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Zhang H, Mo Y. The gut-retina axis: a new perspective in the prevention and treatment of diabetic retinopathy. Front Endocrinol (Lausanne) 2023; 14:1205846. [PMID: 37469982 PMCID: PMC10352852 DOI: 10.3389/fendo.2023.1205846] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/14/2023] [Accepted: 06/19/2023] [Indexed: 07/21/2023] Open
Abstract
Diabetic retinopathy (DR) is a microvascular lesion that occurs as a complication of diabetes mellitus. Many studies reveal that retinal neurodegeneration occurs early in its pathogenesis, and abnormal retinal function can occur in patients without any signs of microvascular abnormalities. The gut microbiota is a large, diverse colony of microorganisms that colonize the human intestine. Studies indicated that the gut microbiota is involved in the pathophysiological processes of DR and plays an important role in its development. On the one hand, numerous studies demonstrated the involvement of gut microbiota in retinal neurodegeneration. On the other hand, alterations in gut bacteria in RD patients can cause or exacerbate DR. The present review aims to underline the critical relationship between gut microbiota and DR. After a brief overview of the composition, function, and essential role of the gut microbiota in ocular health, and the review explores the concept of the gut-retina axis and the conditions of the gut-retina axis crosstalk. Because gut dysbiosis has been associated with DR, the review intends to determine changes in the gut microbiome in DR, the hypothesized mechanisms linking to the gut-retina axis, and its predictive potential.
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Affiliation(s)
- Haiyan Zhang
- Chengdu University of Traditional Chinese Medicine, Sichuan, China
| | - Ya Mo
- Chengdu University of Traditional Chinese Medicine, Sichuan, China
- Affiliated Hospital of Chengdu University of Traditional Chinese Medicine, Sichuan, China
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2
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Kolibabka M, Dannehl M, Oezer K, Murillo K, Huang H, Riemann S, Hoffmann S, Gretz N, Schlotterer A, Feng Y, Hammes HP. Differences in junction-associated gene expression changes in three rat models of diabetic retinopathy with similar neurovascular phenotype. Neurobiol Dis 2023; 176:105961. [PMID: 36526091 DOI: 10.1016/j.nbd.2022.105961] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2022] [Revised: 11/24/2022] [Accepted: 12/06/2022] [Indexed: 12/14/2022] Open
Abstract
Diabetic retinopathy, also defined as microvascular complication of diabetes mellitus, affects the entire neurovascular unit with specific aberrations in every compartment. Neurodegeneration, glial activation and vasoregression are observed consistently in models of diabetic retinopathy. However, the order and the severity of these aberrations varies in different models, which is also true in patients. In this study, we analysed rat models of diabetic retinopathy with similar phenotypes to identify key differences in the pathogenesis. For this, we focussed on intercellular junction-associated gene expression, which are important for the communication and homeostasis within the neurovascular unit. Streptozotocin-injected diabetic Wistar rats, methylglyoxal supplemented Wistar rats and polycystin-2 transgenic (PKD) rats were analysed for neuroretinal function, vasoregression and retinal expression of junction-associated proteins. In all three models, neuroretinal impairment and vasoregression were observed, but gene expression profiling of junction-associated proteins demonstrated nearly no overlap between the three models. However, the differently expressed genes were from the main classes of claudins, connexins and integrins in all models. Changes in Rcor1 expression in diabetic rats and Egr1 expression in PKD rats confirmed the differences in upstream transcription factor level between the models. In PKD rats, a possible role for miRNA regulation was observed, indicated by an upregulation of miR-26b-5p, miR-122-5p and miR-300-3p, which was not observed in the other models. In silico allocation of connexins revealed not only differences in regulated subtypes, but also in affected retinal cell types, as well as connexin specific upstream regulators Sox7 and miR-92a-3p. In this study, we demonstrate that, despite their similar phenotype, models for diabetic retinopathy exhibit significant differences in their pathogenic pathways and primarily affected cell types. These results underline the importance for more sensitive diagnostic tools to identify pathogenic clusters in patients as the next step towards a desperately needed personalized therapy.
