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Noguchi JL, Seu MY, Qiao JB, Tan IR, Swaminathan SR, McDonnell JF, Tan Z, Bu P. Kaempferol Protects Against Retinal Photoreceptor Degeneration in a Mouse Model of Light-Induced Retinal Injury. J Ocul Pharmacol Ther 2023; 39:80-85. [PMID: 36520599 DOI: 10.1089/jop.2022.0128] [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: 12/23/2022] Open
Abstract
Purpose: Age-related macular degeneration (AMD) is a leading cause of blindness in developed countries with little in the way of treatment that prevents progression to end-stage disease. Kaempferol (KF) is a plant-derived dietary flavonoid that has demonstrated as a strong antioxidant showing neuroprotection in stroke models. We hypothesize that KF has protective effects against retinal degeneration and may serve as a therapeutic agent against AMD. Methods: BALB/c albino mice were assigned to 1 of 2 groups: control-treated or KF-treated retinal light injury mice. Mice were exposed to 8,000 lux cool white fluorescent light for 2 h to induce light injury. Control or KF was injected intraperitoneally after light injury for 5 days. Scotopic electroretinography (ERG) was recorded before light injury and 7 days after light injury. The retinal morphology and terminal deoxynucleotidyl transferase dUTP nick end labeling (TUNEL) assays were performed after light injury. Results: ERG a- and b-wave amplitudes were significantly reduced in the retinal light injury group compared with the nonretinal light injury group. Retinal light injury produced markedly thinning of the outer nuclear layer along with significant TUNEL-positive signals. In contrast KF treatments significantly attenuated reduction of ERG a- and b- wave amplitudes and the loss of the outer nuclear layer. Conclusions: KF protects retinal photoreceptors and preserves retinal function against retinal degeneration caused by light injury. These initial findings suggest that KF may represent a novel therapy for retinal degenerative conditions such as AMD.
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Affiliation(s)
- Jonathan L Noguchi
- Department of Ophthalmology, Stritch School of Medicine, Loyola University Chicago, Maywood, Illinois, USA
| | - Michelle Y Seu
- Stritch School of Medicine, Loyola University Chicago, Maywood, Illinois, USA
| | - James B Qiao
- Stritch School of Medicine, Loyola University Chicago, Maywood, Illinois, USA
| | - Ivy R Tan
- Institute for Memory Impairments and Neurological Disorders, University of California, Irvine, California, USA
| | - Selina R Swaminathan
- Department of Ophthalmology, Stritch School of Medicine, Loyola University Chicago, Maywood, Illinois, USA
| | - James F McDonnell
- Department of Ophthalmology, Stritch School of Medicine, Loyola University Chicago, Maywood, Illinois, USA
| | - Zhiqun Tan
- Institute for Memory Impairments and Neurological Disorders, University of California, Irvine, California, USA
| | - Ping Bu
- Department of Ophthalmology, Stritch School of Medicine, Loyola University Chicago, Maywood, Illinois, USA.,Research Service, Edward Hines Jr. VA Hospital, Hines, Illinois, USA
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Vittal R, Fisher AJ, Thompson EL, Cipolla EM, Gu H, Mickler EA, Varre A, Agarwal M, Kim KK, Vasko MR, Moore BB, Lama VN. Overexpression of Decay Accelerating Factor Mitigates Fibrotic Responses to Lung Injury. Am J Respir Cell Mol Biol 2022; 67:459-470. [PMID: 35895592 PMCID: PMC9564933 DOI: 10.1165/rcmb.2021-0463oc] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
CD55 or decay accelerating factor (DAF), a ubiquitously expressed glycosylphosphatidylinositol (GPI)-anchored protein, confers a protective threshold against complement dysregulation which is linked to the pathogenesis of idiopathic pulmonary fibrosis (IPF). Since lung fibrosis is associated with downregulation of DAF, we hypothesize that overexpression of DAF in fibrosed lungs will limit fibrotic injury by restraining complement dysregulation. Normal primary human alveolar type II epithelial cells (AECs) exposed to exogenous complement 3a or 5a, and primary AECs purified from IPF lungs demonstrated decreased membrane-bound DAF expression with concurrent increase in the endoplasmic reticulum (ER) stress protein, ATF6. Increased loss of extracellular cleaved DAF fragments was detected in normal human AECs exposed to complement 3a or 5a, and in lungs of IPF patients. C3a-induced ATF6 expression and DAF loss was inhibited using pertussis toxin (an enzymatic inactivator of G-protein coupled receptors), in murine AECs. Treatment with soluble DAF abrogated tunicamycin-induced C3a secretion and ER stress (ATF6 and BiP expression) and restored epithelial cadherin. Bleomycin-injured fibrotic mice subjected to lentiviral overexpression of DAF demonstrated diminished levels of local collagen deposition and complement activation. Further analyses showed diminished release of DAF fragments, as well as reduction in apoptosis (TUNEL and caspase 3/7 activity), and ER stress-related transcripts. Loss-of-function studies using Daf1 siRNA demonstrated worsened lung fibrosis detected by higher mRNA levels of Col1a1 and epithelial injury-related Muc1 and Snai1, with exacerbated local deposition of C5b-9. Our studies provide a rationale for rescuing fibrotic lungs via DAF induction that will restrain complement dysregulation and lung injury.
