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Zhang L, Zhang ZF, Hui YN, He F, Guan XR, Zhou J. Oxidative Stress Participates in Age-Related Cataract Formation by Disrupting Connection between Lens Epithelial Cells through c-Src/VEGF Pathway. Curr Eye Res 2024; 49:380-390. [PMID: 38108278 DOI: 10.1080/02713683.2023.2293456] [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: 07/16/2023] [Accepted: 12/05/2023] [Indexed: 12/19/2023]
Abstract
PURPOSE To observe the effects of oxidative stress on vascular endothelial growth factor (VEGF) and connections of lens epithelial cells. METHODS Human lens epithelium of patients with age-related cataract (ARC), both SRA01/04 cells and whole mice lens stimulated by H2O2 were employed. VEGF in human aqueous humor of ARC-patients and the supernatant of SRA01/04 cells was determined by ELISA. The expressions of VEFG in human lens epithelium were detected by immunofluorescence staining. Multiple linear regression analysis and spearman rank-order correlation were used to determine the associations between VEGF and parameters of ARC individuals. In H2O2-induced SRA01/04 cells, Catalase (CAT), PP1 (inhibitor of c-Src kinase) and Avastin (VEGF antibody) were used to inhibit the effects of H2O2, activation of c-Src kinase and VEGF, which were detected by Western blot. The alterations of ZO-1 and N-cadherin were tested by immunofluorescence staining and Western blot. In H2O2-induced whole lens, the changes of opacification area in different treatment of inhibitors were observed. RESULTS The secretion of VEGF in aqueous humor and expression of VEGF in the lens epithelium of ARC patients increased significantly with age. In H2O2-induced SRA01/04 cells, the VEGF in the supernatant was increased with the culture duration and the dose of H2O2. The expressions of p-Src418 and VEGF were also up-regulated, whereas the expressions of ZO-1 and N-cadherin were down-regulated. CAT effectively prevented these changes induced by H2O2, while PP1 inhibited not only p-Src418 but also up-regulation of VEGF, Avastin partially inhibited VEGF up-regulation. Both PP1 and Avastin prevented down-regulation of ZO-1 and N-cadherin, respectively, but Avastin combined with PP1 had no significant synergistic effects. In H2O2-induced cataract, CAT prevented development of opacification area effectively, and PP1 and Avastin did partially. CONCLUSIONS Oxidative stress disrupts connections of lens epithelial cells by activating c-Src/VEGF, inhibiting which may prevent cataract.
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Affiliation(s)
- Le Zhang
- Department of Ophthalmology, Eye Institute of PLA, Xijing Hospital, Fourth Military Medical University, Xi'an, Shaanxi, China
- Department of Ophthalmology, Northwest Woman's and Children's Hospital, Xi'an, Shaanxi, China
| | - Zi-Feng Zhang
- Department of Ophthalmology, Eye Institute of PLA, Xijing Hospital, Fourth Military Medical University, Xi'an, Shaanxi, China
| | - Yan-Nian Hui
- Department of Ophthalmology, Eye Institute of PLA, Xijing Hospital, Fourth Military Medical University, Xi'an, Shaanxi, China
| | - Fang He
- Department of Ophthalmology, Eye Institute of PLA, Xijing Hospital, Fourth Military Medical University, Xi'an, Shaanxi, China
| | - Xiao-Rong Guan
- Department of Ophthalmology, Eye Institute of PLA, Xijing Hospital, Fourth Military Medical University, Xi'an, Shaanxi, China
| | - Jian Zhou
- Department of Ophthalmology, Eye Institute of PLA, Xijing Hospital, Fourth Military Medical University, Xi'an, Shaanxi, China
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2
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Liu C, Cheng T, Wang Y, Li G, Wang Y, Tian W, Feng L, Zhang S, Xu Y, Gao Y, Li J, Liu J, Cui J, Yan J, Cao L, Pan Z, Qi Z, Yang L. Syringaresinol Alleviates Early Diabetic Retinopathy by Downregulating HIF-1α/VEGF via Activating Nrf2 Antioxidant Pathway. Mol Nutr Food Res 2024; 68:e2200771. [PMID: 38356045 DOI: 10.1002/mnfr.202200771] [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: 11/07/2022] [Revised: 09/10/2023] [Indexed: 02/16/2024]
Abstract
SCOPE Early diabetic retinopathy (DR) is characterized by chronic inflammation, excessive oxidative stress, and retinal microvascular damage. Syringaresinol (SYR), as a natural polyphenolic compound, has been proved to inhibit many disease progression due to its antiinflammatory and antioxidant properties. The present study focuses on exploring the effect of SYR on hyperglycemia-induced early DR as well as the underlying mechanisms. METHODS AND RESULTS Wild-type (WT) and nuclear factor erythroid 2-related factor 2 (Nrf2)-knockout C57BL/6 mice of type 1 diabetes and high glucose (HG)-induced RF/6A cells are used as in vivo and in vitro models, respectively. This study finds that SYR protects the retinal structure and function in diabetic mice and reduces the permeability and apoptosis of HG-treated RF/6A cells. Meanwhile, SYR distinctly mitigates inflammation and oxidative stress in vivo and vitro. The retinal microvascular damages are suppressed by SYR via downregulating hypoxia-inducible factor-1α (HIF-1α)/vascular endothelial growth factor (VEGF) pathway. Whereas, SYR-provided protective effects are diminished in Nrf2-knockout mice, indicating that SYR improves DR progression by activating Nrf2. Similarly, SYR cannot exert protective effects against HG-induced oxidative stress and endothelial injury in small interfering RNA (siRNA)-Nrf2-transfected RF/6A cells. CONCLUSION In summary, SYR suppresses oxidative stress via activating Nrf2 antioxidant pathway, which ameliorates retinal microvascular damage by downregulating HIF-1α/VEGF, thereby alleviating early DR progression.
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Affiliation(s)
- Chang Liu
- Department of Molecular Pharmacology, School of Medicine, Nankai University Tianjin, Tianjin, 300071, China
- Nankai University Eye Institute, Tianjin, 300071, China
| | - Tianwei Cheng
- Department of Molecular Pharmacology, School of Medicine, Nankai University Tianjin, Tianjin, 300071, China
| | - Yufei Wang
- Department of Molecular Pharmacology, School of Medicine, Nankai University Tianjin, Tianjin, 300071, China
| | - Guangru Li
- Department of Molecular Pharmacology, School of Medicine, Nankai University Tianjin, Tianjin, 300071, China
| | - Yachen Wang
- Tianjin Key Lab of Ophthalmology and Visual Science, Tianjin Eye Hospital, Tianjin Eye Institute, Nankai University Affiliated Eye Hospital, Clinical College of Ophthalmology Tianjin Medical University, Tianjin, 300020, China
| | - Wencong Tian
- Department of General Surgery, Tianjin Union Medical Center, Tianjin, 300122, China
| | - Lifeng Feng
- Department of Molecular Pharmacology, School of Medicine, Nankai University Tianjin, Tianjin, 300071, China
| | - Shengzheng Zhang
- Department of Molecular Pharmacology, School of Medicine, Nankai University Tianjin, Tianjin, 300071, China
| | - Yang Xu
- Department of Molecular Pharmacology, School of Medicine, Nankai University Tianjin, Tianjin, 300071, China
| | - Yang Gao
- Department of Molecular Pharmacology, School of Medicine, Nankai University Tianjin, Tianjin, 300071, China
| | - Jing Li
- Department of Molecular Pharmacology, School of Medicine, Nankai University Tianjin, Tianjin, 300071, China
| | - Jie Liu
- Department of Molecular Pharmacology, School of Medicine, Nankai University Tianjin, Tianjin, 300071, China
| | - Jianlin Cui
- Department of Molecular Pharmacology, School of Medicine, Nankai University Tianjin, Tianjin, 300071, China
| | - Jie Yan
- Department of Molecular Pharmacology, School of Medicine, Nankai University Tianjin, Tianjin, 300071, China
| | - Lei Cao
- Department of General Surgery, Tianjin Union Medical Center, Tianjin, 300122, China
| | - Zhongjie Pan
- Tianjin Union Medical Center, Tianjin, 300122, China
| | - Zhi Qi
- Department of Molecular Pharmacology, School of Medicine, Nankai University Tianjin, Tianjin, 300071, China
- Nankai University Eye Institute, Tianjin, 300071, China
- Tianjin Union Medical Center, Tianjin, 300122, China
- Xinjiang Production and Construction Corps Hospital, Xinjiang, 830002, China
| | - Liang Yang
- Department of Molecular Pharmacology, School of Medicine, Nankai University Tianjin, Tianjin, 300071, China
- Tianjin Union Medical Center, Tianjin, 300122, China
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Navneet S, Wilson K, Rohrer B. Müller Glial Cells in the Macula: Their Activation and Cell-Cell Interactions in Age-Related Macular Degeneration. Invest Ophthalmol Vis Sci 2024; 65:42. [PMID: 38416457 PMCID: PMC10910558 DOI: 10.1167/iovs.65.2.42] [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: 12/14/2023] [Accepted: 02/10/2024] [Indexed: 02/29/2024] Open
Abstract
Müller glia, the main glial cell of the retina, are critical for neuronal and vascular homeostasis in the retina. During age-related macular degeneration (AMD) pathogenesis, Müller glial activation, remodeling, and migrations are reported in the areas of retinal pigment epithelial (RPE) degeneration, photoreceptor loss, and choroidal neovascularization (CNV) lesions. Despite this evidence indicating glial activation localized to the regions of AMD pathogenesis, it is unclear whether these glial responses contribute to AMD pathology or occur merely as a bystander effect. In this review, we summarize how Müller glia are affected in AMD retinas and share a prospect on how Müller glial stress might directly contribute to the pathogenesis of AMD. The goal of this review is to highlight the need for future studies investigating the Müller cell's role in AMD. This may lead to a better understanding of AMD pathology, including the conversion from dry to wet AMD, which has no effective therapy currently and may shed light on drug intolerance and resistance to current treatments.
