, Arlington, Texas, United States
| | - Thomas Yorio
- Department of Pharmacology and Neuroscience, University of North Texas Health Science Center, Fort Worth, Texas, United States
- North Texas Eye Research Institute, University of North Texas Health Science Center, Fort Worth, Texas, United States
| | - Dorette Z. Ellis
- North Texas Eye Research Institute, University of North Texas Health Science Center, Fort Worth, Texas, United States
- Department of Pharmaceutical Sciences, University of North Texas Health Science Center, Fort Worth, Texas, United States
| | - Suchismita Acharya
- Department of Pharmacology and Neuroscience, University of North Texas Health Science Center, Fort Worth, Texas, United States
- North Texas Eye Research Institute, University of North Texas Health Science Center, Fort Worth, Texas, United States
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The Superoxide Dismutase Mimetic TEMPOL and Its Effect on Retinal Ganglion Cells in Experimental Methanol-Intoxicated Rats. Ophthalmol Ther 2018; 7:167-172. [PMID: 29797209 PMCID: PMC5997599 DOI: 10.1007/s40123-018-0132-z] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2018] [Indexed: 11/15/2022] Open
Abstract
Introduction The incidence of blindness due to methanol intoxication is higher in males of productive age. The management of methanol-induced toxic optic neuropathy is yet to produce satisfactory results. Antioxidant therapy is now used as an alternative method of preventing methanol intoxication. The aim of this study was to observe the effect of TEMPOL (4-hydroxy-2,2,6,6-tetramethylpiperidinyl-1-oxyl), a superoxide dismutase (SOD) mimetic, on retinal ganglion cells in methanol-intoxicated rats. Methods This experimental study was conducted with 20 male Wistar rats that were 10–12 weeks old and weighed 300–350 g. The rats were divided into four groups that each received a different treatment: a negative control group, a positive control group, a methanol group, and a methanol + TEMPOL group. Enucleated eyes from all groups were sliced and stained using hematoxylin–eosin (HE). Retinal layer and ganglion cells were assessed based on cellular structure, cellular swelling, and vacuole formation in the ganglion cell layer as observed at × 200 magnification. The Kruskal–Wallis test and the Mann–Whitney test were used, with significance taken to correspond to p < 0.05. Results Retinal ganglion cells of the control group had fewer vacuoles and a more well-organized cellular structure compared to those of the methanol group. The histopathologic scores of the methanol-intoxicated group were lower than those of the TEMPOL therapy group; p = 0.011 (i.e., p < 0.05). Conclusions TEMPOL had a positive impact on the cellular structure of retinal ganglion cells in methanol-intoxicated rats.
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Bollaerts I, Veys L, Geeraerts E, Andries L, De Groef L, Buyens T, Salinas-Navarro M, Moons L, Van Hove I. Complementary research models and methods to study axonal regeneration in the vertebrate retinofugal system. Brain Struct Funct 2017; 223:545-567. [DOI: 10.1007/s00429-017-1571-3] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2017] [Accepted: 11/15/2017] [Indexed: 01/18/2023]
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Jang H, Srichayet P, Park WJ, Heo HJ, Kim DO, Tongchitpakdee S, Kim TJ, Jung SH, Lee CY. Phyllanthus emblica L. (Indian gooseberry) extracts protect against retinal degeneration in a mouse model of amyloid beta-induced Alzheimer’s disease. J Funct Foods 2017. [DOI: 10.1016/j.jff.2017.07.056] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022] Open
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Electrical brain stimulation induces dendritic stripping but improves survival of silent neurons after optic nerve damage. Sci Rep 2017; 7:627. [PMID: 28377608 PMCID: PMC5428431 DOI: 10.1038/s41598-017-00487-z] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2016] [Accepted: 02/27/2017] [Indexed: 12/29/2022] Open
Abstract
Repetitive transorbital alternating current stimulation (rtACS) improves vision in patients with chronic visual impairments and an acute treatment increased survival of retinal neurons after optic nerve crush (ONC) in rodent models of visual system injury. However, despite this protection no functional recovery could be detected in rats, which was interpreted as evidence of “silent survivor” cells. We now analysed the mechanisms underlying this “silent survival” effect. Using in vivo microscopy of the retina we investigated the survival and morphology of fluorescent neurons before and after ONC in animals receiving rtACS or sham treatment. One week after the crush, more neurons survived in the rtACS-treated group compared to sham-treated controls. In vivo imaging further revealed that in the initial post-ONC period, rtACS induced dendritic pruning in surviving neurons. In contrast, dendrites in untreated retinae degenerated slowly after the axonal trauma and neurons died. The complete loss of visual evoked potentials supports the hypothesis that cell signalling is abolished in the surviving neurons. Despite this evidence of “silencing”, intracellular free calcium imaging showed that the cells were still viable. We propose that early after trauma, complete dendritic stripping following rtACS protects neurons from excitotoxic cell death by silencing them.