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Affiliation(s)
- Ragini Vittal
- Division of Pulmonary and Critical Care, Department of Internal Medicine and
| | - Amanda J. Fisher
- Division of Pulmonary and Critical Care, Department of Medicine and
| | - Eric L. Thompson
- Department of Pharmacology, Indiana University School of Medicine, Indianapolis, Indiana
| | - Ellyse M. Cipolla
- Division of Pulmonary and Critical Care, Department of Internal Medicine and
| | - Hongmei Gu
- Division of Pulmonary and Critical Care, Department of Medicine and
| | | | - Ananya Varre
- Division of Pulmonary and Critical Care, Department of Internal Medicine and
| | - Manisha Agarwal
- Division of Pulmonary and Critical Care, Department of Internal Medicine and
| | - Kevin K. Kim
- Division of Pulmonary and Critical Care, Department of Internal Medicine and
| | - Michael R. Vasko
- Department of Pharmacology, Indiana University School of Medicine, Indianapolis, Indiana
| | - Bethany B. Moore
- Department of Microbiology and Immunology, University of Michigan, Ann Arbor, Michigan; and
| | - Vibha N. Lama
- Division of Pulmonary and Critical Care, Department of Internal Medicine and
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3
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Song Q, Xie X, Hu Z, Xue J, Zhang S, Xie X. (Z)-7,4'-dimethoxy-6-hydroxy-aurone-4-O- β-glucopyranoside attenuates lipoteichoic acid-induced damage in rat cardiomyoblast cells. J Int Med Res 2021; 48:300060519889716. [PMID: 32865061 PMCID: PMC7469747 DOI: 10.1177/0300060519889716] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022] Open
Abstract
Objective Excessive inflammatory responses in the endocardium are related to progression of infectious endocarditis. This study aimed to investigate whether (Z)-7,4'-dimethoxy-6-hydroxy-aurone-4-O-β-glucopyranoside (DHAG), a compound isolated from the endophytic fungus Penicillium citrinum of Bruguiera gymnorrhiza, could attenuate cell damage caused by lipoteichoic acid (LTA) in embryonic rat heart cells (H9c2). Methods LTA-induced cell damage occurred in H9c2 cells and the protective effects of DHAG at different concentrations (1–10 µM) were assessed. Indicators of oxidative stress and inflammatory responses in H9c2 cells were measured. Results DHAG (1–10 µM) significantly attenuated LTA-induced damage in H9c2 cells, as evidenced by increased cell viability and mitochondrial membrane potential, decreased cytochrome c release and DNA fragmentation, inhibition of caspase-3 and -9 activity, and altered expression of apoptosis-related proteins. DHAG also decreased oxidative stress by increasing protein expression of nuclear factor (erythroid-derived 2)-like 2 (Nrf2). Furthermore, DHAG inhibited inflammatory responses by decreasing protein expression of nuclear factor kappa B (NF-κB) and mitogen-activated protein kinases (MAPKs). Conclusion DHAG exerted protective effects against LTA-induced cell damage, at least partially by decreasing oxidative stress and inhibiting inflammatory responses. Our results provide a scientific rational for developing DHAG as a therapy against infectious endocarditis.
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Affiliation(s)
- Qiang Song
- Department of Structural Heart Disease, the First Affiliated Hospital of Medical College, Xi'an Jiaotong University, Xi'an, China
| | - Xuegang Xie
- Department of Structural Heart Disease, the First Affiliated Hospital of Medical College, Xi'an Jiaotong University, Xi'an, China
| | - Zhi Hu
- Department of Structural Heart Disease, the First Affiliated Hospital of Medical College, Xi'an Jiaotong University, Xi'an, China
| | - Jianying Xue
- Department of Structural Heart Disease, the First Affiliated Hospital of Medical College, Xi'an Jiaotong University, Xi'an, China
| | - Songlin Zhang
- Department of Structural Heart Disease, the First Affiliated Hospital of Medical College, Xi'an Jiaotong University, Xi'an, China
| | - Xinming Xie
- Department of Respiratory and Critical Care Medicine, the First Affiliated Hospital of Medical College, Xi'an Jiaotong University, Xi'an, China
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4
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Wang YL, Zhang Y, Liu T, Cui J. 3,5-Dimethoxy-4-hydroxy myricanol attenuated oxidative stress-induced toxicity on cardiomyoblast cells. Hum Exp Toxicol 2021; 40:1485-1495. [PMID: 33729028 DOI: 10.1177/0960327121997977] [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] [Indexed: 12/22/2022]
Abstract
Myocardial ischemia is the main reason for ischemic heart diseases. Antioxidant treatment is considered as a possible approach to prevent myocardial ischemia injury, because oxidative stress is a key factor triggering it. This study was to investigate the protective effects of 3,5-dimethoxy-4-hydroxy myricanol (DHM) against oxidative stress-induced cytotoxicity on H9c2 cells and further explore its mechanisms. The oxidative stress and inflammatory response markers were detected by H2DCFDA fluorescent measurement, enzyme-linked immunosorbent assay (ELISA), real-time PCR and Western blot. Results showed DHM exerted inhibitory effects against H9c2 cell damage. Furthermore, DHM decreased oxidative stress in H9c2 cells through up-regulating protein expression of heme oxygenase-1 (HO-1) and nuclear factor (erythroid-derived 2)-like 2 (Nrf2). Moreover, DHM inhibited inflammatory responses through down-regulating the protein expression of mitogen-activated protein kinases (MAPKs) and nuclear factor kappa B (NF-κB). DHM exerted protective activities against oxidative stress-induced cell damage, at least through decreasing oxidative stress and inhibiting inflammatory responses, indicating that DHM have the potential to be developed as therapeutic agents for the treatment of myocardial ischemia.
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Affiliation(s)
- Y L Wang
- Department of Cardiology, The Second Hospital of Hebei Medical University, Shijiazhuang, China
| | - Y Zhang
- Department of Cardiology, The Second Hospital of Hebei Medical University, Shijiazhuang, China
| | - T Liu
- Department of Cardiology, The Second Hospital of Hebei Medical University, Shijiazhuang, China
| | - J Cui
- Department of Internal Medicine, Tianjin Port Hospital, Tianjin, China
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5
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Chen Y, Yang M, Wang ZJ. (Z)-7,4'-Dimethoxy-6-hydroxy-aurone-4-O-β-glucopyranoside mitigates retinal degeneration in Rd10 mouse model through inhibiting oxidative stress and inflammatory responses. Cutan Ocul Toxicol 2019; 39:36-42. [PMID: 31648555 DOI: 10.1080/15569527.2019.1685535] [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] [Indexed: 10/25/2022]
Abstract
Purpose: As an inherited retinal dystrophy characterised by progressive degeneration of photoreceptor cells, retinitis pigmentosa (RP) leads to partial or total blindness eventually. Possible causes of the photoreceptor cell death are oxidative stress and inflammatory responses. (Z)-7,4'-Dimethoxy-6-hydroxy-aurone-4-O-β-glucopyranoside (DHAG) is a novel compound with potent antioxidant properties. The aim of this study was to investigate whether DHAG could mitigate photoreceptor cell degeneration in an established mouse model of RP.Materials and method: Rd10 mice were treated with DHAG daily by gavage from postnatal day 12 (P12) to P33. Retinal morphology was evaluated by haematoxylin and eosin staining. Apoptosis-positive cells were detected by terminal deoxynucleotidyl transferase dUTP nick end labelling (TUNEL) assay. Oxidative stress markers and inflammatory factors were measured by enzyme-linked immunosorbent assay (ELISA). Real-time polymerase chain reaction, immunostaining and western blot were applied to measure the gene and protein change to explore the underlying mechanisms.Results: Results showed that DHAG significantly preserved the retinal morphology, reducing photoreceptor cell apoptosis, decreasing oxidative stress and inhibiting inflammatory responses in Rd10 mice. The mechanism might be related to inhibit the activation of P38 pathway.Conclusions: This study showed the beneficial effects of DHAG, a compound possessing antioxidant properties, and provided scientific rationale to develop DHAG as a potential agent to treat RP.