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Affiliation(s)
- Soumya Navneet
- Department of Ophthalmology, Medical University of South Carolina, Charleston, South Carolina, United States
| | - Kyrie Wilson
- Department of Ophthalmology, Medical University of South Carolina, Charleston, South Carolina, United States
| | - Bärbel Rohrer
- Department of Ophthalmology, Medical University of South Carolina, Charleston, South Carolina, United States
- Department of Neuroscience, Medical University of South Carolina, Charleston, South Carolina, United States
- Ralph H. Johnson VA Medical Center, Division of Research, Charleston, South Carolina, United States
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4
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Forini F, Nicolini G, Amato R, Balzan S, Saba A, Bertolini A, Andreucci E, Marracci S, Melecchi A, Terlizzi D, Zucchi R, Iervasi G, Lulli M, Casini G. Local modulation of thyroid hormone signaling in the retina affects the development of diabetic retinopathy. Biochim Biophys Acta Mol Basis Dis 2024; 1870:166892. [PMID: 37758065 DOI: 10.1016/j.bbadis.2023.166892] [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: 07/25/2023] [Revised: 09/05/2023] [Accepted: 09/19/2023] [Indexed: 10/01/2023]
Abstract
Thyroid hormone (TH) dyshomeostasis is associated with poor prognosis in acute and prolonged illness, but its role in diabetic retinopathy (DR) has never been investigated. Here, we characterized the TH system in the retinas of db/db mice and highlighted regulatory processes in MIO-M1 cells. In the db/db retinas, typical functional traits and molecular signatures of DR were paralleled by a tissue-restricted reduction of TH levels. A local condition of low T3 (LT3S) was also demonstrated, which was likely to be induced by deiodinase 3 (DIO3) upregulation, and by decreased expression of DIO2 and of TH receptors. Concurrently, T3-responsive genes, including mitochondrial markers and microRNAs (miR-133-3p, 338-3p and 29c-3p), were downregulated. In MIO-M1 cells, a feedback regulatory circuit was evidenced whereby miR-133-3p triggered the post-transcriptional repression of DIO3 in a T3-dependent manner, while high glucose (HG) led to DIO3 upregulation through a nuclear factor erythroid 2-related factor 2-hypoxia-inducible factor-1 pathway. Finally, an in vitro simulated condition of early LT3S and hyperglycemia correlated with reduced markers of both mitochondrial function and stress response, which was reverted by T3 replacement. Together, the data suggest that, in the early phases of DR, a DIO3-driven LT3S may be protective against retinal stress, while, in the chronic phase, it not only fails to limit HG-induced damage, but also increases cell vulnerability likely due to persistent mitochondrial dysfunction.
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Affiliation(s)
- Francesca Forini
- Institute of Clinical Physiology, National Research Council, Pisa, Italy.
| | | | - Rosario Amato
- Department of Biology, University of Pisa, Pisa, Italy.
| | - Silvana Balzan
- Institute of Clinical Physiology, National Research Council, Pisa, Italy
| | - Alessandro Saba
- Department of Surgical, Medical and Molecular Pathology and Critical Care Medicine, University of Pisa, Pisa, Italy; Interdepartmental Research Center Nutrafood "Nutraceuticals and Food for Health", University of Pisa, Pisa, Italy; Center for Instrument Sharing (CISUP), University of Pisa, Pisa, Italy.
| | - Andrea Bertolini
- Department of Surgical, Medical and Molecular Pathology and Critical Care Medicine, University of Pisa, Pisa, Italy.
| | - Elena Andreucci
- Department of Experimental and Clinical Biomedical Sciences "Mario Serio", University of Florence, Florence, Italy.
| | | | | | - Domiziana Terlizzi
- Institute of Clinical Physiology, National Research Council, Pisa, Italy
| | - Riccardo Zucchi
- Department of Surgical, Medical and Molecular Pathology and Critical Care Medicine, University of Pisa, Pisa, Italy.
| | - Giorgio Iervasi
- Department of Biomedical Sciences, National Research Council, Rome, Italy.
| | - Matteo Lulli
- Department of Experimental and Clinical Biomedical Sciences "Mario Serio", University of Florence, Florence, Italy.
| | - Giovanni Casini
- Department of Biology, University of Pisa, Pisa, Italy; Interdepartmental Research Center Nutrafood "Nutraceuticals and Food for Health", University of Pisa, Pisa, Italy; Center for Instrument Sharing (CISUP), University of Pisa, Pisa, Italy.
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5
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Chirumbolo S, Valdenassi L, Tirelli U, Ricevuti G, Pandolfi S, Vaiano F, Galoforo A, Loprete F, Simonetti V, Chierchia M, Bellardi D, Richelmi T, Franzini M. The Oxygen-Ozone Adjunct Medical Treatment According to the Protocols from the Italian Scientific Society of Oxygen-Ozone Therapy: How Ozone Applications in the Blood Can Influence Clinical Therapy Success via the Modulation of Cell Biology and Immunity. BIOLOGY 2023; 12:1512. [PMID: 38132338 PMCID: PMC10740843 DOI: 10.3390/biology12121512] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/30/2023] [Revised: 11/27/2023] [Accepted: 12/06/2023] [Indexed: 12/23/2023]
Abstract
BACKGROUND Ozone is an allotrope of oxygen whose use in medicine has rapidly grown in recent years. Ozonated blood allows for the use of ozone in a safe modality, as plasma and blood cells are endowed with an antioxidant system able to quench ozone's pro-oxidant property and to elicit the Nrf2/Kwap1/ARE pathway. METHODS We present two clinical studies, a case-series (six patients) observational study adopting ozone as a major autohemotherapy and topical ozone to address infected post-surgical wounds with multi-drug resistant bacteria and an observational study (250 patients) using ozonated blood for treating knee osteoarthritis. RESULTS Ozonated blood via major autohemotherapy reduced the extent of infections in wounds, reduced the inflammatory biomarkers by more than 75% and improved patients' QoL, whereas ozonated blood via minor autohemotherapy improved significantly (p < 0.001) WOMAC and Lequesne's parameters in knee osteoarthritis. CONCLUSIONS The models described, i.e., ozone autohemotherapy in wound antimicrobial treatment and ozonated blood in knee osteoarthrosis, following our protocols, share the outstanding ability of ozone to modulate the innate immune response and address bacterial clearance as well as inflammation and pain.
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Affiliation(s)
- Salvatore Chirumbolo
- Department of Engineering for Innovation Medicine, University of Verona, 37134 Verona, Italy
| | - Luigi Valdenassi
- Italian Scientific Society of Oxygen–Ozone Therapy (SIOOT), High Master School of Oxygen-Ozone Therapy, University of Pavia, 27100 Pavia, Italy; (L.V.); (S.P.); (F.V.); (A.G.); (F.L.); (V.S.); (M.C.); or (T.R.); (M.F.)
| | | | - Giovanni Ricevuti
- Department of Drug Science, University of Pavia, 27100 Pavia, Italy;
| | - Sergio Pandolfi
- Italian Scientific Society of Oxygen–Ozone Therapy (SIOOT), High Master School of Oxygen-Ozone Therapy, University of Pavia, 27100 Pavia, Italy; (L.V.); (S.P.); (F.V.); (A.G.); (F.L.); (V.S.); (M.C.); or (T.R.); (M.F.)
| | - Francesco Vaiano
- Italian Scientific Society of Oxygen–Ozone Therapy (SIOOT), High Master School of Oxygen-Ozone Therapy, University of Pavia, 27100 Pavia, Italy; (L.V.); (S.P.); (F.V.); (A.G.); (F.L.); (V.S.); (M.C.); or (T.R.); (M.F.)
| | - Antonio Galoforo
- Italian Scientific Society of Oxygen–Ozone Therapy (SIOOT), High Master School of Oxygen-Ozone Therapy, University of Pavia, 27100 Pavia, Italy; (L.V.); (S.P.); (F.V.); (A.G.); (F.L.); (V.S.); (M.C.); or (T.R.); (M.F.)
| | - Fortunato Loprete
- Italian Scientific Society of Oxygen–Ozone Therapy (SIOOT), High Master School of Oxygen-Ozone Therapy, University of Pavia, 27100 Pavia, Italy; (L.V.); (S.P.); (F.V.); (A.G.); (F.L.); (V.S.); (M.C.); or (T.R.); (M.F.)
| | - Vincenzo Simonetti
- Italian Scientific Society of Oxygen–Ozone Therapy (SIOOT), High Master School of Oxygen-Ozone Therapy, University of Pavia, 27100 Pavia, Italy; (L.V.); (S.P.); (F.V.); (A.G.); (F.L.); (V.S.); (M.C.); or (T.R.); (M.F.)
| | - Marianna Chierchia
- Italian Scientific Society of Oxygen–Ozone Therapy (SIOOT), High Master School of Oxygen-Ozone Therapy, University of Pavia, 27100 Pavia, Italy; (L.V.); (S.P.); (F.V.); (A.G.); (F.L.); (V.S.); (M.C.); or (T.R.); (M.F.)
| | | | - Tommaso Richelmi
- Italian Scientific Society of Oxygen–Ozone Therapy (SIOOT), High Master School of Oxygen-Ozone Therapy, University of Pavia, 27100 Pavia, Italy; (L.V.); (S.P.); (F.V.); (A.G.); (F.L.); (V.S.); (M.C.); or (T.R.); (M.F.)
| | - Marianno Franzini
- Italian Scientific Society of Oxygen–Ozone Therapy (SIOOT), High Master School of Oxygen-Ozone Therapy, University of Pavia, 27100 Pavia, Italy; (L.V.); (S.P.); (F.V.); (A.G.); (F.L.); (V.S.); (M.C.); or (T.R.); (M.F.)
