1
|
Dong XX, Chen DL, Miao YF, Li DL, Kai JY, Hu DN, Zhang XF, Lanca C, Grzybowski A, Pan CW. The impact of 25-hydroxyvitamin D and calcium on the risk of age-related macular degeneration: A Mendelian randomization study. Am J Clin Nutr 2024:S0002-9165(24)00590-2. [PMID: 38964658 DOI: 10.1016/j.ajcnut.2024.06.018] [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: 03/09/2024] [Revised: 06/20/2024] [Accepted: 06/28/2024] [Indexed: 07/06/2024] Open
Abstract
BACKGROUND The relationships between 25-hydroxyvitamin D (25(OH)D) and calcium and age-related macular degeneration (AMD) are unclear. OBJECTIVE This study aimed to investigate the causal role of 25(OH)D concentrations, calcium concentrations, and dietary supplements use of vitamin D and calcium on the risk of AMD and its subtypes. METHODS Independent genetic variants associated with 25(OH)D and calcium concentrations were used as instrumental variables in published genome-wide association studies (GWASs) of European ancestry. The bidirectional two-sample Mendelian randomization (MR) analyses were performed using summary-level data from the UK Biobank and FinnGen datasets. Sensitivity analyses were conducted to ensure the robustness of the MR results. The meta-analyses were conducted using both fixed-effect and random-effect models to provide comprehensive and reliable estimates. RESULTS A standard deviation increase in calcium concentrations was linked to a 14%, 17%, and 13% reduction in the likelihood of developing AMD (95% confidence interval [CI] = 0.77, 0.97), wet AMD (95% CI = 0.73, 0.95), and dry AMD (95% CI = 0.75, 1.00), respectively. No significant causal relationships were detected between genetically predicted 25(OH)D concentrations and AMD and its subtypes (all P > 0.05). The combined analyses showed that higher calcium concentrations were associated with a reduced risk of overall AMD, with an OR of 0.89 (95% CI = 0.81, 0.98). CONCLUSIONS This study provides evidence supporting the causal relationship between calcium concentrations and the risk of AMD and its subtypes, which may have important implications for the prevention, monitoring, and treatment of AMD.
Collapse
Affiliation(s)
- Xing-Xuan Dong
- School of Public Health, Suzhou Medical College of Soochow University, Suzhou, China
| | - Dong-Ling Chen
- School of Public Health, Suzhou Medical College of Soochow University, Suzhou, China
| | - Yi-Fan Miao
- School of Public Health, Suzhou Medical College of Soochow University, Suzhou, China
| | - Dan-Lin Li
- School of Public Health, Suzhou Medical College of Soochow University, Suzhou, China
| | - Jia-Yan Kai
- School of Public Health, Suzhou Medical College of Soochow University, Suzhou, China
| | - Dan-Ning Hu
- New York Eye and Ear Infirmary of Mount Sinai, Icahn School of Medicine at Mount Sinai, New York City, New York, USA
| | - Xiao-Feng Zhang
- Department of Ophthalmology, The Fourth Affiliated Hospital of Soochow University, Suzhou, China
| | - Carla Lanca
- Escola Superior de Tecnologia da Saúde de Lisboa (ESTeSL), Instituto Politécnico de Lisboa, Lisboa, Portugal; Comprehensive Health Research Center (CHRC), Escola Nacional de Saúde Pública, Universidade Nova de Lisboa, Lisboa, Portugal
| | - Andrzej Grzybowski
- Institute for Research in Ophthalmology, Foundation for Ophthalmology Development, Poznan, Poland
| | - Chen-Wei Pan
- School of Public Health, Suzhou Medical College of Soochow University, Suzhou, China.
| |
Collapse
|
2
|
Arif W, Narendran S, Kannan NB, Ramasamy K, Veerappan M, Chidambaranathan GP. Age-related reduction in the functional properties of adult stem cells located in the peripheral region of human retinal pigment epithelium. Indian J Ophthalmol 2024; 72:S688-S695. [PMID: 38623706 DOI: 10.4103/ijo.ijo_2491_23] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2023] [Accepted: 01/15/2024] [Indexed: 04/17/2024] Open
Abstract
PURPOSE Adult stem cells (SCs) with self-renewal and multilineage potential have been reported upon culturing human retinal pigment epithelial (RPE) cells. The current study aimed to identify the location of SCs in human RPE and to elucidate the age-related changes. METHODS Peripheral, equatorial, and central RPE cells from donors of three age groups were analyzed for their sphere-forming, clonal, and label-retaining cell properties. Furthermore, native human RPE flatmounts were immunostained for SC and proliferating cell markers. RESULTS Cells with higher sphere-forming and clonal ability were identified only in young donors (<30 years) and were restricted to the periphery. Upon culturing, cells from peripheral and equatorial regions had the label-retaining cell (LRC) property. With aging, the LRCs were restricted to the periphery and were reduced. In young donors, Ki67 + proliferating cells were not observed in native RPE. However, such cells were observed in the peripheral RPE of older donors correlating with the need for regeneration. The native RPE cells were negative for SC marker expression. CONCLUSION The above findings highlighted the presence of SCs with the ability to proliferate in the peripheral RPE and a reduction in these functional properties of SCs with aging.