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Affiliation(s)
- You Chen
- Department of Ophthalmology, China-Japan Friendship Hospital, Beijing, People's Republic of China
| | - Ming Yang
- Beijing Tongren Eye Center, Beijing Tongren Hospital, Capital Medical University, Beijing, People's Republic of China
| | - Zhi-Jun Wang
- Department of Ophthalmology, China-Japan Friendship Hospital, Beijing, People's Republic of China
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6
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Zhang Z, Li R, Lu H, Zhang X. Systemic administration with tetrahydrocannabinol causes retinal damage in BALB/c mice. Hum Exp Toxicol 2019; 39:290-300. [PMID: 31680560 DOI: 10.1177/0960327119886037] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Recent years have seen substantial shifts in cultural attitudes towards cannabis for medical and recreational use. However, legalizing recreational marijuana may have adverse effects on individual and public health. As the most widely used illicit agent, cannabis is commonly reported to disrupt learning and memory. Unfortunately, the molecular mechanisms underlying behavioral impairment by cannabis abuse remain poorly understood. Tetrahydrocannabinol (THC), a major component in cannabis, causes short-term effects on the visual system, but little is known about persisting visual disturbances. This study was to investigate the effects of systemic administration with THC on retina and explore its underlying mechanisms. BALB/c mice were treated with 1 or 2 mg/kg THC intraperitoneally daily for 2 months, mice treated with vehicle as negative control. The retinal function was tested by electroretinography after THC treatment. Morphology and pathology changes of retina were detected by hematoxylin and eosin staining. Terminal deoxynucleotidyl transferase dUTP nick end labeling assay was used to detect the apoptosis in photoreceptor cells. Enzyme-linked immunosorbent assay was used to show the inflammatory responses and oxidative stress. mRNA and protein changes were measured by real-time polymerase chain reaction and Western blot to explore the underlying mechanisms. Results indicated that 2-month treatment with THC caused retinal damage, evidenced by its functional loss and increased apoptosis in photoreceptor cells through inducing inflammatory responses and oxidative stress. Our study demonstrated that systemic administration with THC caused toxic effects on retinas of BALB/c mice, suggesting the potential mechanisms for the retina damage caused by cannabis abuse.
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Affiliation(s)
- Z Zhang
- Ophthalmology Hospital, The First Affiliated Hospital of Harbin Medical University, Harbin, People's Republic of China
| | - R Li
- Ophthalmology Hospital, The First Affiliated Hospital of Harbin Medical University, Harbin, People's Republic of China
| | - H Lu
- Ophthalmology Hospital, The First Affiliated Hospital of Harbin Medical University, Harbin, People's Republic of China
| | - X Zhang
- Ophthalmology Hospital, The First Affiliated Hospital of Harbin Medical University, Harbin, People's Republic of China
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7
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Jiang H, Xu H. RETRACTED: Long-term systemic treatment with lysergic acid diethylamide causes retinal damage in CD1 mice. Hum Exp Toxicol 2019; 38:347-355. [PMID: 30472895 DOI: 10.1177/0960327118814162] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Affiliation(s)
- H Jiang
- Department of Ophthalmology, The First People's Hospital of Yunnan Province, Kunming, People's Republic of China
| | - H Xu
- Department of Ophthalmology, The First People's Hospital of Yunnan Province, Kunming, People's Republic of China
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8
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Yu M, Yan W, Beight C. Lutein and Zeaxanthin Isomers Reduce Photoreceptor Degeneration in the Pde6b rd10 Mouse Model of Retinitis Pigmentosa. BIOMED RESEARCH INTERNATIONAL 2018; 2018:4374087. [PMID: 30643804 PMCID: PMC6311858 DOI: 10.1155/2018/4374087] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/02/2018] [Accepted: 11/29/2018] [Indexed: 11/20/2022]
Abstract
PURPOSE Lutein, RR-zeaxanthin, and RS-zeaxanthin (L-Z) are antioxidants which can reduce endoplasmic reticulum stress (ERS) and oxidative stress (OS), and ameliorate neurodegenerative diseases. However, their treatment effect in the Pde6b rd10 (rd10) mouse model of retinitis pigmentosa (RP) and the underlying cellular mechanisms have not been studied. ERS is an important factor which causes photoreceptor apoptosis. The aim of the current project is to test the treatment effect of L-Z in rd10 mice and to investigate the underlying molecular mechanisms of ERS. METHODS L-Z (Lutemax 2020, 10 mg/kg) diluted in sunflower oil (SFO, 1 mg/ml) or the same volume of SFO was administrated via gavage from postnatal day 6 (P6) to P20 daily in L-Z group (n=5) or SFO group (n=6) of rd10 mice. At P21, electroretinography (ERG) was performed to show the functional change of retinas. 78 kDa glucose-regulated protein (GRP78) and endoplasmic reticulum protein 29 (ERp29) were tested by western blot and immunostaining. RESULTS The ERG amplitudes were larger in the L-Z group than those of the SFO group in all flash luminances of dark-adapted and light-adapted ERG (all p < 0.01). Western blot revealed that GRP78 in the retinas of the L-Z group was significantly downregulated compared to that of the SFO group (p < 0.01). Meanwhile, the retinal ERp29 protein was significantly upregulated in the L-Z treatment group than that of the SFO group (p < 0.01). CONCLUSIONS L-Z provide protection to the photoreceptors of rd10 mouse model of RP, which is probably associated with the reduction of ERS.