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6
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Li S, Lu S, Wang L, Liu S, Zhang L, Du J, Wu Z, Huang X. Effects of amygdalin on ferroptosis and oxidative stress in diabetic retinopathy progression via the NRF2/ARE signaling pathway. Exp Eye Res 2023; 234:109569. [PMID: 37422064 DOI: 10.1016/j.exer.2023.109569] [Citation(s) in RCA: 9] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2022] [Revised: 05/31/2023] [Accepted: 07/05/2023] [Indexed: 07/10/2023]
Abstract
Oxidative stress has been involved in the pathogenesis of diabetic retinopathy (DR). Amygdalin is an effective component of bitter almond that exhibits excellent antioxidant properties. We explored the effects of amygdalin on ferroptosis and oxidative stress in high-glucose (HG)-stimulated human retinal endothelial cells (HRECs) via the NRF2/ARE pathway. HG-stimulated HRECs were used to establish a DR model. Cell viability was evaluated using the MTT assay. The release of lactate dehydrogenase was used to evaluate cell toxicity. The protein levels of NRF2, NQO1, and HO-1 were detected using western blotting. The GSH, GSSG, GPX4, SOD, CAT, MDA, and Fe2+ levels in the HRECs were also detected. Flow cytometry was used to detect reactive oxygen species (ROS) using a fluorescent probe. Immunofluorescence staining was performed to detect NRF2 expression. The results revealed that HG stimulation decreased the levels of GSH, GPX4, SOD, and CAT but increased those of MDA, ROS, GSSG, and Fe2+ in HRECs. Ferrostatin-1 treatment reversed the effects of HG stimulation, whereas erastin aggravated these effects. Amygdalin treatment relieved HG-induced injury in HRECs. Amygdalin treatment promoted the nuclear transport of NRF2 in HG-stimulated HRECs. NQO1 and HO-1 levels were upregulated in HG-stimulated HRECs after amygdalin treatment. An inhibitor of NRF2 reversed the effects of amygdalin. Therefore, amygdalin treatment inhibited ferroptosis and oxidative stress in HG-stimulated HRECs by activating the NRF2/ARE signaling pathway.
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Affiliation(s)
- Shuyan Li
- Department of Ophthalmology, Seventh People's Hospital of Shanghai University of Traditional Chinese Medicine, No. 358 Datong Road, Pudong New Area, Shanghai, 200137, China
| | - Shiheng Lu
- Department of Ophthalmolog, Shanghai Eye Diseases Prevention & Treatment Center/Shanghai Eye Hospital, No.380 Kangding Road, Shanghai, 200041, China
| | - Lei Wang
- Department of Ophthalmology, Seventh People's Hospital of Shanghai University of Traditional Chinese Medicine, No. 358 Datong Road, Pudong New Area, Shanghai, 200137, China
| | - Shasha Liu
- Clinical Research Center, He Eye Specialists Hospitals, No. 213, Southwest Road, Shahekou District, Dalian, 110000, Liaoning, China
| | - Lei Zhang
- Department of Ophthalmology, Seventh People's Hospital of Shanghai University of Traditional Chinese Medicine, No. 358 Datong Road, Pudong New Area, Shanghai, 200137, China
| | - Jialun Du
- Department of Ophthalmology, Seventh People's Hospital of Shanghai University of Traditional Chinese Medicine, No. 358 Datong Road, Pudong New Area, Shanghai, 200137, China
| | - Ziwen Wu
- Department of Ophthalmology, Seventh People's Hospital of Shanghai University of Traditional Chinese Medicine, No. 358 Datong Road, Pudong New Area, Shanghai, 200137, China
| | - Xiaojing Huang
- Department of Ophthalmology, Shanghai Pudong New Area Gongli Hospital, Lane 219#, Miaopu Road, Pudong New Area, Shanghai, 200135, China.
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7
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Sudhakaran G, Chandran A, Sreekutty AR, Madesh S, Pachaiappan R, Almutairi BO, Arokiyaraj S, Kari ZA, Tellez-Isaias G, Guru A, Arockiaraj J. Ophthalmic Intervention of Naringenin Decreases Vascular Endothelial Growth Factor by Counteracting Oxidative Stress and Cellular Damage in In Vivo Zebrafish. Molecules 2023; 28:5350. [PMID: 37513223 PMCID: PMC10385844 DOI: 10.3390/molecules28145350] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2023] [Revised: 07/06/2023] [Accepted: 07/07/2023] [Indexed: 07/30/2023] Open
Abstract
Diabetes Mellitus is a metabolic disease that leads to microvascular complications like Diabetic retinopathy (DR), a major cause of blindness worldwide. Current medications for DR are expensive and report multiple side effects; therefore, an alternative medication that alleviates the disease condition is required. An interventional approach targeting the vascular endothelial growth factor (VEGF) remains a treatment strategy for DR. Anti-VEGF medicines are being investigated as the main therapy for managing vision-threatening complications of DR, such as diabetic macular oedema. Therefore, this study investigated the effect of flavonoid naringenin (NG) from citrus fruits on inhibiting early DR in zebrafish. When exposed to 130 mM glucose, the zebrafish larvae developed a hyperglycaemic condition accompanied by oxidative stress, cellular damage, and lipid peroxidation. Similarly, when adult zebrafish were exposed to 4% Glucose, high glucose levels were observed in the ocular region and massive destruction in the retinal membrane. High glucose upregulated the expression of VEGF. In comparison, the co-exposure to NG inhibited oxidative stress and cellular damage and restored the glutathione levels in the ocular region of the zebrafish larvae. NG regressed the glucose levels and cellular damage along with an inhibition of macular degeneration in the retina of adult zebrafish and normalized the overexpression of VEGF as a promising strategy for treating DR. Therefore, intervention of NG could alleviate the domestication of alternative medicine in ophthalmic research.
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Affiliation(s)
- Gokul Sudhakaran
- Toxicology and Pharmacology Laboratory, Department of Biotechnology, Faculty of Science and Humanities, SRM Institute of Science and Technology, Kattankulathur 603203, India
| | - Abhirami Chandran
- Toxicology and Pharmacology Laboratory, Department of Biotechnology, Faculty of Science and Humanities, SRM Institute of Science and Technology, Kattankulathur 603203, India
| | - A R Sreekutty
- Toxicology and Pharmacology Laboratory, Department of Biotechnology, Faculty of Science and Humanities, SRM Institute of Science and Technology, Kattankulathur 603203, India
| | - S Madesh
- Toxicology and Pharmacology Laboratory, Department of Biotechnology, Faculty of Science and Humanities, SRM Institute of Science and Technology, Kattankulathur 603203, India
| | - Raman Pachaiappan
- Department of Biotechnology, School of Bioengineering, College of Engineering and Technology, SRM Institute of Science and Technology, Kattankulathur 603203, India
| | - Bader O Almutairi
- Department of Zoology, College of Science, King Saud University, P.O. Box 2455, Riyadh 11451, Saudi Arabia
| | - Selvaraj Arokiyaraj
- Department of Food Science & Biotechnology, Sejong University, Seoul 05006, Republic of Korea
| | - Zulhisyam Abdul Kari
- Department of Agricultural Sciences, Faculty of Agro-Based Industry, Universiti Malaysia Kelantan, Jeli Campus, Jeli 17600, Malaysia
- Advanced Livestock and Aquaculture Research Group, Faculty of Agro-Based Industry, Universiti Malaysia Kelantan, Jeli Campus, Jeli 17600, Malaysia
| | | | - Ajay Guru
- Department of Cardiology, Saveetha Dental College and Hospitals, SIMATS, Chennai 600077, India
| | - Jesu Arockiaraj
- Toxicology and Pharmacology Laboratory, Department of Biotechnology, Faculty of Science and Humanities, SRM Institute of Science and Technology, Kattankulathur 603203, India
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8
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Fanaro GB, Marques MR, Calaza KDC, Brito R, Pessoni AM, Mendonça HR, Lemos DEDA, de Brito Alves JL, de Souza EL, Cavalcanti Neto MP. New Insights on Dietary Polyphenols for the Management of Oxidative Stress and Neuroinflammation in Diabetic Retinopathy. Antioxidants (Basel) 2023; 12:1237. [PMID: 37371967 PMCID: PMC10295526 DOI: 10.3390/antiox12061237] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2023] [Revised: 06/05/2023] [Accepted: 06/06/2023] [Indexed: 06/29/2023] Open
Abstract
Diabetic retinopathy (DR) is a neurodegenerative and vascular pathology that is considered one of the leading causes of blindness worldwide, resulting from complications of advanced diabetes mellitus (DM). Current therapies consist of protocols aiming to alleviate the existing clinical signs associated with microvascular alterations limited to the advanced disease stages. In response to the low resolution and limitations of the DR treatment, there is an urgent need to develop more effective alternative therapies to optimize glycemic, vascular, and neuronal parameters, including the reduction in the cellular damage promoted by inflammation and oxidative stress. Recent evidence has shown that dietary polyphenols reduce oxidative and inflammatory parameters of various diseases by modulating multiple cell signaling pathways and gene expression, contributing to the improvement of several chronic diseases, including metabolic and neurodegenerative diseases. However, despite the growing evidence for the bioactivities of phenolic compounds, there is still a lack of data, especially from human studies, on the therapeutic potential of these substances. This review aims to comprehensively describe and clarify the effects of dietary phenolic compounds on the pathophysiological mechanisms involved in DR, especially those of oxidative and inflammatory nature, through evidence from experimental studies. Finally, the review highlights the potential of dietary phenolic compounds as a prophylactic and therapeutic strategy and the need for further clinical studies approaching the efficacy of these substances in DR management.
