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Buyuktepe TC, Demirel S, Batıoğlu F, Özmert E. The Correlation of Inflammation and Microvascular Changes with Diabetic Retinal Neurodegeneration. Curr Eye Res 2021; 46:1559-1566. [PMID: 33759680 DOI: 10.1080/02713683.2021.1908567] [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: 10/21/2022]
Abstract
Purpose: To evaluate the effect of aqueous flare intensity as a measurement of inflammation and microvascular changes on retinal neurodegeneration in diabetic eyes.Materials and Methods: In cross-sectional study diabetic patients were assigned into 2 groups according to the presence of retinopathy: patients with nonproliferative diabetic retinopathy (group 1) and diabetic patients without clinically overt retinopathy (group 2). As a control group (group 3), age-matched healthy controls were included in the study. All subjects underwent visual acuity measurement, slit-lamp examination, ophthalmoscopy, spectral-domain optic coherence tomography (SD-OCT), optic coherence tomography angiography (OCTA), and laser flare-cell meter (LFCM).Results: The study enrolled 99 eyes of 99 patients in group 1; 99 eyes of 99 patients in group 2, and 50 eyes of 50 age-matched healthy controls in group 3. The eyes in group 1 had higher flare intensity, decreased ganglion cell layer (GCL) thickness, enlarged foveal avascular zone (FAZ) area, and enlarged capillary non-flow area compared to those in group 2 (p < .005). In group 1, decreased GCL thickness was statistically significantly correlated with increased aqueous flare intensity, enlarged FAZ area, and enlarged capillary non-flow area (p < .005).Conclusion: The results demonstrated a correlation of the retinal neurodegeneration with the aqueous flare levels and macular ischemia indices in the early stages of diabetic retinopathy. This finding supports the role of inflammation in the pathogenesis of diabetic retinal neuropathy.
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Affiliation(s)
- Tuna Celik Buyuktepe
- Department of Ophthalmology, Dr Nafiz Körez Sincan State Hospital, Ankara, Turkey
| | - Sibel Demirel
- Department of Ophthalmology, Ankara University Faculty of Medicine, Ankara, Turkey
| | - Figen Batıoğlu
- Department of Ophthalmology, Ankara University Faculty of Medicine, Ankara, Turkey
| | - Emin Özmert
- Department of Ophthalmology, Ankara University Faculty of Medicine, Ankara, Turkey
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Mendonça HR, Carpi-Santos R, da Costa Calaza K, Blanco Martinez AM. Neuroinflammation and oxidative stress act in concert to promote neurodegeneration in the diabetic retina and optic nerve: galectin-3 participation. Neural Regen Res 2020; 15:625-635. [PMID: 31638084 PMCID: PMC6975153 DOI: 10.4103/1673-5374.266910] [Citation(s) in RCA: 35] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2019] [Revised: 04/01/2019] [Accepted: 06/11/2019] [Indexed: 02/07/2023] Open
Abstract
Diabetes is a lifelong disease characterized by glucose metabolic imbalance, in which low insulin levels or impaired insulin signaling lead to hyperglycemic state. Within 20 years of diabetes progression, 95% of patients will have diabetic retinopathy, the leading cause of visual defects in working-age people worldwide. Although diabetes is considered a microvascular disease, recent studies have shown that neurodegeneration precedes vascular changes within the diabetic visual system, albeit its mechanisms are still under investigation. Neuroinflammation and oxidative stress are intrinsically related phenomena, since macrophage/microglia and astrocytes are the main sources of reactive oxygen species during central nervous system chronic degenerative diseases, and both pathological processes are increased in the visual system during diabetes. The present review will focus on recent findings of the contribution of oxidative stress derived from neuroinflammation in the early neurodegenerative aspects of the diabetic visual system and their relationship with galectin-3.