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Affiliation(s)
- Minzhong Yu
- Department of Ophthalmic Research, Cole Eye Institute, Cleveland Clinic Foundation, Cleveland, OH, USA
- Department of Ophthalmology, Cleveland Clinic Lerner College of Medicine of Case Western Reserve University, Cleveland, OH, USA
| | - Weiming Yan
- Department of Ophthalmic Research, Cole Eye Institute, Cleveland Clinic Foundation, Cleveland, OH, USA
- Department of Clinical Medicine, Faculty of Aerospace Medicine, Key Laboratory of Aerospace Medicine of the National Education Ministry, Fourth Military University, Xi'an, China
| | - Craig Beight
- Department of Ophthalmic Research, Cole Eye Institute, Cleveland Clinic Foundation, Cleveland, OH, USA
- Louis Stokes Cleveland Veterans Affairs Medical Center, Cleveland, OH, USA
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Murinello S, Usui Y, Sakimoto S, Kitano M, Aguilar E, Friedlander HM, Schricker A, Wittgrove C, Wakabayashi Y, Dorrell MI, Westenskow PD, Friedlander M. miR-30a-5p inhibition promotes interaction of Fas + endothelial cells and FasL + microglia to decrease pathological neovascularization and promote physiological angiogenesis. Glia 2018; 67:332-344. [PMID: 30484883 DOI: 10.1002/glia.23543] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2018] [Revised: 09/05/2018] [Accepted: 09/05/2018] [Indexed: 12/18/2022]
Abstract
Ischemia-induced angiogenesis contributes to various neuronal and retinal diseases, and often results in neurodegeneration and visual impairment. Current treatments involve the use of anti-VEGF agents but are not successful in all cases. In this study we determined that miR-30a-5p is another important mediator of retinal angiogenesis. Using a rodent model of ischemic retinopathy, we show that inhibiting miR-30a-5p reduces neovascularization and promotes tissue repair, through modulation of microglial and endothelial cell cross-talk. miR-30a-5p inhibition results in increased expression of the death receptor Fas and CCL2, to decrease endothelial cell survival and promote microglial migration and phagocytic function in focal regions of ischemic injury. Our data suggest that miR-30a-5p inhibition accelerates tissue repair by enhancing FasL-Fas crosstalk between microglia and endothelial cells, to promote endothelial cell apoptosis and removal of dead endothelial cells. Finally, we found that miR-30a levels were increased in the vitreous of patients with proliferative diabetic retinopathy. Our study identifies a role for miR-30a in the pathogenesis of neovascular retinal disease by modulating microglial and endothelial cell function, and suggests it may be a therapeutic target to treat ischemia-mediated conditions.
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Affiliation(s)
- Salome Murinello
- Department of Molecular Medicine, The Scripps Research Institute, California
| | - Yoshihiko Usui
- Department of Ophthalmology, Tokyo Medical University, Tokyo, Japan
| | - Susumu Sakimoto
- Department of Molecular Medicine, The Scripps Research Institute, California
| | - Maki Kitano
- Department of Molecular Medicine, The Scripps Research Institute, California
| | - Edith Aguilar
- Department of Molecular Medicine, The Scripps Research Institute, California
| | - H Maura Friedlander
- Department of Molecular Medicine, The Scripps Research Institute, California
| | - Amelia Schricker
- Department of Molecular Medicine, The Scripps Research Institute, California
| | - Carli Wittgrove
- Department of Molecular Medicine, The Scripps Research Institute, California
| | | | - Michael I Dorrell
- Department of Molecular Medicine, The Scripps Research Institute, California.,The Lowy Medical Research Institute, California.,Department of Biology, Point Loma Nazarene University, San Diego, California
| | - Peter D Westenskow
- Department of Molecular Medicine, The Scripps Research Institute, California
| | - Martin Friedlander
- Department of Molecular Medicine, The Scripps Research Institute, California.,The Lowy Medical Research Institute, California
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Lv XF, Tao LM, Zhong H. Long-term systemic administration with low dose of 3,4-methylenedioxymethamphetamine causes photoreceptor cell damage in CD1 mice. Cutan Ocul Toxicol 2018; 38:81-87. [PMID: 30360644 DOI: 10.1080/15569527.2018.1539007] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
OBJECTIVE As a powerful psychostimulant with high potential for abuse, 3,4-methylenedioxymethamphetamine (MDMA) causes long-lasting neurotoxicity. This study was to investigate the effects of systemic administration of MDMA on retinal damage in CD1 mice and its underlying mechanisms. MATERIAL AND METHODS CD1 mice were randomly divided into two groups (n = 10): group 1 receiving PBS by intraperitoneal injection daily; group 2 receiving 2 mg/kg MDMA by intraperitoneal injection daily for 3 months. The retinal function was tested by electroretinography (ERG). The retinal morphology and histology was evaluated by Toluidine blue staining and TUNEL assay, respectively. Inflammatory cytokines were measured by ELISA assays. Gene and protein expression was detected by real-time PCR and western blot. RESULTS Results demonstrated that retinal damage was caused by MDMA after 3-month treatment, evidenced by retinal dysfunction through photoreceptor cell apoptosis induced by inflammatory response and oxidative stress. CONCLUSION Our study indicated that systemic administration of MDMA increased inflammatory response in photoreceptor cells to cause retinal dysfunction on CD1 mice, providing the scientific rationale for the photoreceptor cell damage caused by the MDMA abuse.