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Affiliation(s)
- Gustavo Bernardes Fanaro
- Institute of Health and Biotechnology, Federal University of Amazonas, Manaus 69460000, Amazonas, Brazil;
| | | | - Karin da Costa Calaza
- Department of Neurobiology, Institute of Biology, Fluminense Federal University, Niterói 24210201, Rio de Janeiro, Brazil;
| | - Rafael Brito
- Department of Cellular and Molecular Biology, Institute of Biology, Fluminense Federal University, Niterói 24210201, Rio de Janeiro, Brazil;
| | | | - Henrique Rocha Mendonça
- Institute of Biodiversity and Sustainability (NUPEM), Federal University of Rio de Janeiro, Macaé 27965045, Rio de Janeiro, Brazil; (H.R.M.); (M.P.C.N.)
| | | | - José Luiz de Brito Alves
- Department of Nutrition, Health Sciences Center, Federal University of Paraíba, João Pessoa 58051900, Paraíba, Brazil; (D.E.d.A.L.); (J.L.d.B.A.)
| | - Evandro Leite de Souza
- Department of Nutrition, Health Sciences Center, Federal University of Paraíba, João Pessoa 58051900, Paraíba, Brazil; (D.E.d.A.L.); (J.L.d.B.A.)
| | - Marinaldo Pacífico Cavalcanti Neto
- Institute of Biodiversity and Sustainability (NUPEM), Federal University of Rio de Janeiro, Macaé 27965045, Rio de Janeiro, Brazil; (H.R.M.); (M.P.C.N.)
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9
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Argaev-Frenkel L, Rosenzweig T. Redox Balance in Type 2 Diabetes: Therapeutic Potential and the Challenge of Antioxidant-Based Therapy. Antioxidants (Basel) 2023; 12:antiox12050994. [PMID: 37237860 DOI: 10.3390/antiox12050994] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2023] [Revised: 04/19/2023] [Accepted: 04/24/2023] [Indexed: 05/28/2023] Open
Abstract
Oxidative stress is an important factor in the development of type 2 diabetes (T2D) and associated complications. Unfortunately, most clinical studies have failed to provide sufficient evidence regarding the benefits of antioxidants (AOXs) in treating this disease. Based on the known complexity of reactive oxygen species (ROS) functions in both the physiology and pathophysiology of glucose homeostasis, it is suggested that inappropriate dosing leads to the failure of AOXs in T2D treatment. To support this hypothesis, the role of oxidative stress in the pathophysiology of T2D is described, together with a summary of the evidence for the failure of AOXs in the management of diabetes. A comparison of preclinical and clinical studies indicates that suboptimal dosing of AOXs might explain the lack of benefits of AOXs. Conversely, the possibility that glycemic control might be adversely affected by excess AOXs is also considered, based on the role of ROS in insulin signaling. We suggest that AOX therapy should be given in a personalized manner according to the need, which is the presence and severity of oxidative stress. With the development of gold-standard biomarkers for oxidative stress, optimization of AOX therapy may be achieved to maximize the therapeutic potential of these agents.
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Affiliation(s)
| | - Tovit Rosenzweig
- Department of Molecular Biology, Ariel University, Ariel 4070000, Israel
- Adison School of Medicine, Ariel University, Ariel 4070000, Israel
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10
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Li Y, Wang K, Zhu X, Cheng Z, Zhu L, Murray M, Zhou F. Ginkgo biloba extracts protect human retinal Müller glial cells from t-BHP induced oxidative damage by activating the AMPK-Nrf2-NQO-1 axis. J Pharm Pharmacol 2023; 75:385-396. [PMID: 36583518 DOI: 10.1093/jpp/rgac095] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2022] [Accepted: 11/25/2022] [Indexed: 12/31/2022]
Abstract
OBJECTIVES Retinal Müller glial cell loss is almost involved in all retinal diseases, especially diabetic retinopathy (DR). Oxidative stress significantly contributes to the development of Müller glial cell loss. Ginkgo biloba extracts (GBE) have been reported to possess antioxidant property, beneficial in treating human retinal diseases. However, little is known about its role in Müller glial cells. This study investigated the protective effect of GBE (prepared from ginkgo biloba dropping pills) in human Müller glial cells against tert-butyl hydroperoxide (t-BHP)-induced oxidative stress and its underlying molecular mechanism. METHODS MIO-M1 cells were pretreated with or without GBE prior to the exposure to t-BHP-induced oxidative stress. Cell viability, cell death profile and lipid peroxidation were subsequently assessed. Protein expression of the key anti-oxidative signalling factors were investigated. KEY FINDINGS We showed that GBE can effectively protect human MIO-M1 cells from t-BHP-induced oxidative injury by improving cell viability, reducing intracellular ROS accumulation and suppressing lipid peroxidation, which effect is likely mediated through activating AMPK-Nrf2-NQO-1 antioxidant respondent axis. CONCLUSIONS Our study is the first to reveal the great potentials of GBE in protecting human retinal Müller glial cell loss against oxidative stress. GBE might be used to prevent human retinal diseases particularly DR.
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Affiliation(s)
- Yue Li
- The University of Sydney, Sydney Pharmacy School, Faculty of Medicine and Health NSW, 2006, Australia
| | - Ke Wang
- Key Laboratory of Nuclear Medicine, Ministry of Health, Jiangsu Key Laboratory of Molecular Nuclear Medicine, Jiangsu Institute of Nuclear Medicine, Wuxi, Jiangsu Province, 214063, China
| | - Xue Zhu
- Key Laboratory of Nuclear Medicine, Ministry of Health, Jiangsu Key Laboratory of Molecular Nuclear Medicine, Jiangsu Institute of Nuclear Medicine, Wuxi, Jiangsu Province, 214063, China
| | - Zhengqi Cheng
- The University of Sydney, Sydney Pharmacy School, Faculty of Medicine and Health NSW, 2006, Australia.,Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, Guangzhou, Guangdong, China.,Bioland Laboratory (Guangzhou Regenerative Medicine and Health Guangdong Laboratory), Guangzhou, Guangdong, China
| | - Ling Zhu
- The University of Sydney, Save Sight Institute, Sydney, NSW, 2000, Australia
| | - Michael Murray
- The University of Sydney, Sydney Pharmacy School, Faculty of Medicine and Health NSW, 2006, Australia
| | - Fanfan Zhou
- The University of Sydney, Sydney Pharmacy School, Faculty of Medicine and Health NSW, 2006, Australia
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11
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Yang X, Huang Z, Xu M, Chen Y, Cao M, Yi G, Fu M. Autophagy in the retinal neurovascular unit: New perspectives into diabetic retinopathy. J Diabetes 2023; 15:382-396. [PMID: 36864557 PMCID: PMC10172025 DOI: 10.1111/1753-0407.13373] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/12/2022] [Revised: 02/08/2023] [Accepted: 02/18/2023] [Indexed: 03/04/2023] Open
Abstract
Diabetic retinopathy (DR) is one of the most prevalent retinal disorders worldwide, and it is a major cause of vision impairment in individuals of productive age. Research has demonstrated the significance of autophagy in DR, which is a critical intracellular homeostasis mechanism required for the destruction and recovery of cytoplasmic components. Autophagy maintains the physiological function of senescent and impaired organelles under stress situations, thereby regulating cell fate via various signals. As the retina's functional and fundamental unit, the retinal neurovascular unit (NVU) is critical in keeping the retinal environment's stability and supporting the needs of retinal metabolism. However, autophagy is essential for the normal NVU structure and function. We discuss the strong association between DR and autophagy in this review, as well as the many kinds of autophagy and its crucial physiological activities in the retina. By evaluating the pathological changes of retinal NVU in DR and the latest advancements in the molecular mechanisms of autophagy that may be involved in the pathophysiology of DR in NVU, we seek to propose new ideas and methods for the prevention and treatment of DR.
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Affiliation(s)
- Xiongyi Yang
- Zhujiang Hospital, Southern Medical University, Guangzhou, Guangdong, P. R. China
- The Second Clinical School, Southern Medical University, Guangzhou, Guangdong, P. R. China
| | - Zexin Huang
- Zhujiang Hospital, Southern Medical University, Guangzhou, Guangdong, P. R. China
- The Second Clinical School, Southern Medical University, Guangzhou, Guangdong, P. R. China
| | - Mei Xu
- The Second People's Hospital of Jingmen, Jingmen, Hubei, People's Republic of China
| | - Yanxia Chen
- Department of Ophthalmology, Zhujiang Hospital, Southern Medical University, Guangzhou, Guangdong, P. R. China
| | - Mingzhe Cao
- Department of Ophthalmology, The Seventh Affiliated Hospital, Sun Yat-Sen University, Shenzhen, P. R. China
| | - Guoguo Yi
- Department of Ophthalmology, The Sixth Affiliated Hospital, Sun Yat-Sen University, Guangzhou, Guangdong, P. R. China
| | - Min Fu
- Department of Ophthalmology, Zhujiang Hospital, Southern Medical University, Guangzhou, Guangdong, P. R. China
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12
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Perrone S, Manti S, Buttarelli L, Petrolini C, Boscarino G, Filonzi L, Gitto E, Esposito SMR, Nonnis Marzano F. Vascular Endothelial Growth Factor as Molecular Target for Bronchopulmonary Dysplasia Prevention in Very Low Birth Weight Infants. Int J Mol Sci 2023; 24:ijms24032729. [PMID: 36769049 PMCID: PMC9916882 DOI: 10.3390/ijms24032729] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2022] [Revised: 01/25/2023] [Accepted: 01/30/2023] [Indexed: 02/04/2023] Open
Abstract
Bronchopulmonary dysplasia (BPD) still represents an important burden of neonatal care. The definition of the disease is currently undergoing several revisions, and, to date, BPD is actually defined by its treatment rather than diagnostic or clinic criteria. BPD is associated with many prenatal and postnatal risk factors, such as maternal smoking, chorioamnionitis, intrauterine growth restriction (IUGR), patent ductus arteriosus (PDA), parenteral nutrition, sepsis, and mechanical ventilation. Various experimental models have shown how these factors cause distorted alveolar and vascular growth, as well as alterations in the composition and differentiation of the mesenchymal cells of a newborn's lungs, demonstrating a multifactorial pathogenesis of the disease. In addition, inflammation and oxidative stress are the common denominators of the mechanisms that contribute to BPD development. Vascular endothelial growth factor-A (VEGFA) constitutes the most prominent and best studied candidate for vascular development. Animal models have confirmed the important regulatory roles of epithelial-expressed VEGF in lung development and function. This educational review aims to discuss the inflammatory pathways in BPD onset for preterm newborns, focusing on the role of VEGFA and providing a summary of current and emerging evidence.