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Affiliation(s)
- Matthias Kolibabka
- 5th Medical Department, Medical Faculty Mannheim, Heidelberg University, Theodor-Kutzer-Ufer 1-3, 68167 Mannheim, Germany; European Center for Angioscience, Ludolf-Krehl-Strasse 13 - 17, 68167 Mannheim, Germany.
| | - Marcus Dannehl
- 5th Medical Department, Medical Faculty Mannheim, Heidelberg University, Theodor-Kutzer-Ufer 1-3, 68167 Mannheim, Germany; European Center for Angioscience, Ludolf-Krehl-Strasse 13 - 17, 68167 Mannheim, Germany
| | - Kübra Oezer
- 5th Medical Department, Medical Faculty Mannheim, Heidelberg University, Theodor-Kutzer-Ufer 1-3, 68167 Mannheim, Germany
| | - Katharina Murillo
- 5th Medical Department, Medical Faculty Mannheim, Heidelberg University, Theodor-Kutzer-Ufer 1-3, 68167 Mannheim, Germany; European Center for Angioscience, Ludolf-Krehl-Strasse 13 - 17, 68167 Mannheim, Germany
| | - Hongpeng Huang
- Experimental Pharmacology, European Center for Angioscience, Medical Faculty Mannheim, Heidelberg University, Ludolf-Krehl-Strasse 13 - 17, 68167 Manheim, Germany
| | - Sarah Riemann
- 5th Medical Department, Medical Faculty Mannheim, Heidelberg University, Theodor-Kutzer-Ufer 1-3, 68167 Mannheim, Germany; European Center for Angioscience, Ludolf-Krehl-Strasse 13 - 17, 68167 Mannheim, Germany
| | - Sigrid Hoffmann
- Medical Research Center, Medical Faculty Mannheim, Heidelberg University, Theodor-Kutzer-Ufer 1-3, 68167 Mannheim, Germany
| | - Norbert Gretz
- Medical Research Center, Medical Faculty Mannheim, Heidelberg University, Theodor-Kutzer-Ufer 1-3, 68167 Mannheim, Germany
| | - Andrea Schlotterer
- 5th Medical Department, Medical Faculty Mannheim, Heidelberg University, Theodor-Kutzer-Ufer 1-3, 68167 Mannheim, Germany; European Center for Angioscience, Ludolf-Krehl-Strasse 13 - 17, 68167 Mannheim, Germany
| | - Yuxi Feng
- Experimental Pharmacology, European Center for Angioscience, Medical Faculty Mannheim, Heidelberg University, Ludolf-Krehl-Strasse 13 - 17, 68167 Manheim, Germany
| | - Hans-Peter Hammes
- 5th Medical Department, Medical Faculty Mannheim, Heidelberg University, Theodor-Kutzer-Ufer 1-3, 68167 Mannheim, Germany; European Center for Angioscience, Ludolf-Krehl-Strasse 13 - 17, 68167 Mannheim, Germany
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Rajeswaren V, Wong JO, Yabroudi D, Nahomi RB, Rankenberg J, Nam MH, Nagaraj RH. Small Heat Shock Proteins in Retinal Diseases. Front Mol Biosci 2022; 9:860375. [PMID: 35480891 PMCID: PMC9035800 DOI: 10.3389/fmolb.2022.860375] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2022] [Accepted: 03/11/2022] [Indexed: 11/29/2022] Open
Abstract
This review summarizes the latest findings on small heat shock proteins (sHsps) in three major retinal diseases: glaucoma, diabetic retinopathy, and age-related macular degeneration. A general description of the structure and major cellular functions of sHsps is provided in the introductory remarks. Their role in specific retinal diseases, highlighting their regulation, role in pathogenesis, and possible use as therapeutics, is discussed.