Collapse
Affiliation(s)
- Waseema Arif
- Department of Immunology and Stem Cell Biology, Aravind Medical Research Foundation, Madurai, Tamil Nadu, India
- Department of Biotechnology, Aravind Medical Research Foundation -Affiliated to Alagappa University, Karaikudi, Tamil Nadu, India
- Unit of One Health, ICMR- Vector Control Research Centre, Puducherry, India
| | | | - Naresh Babu Kannan
- Retina and Vitreous Services, Aravind Eye Hospital and Post Graduate Institute of Ophthalmology, Madurai, Tamil Nadu, India
| | - Kim Ramasamy
- Retina and Vitreous Services, Aravind Eye Hospital and Post Graduate Institute of Ophthalmology, Madurai, Tamil Nadu, India
| | - Muthukkaruppan Veerappan
- Department of Immunology and Stem Cell Biology, Aravind Medical Research Foundation, Madurai, Tamil Nadu, India
| | - Gowri Priya Chidambaranathan
- Department of Immunology and Stem Cell Biology, Aravind Medical Research Foundation, Madurai, Tamil Nadu, India
- Department of Biotechnology, Aravind Medical Research Foundation -Affiliated to Alagappa University, Karaikudi, Tamil Nadu, India
| |
Collapse
|
3
|
Ma C, Li H, Lu S, Li X. The Role and Therapeutic Potential of Melatonin in Degenerative Fundus Diseases: Diabetes Retinopathy and Age-Related Macular Degeneration. Drug Des Devel Ther 2024; 18:2329-2346. [PMID: 38911030 PMCID: PMC11193467 DOI: 10.2147/dddt.s471525] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2024] [Accepted: 06/13/2024] [Indexed: 06/25/2024] Open
Abstract
Degenerative fundus disease encompasses a spectrum of ocular diseases, including diabetic retinopathy (DR) and age-related macular degeneration (AMD), which are major contributors to visual impairment and blindness worldwide. The development and implementation of effective strategies for managing and preventing the onset and progression of these diseases are crucial for preserving patients' visual acuity. Melatonin, a neurohormone primarily produced by the pineal gland, exhibits properties such as circadian rhythm modulation, antioxidant activity, anti-inflammatory effects, and neuroprotection within the ocular environment. Furthermore, melatonin has been shown to suppress neovascularization and reduce vascular leakage, both of which are critical in the pathogenesis of degenerative fundus lesions. Consequently, melatonin emerges as a promising therapeutic candidate for degenerative ocular diseases. This review provides a comprehensive overview of melatonin synthesis, its localization within ocular tissues, and its mechanisms of action, particularly in regulating melatonin production, thereby underscoring its potential as a therapeutic agent for degenerative fundus diseases.
Collapse
Affiliation(s)
- Chao Ma
- Department of Ophthalmology, the First Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan, People’s Republic of China
| | - Haoyu Li
- Department of Ophthalmology, the Second Xiangya Hospital, Central South University, Changsha, Hunan, People’s Republic of China
- Hunan Clinical Research Centre of Ophthalmic Disease, Changsha, Hunan, People’s Republic of China
| | - Shuwen Lu
- Department of Ophthalmology, the First Affiliated Hospital of Henan University of Chinese Medicine, Zhengzhou, Henan, People’s Republic of China
| | - Xian Li
- Manchester Royal Eye Hospital, Manchester University NHS Foundation Trust, Manchester, UK
- Division of Pharmacy and Optometry, School of Health Sciences, Faculty of Biology, Medicine and Health, The University of Manchester, Manchester, UK
| |
Collapse
|
4
|
Wheeler S, Mahmoudzadeh R, Randolph J. Treatment for dry age-related macular degeneration: where we stand in 2024. Curr Opin Ophthalmol 2024:00055735-990000000-00176. [PMID: 38869976 DOI: 10.1097/icu.0000000000001064] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/15/2024]
Abstract
PURPOSE OF REVIEW This review highlights treatment options, both under investigation and currently available, for the treatment of dry age-related macular degeneration (AMD). An update on current clinical studies for dry AMD has been summarized. RECENT FINDINGS Advanced dry AMD, characterized by geographic atrophy (GA), is a leading cause of blindness in the developed world, though prior to 2023 there was no approved treatment. There are now two approved treatments in the United States for GA. Additionally, there are several studies and trials to investigate therapeutic potential and effects of therapies for earlier intervention in dry AMD. Approaches to therapy include inhibiting the complement system, utilizing gene therapy, stem cell therapy, laser therapy, and surgical implants. SUMMARY While there has been notable prior advancement in the treatment for neovascular or wet AMD, for the first time there are Food and Drug Administration (FDA) approved treatments for GA. Clinical studies have shown promise for additional methods for managing dry AMD both medically and surgically.