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Affiliation(s)
- Serafina Perrone
- Neonatology Unit, Pietro Barilla Children’s Hospital, Department of Medicine and Surgery, University of Parma, Via Gramsci 14, 43126 Parma, Italy
- Correspondence:
| | - Sara Manti
- Department of Human Pathology in Adult and Developmental Age “Gaetano Barresi”, Unirsity of Messina, Via Consolare Valeria 1, 98125 Messina, Italy
| | - Luca Buttarelli
- Neonatology Unit, Pietro Barilla Children’s Hospital, Department of Medicine and Surgery, University of Parma, Via Gramsci 14, 43126 Parma, Italy
| | - Chiara Petrolini
- Neonatology Unit, Pietro Barilla Children’s Hospital, Department of Medicine and Surgery, University of Parma, Via Gramsci 14, 43126 Parma, Italy
| | - Giovanni Boscarino
- Pediatric Clinic, Pietro Barilla Children’s Hospital, Department of Medicine and Surgery, University of Parma, Via Gramsci 14, 43126 Parma, Italy
| | - Laura Filonzi
- Department of Chemistry, Life Sciences and Environmental Sustainability, University of Parma, Viale delle Scienze 11, 43125 Parma, Italy
| | - Eloisa Gitto
- Department of Human Pathology in Adult and Developmental Age “Gaetano Barresi”, Unirsity of Messina, Via Consolare Valeria 1, 98125 Messina, Italy
| | - Susanna Maria Roberta Esposito
- Pediatric Clinic, Pietro Barilla Children’s Hospital, Department of Medicine and Surgery, University of Parma, Via Gramsci 14, 43126 Parma, Italy
| | - Francesco Nonnis Marzano
- Department of Chemistry, Life Sciences and Environmental Sustainability, University of Parma, Viale delle Scienze 11, 43125 Parma, Italy
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13
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SENP6-Mediated deSUMOylation of VEGFR2 Enhances Its Cell Membrane Transport in Angiogenesis. Int J Mol Sci 2023; 24:ijms24032544. [PMID: 36768878 PMCID: PMC9916989 DOI: 10.3390/ijms24032544] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2022] [Revised: 01/10/2023] [Accepted: 01/17/2023] [Indexed: 01/31/2023] Open
Abstract
Angiogenesis is a significant pathogenic characteristic of diabetic microangiopathy. Advanced glycation end products (AGEs) are considerably elevated in diabetic tissues and can affect vascular endothelial cell shape and function. Regulation of the vascular endothelial growth factor (VEGF)-VEGF receptor 2 (VEGFR2) signaling pathway is a critical mechanism in the regulation of angiogenesis, and VEGFR2 activity can be modified by post-translational changes. However, little research has been conducted on the control of small ubiquitin-related modifier (SUMO)-mediated VEGFR2 alterations. The current study investigated this using human umbilical vein endothelial cells (HUVECs) in conjunction with immunoblotting and immunofluorescence. AGEs increased Nrf2 translocation to the nucleus and promoted VEGFR2 expression. They also increased the expression of sentrin/SUMO-specific protease 6 (SENP6), which de-SUMOylated VEGFR2, and immunofluorescence indicated a reduction in VEGFR2 accumulation in the Golgi and increased VEGFR2 transport from the Golgi to the cell membrane surface via the coatomer protein complex subunit beta 2. VEGFR2 on the cell membrane was linked to VEGF generated by pericytes, triggering the VEGF signaling cascade. In conclusion, this study demonstrates that SENP6 regulates VEGFR2 trafficking from the Golgi to the endothelial cell surface. The SENP6-VEGFR2 pathway plays a critical role in pathological angiogenesis.
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14
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The retinal pigmentation pathway in human albinism: Not so black and white. Prog Retin Eye Res 2022; 91:101091. [PMID: 35729001 DOI: 10.1016/j.preteyeres.2022.101091] [Citation(s) in RCA: 15] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2022] [Revised: 05/24/2022] [Accepted: 05/26/2022] [Indexed: 12/16/2022]
Abstract
Albinism is a pigment disorder affecting eye, skin and/or hair. Patients usually have decreased melanin in affected tissues and suffer from severe visual abnormalities, including foveal hypoplasia and chiasmal misrouting. Combining our data with those of the literature, we propose a single functional genetic retinal signalling pathway that includes all 22 currently known human albinism disease genes. We hypothesise that defects affecting the genesis or function of different intra-cellular organelles, including melanosomes, cause syndromic forms of albinism (Hermansky-Pudlak (HPS) and Chediak-Higashi syndrome (CHS)). We put forward that specific melanosome impairments cause different forms of oculocutaneous albinism (OCA1-8). Further, we incorporate GPR143 that has been implicated in ocular albinism (OA1), characterised by a phenotype limited to the eye. Finally, we include the SLC38A8-associated disorder FHONDA that causes an even more restricted "albinism-related" ocular phenotype with foveal hypoplasia and chiasmal misrouting but without pigmentation defects. We propose the following retinal pigmentation pathway, with increasingly specific genetic and cellular defects causing an increasingly specific ocular phenotype: (HPS1-11/CHS: syndromic forms of albinism)-(OCA1-8: OCA)-(GPR143: OA1)-(SLC38A8: FHONDA). Beyond disease genes involvement, we also evaluate a range of (candidate) regulatory and signalling mechanisms affecting the activity of the pathway in retinal development, retinal pigmentation and albinism. We further suggest that the proposed pigmentation pathway is also involved in other retinal disorders, such as age-related macular degeneration. The hypotheses put forward in this report provide a framework for further systematic studies in albinism and melanin pigmentation disorders.
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15
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Karimi R, Bakhshi A, Dayati P, Abazari O, Shahidi M, Savaee M, Kafi E, Rahmanian M, Naghib SM. Silymarin reduces retinal microvascular damage in streptozotocin-induced diabetic rats. Sci Rep 2022; 12:15872. [PMID: 36151457 PMCID: PMC9508129 DOI: 10.1038/s41598-022-20297-2] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2022] [Accepted: 09/12/2022] [Indexed: 11/29/2022] Open
Abstract
Diabetic retinopathy is a severe microvascular problem in diabetes mellitus. Silymarin is a flavonoid compound, and according to previous studies, it is a bioactive compound with potent antioxidant and anti-inflammatory properties. This investigation aims to peruse the impact of silymarin against diabetic retinopathy in streptozotocin (STZ)-provoked rats. Thirty-two adult male Wistar rats were randomly allocated into the control group, STZ group, STZ + silymarin (50 mg/kg), and STZ + silymarin (100 mg/kg). STZ rats received silymarin every day until 2 months after diabetes induction. The serum and retinal tissues were collected 2 months after silymarin treatment to determine biochemical and molecular analyses. Silymarin markedly lowered the serum glucose concentration in diabetic rats. Silymarin reduced the increased levels of advanced glycosylated end products (AGEs), the receptors for AGEs (RAGE), and reactive oxygen species (ROS) in diabetic rats. Silymarin also attenuated the phosphorylation of p38 MAP kinase and nuclear factor (NF)-κB p65 and diminished diabetes-induced overexpression of inflammatory cytokines, vascular endothelial growth factor (VEGF), adhesion molecules, and extracellular matrix proteins in STZ rats. Our data suggested that silymarin has protective effects against diabetic retinopathy, which might be related to the inhibition of the AGEs/RAGE axis and its antioxidant and anti-inflammatory activities.
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Affiliation(s)
- Rahman Karimi
- Department of Cell & Molecular Biology, Faculty of Biological Sciences, Kharazmi University, Tehran, Iran
| | - Ali Bakhshi
- Department of Clinical Biochemistry, School of Medicine, Shahid Sadoughi University of Medical Sciences and Health Services, Yazd, Iran
| | - Parisa Dayati
- Department of Clinical Biochemistry, Faculty of Medical Sciences, Tarbiat Modares University, Tehran, Iran
| | - Omid Abazari
- Department of Clinical Biochemistry, School of Medicine, Shahid Sadoughi University of Medical Sciences and Health Services, Yazd, Iran
| | - Maryamsadat Shahidi
- Department of Clinical Biochemistry, School of Medicine, Shahid Sadoughi University of Medical Sciences and Health Services, Yazd, Iran
| | - Mohamadreza Savaee
- Department of Clinical Biochemistry, School of Medicine, Shahid Sadoughi University of Medical Sciences and Health Services, Yazd, Iran
| | - Ehsan Kafi
- Department of Clinical Biochemistry, School of Medicine, Shahid Sadoughi University of Medical Sciences and Health Services, Yazd, Iran
| | - Mehdi Rahmanian
- Biomaterials and Tissue Engineering Department, Breast Cancer Research Center, Motamed Cancer Institute, ACECR, Tehran, 1517964311, Iran
| | - Seyed Morteza Naghib
- Nanotechnology Department, School of Advanced Technologies, Iran University of Science and Technology (IUST), Tehran, Iran.