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Affiliation(s)
- Vivian Rajeswaren
- Department of Ophthalmology, Sue Anschutz-Rodgers Eye Center, School of Medicine, Aurora, CO, United States
| | - Jeffrey O. Wong
- Department of Ophthalmology, Sue Anschutz-Rodgers Eye Center, School of Medicine, Aurora, CO, United States
| | - Dana Yabroudi
- Department of Ophthalmology, Sue Anschutz-Rodgers Eye Center, School of Medicine, Aurora, CO, United States
| | - Rooban B. Nahomi
- Department of Ophthalmology, Sue Anschutz-Rodgers Eye Center, School of Medicine, Aurora, CO, United States
| | - Johanna Rankenberg
- Department of Ophthalmology, Sue Anschutz-Rodgers Eye Center, School of Medicine, Aurora, CO, United States
| | - Mi-Hyun Nam
- Department of Ophthalmology, Sue Anschutz-Rodgers Eye Center, School of Medicine, Aurora, CO, United States
- *Correspondence: Mi-Hyun Nam, ; Ram H. Nagaraj,
| | - Ram H. Nagaraj
- Department of Ophthalmology, Sue Anschutz-Rodgers Eye Center, School of Medicine, Aurora, CO, United States
- Department of Pharmaceutical Sciences, Skaggs School of Pharmacy and Pharmaceutical Sciences, University of Colorado, Aurora, CO, United States
- *Correspondence: Mi-Hyun Nam, ; Ram H. Nagaraj,
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Syu JP, Buddhakosai W, Chen SJ, Ke CC, Chiou SH, Kuo WC. Supercontinuum source-based multi-contrast optical coherence tomography for rat retina imaging. BIOMEDICAL OPTICS EXPRESS 2018; 9:6132-6144. [PMID: 31065418 PMCID: PMC6490977 DOI: 10.1364/boe.9.006132] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/17/2018] [Revised: 10/29/2018] [Accepted: 11/01/2018] [Indexed: 05/06/2023]
Abstract
This study proposed an ultrahigh-resolution multi-contrast optical coherence tomography system integrated with fundus photography for in vivo retinal imaging of rodents. A supercontinuum light source was used in the system, providing an axial resolution of less than 3 µm within 1.8 mm (in the tissue). Three types of tissue contrast based on backscattered intensity, phase retardation, and microvasculature at a capillary level can be simultaneously obtained using the proposed system. Pigmented Long-Evans, non-pigmented (albino) Sprague Dawley, and Royal College of Surgeons rats were imaged and compared. In vivo imaging results were validated with histology.
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Affiliation(s)
- Jia-Pu Syu
- Institute of Biophotonics, National Yang-Ming University, Taipei 112, Taiwan
| | - Waradee Buddhakosai
- Department of Medical Research, Taipei Veterans General Hospital, Taipei, Taiwan
| | - Shih-Jen Chen
- Department of Ophthalmology, Taipei Veterans General Hospital, Taiwan
- School of Medicine, National Yang-Ming University, Taiwan
| | - Chang-Chih Ke
- Department and Institute of Pharmacology, National Yang-Ming University, Taipei 112, Taiwan
| | - Shih-Hwa Chiou
- Department of Medical Research, Taipei Veterans General Hospital, Taipei, Taiwan
- Department of Ophthalmology, Taipei Veterans General Hospital, Taiwan
- Department and Institute of Pharmacology, National Yang-Ming University, Taipei 112, Taiwan
- Center For Intelligent Drug Systems and Smart Bio-devices (IDSB), National Chiao Tung University, Hsinchu, Taiwan
| | - Wen-Chuan Kuo
- Institute of Biophotonics, National Yang-Ming University, Taipei 112, Taiwan
- Center For Intelligent Drug Systems and Smart Bio-devices (IDSB), National Chiao Tung University, Hsinchu, Taiwan
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Do photoreceptor cells cause the development of retinal vascular disease? Vision Res 2017; 139:65-71. [PMID: 28438678 DOI: 10.1016/j.visres.2017.03.011] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2017] [Revised: 03/29/2017] [Accepted: 03/30/2017] [Indexed: 10/19/2022]
Abstract
The retinal vasculature is affected in a number of clinically important retinopathies, including diabetic retinopathy. There has been a considerable amount of research into the pathogenesis of retinal microvascular diseases, but the potential contribution of the most abundant cell population in the retina, photoreceptor cells, has been largely overlooked. This review summarizes ongoing research suggesting that photoreceptor cells play a critical role in the development of retinal vascular disease in diabetic retinopathy and other retinopathies.