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Affiliation(s)
- Henrique Rocha Mendonça
- Laboratório de Neurodegeneração e Reparo, Departamento de Patologia, Programa de Pós-graduação em Anatomia Patológica, Faculdade de Medicina, Hospital Universitrio Clementino Fraga Filho, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil
- Pólo Universitário Macaé, Unidade Integrada de Pesquisa em Produtos Bioativos e Biociências, Federal University of Rio de Janeiro, Macaé, Brazil
- Laboratório Integrado de Morfologia, Instituto de Biodiversidade e Sustentabilidade, Núcleo de Pesquisas Ecológicas de Macaé, Federal University of Rio de Janeiro, Macaé, Brazil
| | - Raul Carpi-Santos
- Laboratório de Neurobiologia Celular, Instituto de Ciências Biomédicas, Centro de Ciências da Saúde, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil
| | - Karin da Costa Calaza
- Laboratório de Neurobiologia da Retina, Departamento de Neurobiologia, Programa de Pós-Graduação em Neurociências, Fluminense Federal University, Niterói, Brazil
| | - Ana Maria Blanco Martinez
- Laboratório de Neurodegeneração e Reparo, Departamento de Patologia, Programa de Pós-graduação em Anatomia Patológica, Faculdade de Medicina, Hospital Universitrio Clementino Fraga Filho, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil
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Laville V, Kang JH, Cousins CC, Iglesias AI, Nagy R, Cooke Bailey JN, Igo RP, Song YE, Chasman DI, Christen WG, Kraft P, Rosner BA, Hu F, Wilson JF, Gharahkhani P, Hewitt AW, Mackey DA, Hysi PG, Hammond CJ, vanDuijn CM, Haines JL, Vitart V, Fingert JH, Hauser MA, Aschard H, Wiggs JL, Khawaja AP, MacGregor S, Pasquale LR. Genetic Correlations Between Diabetes and Glaucoma: An Analysis of Continuous and Dichotomous Phenotypes. Am J Ophthalmol 2019; 206:245-255. [PMID: 31121135 PMCID: PMC6864262 DOI: 10.1016/j.ajo.2019.05.015] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/25/2018] [Revised: 05/03/2019] [Accepted: 05/09/2019] [Indexed: 01/05/2023]
Abstract
PURPOSE A genetic correlation is the proportion of phenotypic variance between traits that is shared on a genetic basis. Here we explore genetic correlations between diabetes- and glaucoma-related traits. DESIGN Cross-sectional study. METHODS We assembled genome-wide association study summary statistics from European-derived participants regarding diabetes-related traits like fasting blood sugar (FBS) and type 2 diabetes (T2D) and glaucoma-related traits (intraocular pressure [IOP], central corneal thickness [CCT], corneal hysteresis [CH], corneal resistance factor [CRF], cup-to-disc ratio [CDR], and primary open-angle glaucoma [POAG]). We included data from the National Eye Institute Glaucoma Human Genetics Collaboration Heritable Overall Operational Database, the UK Biobank, and the International Glaucoma Genetics Consortium. We calculated genetic correlation (rg) between traits using linkage disequilibrium score regression. We also calculated genetic correlations between IOP, CCT, and select diabetes-related traits based on individual level phenotype data in 2 Northern European population-based samples using pedigree information and Sequential Oligogenic Linkage Analysis Routines. RESULTS Overall, there was little rg between diabetes- and glaucoma-related traits. Specifically, we found a nonsignificant negative correlation between T2D and POAG (rg = -0.14; P = .16). Using Sequential Oligogenic Linkage Analysis Routines, the genetic correlations between measured IOP, CCT, FBS, fasting insulin, and hemoglobin A1c were null. In contrast, genetic correlations between IOP and POAG (rg ≥ 0.45; P ≤ 3.0 × 10-4) and between CDR and POAG were high (rg = 0.57; P = 2.8 × 10-10). However, genetic correlations between corneal properties (CCT, CRF, and CH) and POAG were low (rg range -0.18 to 0.11) and nonsignificant (P ≥ .07). CONCLUSION These analyses suggest that there is limited genetic correlation between diabetes- and glaucoma-related traits.