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Affiliation(s)
- Xiu-Fang Lv
- a Department of Ophthalmology , the Second Hospital Affiliated to Anhui Medical University , Hefei , People's Republic of China
| | - Li-Ming Tao
- a Department of Ophthalmology , the Second Hospital Affiliated to Anhui Medical University , Hefei , People's Republic of China
| | - Hui Zhong
- b Department of Ophthalmology , Shenzhen Children's Hospital , Shenzhen , People's Republic of China
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Wang YY, Wang CG, Qi SN, Liu ZX, Su GF, Zheng YJ. 3,5-Dimethoxy-4-hydroxy myricanol ameliorates photoreceptor cell degeneration in Pde6b rd10 mouse model. Cutan Ocul Toxicol 2018; 38:36-43. [PMID: 30079774 DOI: 10.1080/15569527.2018.1508153] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
Abstract
INTRODUCTION Retinitis pigmentosa (RP) caused by the photoreceptor cell degeneration is currently incurable and leads to partial or complete blindness eventually. 3,5-dimethoxy-4-hydroxy myricanol (DM) is a novel compound isolated from the leaves of Micromelum integerrimum, with proliferative activities on NIH3T3 cells. This study was to investigate whether DM could mitigate retinal degeneration of rd10 mice, a well-characterized mouse model of RP. MATERIALS AND METHOD Rd10 mice were treated with DM daily by intraperitoneal injection from postnatal day 12 (P12) to P26. Electroretinography (ERG) reflects the mass response of photoreceptor cells and was used to test the outer retinal function after DM treatment. Haematoxylin and Eosin staining was used to show the retinal morphology and evaluate the rod photoreceptor cell loss. TUNEL assay was used to detect the apoptosis-positive cells. Inflammatory factors were measured by ELISA to show the inflammatory response. Real-time PCR and western blot were applied to measure the gene and protein change to explore the underlying mechanisms. RESULTS Results showed that DM significantly improved the retinal function by increasing the ERG amplitude, preserving the retinal morphology, reducing photoreceptor cell apoptosis, decreasing inflammatory response, and inhibiting endoplasmic reticulum stress in rd10 mice. CONCLUSION This is the first time when the protective effects of DM against photoreceptor cell degeneration of rd10 mice have been demonstrated, providing scientific rationale to develop DM as a potential agent to treat RP.
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Affiliation(s)
- Yan-Yan Wang
- a Department of Ophthalmology , Second Hospital of Jilin University, Jilin University , Changchun , People's Republic of China.,b Department of Ophthalmology , Qianwei Hospital of Jilin Province , Changchun , People's Republic of China
| | - Chen-Guang Wang
- a Department of Ophthalmology , Second Hospital of Jilin University, Jilin University , Changchun , People's Republic of China
| | - Shou-Nan Qi
- a Department of Ophthalmology , Second Hospital of Jilin University, Jilin University , Changchun , People's Republic of China
| | - Zao-Xia Liu
- a Department of Ophthalmology , Second Hospital of Jilin University, Jilin University , Changchun , People's Republic of China
| | - Guan-Fang Su
- a Department of Ophthalmology , Second Hospital of Jilin University, Jilin University , Changchun , People's Republic of China
| | - Ya-Juan Zheng
- a Department of Ophthalmology , Second Hospital of Jilin University, Jilin University , Changchun , People's Republic of China
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Hu SL, Zheng CP. (3R)-5,6,7-trihydroxy-3-isopropyl-3-methylisochroman-1-one ameliorates retinal degeneration in Pde6b rd10 mice. Cutan Ocul Toxicol 2018; 37:245-251. [PMID: 29480079 DOI: 10.1080/15569527.2018.1441863] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
As a severe photoreceptor-degenerative disease, retinitis pigmentosa (RP) is currently incurable and eventually leads to partial or complete blindness. (3R)-5,6,7-trihydroxy-3-isopropyl-3-methylisochroman-1-one (TIM) is a novel antioxidant isolated from the plant of Alpinia katsumadai Hayata, with protective effects on photoreceptor cells against lipoteichoic acid-induced damage through inhibiting oxidative stress. The present study was to further demonstrate whether TIM could ameliorate retinal degeneration of Pde6brd10 (rd10) mice, a mouse model of RP. rd10 mice were treated with TIM by intraperitoneal injection daily from postnatal Day 10 (P10) to P26. Retinal function was tested by electroretinography. Histology was evaluated by toluidine blue staining and TUNEL assay. Oxidative stress markers were measured by ELISA. Immunohistochemistry, real-time PCR, and western blotting were applied to explore the protective mechanism. Results showed TIM significantly improved the retinal function and decreased photoreceptor cell apoptosis in rd10 mice through reducing oxidative stress. For the first time, this study demonstrated the protective effects of TIM against retinal degeneration in rd10 mice, providing scientific rationale to use TIM treating the RP.
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Affiliation(s)
- Shou-Long Hu
- a Department of Ophthalmology , Beijing Children's Hospital, Capital Medical University , Beijing , P.R China
| | - Chao-Pan Zheng
- b Department of Otorhinolaryngology , Shenzhen People's Hospital , Shenzhen , P. R China
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13
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(3R)-5,6,7-trihydroxy-3-isopropyl-3-methylisochroman-1-one reduces lipoteichoic acid-induced damage in rat cardiomyoblast cells. Anatol J Cardiol 2018. [PMID: 29521314 PMCID: PMC5864770 DOI: 10.14744/anatoljcardiol.2018.71542] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
Abstract
Objective: Infective endocarditis is usually caused by Streptococcus sanguinis and characterized by inflammatory responses in the endocardium. This study aimed to investigate if the new compound (3R)-5,6,7-trihydroxy-3-isopropyl-3-methylisochroman-1-one (TIM) isolated from Alpinia katsumadai Hayata could provide protection against lipoteichoic acid (LTA)-induced cell damage in embryonic rat heart cells (H9c2). Methods: LTA-induced cell damage was established in H9c2, and the protective effects of TIM against the cell damage were examined at different concentrations (0.1–2.5 µM). The inflammatory response and oxidative stress in H9c2 cells were also measured. Results: Treatment with TIM (0.1–2.5 µM) significantly decreased LTA-induced toxicity in H9c2 cells, which was indicated by increase in cell viability, elevation in the mitochondrial membrane potential, decrease in the release of cytochrome-c and DNA damage, inhibition of caspase-3/9 activities, and change in apoptosis-related protein expression in LTA-treated H9c2 cells. TIM treatment also significantly attenuated the redox imbalance in H9c2 cells by decreasing malondialdehyde and intracellular reactive oxygen species levels as well as by enhancing superoxide dismutase activities and glutathione levels by increasing nuclear factor (erythroid-derived 2)-like 2 protein expression. Moreover, TIM treatment decreased interleukin 1 β, interleukin 12, and tumor necrosis factor α levels by inhibiting nuclear factor kappa B protein expression. Conclusion: Our data indicated that TIM protected H9c2 cells against LTA-induced toxicity, at least partially through inhibiting the inflammatory response and oxidative stress, providing scientific rational to develop TIM to treat infective endocarditis.