Collapse
Affiliation(s)
| | - Raziyeh Mahmoudzadeh
- Virginia Commonwealth University Department of Ophthalmology, Richmond, Virginia, USA
| | - Jessica Randolph
- Virginia Commonwealth University Department of Ophthalmology, Richmond, Virginia, USA
| |
Collapse
|
5
|
Xiong M, Yu C, Ren B, Zhong M, Lu J, Yuan C, Sun Q, Peng Q, Zeng M, Song H. Global trends in oxidative stress in the Retina: A bibliometric analysis of 2013-2023. Heliyon 2024; 10:e31620. [PMID: 38831806 PMCID: PMC11145483 DOI: 10.1016/j.heliyon.2024.e31620] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2024] [Revised: 04/18/2024] [Accepted: 05/20/2024] [Indexed: 06/05/2024] Open
Abstract
Background Oxidative stress plays a significant role in the pathogenesis of many retinal diseases. However, only a few systematic bibliometric studies have been conducted. This study aims to visualize research hotspots and developmental trends in oxidative stress in the retina from 2013 to 2023 by analyzing bibliometric data. Methods We retrieved papers on oxidative stress in the retina published between 2013 and 2023 from the Web of Science Core Collection. The data were visually analyzed using CiteSpace and VOSviewer software. Results The total number of 2100 publications were included in the analysis. An overall increasing trend in the number of publications is observed between 2013 and 2023. Chinese publications were the most contributive, but United States publications were the most influential. Shanghai Jiao Tong University was the most active and prolific institution. Antioxidants was the most productive journal, while Oxidative Medicine and Cellular Longevity were the journals with the most-cited articles. Kaarniranta K, from Finland, was the most productive and influential author. Examination of co-cited references revealed that researchers in the field are primarily focused on investigating the molecular mechanisms, preventive strategies, and utilization of antioxidants to address retinal oxidative damage. Diabetic retinopathy, endothelial growth factor, retinitis pigmentosa, retinal degeneration, antioxidant response, retinal ganglion cells, and genes are the research hotspots in this field. Metabolism, sodium iodate, and system are at the forefront of research in this field. Conclusion Attention toward retinal oxidative stress has increased over the past decade. Current research focuses on the mechanisms of retinal diseases related to oxidative stress and the experimental study of antioxidants in retinal diseases, which may continue to be a trend in the future.
Collapse
Affiliation(s)
- Meng Xiong
- Hunan Provincial Key Laboratory of Traditional Chinese Medicine Diagnostics, Hunan University of Chinese Medicine, Changsha, Hunan, China
- School of Traditional Chinese Medicine, Hunan University of Chinese Medicine, Changsha, Hunan, China
| | - Chang Yu
- Hunan Provincial Key Laboratory of Traditional Chinese Medicine Diagnostics, Hunan University of Chinese Medicine, Changsha, Hunan, China
- School of Traditional Chinese Medicine, Hunan University of Chinese Medicine, Changsha, Hunan, China
| | - Baoping Ren
- Hunan Provincial Key Laboratory of Traditional Chinese Medicine Diagnostics, Hunan University of Chinese Medicine, Changsha, Hunan, China
- School of Traditional Chinese Medicine, Hunan University of Chinese Medicine, Changsha, Hunan, China
| | - Meiqi Zhong
- Hunan Provincial Key Laboratory of Traditional Chinese Medicine Diagnostics, Hunan University of Chinese Medicine, Changsha, Hunan, China
- School of Traditional Chinese Medicine, Hunan University of Chinese Medicine, Changsha, Hunan, China
| | - Jing Lu
- Hunan Provincial Key Laboratory for Prevention and Treatment of Ophthalmology and Otolaryngology Diseases with Chinese Medicine, Hunan University of Chinese Medicine, Changsha, Hunan, China
- School of Medicine, Hunan University of Chinese Medicine, Changsha, Hunan, China
| | - Chengzhi Yuan
- Hunan Provincial Key Laboratory of Traditional Chinese Medicine Diagnostics, Hunan University of Chinese Medicine, Changsha, Hunan, China
- School of Medicine, Hunan University of Chinese Medicine, Changsha, Hunan, China
| | - Qifang Sun
- Hunan Provincial Key Laboratory of Traditional Chinese Medicine Diagnostics, Hunan University of Chinese Medicine, Changsha, Hunan, China
- School of Traditional Chinese Medicine, Hunan University of Chinese Medicine, Changsha, Hunan, China
| | - Qinghua Peng
- Hunan Provincial Key Laboratory for Prevention and Treatment of Ophthalmology and Otolaryngology Diseases with Chinese Medicine, Hunan University of Chinese Medicine, Changsha, Hunan, China
| | - Meiyan Zeng
- School of Traditional Chinese Medicine, Hunan University of Chinese Medicine, Changsha, Hunan, China
| | - Houpan Song