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Affiliation(s)
- Vincent Laville
- Department of Computational Biology, Institut Pasteur, Paris, France
| | - Jae H Kang
- Channing Division of Network Medicine, Harvard Medical School, Brigham and Women's Hospital, Boston, Massachusetts, USA
| | - Clara C Cousins
- Department of Ophthalmology, Massachusetts Eye and Ear Infirmary, Harvard Medical School, Boston, Massachusetts, USA
| | - Adriana I Iglesias
- Departments of Ophthalmology and Clinical Genetics, Erasmus Medical Center, Rotterdam, The Netherlands
| | - Réka Nagy
- MRC Human Genetics Unit, Institute of Genetics and Molecular Medicine, University of Edinburgh, Edinburgh, United Kingdom
| | - Jessica N Cooke Bailey
- Department of Population and Quantitative Health Sciences, Case Western Reserve University School of Medicine, Cleveland, Ohio, USA; Institute for Computational Biology, Case Western Reserve University School of Medicine, Cleveland, Ohio, USA
| | - Robert P Igo
- Department of Population and Quantitative Health Sciences, Case Western Reserve University School of Medicine, Cleveland, Ohio, USA
| | - Yeunjoo E Song
- Department of Population and Quantitative Health Sciences, Case Western Reserve University School of Medicine, Cleveland, Ohio, USA; Institute for Computational Biology, Case Western Reserve University School of Medicine, Cleveland, Ohio, USA
| | - Daniel I Chasman
- Division of Preventive Medicine, Harvard Medical School, Brigham and Women's Hospital, Boston, Massachusetts, USA
| | - William G Christen
- Division of Preventive Medicine, Harvard Medical School, Brigham and Women's Hospital, Boston, Massachusetts, USA
| | - Peter Kraft
- Department of Epidemiology, Harvard T. H. Chan School of Public Health, Harvard Medical School, Boston, Massachusetts, USA; Department of Biostatistics, Harvard T. H. Chan School of Public Health, Harvard Medical School, Boston, Massachusetts, USA
| | - Bernard A Rosner
- Channing Division of Network Medicine, Harvard Medical School, Brigham and Women's Hospital, Boston, Massachusetts, USA; Department of Biostatistics, Harvard T. H. Chan School of Public Health, Harvard Medical School, Boston, Massachusetts, USA
| | - Frank Hu
- Department of Epidemiology, Harvard T. H. Chan School of Public Health, Harvard Medical School, Boston, Massachusetts, USA; Department of Nutrition, Harvard T. H. Chan School of Public Health, Harvard Medical School, Boston, Massachusetts, USA
| | - James F Wilson
- MRC Human Genetics Unit, Institute of Genetics and Molecular Medicine, University of Edinburgh, Edinburgh, United Kingdom; Centre for Global Health Research, Usher Institute for Population Health Sciences and Informatics, University of Edinburgh, Edinburgh, United Kingdom
| | - Puya Gharahkhani
- Statistical Genetics, QIMR Berghofer Medical Research Institute, Brisbane, Australia
| | - Alex W Hewitt
- Centre for Eye Research Australia, University of Melbourne, Royal Victorian Eye and Ear Hospital, East Melbourne, Australia; School of Medicine, Menzies Institute for Medical Research, University of Tasmania, Hobart, Tasmania, Australia
| | - David A Mackey
- Lions Eye Institute, Centre for Ophthalmology and Visual Science, University of Western Australia, Perth, Western Australia, Australia
| | - Pirro G Hysi
- Department of Twin Research and Genetic Epidemiology, King's College London, United Kingdom
| | - Christopher J Hammond
- Department of Twin Research and Genetic Epidemiology, King's College London, United Kingdom
| | - Cornelia M vanDuijn
- Departments of Ophthalmology and Clinical Genetics, Erasmus Medical Center, Rotterdam, The Netherlands; Nuffield Department of Population Health, University of Oxford, Oxford, United Kingdom
| | - Jonathan L Haines
- Department of Population and Quantitative Health Sciences, Case Western Reserve University School of Medicine, Cleveland, Ohio, USA; Institute for Computational Biology, Case Western Reserve University School of Medicine, Cleveland, Ohio, USA
| | - Veronique Vitart
- MRC Human Genetics Unit, Institute of Genetics and Molecular Medicine, University of Edinburgh, Edinburgh, United Kingdom
| | - John H Fingert
- Department of Ophthalmology and Visual Science, University of Iowa, Iowa City, Iowa, USA
| | - Michael A Hauser
- Departments of Ophthalmology and Medicine, Duke University, Durham, North Carolina, USA
| | - Hugues Aschard
- Department of Computational Biology, Institut Pasteur, Paris, France; Department of Epidemiology, Harvard T. H. Chan School of Public Health, Harvard Medical School, Boston, Massachusetts, USA
| | - Janey L Wiggs
- Department of Ophthalmology, Massachusetts Eye and Ear Infirmary, Harvard Medical School, Boston, Massachusetts, USA
| | - Anthony P Khawaja
- Department of Public Health and Primary Care, Institute of Public Health, University of Cambridge School of Clinical Medicine, Cambridge, United Kingdom
| | - Stuart MacGregor
- Statistical Genetics, QIMR Berghofer Medical Research Institute, Brisbane, Australia
| | - Louis R Pasquale
- Channing Division of Network Medicine, Harvard Medical School, Brigham and Women's Hospital, Boston, Massachusetts, USA; Department of Ophthalmology, Icahn School of Medicine at Mount Sinai, New York, New York, USA.
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