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Hu QD, Xu LL, Gong Y, Wu GH, Wang YW, Wu SJ, Zhang Z, Mao W, Zhou YS, Li QB, Yuan JS. Lysergic acid diethylamide causes photoreceptor cell damage through inducing inflammatory response and oxidative stress. Cutan Ocul Toxicol 2018; 37:233-239. [PMID: 29298533 DOI: 10.1080/15569527.2018.1423620] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Qi-Di Hu
- Department of Ophthalmology, Ophthalmology Hospital of Ningbo, Ningbo, People’s Republic of China
| | - Ling-Li Xu
- Department of Ophthalmology, Ophthalmology Hospital of Ningbo, Ningbo, People’s Republic of China
| | - Yan Gong
- Department of Ophthalmology, Ophthalmology Hospital of Ningbo, Ningbo, People’s Republic of China
| | - Guo-Hai Wu
- Department of Ophthalmology, Ophthalmology Hospital of Ningbo, Ningbo, People’s Republic of China
| | - Yu-Wen Wang
- Department of Ophthalmology, Ophthalmology Hospital of Ningbo, Ningbo, People’s Republic of China
| | - Shan-Jun Wu
- Department of Ophthalmology, Ophthalmology Hospital of Ningbo, Ningbo, People’s Republic of China
| | - Zhe Zhang
- Department of Ophthalmology, Ophthalmology Hospital of Ningbo, Ningbo, People’s Republic of China
| | - Wei Mao
- Department of Ophthalmology, Ophthalmology Hospital of Ningbo, Ningbo, People’s Republic of China
| | - Yu-Sheng Zhou
- Department of Ophthalmology, Ophthalmology Hospital of Ningbo, Ningbo, People’s Republic of China
| | - Qin-Bo Li
- Department of Ophthalmology, Ophthalmology Hospital of Ningbo, Ningbo, People’s Republic of China
| | - Jian-Shu Yuan
- Department of Ophthalmology, Ophthalmology Hospital of Ningbo, Ningbo, People’s Republic of China
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Wang Y, Zhang X, Yang L, Xue J, Hu G. Blockade of CCL2 enhances immunotherapeutic effect of anti-PD1 in lung cancer. J Bone Oncol 2018; 11:27-32. [PMID: 29892522 PMCID: PMC5993943 DOI: 10.1016/j.jbo.2018.01.002] [Citation(s) in RCA: 52] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2017] [Revised: 12/29/2017] [Accepted: 01/07/2018] [Indexed: 12/12/2022] Open
Abstract
Myeloid derived suppressor cells (MDSC) play a pivotal role in tumor immune evasion and MDSC levels increased in patients with cancer. Studies confirmed the associations between MDSC and various cytokines in the peripheral blood. However, little is known about the association between parenchymal MDSC subsets and cytokines, or the mechanism drawing MDSC into tumor parenchyma. This study was to analyze the correlation between MDSC subsets and CCL2 level in lung cancer model. G-MDSC and M-MDSC from the blood and parenchyma were analyzed by flow cytometry and western blot in the lung tumor model. CCL2 was detected by ELISA assay, real-time PCR, western blot and flow cytometry. Furthermore, the therapeutic effects of combination treatment combining CCL2 antagonist and anti-PD1 antibody were assessed. Results showed that MDSC subsets had a positive correlation with CCL2, suggesting CCL2 may attract MDSC into the parenchyma. Gene and protein expression of CCL2, as well as the CCL2 surface expression significantly increased in blood and tumor of tumor-bearing mice. Anti-CCL2 treatment decreased G-MDSC and M-MDSC in the periphery and tumor through inhibiting the protein expression of arginase 1 and iNOS. In addition, combination therapy enhanced CD4+ and CD8+ T cell infiltration, as well as the production of interferon gamma (IFNγ), and increased the survival time of tumor-bearing mice. Our study provided potential new target to enhance the efficacy of immunotherapy in patients with lung cancer, in addition to elucidate a possible association between MDSC subsets and the cytokine drawing MDSC migration into the tumor tissue.
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Affiliation(s)
- Yue Wang
- Department of Thoracic Surgery, China-Japan Union Hospital of Jilin University, Changchun 130033, Jilin, PR China
| | - Xiaokai Zhang
- Department of Thoracic Surgery, Jilin Cancer Hospital, Changchun 130012, Jilin, PR China
| | - Liangliang Yang
- Department of Thoracic Surgery, China-Japan Union Hospital of Jilin University, Changchun 130033, Jilin, PR China
| | - Jinru Xue
- Department of Thoracic Surgery, China-Japan Union Hospital of Jilin University, Changchun 130033, Jilin, PR China
| | - Guangrui Hu
- Health Examination Center, China-Japan Union Hospital of Jilin University, Changchun 130033, Jilin, PR China
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16
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Yang L, Wang B, Qin J, Zhou H, Majumdar APN, Peng F. Blockade of CCR5-mediated myeloid derived suppressor cell accumulation enhances anti-PD1 efficacy in gastric cancer. Immunopharmacol Immunotoxicol 2018; 40:91-97. [PMID: 29303012 DOI: 10.1080/08923973.2017.1417997] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
PURPOSE Myeloid derived suppressor cells (MDSC) play an important role in tumor immune evasion and its level significantly increased in patients with gastric cancer. Studies confirmed the associations between MDSC and various cytokines in the peripheral blood. However, little is known about the mechanism drawing MDSC into tumor parenchyma. This study was to analyze the correlation between MDSC subsets and CCR5 level in gastric cancer. MATERIALS AND METHODS G-MDSC and M-MDSC from the peripheral blood and tumor parenchyma were analyzed by flow cytometry. CCR5 ligand CCL5 was detected by ELISA. CCR5 was detected by real-time PCR, western blot and flow cytometry. Furthermore, the therapeutic effects of CCR5 blockade was assessed by the tumor model. RESULTS CCR5 ligand, gene and protein expression of CCR5, and surface expression of CCR5 significantly increased in blood and tumor of tumor-bearing mice, suggesting MDSC may be attracted into the parenchyma by CCL5/CCR5. Anti-CCR5 treatment decreased G-MDSC and M-MDSC in the periphery and tumor. In addition, combination treatment enhanced CD4+ and CD8+ T cell infiltration and decreased the tumor burden of tumor-bearing mice. CONCLUSIONS This study elucidated a possible association between MDSC subsets and CCR5, in addition to provide a new potential target to enhance the efficacy of immunotherapy in patients with gastric cancer.