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16
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Optical Coherence Tomography Combined with Fluorescein Fundus Angiography under Intelligent Algorithm to Evaluate the Clinical Efficacy of Ranibizumab Combined with Panretinal Photocoagulation in the Treatment of Macular Edema of Diabetic Retinopathy Patients. COMPUTATIONAL AND MATHEMATICAL METHODS IN MEDICINE 2022; 2022:2933663. [PMID: 35547563 PMCID: PMC9085305 DOI: 10.1155/2022/2933663] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/15/2022] [Revised: 03/30/2022] [Accepted: 04/01/2022] [Indexed: 11/17/2022]
Abstract
This study aimed at investigating the clinical effect of ranibizumab combined with panretinal photocoagulation in the treatment of macular edema in diabetic retinopathy (DR) patients. A parametric deformation model was constructed, and based on this, it was evaluated using optical coherence tomography (OCT) combined with fluorescein fundus angiography (FFA). 56 DR patients (80 eyes) who needed surgery were selected for OCT and FFA scanning, and 0.5 mg ranibizumab was administered intravitreal injection before surgery. It should observe the OCT and FFA image characteristics of patients. In addition, the vision correction status before the surgery, 1 month, 3 months, and 6 months after the surgery, the thickness of the macular retina, operation time, the number of intraoperative electrocoagulation, and complications of patients were recorded. It was found that 82.85% of patients had improved visual acuity after surgery. Compared with preoperative, the average logarithm of the minimum angle of resolution (logMAR) of patients at 6 months after surgery increased significantly (
). With the increase of the grade of fibrosis and the grade of hemorrhage, the logMAR visual acuity recovery at 6 months after the surgery became worse; the macular retinal thickness at 6 months after the surgery decreased significantly (
). With the increase of the grade of fibrous proliferation and the grade of bleeding, the operation time, the number of electrocoagulation, and the possibility of iatrogenic holes of patient would increase. It can be known that ranibizumab combined with panretinal photocoagulation surgery could not only reduce the macular edema but also effectively reduce the intraoperative bleeding, simplify the removal of proliferative membranes, decrease the number of electrocoagulation, and shorten the operation time, enhancing the visual function of patients.
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17
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Firoz A, Talwar P. COVID-19 and Retinal Degenerative Diseases: Promising link “Kaempferol”. Curr Opin Pharmacol 2022; 64:102231. [PMID: 35544976 PMCID: PMC9080119 DOI: 10.1016/j.coph.2022.102231] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2021] [Revised: 03/10/2022] [Accepted: 03/24/2022] [Indexed: 01/18/2023]
Abstract
Coronavirus disease (COVID-19) outbreak has caused unprecedented global disruption since 2020. Approximately 238 million people are affected worldwide where the elderly succumb to mortality. Post-COVID syndrome and its side effects have popped up with several health hazards, such as macular degeneration and vision loss. It thus necessitates better medical care and management of our dietary practices. Natural flavonoids have been included in traditional medicine and have also been used safely against COVID-19 and several other diseases. Kaempferol is an essential flavonoid that has been demonstrated to influence several vital cellular signaling pathways involved in apoptosis, angiogenesis, inflammation, and autophagy. In this review, we emphasize the plausible regulatory effects of Kaempferol on hallmarks of COVID-19 and macular degeneration.
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18
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Carpi-Santos R, de Melo Reis RA, Gomes FCA, Calaza KC. Contribution of Müller Cells in the Diabetic Retinopathy Development: Focus on Oxidative Stress and Inflammation. Antioxidants (Basel) 2022; 11:antiox11040617. [PMID: 35453302 PMCID: PMC9027671 DOI: 10.3390/antiox11040617] [Citation(s) in RCA: 19] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2022] [Revised: 03/01/2022] [Accepted: 03/15/2022] [Indexed: 01/27/2023] Open
Abstract
Diabetic retinopathy is a neurovascular complication of diabetes and the main cause of vision loss in adults. Glial cells have a key role in maintenance of central nervous system homeostasis. In the retina, the predominant element is the Müller cell, a specialized cell with radial morphology that spans all retinal layers and influences the function of the entire retinal circuitry. Müller cells provide metabolic support, regulation of extracellular composition, synaptic activity control, structural organization of the blood–retina barrier, antioxidant activity, and trophic support, among other roles. Therefore, impairments of Müller actions lead to retinal malfunctions. Accordingly, increasing evidence indicates that Müller cells are affected in diabetic retinopathy and may contribute to the severity of the disease. Here, we will survey recently described alterations in Müller cell functions and cellular events that contribute to diabetic retinopathy, especially related to oxidative stress and inflammation. This review sheds light on Müller cells as potential therapeutic targets of this disease.
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Affiliation(s)
- Raul Carpi-Santos
- Instituto de Ciências Biomédicas, Universidade Federal do Rio de Janeiro, Rio de Janeiro 21941-902, RJ, Brazil; (R.C.-S.); (F.C.A.G.)
| | - Ricardo A. de Melo Reis
- Instituto de Biofísica Carlos Chagas Filho, Universidade Federal do Rio de Janeiro, Rio de Janeiro 21941-902, RJ, Brazil;
| | - Flávia Carvalho Alcantara Gomes
- Instituto de Ciências Biomédicas, Universidade Federal do Rio de Janeiro, Rio de Janeiro 21941-902, RJ, Brazil; (R.C.-S.); (F.C.A.G.)
| | - Karin C. Calaza
- Instituto de Biologia, Departamento de Neurobiologia, Universidade Federal Fluminense, Niteroi 24210-201, RJ, Brazil
- Correspondence:
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19
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Blann AD, Brown JE, Heitmar R. Angiogenesis, Metabolism, Endothelial and Platelet Markers in Diabetes and Cardiovascular Disease. Br J Biomed Sci 2022; 79:10313. [PMID: 35996503 PMCID: PMC9302542 DOI: 10.3389/bjbs.2022.10313] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2021] [Accepted: 02/15/2022] [Indexed: 12/31/2022]
Abstract
Introduction: Diabetes is a leading risk factor for cardiovascular disease (CVD), the pathophysiology of both being linked to metabolic, endothelial, renal, angiogenic and platelet abnormalities. We hypothesised that abnormalities in these systems are more adverse in those whose CVD is compounded by diabetes, compared to those with diabetes or CVD alone. Materials and methods: Serum or plasma from 66 patients with diabetes alone, 76 with CVD alone, and 70 with both diabetes and CVD i.e. diabetic cardiovascular disease, was probed for markers of angiogenesis [angiopoietin 1 and 2, vascular endothelial growth factor (VEGF) and endoglin], metabolic [soluble receptor for advanced glycation products (sRAGE), leptin, lipocalin-2, interleukin-8, and cystatin-C], the endothelium (von Willebrand factor, endothelial microparticles and soluble E selectin)], and the platelet (platelet microparticles and soluble P selectin) by ELISA, Luminex or flow cytometry. Results: VEGF (p = 0.04), von Willebrand factor (p = 0.001) and endothelial microparticles (p = 0.042) were all higher in diabetic cardiovascular disease than in diabetes alone and cardiovascular disease alone. Soluble E selectin was higher in diabetic cardiovascular disease than in diabetes alone (p = 0.045), whilst cystatin-C (p = 0.004) and soluble P selectin (p < 0.001) were higher in diabetes and diabetic cardiovascular disease than in cardiovascular disease alone. There were no differences in angiopoietin 1 or 2, endoglin, sRAGE, leptin, lipocalin-2, or interleukin-8. Conclusion: Angiopoietin 1 or 2, endoglin, sRAGE, leptin, lipocalin-2, interleukin-8, and cystatin-c cannot differentiate diabetes from cardiovascular disease, or both conditions combined. Our data point to a more adverse endothelial (von Willebrand factor, endothelial microparticles), and angiogenic profile (VEGF) in those with diabetic cardiovascular disease, supporting the view that this group should be targeted more aggressively.
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Affiliation(s)
- A. D. Blann
- School of Applied Sciences, Huddersfield University, Huddersfield, United Kingdom
- *Correspondence: A. D. Blann,
| | - J. E. Brown
- Department of Biosciences, College of Health and Life Sciences, Aston University, Birmingham, United Kingdom
| | - R. Heitmar
- School of Applied Sciences, Huddersfield University, Huddersfield, United Kingdom
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20
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Mezu-Ndubuisi OJ, Song YS, Macke E, Johnson H, Nwaba G, Ikeda A, Sheibani N. Retinopathy of prematurity shows alterations in Vegfa 164 isoform expression. Pediatr Res 2022; 91:1677-1685. [PMID: 34285351 PMCID: PMC8770670 DOI: 10.1038/s41390-021-01646-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/16/2021] [Revised: 05/27/2021] [Accepted: 06/13/2021] [Indexed: 11/24/2022]
Abstract
BACKGROUND Pathologic ocular neovascularization in retinopathy of prematurity (ROP) and other proliferative retinopathies are characterized by dysregulation of vascular endothelial growth factor-A (VEGF-A). A study of Vegfa isoform expression during oxygen-induced ischemic retinopathy (OIR) may enhance our understanding of Vegf dysregulation. METHODS Following induction of OIR, immunohistochemistry and polymerase chain reaction (PCR) was performed on room air (RA) and OIR mice. RESULTS Total Vegfa messenger RNA (mRNA) expression was stable in RA mice, but increased in OIR mice with a peak at postnatal day 17 (P17), before returning to RA levels. Vegfa164a expression was similar in both OIR and RA mice at P10 (Phase 1 OIR), but 2.4-fold higher in OIR mice compared to RA mice at P16 (Phase 2 OIR). At P10, Vegfa164b mRNA was similar in OIR vs RA mice, but was expressed 2.5-fold higher in OIR mice compared to RA mice at P16. At P10 and P16, Vegfr2/Vegfr1 expression was increased in OIR mice compared to RA mice. Increased activation of microglia was seen in OIR mice. CONCLUSIONS Vegfa164a, Vegfa164b, and Vegfr1 were overexpressed in OIR mice, leading to abnormal signaling and angiogenesis. Further studies of mechanisms of Vegf dysregulation may lead to novel therapies for ROP and other proliferative retinopathies. IMPACT Vegfa164 has two major isoforms, a proangiogenic, Vegfa164a, and an antiangiogenic, Vegfa164b, with opposing receptors, inhibitory Vegfr1, and stimulatory Vegfr2, but their role in OIR is unclear. In Phase 1 OIR, both isoforms and receptors are expressed similarly. In Phase 2 OIR, both isoforms are overexpressed, with an increased ratio of inhibitory Vegfr1. Modulation of angiogenesis by Vegf regulation enables pruning of excess angiogenesis during physiology, but results in ineffective angiogenesis during OIR. Knowledge of VEGF dysregulation may have novel therapeutic implications in the management of ROP and retinal proliferative diseases.