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Acharya S, Rogers P, Krishnamoorthy RR, Stankowska DL, Dias HR, Yorio T. Design and synthesis of novel hybrid sydnonimine and prodrug useful for glaucomatous optic neuropathy. Bioorg Med Chem Lett 2016; 26:1490-4. [DOI: 10.1016/j.bmcl.2015.12.030] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2015] [Revised: 12/03/2015] [Accepted: 12/10/2015] [Indexed: 01/12/2023]
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Skowronska-Krawczyk D, Zhao L, Zhu J, Weinreb RN, Cao G, Luo J, Flagg K, Patel S, Wen C, Krupa M, Luo H, Ouyang H, Lin D, Wang W, Li G, Xu Y, Li O, Chung C, Yeh E, Jafari M, Ai M, Zhong Z, Shi W, Zheng L, Krawczyk M, Chen D, Shi C, Zin C, Zhu J, Mellon PL, Gao W, Abagyan R, Zhang L, Sun X, Zhong S, Zhuo Y, Rosenfeld MG, Liu Y, Zhang K. P16INK4a Upregulation Mediated by SIX6 Defines Retinal Ganglion Cell Pathogenesis in Glaucoma. Mol Cell 2015; 59:931-40. [PMID: 26365380 DOI: 10.1016/j.molcel.2015.07.027] [Citation(s) in RCA: 61] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2015] [Revised: 06/08/2015] [Accepted: 07/24/2015] [Indexed: 02/06/2023]
Abstract
Glaucoma, a blinding neurodegenerative disease, whose risk factors include elevated intraocular pressure (IOP), age, and genetics, is characterized by accelerated and progressive retinal ganglion cell (RGC) death. Despite decades of research, the mechanism of RGC death in glaucoma is still unknown. Here, we demonstrate that the genetic effect of the SIX6 risk variant (rs33912345, His141Asn) is enhanced by another major POAG risk gene, p16INK4a (cyclin-dependent kinase inhibitor 2A, isoform INK4a). We further show that the upregulation of homozygous SIX6 risk alleles (CC) leads to an increase in p16INK4a expression, with subsequent cellular senescence, as evidenced in a mouse model of elevated IOP and in human POAG eyes. Our data indicate that SIX6 and/or IOP promotes POAG by directly increasing p16INK4a expression, leading to RGC senescence in adult human retinas. Our study provides important insights linking genetic susceptibility to the underlying mechanism of RGC death and provides a unified theory of glaucoma pathogenesis.