- Hunan Provincial Key Laboratory of Traditional Chinese Medicine Diagnostics, Hunan University of Chinese Medicine, Changsha, Hunan, China
- School of Traditional Chinese Medicine, Hunan University of Chinese Medicine, Changsha, Hunan, China
- Hunan Provincial Key Laboratory for Prevention and Treatment of Ophthalmology and Otolaryngology Diseases with Chinese Medicine, Hunan University of Chinese Medicine, Changsha, Hunan, China
| |
Collapse
|
6
|
Shakeel L, Khan A, Akilimali A. "Izervay (avacincaptad pegol): paving the way for vision preservation in geographic atrophy". Ann Med Surg (Lond) 2024; 86:2413-2416. [PMID: 38694318 PMCID: PMC11060312 DOI: 10.1097/ms9.0000000000002021] [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: 11/07/2023] [Accepted: 03/22/2024] [Indexed: 05/04/2024] Open
Abstract
Age-related macular degeneration (AMD) is a progressive retinal disease that primarily affects the macula, leading to central vision loss and impaired color vision. Among its most severe forms is geographic atrophy (GA), which results in irreversible central blindness. While numerous risk factors, including age, smoking, and genetics, contribute to the development of AMD, effective treatment options for GA have been limited. This article centers on Izervay [avacincaptad pegol (ACP)], an FDA-approved drug designed to address the unmet medical needs of patients with GA secondary to AMD. The pathophysiology of GA involves oxidative damage, chronic inflammation, and cell death, primarily due to complement system dysregulation. Previous treatments for GA have shown limited efficacy, leaving patients searching for more effective solutions. Izervay, with its unique mechanism of action, inhibits complement protein C5, disrupting the formation of the membrane attack complex and slowing retinal cell degeneration. Clinical trials have demonstrated Izervay's ability to significantly reduce the growth of GA lesions, offering hope for improved outcomes. Additionally, the drug has exhibited a tolerable safety profile, with common side effects including conjunctival hemorrhage and increased intraocular pressure. Izervay represents a breakthrough in AMD treatment, offering the potential to preserve vision in those at risk of irreversible vision loss due to GA. While further research is necessary to evaluate long-term efficacy and accessibility, its approval opens new possibilities in AMD management, transforming the lives of individuals affected by this condition.
Collapse
Affiliation(s)
- Laiba Shakeel
- Department of Internal Medicine, Dow University of Health Sciences, Karachi, Pakistan
| | - Afsheen Khan
- Department of Internal Medicine, Dow University of Health Sciences, Karachi, Pakistan
| | - Aymar Akilimali
- Department of Research, Medical Research Circle (MedReC), Bukavu, Democratic Republic of Congo
| |
Collapse
|
7
|
Liu K, Zhang X, Liu R, Su W, Song Y, Tan M. Preparation of Lutein Nanoparticles by Glycosylation of Saccharides and Casein for Protecting Retinal Pigment Epithelial Cells. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2024; 72:6347-6359. [PMID: 38408187 DOI: 10.1021/acs.jafc.3c09054] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/28/2024]
Abstract
Age-related macular degeneration (AMD), a leading cause of visual impairment in the aging population, lacks effective treatment options due to a limited understanding of its pathogenesis. Lutein, with its strong antioxidant properties and ability to mitigate AMD by absorbing ultraviolet (UV) rays, faces challenges related to its stability and bioavailability in functional foods. In this study, we aimed to develop delivery systems using protein-saccharide conjugates to enhance lutein delivery and protect adult retinal pigment epithelial (ARPE-19) cells against sodium iodate (NaIO3)-induced damage. Various saccharides, including mannose, galactose, lactose, maltose, dextran, and maltodextrin, were conjugated to casein via the Maillard reaction for lutein delivery. The resulting lutein-loaded nanoparticles exhibited small size and spherical characteristics and demonstrated improved thermal stability and antioxidant capacity compared to free lutein. Notably, these nanoparticles were found to be nontoxic, as evidenced by reduced levels of cellular reactive oxygen species production (167.50 ± 3.81, 119.57 ± 3.45, 195.15 ± 1.41, 183.96 ± 3.11, 254.21 ± 3.97, 283.56 ± 7.27%) and inhibition of the mitochondrial membrane potential decrease (58.60 ± 0.29, 65.05 ± 2.91, 38.88 ± 1.81, 42.95 ± 1.39, 23.52 ± 1.04, 25.24 ± 0.08%) caused by NaIO3, providing protection against cellular damage and death. Collectively, our findings suggest that lutein-loaded nanoparticles synthesized via the Maillard reaction hold promise for enhanced solubility, oral bioavailability, and biological efficacy in the treatment of AMD.