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Affiliation(s)
- Olachi J. Mezu-Ndubuisi
- grid.14003.360000 0001 2167 3675Department of Pediatrics, University of Wisconsin School of Medicine and Public Health, Madison, WI USA ,grid.14003.360000 0001 2167 3675Department of Ophthalmology and Visual Sciences, University of Wisconsin School of Medicine and Public Health, Madison, WI USA
| | - Yong-Seok Song
- grid.14003.360000 0001 2167 3675Department of Ophthalmology and Visual Sciences, University of Wisconsin School of Medicine and Public Health, Madison, WI USA
| | - Erica Macke
- grid.14003.360000 0001 2167 3675Department of Medical Genetics, University of Wisconsin-Madison, Madison, WI USA
| | - Hailey Johnson
- grid.14003.360000 0001 2167 3675Department of Pediatrics, University of Wisconsin School of Medicine and Public Health, Madison, WI USA
| | - Ginika Nwaba
- grid.152326.10000 0001 2264 7217Vanderbilt University, Nashville, TN USA
| | - Akihiro Ikeda
- grid.14003.360000 0001 2167 3675Department of Medical Genetics, University of Wisconsin-Madison, Madison, WI USA
| | - Nader Sheibani
- grid.14003.360000 0001 2167 3675Department of Ophthalmology and Visual Sciences, University of Wisconsin School of Medicine and Public Health, Madison, WI USA ,grid.14003.360000 0001 2167 3675Departments of Biomedical Engineering, and Cell and Regenerative Biology, University of Wisconsin School of Medicine and Public Health, Madison, WI USA
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21
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Saçaki CS, Mogharbel BF, Stricker PEF, Dziedzic DSM, Irioda AC, Perussolo MC, Somma AT, Montiani-Ferreira F, Moreno JCD, Dornbusch P, Sato M, Shiokawa N, de Noronha L, Nagashima S, Bacelar-Galdino M, Franco CRC, Abdelwahid E, Carvalho KAT. Potential of Human Neural Precursor Cells in Diabetic Retinopathy Therapeutics - Preclinical Model. Curr Eye Res 2021; 47:450-460. [PMID: 34749546 DOI: 10.1080/02713683.2021.2002909] [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: 10/19/2022]
Abstract
Purpose: This study aimed to evaluate a cell therapy strategy with human neural precursor cells (hNPCs) to treat diabetic retinopathy (DR) in Wistar rats induced to diabetes by injecting streptozotocin. Material and methods: Wharton's Jelly Mesenchymal stem cells (WJ-MSCs) were isolated, expanded, and seeded onto a biopolymer substrate to develop neurospheres and obtain the hNPCs. The animals were divided into three groups; non-diabetic (ND) n = four; diabetic without treatment (DM) n = nine; and diabetic with cell therapy (DM + hNPCs) n = nine. After eight weeks of diabetes induction and DR characteristics installed, intravitreal injection of hNPCs (1 x 106 cel/µL) was performed in the DM + hNPCs group. Optical Coherence Tomography (OCT) and Electroretinography (ERG) evaluations were before and during diabetes and after cell therapy. Four weeks post-treatment, histopathological and immunohistochemistry analyses were performed. Results: The repair of the retinal structures in the treated group (DM + hNPCs) was observed by increased thickness of neuroretinal layers, especially in the ganglion cell and photoreceptor layers, higher ERG oscillatory potentials (OPs) amplitudes, and transplanted hNPCs integration into the Retinal Pigment Epithelium. Conclusions: The results indicate that hNPCs reduced DR progression by a neuroprotective effect and promoted retinal repair, making them potential candidates for regenerating the neuroretinal tissue.
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Affiliation(s)
- Claudia Sayuri Saçaki
- Advanced Therapy and Cellular Biotechnology in Regenerative Medicine Department, The Pelé Pequeno Príncipe Research Institute, Child and Adolescent Health Research & Pequeno Príncipe Faculties, Curitiba, Brazil
| | - Bassam Felipe Mogharbel
- Advanced Therapy and Cellular Biotechnology in Regenerative Medicine Department, The Pelé Pequeno Príncipe Research Institute, Child and Adolescent Health Research & Pequeno Príncipe Faculties, Curitiba, Brazil
| | - Priscila Elias Ferreira Stricker
- Advanced Therapy and Cellular Biotechnology in Regenerative Medicine Department, The Pelé Pequeno Príncipe Research Institute, Child and Adolescent Health Research & Pequeno Príncipe Faculties, Curitiba, Brazil
| | - Dilcele Silva Moreira Dziedzic
- Advanced Therapy and Cellular Biotechnology in Regenerative Medicine Department, The Pelé Pequeno Príncipe Research Institute, Child and Adolescent Health Research & Pequeno Príncipe Faculties, Curitiba, Brazil
| | - Ana Carolina Irioda
- Advanced Therapy and Cellular Biotechnology in Regenerative Medicine Department, The Pelé Pequeno Príncipe Research Institute, Child and Adolescent Health Research & Pequeno Príncipe Faculties, Curitiba, Brazil
| | - Maiara Carolina Perussolo
- Advanced Therapy and Cellular Biotechnology in Regenerative Medicine Department, The Pelé Pequeno Príncipe Research Institute, Child and Adolescent Health Research & Pequeno Príncipe Faculties, Curitiba, Brazil
| | - André Tavares Somma
- Veterinary Medicine Department, Federal University of Paraná, Curitiba, Brazil
| | | | | | - Peterson Dornbusch
- Veterinary Medicine Department, Federal University of Paraná, Curitiba, Brazil
| | - Mário Sato
- Ophthalmology Department, Federal University of Paraná, Curitiba, Brazil
| | - Naoye Shiokawa
- Ophthalmology Department, Federal University of Paraná, Curitiba, Brazil
| | - Lúcia de Noronha
- Pathology Laboratory of Institute of Biological and Health Sciences of Pontifical Catholic University of Paraná (PUCPR), Curitiba, Brazil
| | - Seigo Nagashima
- Pathology Laboratory of Institute of Biological and Health Sciences of Pontifical Catholic University of Paraná (PUCPR), Curitiba, Brazil
| | | | | | - Eltyeb Abdelwahid
- Feinberg School of Medicine, Feinberg Cardiovascular Research Institute,Chicago, USA
| | - Katherine Athayde Teixeirade Carvalho
- Advanced Therapy and Cellular Biotechnology in Regenerative Medicine Department, The Pelé Pequeno Príncipe Research Institute, Child and Adolescent Health Research & Pequeno Príncipe Faculties, Curitiba, Brazil
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22
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Yan H, Yao P, Hu K, Li X, Li H. Long non-coding ribonucleic acid urothelial carcinoma-associated 1 promotes high glucose-induced human retinal endothelial cells angiogenesis through regulating micro-ribonucleic acid-624-3p/vascular endothelial growth factor C. J Diabetes Investig 2021; 12:1948-1957. [PMID: 34137197 PMCID: PMC8565426 DOI: 10.1111/jdi.13617] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/10/2020] [Revised: 05/20/2021] [Accepted: 05/26/2021] [Indexed: 12/17/2022] Open
Abstract
AIMS/INTRODUCTION Emerging evidence has indicated that long non-coding ribonucleic acids play important roles in the development and progression of diabetic retinopathy (DR). It is reported that urothelial carcinoma-associated 1 (UCA1) is highly expressed in diabetic lymphoendothelial cells and influences glucose metabolism in rats with DR. The aim of the present study was to explore the role of UCA1 in the mechanism of DR. MATERIALS AND METHODS Gene expression analyses in fibrovascular membranes excised from patients with DR using public microarray datasets (GSE60436). Reverse transcription polymerase chain reaction was carried out to detect UCA1, micro-ribonucleic acid (miR)-624-3p and vascular endothelial growth factor C (VEGF-C) expressions in the blood of patients and human retinal endothelial cells (HRECs). Furthermore, Cell Counting kit-8, Transwell assay, and tube formation assay were used to identify biological effects of UCA1 on HRECs proliferation, migration ability and angiogenesis in vitro. RESULTS UCA1 and VEGF-C were elevated in DR patients and high glucose-induced HRECs cell lines, whereas miR-624-3p was decreased. UCA1 inhibition inhibited proliferation, angiogenesis and migration of HRECs cells under high-glucose condition. Luciferase reporter assay showed that UCA1 could sponge with miR-624-3p, which could directly target VEGF-C. Finally, we proved a pathway that UCA1 promoted cell proliferation, migration and angiogenesis through sponging with miR-624-3p, thereby upregulating VEGF-C in high-glucose-induced HRECs. CONCLUSIONS We identified UCA1 as an important factor associated with DR, which could regulate the expression of VEGF-C by sponging miR-624-3p in human retinal endothelial cells. Our results pave the way for further studies on diagnostic and therapeutic studies related to UCA1 in DR patients.