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Affiliation(s)
- Liu Yang
- a Department of Gastroenterology, Shanghai Ninth People's Hospital, School of Medicine , Shanghai Jiaotong University , Shanghai , P.R. China
| | - Bing Wang
- b Department of Surgery, Shanghai Ninth People's Hospital, School of Medicine , Shanghai Jiaotong University , Shanghai , P.R. China
| | - Jian Qin
- b Department of Surgery, Shanghai Ninth People's Hospital, School of Medicine , Shanghai Jiaotong University , Shanghai , P.R. China
| | - HengHua Zhou
- c Department of Pathology, Shanghai Ninth People's Hospital, School of Medicine , Shanghai Jiaotong University , Shanghai , P.R. China
| | - Adhip P N Majumdar
- d Division of Gastroenterology and Department of Internal Medicine, Veterans Affairs Medical Center, Karmanos Cancer Institute, School of Medicine , Wayne State University , Detroit , MI , USA
| | - Fei Peng
- e Department of Surgery , Jingan Branch of Huashan Hospital, Fudan University , Shanghai , P.R. China
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Yi EH, Xu F, Li P. (3R)-5,6,7-trihydroxy-3-isopropyl-3-methylisochroman-1-one alleviates lipoteichoic acid-induced photoreceptor cell damage. Cutan Ocul Toxicol 2017; 37:367-373. [PMID: 29171282 DOI: 10.1080/15569527.2017.1409753] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Affiliation(s)
- En-Hui Yi
- Department of Ophthalmology, Xi'an Central Hospital, Xi'an, People’s Republic of China
| | - Feng Xu
- Department of Ophthalmology, Xi'an Children's Hospital, Xi'an, People’s Republic of China
| | - Peng Li
- Department of Ophthalmology, the First Affiliated Hospital of Xi'an Jiaotong University, Xi’an, People’s Republic of China
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Inhibition of IL-18-mediated myeloid derived suppressor cell accumulation enhances anti-PD1 efficacy against osteosarcoma cancer. J Bone Oncol 2017; 9:59-64. [PMID: 29226090 PMCID: PMC5715437 DOI: 10.1016/j.jbo.2017.10.002] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2017] [Revised: 10/24/2017] [Accepted: 10/29/2017] [Indexed: 12/11/2022] Open
Abstract
Myeloid derived suppressor cells (MDSC) are very important in tumor immune evasion and they dramatically increased in peripheral blood of patients with osteosarcoma cancer. The association between MDSC and various cytokines has been studied in the peripheral blood. However, little is known about the mechanism drawing MDSC into tumor parenchyma. This study was to analyze the correlation between MDSC subsets and interleukin 18 (IL-18) level in osteosarcoma tumor model and its effect on the immunotherapy. MDSC were isolated from the blood and parenchyma and analyzed in the osteosarcoma tumor model. IL-18 levels were detected by enzyme-linked immunosorbent assay (ELISA) assay, real-time PCR, western blot and flow cytometry. Moreover, combination treatment with IL-18 inhibition and anti-PD1 was conducted to assess the therapeutic effects of IL-18 blockade. Results showed MDSC levels had a positive correlation with IL-18, suggesting IL-18 may attract MDSC into the parenchyma. IL-18 gene and protein expression significantly increased in blood and tumor lysates of tumor-bearing mice. Anti-IL-18 treatment significantly decreased G-MDSC and M-MDSC in the peripheral blood and tumor. Furthermore, combination therapy decreased the tumor burden and increased CD4+ and CD8+ T cell infiltration, as well as the production of interferon gamma (IFNγ) and granzyme B. Our study revealed a possible correlation between MDSC subsets and IL-18 inducing MDSC migration into the tumor tissue, in addition to provide the potential target to enhance the efficacy of immunotherapy in patients with osteosarcoma.
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Kang K, Yu M. Protective effect of sulforaphane against retinal degeneration in the Pde6 rd10 mouse model of retinitis pigmentosa. Curr Eye Res 2017; 42:1684-1688. [PMID: 28937835 DOI: 10.1080/02713683.2017.1358371] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
PURPOSE Retinitis pigmentosa (RP) is a group of inherited diseases characterized by the death of rod photoreceptors, followed by the death of cone photoreceptors, progressively leading to partial or complete blindness. Currently no specific treatment is available for RP patients. Sulforaphane (SFN) has been confirmed to be an effective antioxidant in the treatment of many diseases. In this study, we tested the therapeutic effects of SFN against photoreceptor degeneration in Pde6brd10 mice. METHODS rd10 mice and C57/BL6 wild-type (WT) mice were treated with SFN and saline, respectively, from P6 to P20. Electroretinography (ERG), terminal deoxynucleotidyl transferase dUTP nick end labeling and western blot were tested, respectively, at P21 for the analysis of retinal function, retinal cell apoptosis or death and the protein express of GRP78/BiP (TUNEL) as a marker of endoplasmic reticulum (ER) stress. RESULTS Compared with the saline group, the SFN-treated group showed significantly higher ERG a-wave and b-wave amplitudes, less photoreceptor death, and the downregulation of GRP78/BiP. CONCLUSIONS Our data showed that SFN ameliorated the retinal degeneration of rd10 mice, which is possibly related to the downregulation of GRP78 expression.