Collapse
Affiliation(s)
- Kangjing Liu
- State Key Laboratory of Marine Food Processing and Safety Control, Dalian Polytechnic University, Dalian 116034, Liaoning, China
- Academy of Food Interdisciplinary Science, School of Food Science and Technology, Dalian Polytechnic University, Dalian 116034, Liaoning, China
- National Engineering Research Center of Seafood, Dalian Polytechnic University, Dalian 116034, Liaoning, China
- Collaborative Innovation Center of Seafood Deep Processing, Dalian Polytechnic University, Dalian 116034, China
| | - Xiumin Zhang
- State Key Laboratory of Marine Food Processing and Safety Control, Dalian Polytechnic University, Dalian 116034, Liaoning, China
- Academy of Food Interdisciplinary Science, School of Food Science and Technology, Dalian Polytechnic University, Dalian 116034, Liaoning, China
- National Engineering Research Center of Seafood, Dalian Polytechnic University, Dalian 116034, Liaoning, China
- Collaborative Innovation Center of Seafood Deep Processing, Dalian Polytechnic University, Dalian 116034, China
| | - Ronggang Liu
- State Key Laboratory of Marine Food Processing and Safety Control, Dalian Polytechnic University, Dalian 116034, Liaoning, China
- Academy of Food Interdisciplinary Science, School of Food Science and Technology, Dalian Polytechnic University, Dalian 116034, Liaoning, China
- National Engineering Research Center of Seafood, Dalian Polytechnic University, Dalian 116034, Liaoning, China
- Collaborative Innovation Center of Seafood Deep Processing, Dalian Polytechnic University, Dalian 116034, China
| | - Wentao Su
- State Key Laboratory of Marine Food Processing and Safety Control, Dalian Polytechnic University, Dalian 116034, Liaoning, China
- Academy of Food Interdisciplinary Science, School of Food Science and Technology, Dalian Polytechnic University, Dalian 116034, Liaoning, China
- National Engineering Research Center of Seafood, Dalian Polytechnic University, Dalian 116034, Liaoning, China
- Collaborative Innovation Center of Seafood Deep Processing, Dalian Polytechnic University, Dalian 116034, China
| | - Yukun Song
- State Key Laboratory of Marine Food Processing and Safety Control, Dalian Polytechnic University, Dalian 116034, Liaoning, China
- Academy of Food Interdisciplinary Science, School of Food Science and Technology, Dalian Polytechnic University, Dalian 116034, Liaoning, China
- National Engineering Research Center of Seafood, Dalian Polytechnic University, Dalian 116034, Liaoning, China
- Collaborative Innovation Center of Seafood Deep Processing, Dalian Polytechnic University, Dalian 116034, China
| | - Mingqian Tan
- State Key Laboratory of Marine Food Processing and Safety Control, Dalian Polytechnic University, Dalian 116034, Liaoning, China
- Academy of Food Interdisciplinary Science, School of Food Science and Technology, Dalian Polytechnic University, Dalian 116034, Liaoning, China
- National Engineering Research Center of Seafood, Dalian Polytechnic University, Dalian 116034, Liaoning, China
- Collaborative Innovation Center of Seafood Deep Processing, Dalian Polytechnic University, Dalian 116034, China
| |
Collapse
|
8
|
Han JED, Subramanian A, Lee WH, Coker J, Denniston AK, Nirantharakumar K, Adderley NJ. Association of sildenafil use with age-related macular degeneration: a retrospective cohort study. BMJ Open Ophthalmol 2024; 9:e001525. [PMID: 38490689 PMCID: PMC10946355 DOI: 10.1136/bmjophth-2023-001525] [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: 10/05/2023] [Accepted: 03/06/2024] [Indexed: 03/17/2024] Open
Abstract
OBJECTIVE Despite significant advances in clinical care and understanding of the underlying pathophysiology, age-related macular degeneration (AMD)-a major cause of global blindness-lacks effective treatment to prevent the irreversible degeneration of photoreceptors leading to central vision loss. Limited studies suggest phosphodiesterase type 5 (PDE5) inhibitors, such as sildenafil, may prevent AMD by increasing retinal blood flow. This study explores the potential association between sildenafil use and AMD risk in men with erectile dysfunction using UK data. METHODS AND ANALYSIS Using the UK's IQVIA Medical Research Data, the study analysed 31 575 men prescribed sildenafil for erectile dysfunction and no AMD history from 2007 to 2015, matched with a comparator group of 62 155 non-sildenafil users in a 1:2 ratio, over a median follow-up of approximately three years. RESULTS The primary outcome was the incidence of AMD in the two groups. The study found no significant difference in AMD incidence between the sildenafil users and the non-users, with an adjusted hazard ratio (HR) of 0.99 (95% CI 0.84 to 1.16), after accounting for confounders such as age, ethnicity, Townsend deprivation quintile, body mass index category, and diagnosis of hypertension and type 2 diabetes. CONCLUSION The study results indicated no significant association between sildenafil use and AMD prevention in UK men with erectile dysfunction, suggesting sildenafil's protective effect on AMD is likely insignificant.