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Affiliation(s)
- Huang Yan
- Ophthalmology DepartmentChongqing Yubei District People's HospitalChongqingChina
| | - Panpan Yao
- Department of OphthalmologyChangzheng HospitalNaval Medical UniversityShanghaiChina
| | - Ke Hu
- Ophthalmology Departmentthe First Affiliated Hospital of Chongqing Medical UniversityChongqingChina
| | - Xueyao Li
- Ophthalmology DepartmentChongqing Yubei District People's HospitalChongqingChina
| | - Hong Li
- Ophthalmology Departmentthe First Affiliated Hospital of Chongqing Medical UniversityChongqingChina
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23
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Rossino MG, Amato R, Amadio M, Rosini M, Basagni F, Cammalleri M, Dal Monte M, Casini G. A Nature-Inspired Nrf2 Activator Protects Retinal Explants from Oxidative Stress and Neurodegeneration. Antioxidants (Basel) 2021; 10:1296. [PMID: 34439544 PMCID: PMC8389314 DOI: 10.3390/antiox10081296] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2021] [Revised: 08/11/2021] [Accepted: 08/12/2021] [Indexed: 01/02/2023] Open
Abstract
Oxidative stress (OS) plays a key role in retinal dysfunctions and acts as a major trigger of inflammatory and neurodegenerative processes in several retinal diseases. To prevent OS-induced retinal damage, approaches based on the use of natural compounds are actively investigated. Recently, structural features from curcumin and diallyl sulfide have been combined in a nature-inspired hybrid (NIH1), which has been described to activate transcription nuclear factor erythroid-2-related factor-2 (Nrf2), the master regulator of the antioxidant response, in different cell lines. We tested the antioxidant properties of NIH1 in mouse retinal explants. NIH1 increased Nrf2 nuclear translocation, Nrf2 expression, and both antioxidant enzyme expression and protein levels after 24 h or six days of incubation. Possible toxic effects of NIH1 were excluded since it did not alter the expression of apoptotic or gliotic markers. In OS-treated retinal explants, NIH1 strengthened the antioxidant response inducing a massive and persistent expression of antioxidant enzymes up to six days of incubation. These effects resulted in prevention of the accumulation of reactive oxygen species, of apoptotic cell death, and of gliotic reactivity. Together, these data indicate that a strategy based on NIH1 to counteract OS could be effective for the treatment of retinal diseases.
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Affiliation(s)
- Maria Grazia Rossino
- Department of Biology, University of Pisa, 56126 Pisa, Italy; (M.G.R.); (R.A.); (M.C.)
| | - Rosario Amato
- Department of Biology, University of Pisa, 56126 Pisa, Italy; (M.G.R.); (R.A.); (M.C.)
| | - Marialaura Amadio
- Section of Pharmacology, Department of Drug Sciences, University of Pavia, 27100 Pavia, Italy;
| | - Michela Rosini
- Department of Pharmacy and Biotechnology, University of Bologna, 40126 Bologna, Italy; (M.R.); (F.B.)
| | - Filippo Basagni
- Department of Pharmacy and Biotechnology, University of Bologna, 40126 Bologna, Italy; (M.R.); (F.B.)
| | - Maurizio Cammalleri
- Department of Biology, University of Pisa, 56126 Pisa, Italy; (M.G.R.); (R.A.); (M.C.)
- Interdepartmental Research Center Nutrafood “Nutraceuticals and Food for Health”, University of Pisa, 56124 Pisa, Italy
| | - Massimo Dal Monte
- Department of Biology, University of Pisa, 56126 Pisa, Italy; (M.G.R.); (R.A.); (M.C.)
- Interdepartmental Research Center Nutrafood “Nutraceuticals and Food for Health”, University of Pisa, 56124 Pisa, Italy
| | - Giovanni Casini
- Department of Biology, University of Pisa, 56126 Pisa, Italy; (M.G.R.); (R.A.); (M.C.)
- Interdepartmental Research Center Nutrafood “Nutraceuticals and Food for Health”, University of Pisa, 56124 Pisa, Italy
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24
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Qi Y, Yao R, Zhang W, Cui Q. KAT1 triggers YTHDF2-mediated ITGB1 mRNA instability to alleviate the progression of diabetic retinopathy. Pharmacol Res 2021; 170:105713. [PMID: 34098071 DOI: 10.1016/j.phrs.2021.105713] [Citation(s) in RCA: 22] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/29/2021] [Revised: 06/01/2021] [Accepted: 06/02/2021] [Indexed: 01/17/2023]
Abstract
Diabetic retinopathy (DR) is a major complication of diabetes and a leading cause of blindness and visual impairment. This study focuses on the function of lysine acetyltransferase 1 (KAT1) in the progression of DR and the epigenetic mechanism. A mouse model with DR was induced by streptozotocin (STZ). Abundantly expressed genes in STZ-induced mice were analyzed. KAT1 was found to be significantly downregulated in the retinal tissues of model mice. Retinal microvascular endothelial cells (RMECs) and retinal Müller cells (rMCs) were cultured in high-glucose medium for in vitro studies. Upregulation of KAT1 suppressed inflammation, neovascularization, and vascular leakage in mouse retinal tissues, and it reduced the activity and inflammatory responses in rMCs, as well as the proliferation and metastatic potential of RMECs. KAT1 activated the transcription activity of YTHDF2 through histone acetylation of the promoter, and YTHDF2 triggered the instability of ITGB1 mRNA to induce mRNA degradation in an m6A manner. The activities of rMCs and RMECs were increased by sh-YTHDF2 but suppressed by sh-ITGB1. The FAK/PI3K/AKT signaling pathway was suppressed upon ITGB1 silencing. Collectively, this study demonstrated that KAT1 triggers YTHDF2-mediated ITGB1 mRNA instability to alleviate the progression of DR.
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Affiliation(s)
- Ying Qi
- Department of Ophthalmology, the First Affiliated Hospital of Zhengzhou University, the Laboratory for Ophthalmology and Vision Science, Henan Eye Hospital, Zhengzhou 450052, Henan, PR China.
| | - Renjie Yao
- Department of Ophthalmology, the First Affiliated Hospital of Zhengzhou University, the Laboratory for Ophthalmology and Vision Science, Henan Eye Hospital, Zhengzhou 450052, Henan, PR China
| | - Wenjing Zhang
- Department of Ophthalmology, the First Affiliated Hospital of Zhengzhou University, the Laboratory for Ophthalmology and Vision Science, Henan Eye Hospital, Zhengzhou 450052, Henan, PR China
| | - Qingqing Cui
- Department of Ophthalmology, the First Affiliated Hospital of Zhengzhou University, the Laboratory for Ophthalmology and Vision Science, Henan Eye Hospital, Zhengzhou 450052, Henan, PR China
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25
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TAK1 signaling is a potential therapeutic target for pathological angiogenesis. Angiogenesis 2021; 24:453-470. [PMID: 33973075 DOI: 10.1007/s10456-021-09787-5] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2021] [Accepted: 03/29/2021] [Indexed: 02/07/2023]
Abstract
Angiogenesis plays a critical role in both physiological responses and disease pathogenesis. Excessive angiogenesis can promote neoplastic diseases and retinopathies, while inadequate angiogenesis can lead to aberrant perfusion and impaired wound healing. Transforming growth factor β activated kinase 1 (TAK1), a member of the mitogen-activated protein kinase kinase kinase family, is a key modulator involved in a range of cellular functions including the immune responses, cell survival and death. TAK1 is activated in response to various stimuli such as proinflammatory cytokines, hypoxia, and oxidative stress. Emerging evidence has recently suggested that TAK1 is intimately involved in angiogenesis and mediates pathogenic processes related to angiogenesis. Several detailed mechanisms by which TAK1 regulates pathological angiogenesis have been clarified, and potential therapeutics targeting TAK1 have emerged. In this review, we summarize recent studies of TAK1 in angiogenesis and discuss the crosstalk between TAK1 and signaling pathways involved in pathological angiogenesis. We also discuss the approaches for selectively targeting TAK1 and highlight the rationales of therapeutic strategies based on TAK1 inhibition for the treatment of pathological angiogenesis.
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26
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Pugazhendhi A, Hubbell M, Jairam P, Ambati B. Neovascular Macular Degeneration: A Review of Etiology, Risk Factors, and Recent Advances in Research and Therapy. Int J Mol Sci 2021; 22:1170. [PMID: 33504013 PMCID: PMC7866170 DOI: 10.3390/ijms22031170] [Citation(s) in RCA: 36] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2020] [Revised: 01/11/2021] [Accepted: 01/19/2021] [Indexed: 12/14/2022] Open
Abstract
Neovascular age-related macular degeneration (exudative or wet AMD) is a prevalent, progressive retinal degenerative macular disease that is characterized by neovascularization of the choroid, mainly affecting the elderly population causing gradual vision impairment. Risk factors such as age, race, genetics, iris color, smoking, drinking, BMI, and diet all play a part in nvAMD's progression, with anti-vascular endothelial growth factor (anti-VEGF) therapy being the mainstay of treatment. Current therapeutic advancements slow the progression of the disease but do not cure or reverse its course. Newer therapies such as gene therapies, Rho-kinase inhibitors, and levodopa offer potential new targets for treatment.
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Affiliation(s)
- Arunbalaji Pugazhendhi
- Knights Campus for Accelerating Scientific Impact, University of Oregon, Eugene, OR 97403, USA; (A.P.); (M.H.)
| | - Margaret Hubbell
- Knights Campus for Accelerating Scientific Impact, University of Oregon, Eugene, OR 97403, USA; (A.P.); (M.H.)
| | - Pooja Jairam
- Vagelos College of Physicians & Surgeons, Columbia Irving Medical Center, Columbia University, New York, NY 10032, USA;
| | - Balamurali Ambati
- Knights Campus for Accelerating Scientific Impact, University of Oregon, Eugene, OR 97403, USA; (A.P.); (M.H.)
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