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Affiliation(s)
- Kai Kang
- a Department of Ophthalmic Research , Cole Eye Institute, Cleveland Clinic Foundation , Cleveland , OH 44195 , USA
| | - Minzhong Yu
- a Department of Ophthalmic Research , Cole Eye Institute, Cleveland Clinic Foundation , Cleveland , OH 44195 , USA.,b Department of Ophthalmology , Cleveland Clinic Lerner College of Medicine of Case Western Reserve University , Cleveland , OH 44195 , USA
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Peachey NS, Hasan N, FitzMaurice B, Burrill S, Pangeni G, Karst SY, Reinholdt L, Berry ML, Strobel M, Gregg RG, McCall MA, Chang B. A missense mutation in Grm6 reduces but does not eliminate mGluR6 expression or rod depolarizing bipolar cell function. J Neurophysiol 2017; 118:845-854. [PMID: 28490646 DOI: 10.1152/jn.00888.2016] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2016] [Revised: 05/03/2017] [Accepted: 05/03/2017] [Indexed: 01/01/2023] Open
Abstract
GRM6 encodes the metabotropic glutamate receptor 6 (mGluR6) used by retinal depolarizing bipolar cells (DBCs). Mutations in GRM6 lead to DBC dysfunction and underlie the human condition autosomal recessive complete congenital stationary night blindness. Mouse mutants for Grm6 are important models for this condition. Here we report a new Grm6 mutant, identified in an electroretinogram (ERG) screen of mice maintained at The Jackson Laboratory. The Grm6nob8 mouse has a reduced-amplitude b-wave component of the ERG, which reflects light-evoked DBC activity. Sequencing identified a missense mutation that converts a highly conserved methionine within the ligand binding domain to leucine (p.Met66Leu). Consistent with prior studies of Grm6 mutant mice, the laminar size and structure in the Grm6nob8 retina were comparable to control. The Grm6nob8 phenotype is distinguished from other Grm6 mutants that carry a null allele by a reduced but not absent ERG b-wave, decreased but present expression of mGluR6 at DBC dendritic tips, and mislocalization of mGluR6 to DBC somas. Consistent with a reduced but not absent b-wave, there were a subset of retinal ganglion cells whose responses to light onset have times to peak within the range of those in control retinas. These data indicate that the p.Met66Leu mutant mGluR6 is trafficked less than control. However, the mGluR6 that is localized to the DBC dendritic tips is able to initiate DBC signal transduction. The Grm6nob8 mouse extends the Grm6 allelic series and will be useful for elucidating the role of mGluR6 in DBC signal transduction and in human disease.NEW & NOTEWORTHY This article describes a mouse model of the human disease complete congenital stationary night blindness in which the mutation reduces but does not eliminate GRM6 expression and bipolar cell function, a distinct phenotype from that seen in other Grm6 mouse models.
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Affiliation(s)
- Neal S Peachey
- Cole Eye Institute, Cleveland Clinic, Cleveland, Ohio.,Louis Stokes Cleveland Department of Veterans Affairs Medical Center, Cleveland, Ohio.,Department of Ophthalmology, Cleveland Clinic College of Medicine of Case Western Reserve University, Cleveland, Ohio
| | - Nazarul Hasan
- Department of Biochemistry and Molecular Genetics, University of Louisville, Louisville, Kentucky
| | | | | | - Gobinda Pangeni
- Department of Ophthalmology and Visual Sciences, University of Louisville, Louisville, Kentucky; and
| | | | | | | | | | - Ronald G Gregg
- Department of Biochemistry and Molecular Genetics, University of Louisville, Louisville, Kentucky.,Department of Ophthalmology and Visual Sciences, University of Louisville, Louisville, Kentucky; and
| | - Maureen A McCall
- Department of Ophthalmology and Visual Sciences, University of Louisville, Louisville, Kentucky; and.,Department of Anatomical Sciences and Neurobiology, University of Louisville, Louisville, Kentucky
| | - Bo Chang
- The Jackson Laboratory, Bar Harbor, Maine;
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Li Y, Li T, Li JZ, Wu QS. (2R, 3S)-Pinobanksin-3-cinnamate ameliorates photoreceptor degeneration in Pde6 rd10 mice. Cutan Ocul Toxicol 2016; 36:273-277. [PMID: 27892714 DOI: 10.1080/15569527.2016.1265551] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
As an inherited disorder caused by initial death of rod photoreceptors, retinitis pigmentosa is currently untreatable and usually leads to partial or complete blindness. (2R, 3S)-Pinobanksin-3-cinnamate (PC) is a new flavonone isolated from the seed of Alpinia galanga Willd, and has been reported to exert neuroprotective effects by upregulating endogenous antioxidant enzymes. In this study, the anti-oxidative and neuroprotective activity of PC against photoreceptor apoptosis in rd10 mouse model of retinitis pigmentosa was explored. PC showed to produce significant improvement in histology and function in rd10 mice through reducing oxidative stress. For the first time, the protective effects of PC were demonstrated against retina degeneration in rd10 mice and our study provides scientific rationale on using PC as the supplementary treatment to the outer retina diseases, including retinitis pigmentosa, in which oxidative stress is thought to contribute to disease progression.
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Affiliation(s)
- Yin Li
- a Department of Ophthalmology , Central Hospital of Enshi Autonomous Prefecture, Enshi Clinical College of Wuhan University , Enshi , People's Republic of China
| | - Tuo Li
- a Department of Ophthalmology , Central Hospital of Enshi Autonomous Prefecture, Enshi Clinical College of Wuhan University , Enshi , People's Republic of China
| | - Jia-Zhang Li
- a Department of Ophthalmology , Central Hospital of Enshi Autonomous Prefecture, Enshi Clinical College of Wuhan University , Enshi , People's Republic of China
| | - Qing-Song Wu
- a Department of Ophthalmology , Central Hospital of Enshi Autonomous Prefecture, Enshi Clinical College of Wuhan University , Enshi , People's Republic of China
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Carnosic acid slows photoreceptor degeneration in the Pde6b(rd10) mouse model of retinitis pigmentosa. Sci Rep 2016; 6:22632. [PMID: 26961159 PMCID: PMC4785376 DOI: 10.1038/srep22632] [Citation(s) in RCA: 45] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2015] [Accepted: 02/19/2016] [Indexed: 12/11/2022] Open
Abstract
The photoreceptor cell death associated with the various genetic forms of retinitis pigmentosa (RP) is currently untreatable and leads to partial or complete vision loss. Carnosic acid (CA) upregulates endogenous antioxidant enzymes and has proven neuroprotective in studies of neurodegenerative models affecting the brain. In this study, we examined the potential effect of CA on photoreceptor death in the Pde6brd10 mouse model of RP. Our data shows that CA provided morphological and functional preservation of photoreceptors. CA appears to exert its neuroprotective effects through inhibition of oxidative stress and endoplasmic reticulum stress.
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