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Affiliation(s)
- Dorota Skowronska-Krawczyk
- Shiley Eye Institute, Department of Ophthalmology and Institute of Engineering in Medicine, University of California, San Diego, La Jolla, CA 92093, USA
| | - Ling Zhao
- Shiley Eye Institute, Department of Ophthalmology and Institute of Engineering in Medicine, University of California, San Diego, La Jolla, CA 92093, USA; State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University, Guangzhou 510060, China
| | - Jie Zhu
- Shiley Eye Institute, Department of Ophthalmology and Institute of Engineering in Medicine, University of California, San Diego, La Jolla, CA 92093, USA; Department of Ophthalmology, Xijing Hospital, Fourth Military Medical University, Xi'an 710032, China
| | - Robert N Weinreb
- Shiley Eye Institute, Department of Ophthalmology and Institute of Engineering in Medicine, University of California, San Diego, La Jolla, CA 92093, USA
| | - Guiqun Cao
- Molecular Medicine Research Center, State Key Laboratory of Biotherapy, West China Hospital, Sichuan University, Sichuan 610041, China
| | - Jing Luo
- Shiley Eye Institute, Department of Ophthalmology and Institute of Engineering in Medicine, University of California, San Diego, La Jolla, CA 92093, USA
| | - Ken Flagg
- Shiley Eye Institute, Department of Ophthalmology and Institute of Engineering in Medicine, University of California, San Diego, La Jolla, CA 92093, USA
| | - Sherrina Patel
- Shiley Eye Institute, Department of Ophthalmology and Institute of Engineering in Medicine, University of California, San Diego, La Jolla, CA 92093, USA
| | - Cindy Wen
- Shiley Eye Institute, Department of Ophthalmology and Institute of Engineering in Medicine, University of California, San Diego, La Jolla, CA 92093, USA
| | - Martin Krupa
- Shiley Eye Institute, Department of Ophthalmology and Institute of Engineering in Medicine, University of California, San Diego, La Jolla, CA 92093, USA
| | - Hongrong Luo
- Shiley Eye Institute, Department of Ophthalmology and Institute of Engineering in Medicine, University of California, San Diego, La Jolla, CA 92093, USA
| | - Hong Ouyang
- Shiley Eye Institute, Department of Ophthalmology and Institute of Engineering in Medicine, University of California, San Diego, La Jolla, CA 92093, USA; State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University, Guangzhou 510060, China
| | - Danni Lin
- Shiley Eye Institute, Department of Ophthalmology and Institute of Engineering in Medicine, University of California, San Diego, La Jolla, CA 92093, USA
| | - Wenqiu Wang
- Shiley Eye Institute, Department of Ophthalmology and Institute of Engineering in Medicine, University of California, San Diego, La Jolla, CA 92093, USA; Department of Ophthalmology, Shanghai First People's Hospital, School of Medicine, Shanghai JiaoTong University, Shanghai 20080, China
| | - Gen Li
- Molecular Medicine Research Center, State Key Laboratory of Biotherapy, West China Hospital, Sichuan University, Sichuan 610041, China
| | - Yanxin Xu
- Molecular Medicine Research Center, State Key Laboratory of Biotherapy, West China Hospital, Sichuan University, Sichuan 610041, China
| | - Oulan Li
- Molecular Medicine Research Center, State Key Laboratory of Biotherapy, West China Hospital, Sichuan University, Sichuan 610041, China; Guangzhou KangRui Biological Pharmaceutical Technology Company Ltd., Guangzhou 510005, China
| | - Christopher Chung
- Shiley Eye Institute, Department of Ophthalmology and Institute of Engineering in Medicine, University of California, San Diego, La Jolla, CA 92093, USA
| | - Emily Yeh
- Shiley Eye Institute, Department of Ophthalmology and Institute of Engineering in Medicine, University of California, San Diego, La Jolla, CA 92093, USA
| | - Maryam Jafari
- Shiley Eye Institute, Department of Ophthalmology and Institute of Engineering in Medicine, University of California, San Diego, La Jolla, CA 92093, USA
| | - Michael Ai
- Shiley Eye Institute, Department of Ophthalmology and Institute of Engineering in Medicine, University of California, San Diego, La Jolla, CA 92093, USA
| | - Zheng Zhong
- State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University, Guangzhou 510060, China
| | - William Shi
- Shiley Eye Institute, Department of Ophthalmology and Institute of Engineering in Medicine, University of California, San Diego, La Jolla, CA 92093, USA
| | - Lianghong Zheng