Collapse
Affiliation(s)
- Ji Eun Diana Han
- Institute of Applied Health Research, University of Birmingham, Birmingham, UK
| | | | - Wen Hwa Lee
- Action Against Age-Related Macular Degeneration, London, UK
| | - Jesse Coker
- Action Against Age-Related Macular Degeneration, London, UK
| | - Alastair K Denniston
- Department of Ophthalmology, University Hospitals Birmingham NHSFT, Birmingham, UK
- Moorfields Eye Hospital NHS Foundation Trust and Institute of Ophthalmology, University College London, London, UK
- Health Data Research UK (HDRUK), London, UK
- Institute of Inflammation and Ageing, University of Birmingham, Birmingham, UK
- National Institute for Health and Care Research Birmingham Biomedical Research Centre, Birmingham, UK
| | - Krishnarajah Nirantharakumar
- Institute of Applied Health Research, University of Birmingham, Birmingham, UK
- Health Data Research UK (HDRUK), London, UK
- National Institute for Health and Care Research Birmingham Biomedical Research Centre, Birmingham, UK
| | - Nicola Jaime Adderley
- Institute of Applied Health Research, University of Birmingham, Birmingham, UK
- National Institute for Health and Care Research Birmingham Biomedical Research Centre, Birmingham, UK
| |
Collapse
|
9
|
Chobisa D, Muniyandi A, Sishtla K, Corson TW, Yeo Y. Long-Acting Microparticle Formulation of Griseofulvin for Ocular Neovascularization Therapy. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2024; 20:e2306479. [PMID: 37940612 PMCID: PMC10939919 DOI: 10.1002/smll.202306479] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/30/2023] [Revised: 10/19/2023] [Indexed: 11/10/2023]
Abstract
Neovascular age-related macular degeneration (nAMD) is a leading cause of vision loss in older adults. nAMD is treated with biologics targeting vascular endothelial growth factor; however, many patients do not respond to the current therapy. Here, a small molecule drug, griseofulvin (GRF), is used due to its inhibitory effect on ferrochelatase, an enzyme important for choroidal neovascularization (CNV). For local and sustained delivery to the eyes, GRF is encapsulated in microparticles based on poly(lactide-co-glycolide) (PLGA), a biodegradable polymer with a track record in long-acting formulations. The GRF-loaded PLGA microparticles (GRF MPs) are designed for intravitreal application, considering constraints in size, drug loading content, and drug release kinetics. Magnesium hydroxide is co-encapsulated to enable sustained GRF release over >30 days in phosphate-buffered saline with Tween 80. Incubated in cell culture medium over 30 days, the GRF MPs and the released drug show antiangiogenic effects in retinal endothelial cells. A single intravitreal injection of MPs containing 0.18 µg GRF releases the drug over 6 weeks in vivo to inhibit the progression of laser-induced CNV in mice with no abnormality in the fundus and retina. Intravitreally administered GRF MPs prove effective in preventing CNV, providing proof-of-concept toward a novel, cost-effective nAMD therapy.
Collapse
Affiliation(s)
- Dhawal Chobisa
- Department of Industrial and Molecular Pharmaceutics, Purdue University, 575 West Stadium Avenue, West Lafayette, IN, 47907, USA
- Integrated Product Development Organization, Innovation Plaza Dr. Reddy's Laboratories, Hyderabad, 500050, India
| | - Anbukkarasi Muniyandi
- Departments of Pharmacology & Toxicology and Ophthalmology, Indiana University School of Medicine, 1160 West Michigan Street, Indianapolis, IN, 46202, USA
| | - Kamakshi Sishtla
- Departments of Pharmacology & Toxicology and Ophthalmology, Indiana University School of Medicine, 1160 West Michigan Street, Indianapolis, IN, 46202, USA
| | - Timothy W Corson
- Departments of Pharmacology & Toxicology and Ophthalmology, Indiana University School of Medicine, 1160 West Michigan Street, Indianapolis, IN, 46202, USA
| | - Yoon Yeo
- Department of Industrial and Molecular Pharmaceutics, Purdue University, 575 West Stadium Avenue, West Lafayette, IN, 47907, USA
- Weldon School of Biomedical Engineering, Purdue University, 206 S Martin Jischke Dr., West Lafayette, IN, 47907, USA
| |
Collapse
|
10
|
Yuan M, He Q, Xiang W, Deng Y, Lin S, Zhang R. Natural compounds efficacy in Ophthalmic Diseases: A new twist impacting ferroptosis. Biomed Pharmacother 2024; 172:116230. [PMID: 38350366 DOI: 10.1016/j.biopha.2024.116230] [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: 10/13/2023] [Revised: 01/18/2024] [Accepted: 01/29/2024] [Indexed: 02/15/2024] Open
Abstract
Ferroptosis, a distinct form of cell death, is characterized by the iron-mediated oxidation of lipids and is finely controlled by multiple cellular metabolic pathways. These pathways encompass redox balance, iron regulation, mitochondrial function, as well as amino acid, lipid, and sugar metabolism. Additionally, various disease-related signaling pathways also play a role in the regulation of ferroptosis. In recent years, with the introduction of the concept of ferroptosis and the deepening of research on its mechanism, ferroptosis is closely related to various biological conditions of eye diseases, including eye organ development, aging, immunity, and cancer. This article reviews the development of the concept of ferroptosis, the mechanism of ferroptosis, and its latest research progress in ophthalmic diseases and reviews the research on ferroptosis in ocular diseases within the framework of metabolism, active oxygen biology, and iron biology. Key regulators and mechanisms of ferroptosis in ocular diseases introduce important concepts and major open questions in the field of ferroptosis and related natural compounds. It is hoped that in future research, further breakthroughs will be made in the regulation mechanism of ferroptosis and the use of ferroptosis to promote the treatment of eye diseases. At the same time, natural compounds may be the direction of new drug development for the potential treatment of ferroptosis in the future. Open up a new way for clinical ophthalmologists to research and prevent diseases.