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Awata T, Yamashita H, Kurihara S, Morita-Ohkubo T, Miyashita Y, Katayama S, Mori K, Yoneya S, Kohda M, Okazaki Y, Maruyama T, Shimada A, Yasuda K, Nishida N, Tokunaga K, Koike A. A genome-wide association study for diabetic retinopathy in a Japanese population: potential association with a long intergenic non-coding RNA. PLoS One 2014; 9:e111715. [PMID: 25364816 PMCID: PMC4218806 DOI: 10.1371/journal.pone.0111715] [Citation(s) in RCA: 60] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2014] [Accepted: 09/30/2014] [Indexed: 12/31/2022] Open
Abstract
Elucidation of the genetic susceptibility factors for diabetic retinopathy (DR) is important to gain insight into the pathogenesis of DR, and may help to define genetic risk factors for this condition. In the present study, we conducted a three-stage genome-wide association study (GWAS) to identify DR susceptibility loci in Japanese patients, which comprised a total of 837 type 2 diabetes patients with DR (cases) and 1,149 without DR (controls). From the stage 1 genome-wide scan of 446 subjects (205 cases and 241 controls) on 614,216 SNPs, 249 SNPs were selected for the stage 2 replication in 623 subjects (335 cases and 288 controls). Eight SNPs were further followed up in a stage 3 study of 297 cases and 620 controls. The top signal from the present association analysis was rs9362054 in an intron of RP1-90L14.1 showing borderline genome-wide significance (Pmet = 1.4×10−7, meta-analysis of stage 1 and stage 2, allele model). RP1-90L14.1 is a long intergenic non-coding RNA (lincRNA) adjacent to KIAA1009/QN1/CEP162 gene; CEP162 plays a critical role in ciliary transition zone formation before ciliogenesis. The present study raises the possibility that the dysregulation of ciliary-associated genes plays a role in susceptibility to DR.
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Affiliation(s)
- Takuya Awata
- Department of Endocrinology and Diabetes, Faculty of Medicine, Saitama Medical University, Saitama, Japan
- * E-mail:
| | - Hisakuni Yamashita
- Department of Endocrinology and Diabetes, Faculty of Medicine, Saitama Medical University, Saitama, Japan
| | - Susumu Kurihara
- Department of Endocrinology and Diabetes, Faculty of Medicine, Saitama Medical University, Saitama, Japan
| | - Tomoko Morita-Ohkubo
- Department of Endocrinology and Diabetes, Faculty of Medicine, Saitama Medical University, Saitama, Japan
| | - Yumi Miyashita
- Division of RI Laboratory, Biomedical Research Center, Saitama Medical University, Saitama, Japan
| | - Shigehiro Katayama
- Department of Endocrinology and Diabetes, Faculty of Medicine, Saitama Medical University, Saitama, Japan
| | - Keisuke Mori
- Department of Ophthalmology, Faculty of Medicine, Saitama Medical University, Faculty of Medicine, Saitama, Japan
| | - Shin Yoneya
- Department of Ophthalmology, Faculty of Medicine, Saitama Medical University, Faculty of Medicine, Saitama, Japan
| | - Masakazu Kohda
- Division of Translational Research, Research Center for Genomic Medicine, Saitama Medical University, Saitama, Japan
| | - Yasushi Okazaki
- Division of Translational Research, Research Center for Genomic Medicine, Saitama Medical University, Saitama, Japan
| | - Taro Maruyama
- Department of Internal Medicine, Saitama Social Insurance Hospital, Saitama, Japan
| | - Akira Shimada
- Department of Internal Medicine, Saiseikai Central Hospital, Tokyo, Japan
| | - Kazuki Yasuda
- Department of Metabolic Disorder, Diabetes Research Center, Research Institute, National Center for Global Health and Medicine, Tokyo, Japan
| | - Nao Nishida
- Research Center for Hepatitis and Immunology, National Center for Global Health and Medicine, Chiba, Japan
- Department of Human Genetics, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan
| | - Katsushi Tokunaga
- Department of Human Genetics, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan
| | - Asako Koike
- Central Research Laboratory, Hitachi Ltd, Tokyo, Japan
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