- Guangzhou KangRui Biological Pharmaceutical Technology Company Ltd., Guangzhou 510005, China
| | - Michal Krawczyk
- Shiley Eye Institute, Department of Ophthalmology and Institute of Engineering in Medicine, University of California, San Diego, La Jolla, CA 92093, USA
| | - Daniel Chen
- Shiley Eye Institute, Department of Ophthalmology and Institute of Engineering in Medicine, University of California, San Diego, La Jolla, CA 92093, USA
| | - Catherine Shi
- Shiley Eye Institute, Department of Ophthalmology and Institute of Engineering in Medicine, University of California, San Diego, La Jolla, CA 92093, USA
| | - Carolyn Zin
- Shiley Eye Institute, Department of Ophthalmology and Institute of Engineering in Medicine, University of California, San Diego, La Jolla, CA 92093, USA
| | - Jin Zhu
- Shiley Eye Institute, Department of Ophthalmology and Institute of Engineering in Medicine, University of California, San Diego, La Jolla, CA 92093, USA
| | - Pamela L Mellon
- Department of Reproductive Medicine, University of California, San Diego, La Jolla, CA 92093, USA
| | - Weiwei Gao
- Department of Nanoengineering, University of California, San Diego, La Jolla, CA 92093, USA
| | - Ruben Abagyan
- Shiley Eye Institute, Department of Ophthalmology and Institute of Engineering in Medicine, University of California, San Diego, La Jolla, CA 92093, USA
| | - Liangfang Zhang
- Department of Nanoengineering, University of California, San Diego, La Jolla, CA 92093, USA
| | - Xiaodong Sun
- Department of Ophthalmology, Shanghai First People's Hospital, School of Medicine, Shanghai JiaoTong University, Shanghai 20080, China
| | - Sheng Zhong
- Institute for Genomic Medicine, University of California, San Diego, La Jolla, CA 92093, USA
| | - Yehong Zhuo
- State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University, Guangzhou 510060, China
| | - Michael G Rosenfeld
- Howard Hughes Medical Institute, School of Medicine, University of California, San Diego, La Jolla, CA 92093, USA
| | - Yizhi Liu
- State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University, Guangzhou 510060, China.
| | - Kang Zhang
- Shiley Eye Institute, Department of Ophthalmology and Institute of Engineering in Medicine, University of California, San Diego, La Jolla, CA 92093, USA; State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University, Guangzhou 510060, China; Molecular Medicine Research Center, State Key Laboratory of Biotherapy, West China Hospital, Sichuan University, Sichuan 610041, China; Institute for Genomic Medicine, University of California, San Diego, La Jolla, CA 92093, USA; Veterans Administration Healthcare System, San Diego, CA 92093, USA.
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Zhang QL, Wang W, Li J, Tian SY, Zhang TZ. Decreased miR-187 induces retinal ganglion cell apoptosis through upregulating SMAD7 in glaucoma. Biomed Pharmacother 2015; 75:19-25. [PMID: 26463627 DOI: 10.1016/j.biopha.2015.08.028] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2015] [Accepted: 08/13/2015] [Indexed: 12/20/2022] Open
Abstract
BACKGROUND Retinal ganglion cells (RGCs) are commonly experienced optic nerve diseases including glaucoma-induced injury that results in decrease of cell survival. However, the underlying mechanism remains to be elaborated. This present study was to focus on the miR-187 and Transforming growth factor-β (TGF-β) signal and investigated their roles in RGCs apoptosis and proliferation. METHODS RGC-5 retinal ganglion cell line was chose in present study and subjected to miR-187 mimic or inhibitor transfection. Cell apoptosis was evaluated using flow cytometry-based Annexin V-PI assay. Cell proliferation was examined using CCK-8. Protein levels of Smad2/3/7 were determined using western blotting. RESULTS miR-187 negatively regulated cell survival via inhibiting cell apoptosis and promoting cell proliferation. We observed that alteration expression of miR-187 is closely related to phosphorylation levels of Smad2 and Smad3. This correlation is associated with down-regulation of Smad7 induced by miR-187 via targeting Smad7 3'-UTR. From result of co-transfection of Smad7-plasmid and miR-187 mimic or siSmad7 and miR-187 inhibitor, we concluded that cell proliferation and apoptosis was mediated by miR-187/Smad7 axis. CONCLUSION In summary, cell internal signal transduction, miR-187 regulating Smad7 expression, plays a vital role in retinal ganglion cell survival.