Collapse
Affiliation(s)
- Mengxia Yuan
- Joint Shantou International Eye Center of Shantou University and The Chinese University of Hong Kong, Shantou, China.
| | - Qi He
- People's Hospital of Ningxiang City, Ningxiang, China
| | - Wang Xiang
- The First People's Hospital of Changde City, Changde, China
| | - Ying Deng
- People's Hospital of Ningxiang City, Ningxiang, China
| | - Shibin Lin
- Joint Shantou International Eye Center of Shantou University and The Chinese University of Hong Kong, Shantou, China
| | - Riping Zhang
- Joint Shantou International Eye Center of Shantou University and The Chinese University of Hong Kong, Shantou, China.
| |
Collapse
|
11
|
Kwon C, Cho W, Choi SW, Oh H, Abd El-Aty AM, Gecili I, Jeong JH, Jung TW. DEL-1: a promising treatment for AMD-associated ER stress in retinal pigment epithelial cells. J Transl Med 2024; 22:38. [PMID: 38195611 PMCID: PMC10775473 DOI: 10.1186/s12967-024-04858-9] [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: 06/27/2023] [Accepted: 01/04/2024] [Indexed: 01/11/2024] Open
Abstract
BACKGROUND Age-related macular degeneration (AMD) is an irreversible eye disease that can cause blurred vision. Regular exercise has been suggested as a therapeutic strategy for treating AMD, but how exercise improves AMD is not yet understood. This study investigated the protective effects of developmental endothelial locus-1 (DEL-1), a myokine upregulated during exercise, on endoplasmic reticulum (ER) stress-induced injury in retinal pigment epithelial cells. METHODS We evaluated the levels of AMPK phosphorylation, autophagy markers, and ER stress markers in DEL-1-treated human retinal pigment epithelial cells (hRPE) using Western blotting. We also performed cell viability, caspase 3 activity assays, and autophagosome staining. RESULTS Our findings showed that treatment with recombinant DEL-1 dose-dependently reduced the impairment of cell viability and caspase 3 activity in tunicamycin-treated hRPE cells. DEL-1 treatment also alleviated tunicamycin-induced ER stress markers and VEGF expression. Moreover, AMPK phosphorylation and autophagy markers were increased in hRPE cells in the presence of DEL-1. However, the effects of DEL-1 on ER stress, VEGF expression, and apoptosis in tunicamycin-treated hRPE cells were reduced by AMPK siRNA or 3-methyladenine (3-MA), an autophagy inhibitor. CONCLUSIONS Our study suggests that DEL-1, a myokine, may have potential as a treatment strategy for AMD by attenuating ER stress-induced injury in retinal pigment epithelial cells.
Collapse
Affiliation(s)
| | - Wonjun Cho
- Department of Pharmacology, College of Medicine, Chung-Ang University, 221, Heuksuk-dong, Dongjak-gu, Seoul, 156-756, Republic of Korea
| | - Sung Woo Choi
- Department of Pharmacology, College of Medicine, Chung-Ang University, 221, Heuksuk-dong, Dongjak-gu, Seoul, 156-756, Republic of Korea
| | - Heeseung Oh
- Department of Pharmacology, College of Medicine, Chung-Ang University, 221, Heuksuk-dong, Dongjak-gu, Seoul, 156-756, Republic of Korea
| | - A M Abd El-Aty
- Department of Pharmacology, Faculty of Veterinary Medicine, Cairo University, Giza, 12211, Egypt
- Department of Medical Pharmacology, Medical Faculty, Ataturk University, 25240, Erzurum, Türkiye
| | - Ibrahim Gecili
- Department of Medical Pharmacology, Medical Faculty, Ataturk University, 25240, Erzurum, Türkiye
| | - Ji Hoon Jeong
- Department of Pharmacology, College of Medicine, Chung-Ang University, 221, Heuksuk-dong, Dongjak-gu, Seoul, 156-756, Republic of Korea
- Department of Global Innovative Drugs, Graduate School of Chung-Ang University, Seoul, Republic of Korea
| | - Tae Woo Jung
- Department of Pharmacology, College of Medicine, Chung-Ang University, 221, Heuksuk-dong, Dongjak-gu, Seoul, 156-756, Republic of Korea.