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Affiliation(s)
- Qiu-Li Zhang
- Department of Ophthalmology, Affiliated Hospital of Inner Mongolia University for the Nationalities, No. 1742, HuoLinHe Street, Tongliao, Neimenggu 028050, China
| | - Wei Wang
- Department of Ophthalmology, Tongliao City Hospital, No. 668, KeErQin Street, Tongliao, Neimenggu 028000, China
| | - Jin Li
- Department of Infusion Center, The Children's Hospital of Changchun City, No.1321, Beian Road Kuancheng District, Changchun, Jilin 130000, China
| | - Shi-Yuan Tian
- Department of Ophthalmology, Affiliated Hospital of Inner Mongolia University for the Nationalities, No. 1742, HuoLinHe Street, Tongliao, Neimenggu 028050, China.
| | - Tian-Zi Zhang
- Department of Ophthalmology, Affiliated Hospital of Inner Mongolia University for the Nationalities, No. 1742, HuoLinHe Street, Tongliao, Neimenggu 028050, China.
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Xia X, Wen R, Chou TH, Li Y, Wang Z, Porciatti V. Protection of pattern electroretinogram and retinal ganglion cells by oncostatin M after optic nerve injury. PLoS One 2014; 9:e108524. [PMID: 25243471 PMCID: PMC4171539 DOI: 10.1371/journal.pone.0108524] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2014] [Accepted: 09/01/2014] [Indexed: 12/25/2022] Open
Abstract
Injury to retinal ganglion cell (RGC) axons leads to selective loss of RGCs and vision. Previous studies have shown that exogenous neurotrophic factors promote RGC survival. We investigated the neuroprotective effects of oncostatin M (OSM), a member of the IL-6 family of cytokines, on pattern electroretinogram (PERG) and RGC survival after optic nerve crush (ON-crush) in the mouse. BALB/C mice received ON-crush in the left eyes for either 4-second or 1-second duration (4-s or 1-s). Fluoro-gold retrograde labeling was used to identify RGCs. RGC function was assessed by PERG measurement. OSM or CNTF protein was injected intravitreally immediately after ON-crush. OSM responsive cells were identified by localization of increased STAT3 phosphorylation. Significant higher RGC survival (46% of untreated control) was seen in OSM-treated eyes when assessed 2 weeks after 4-s ON-crush as compared to that (14% of untreated control) of the PBS-treated eyes (P<0.001). In addition, PERG amplitude was significantly higher in eyes treated with OSM or CNTF 1 week after 1-s ON-crush (36% of baseline) as compared with the amplitude of PBS-treated eyes (19% of the baseline, P = 0.003). An increase in STAT3 phosphorylation was localized in Müller layer after OSM treatment, suggesting that Müller cells mediate the effect of OSM. Our results demonstrate that one single injection of either OSM or CNTF after ON-crush improves RGC survival together with their electrophysiological activity. These data provide proof-of-concept for using neurotrophic factors OSM and CNTF for RGC degenerative diseases, including glaucoma and acute optic nerve trauma.
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Affiliation(s)
- Xin Xia
- Bascom Palmer Eye Institute, University of Miami, Miller School of Medicine, Miami, Florida, United States of America
- Department of Ophthalmology, Shanghai First People’s Hospital, Jiaotong University, Shanghai, China
- Shanghai Key Laboratory for Ocular Fundus Diseases, Shanghai, China
| | - Rong Wen
- Bascom Palmer Eye Institute, University of Miami, Miller School of Medicine, Miami, Florida, United States of America
| | - Tsung-Han Chou
- Bascom Palmer Eye Institute, University of Miami, Miller School of Medicine, Miami, Florida, United States of America
| | - Yiwen Li
- Bascom Palmer Eye Institute, University of Miami, Miller School of Medicine, Miami, Florida, United States of America
| | - Zhengying Wang
- Bascom Palmer Eye Institute, University of Miami, Miller School of Medicine, Miami, Florida, United States of America
| | - Vittorio Porciatti
- Bascom Palmer Eye Institute, University of Miami, Miller School of Medicine, Miami, Florida, United States of America
- * E-mail:
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