| |
Collapse
|
12
|
Ponnusamy C, Ayarivan P, Selvamuthu P, Natesan S. Age-Related Macular Degeneration - Therapies and Their Delivery. Curr Drug Deliv 2024; 21:683-696. [PMID: 37165500 DOI: 10.2174/1567201820666230510100742] [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: 09/14/2022] [Revised: 12/15/2022] [Accepted: 01/05/2023] [Indexed: 05/12/2023]
Abstract
Age-related macular degeneration (ARMD) is a degenerative ocular disease that is the most important cause of irreversible vision loss in old-aged people in developed countries. Around fifty percent of vision impairments in developed countries are due to ARMD. It is a multifaceted disease that is associated with both genetic and environmental risk factors. The most important treatments option for ARMD includes laser photocoagulation, photodynamic therapy (PDT), Anti-VEGF Injections, and combination therapies. In this review, we also propose that topical ocular drug delivery with nanocarriers has more attention for the treatment of ARMD. The nanocarriers were specially designed for enhanced corneal residential time, prolonged drug release and action, and minimizing the frequency of administrations. Different types of nanocarriers were developed for the topical ocular delivery system, such as nanomicelles, nanoemulsions, nanosuspensions, liposomes, and polymeric nanoparticles. These topical ocular nanocarriers were administered topically, and they can fix the hydrophobic substances, increase solubility and improve the bioavailability of an administered drug. Hence the topical ocular delivery systems with nanocarriers provide a safe and effective therapeutic strategy and promising tool for the treatment of posterior segment ocular diseases ARMD.
Collapse
Affiliation(s)
- Chandrasekar Ponnusamy
- Department of Pharmaceutical Technology, University College of Engineering, Bharathidasan Institute of Technology Campus, Anna University, Tiruchirappalli-620024, Tamil Nadu, India
| | - Puratchikody Ayarivan
- Drug Discovery and Development Research Group, Department of Pharmaceutical Technology, University College of Engineering, Bharathidasan Institute of Technology Campus, Anna University, Tiruchirappalli-620024, Tamil Nadu, India
| | - Preethi Selvamuthu
- Department of Pharmaceutical Technology, University College of Engineering, Bharathidasan Institute of Technology Campus, Anna University, Tiruchirappalli-620024, Tamil Nadu, India
| | - Subramanian Natesan
- Department of Pharmaceutics, National Institute of Pharmaceutical Education and Research (NIPER)-Kolkata, ChunilalBhawan, Kolkata-700054, West Bengal, India
| |
Collapse
|
13
|
Allison C, Jiménez A, Ramajayam K, Haemmerich D, Zderic V. Therapeutic Ultrasound for Enhanced Corneal Permeability to Macromolecules. JOURNAL OF ULTRASOUND IN MEDICINE : OFFICIAL JOURNAL OF THE AMERICAN INSTITUTE OF ULTRASOUND IN MEDICINE 2024; 43:127-136. [PMID: 37842972 DOI: 10.1002/jum.16346] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/06/2023] [Revised: 08/30/2023] [Accepted: 09/17/2023] [Indexed: 10/17/2023]
Abstract
OBJECTIVES Topically applied macromolecules have the potential to provide vision-saving treatments for many of the leading causes of blindness in the United States. The aim of this study was to determine if ultrasound can be applied to increase transcorneal drug delivery of macromolecules without dangerously overheating surrounding ocular tissues. METHODS Dissected corneas of adult rabbits were placed in a diffusion cell between a donor compartment filled with a solution of macromolecules (40, 70 kDa, or 150 kDa) and a receiver compartment. Each cornea was exposed to the drug solution for 60 minutes, with the experimental group receiving 5 minutes of continuous ultrasound or 10 minutes of pulsed ultrasound at a 50% duty cycle (pulse repetition frequency of 500 ms on, 500 ms off) at the beginning of treatment. Unfocused circular ultrasound transducers were operated at 0.5 to 1 W/cm2 intensity and at 600 kHz frequency. RESULTS The greatest increase in transcorneal drug delivery seen was 1.2 times (P < .05) with the application of pulsed ultrasound at 0.5 W/cm2 and 600 kHz for 10 minutes with 40 kDa macromolecules. Histological analysis revealed structural damage mostly in the corneal epithelium, with most damage occurring at the epithelial surface. CONCLUSIONS This study suggests that ultrasound may be used for enhancing transcorneal delivery of macromolecules of lower molecular weights. Further research is needed on the long-term effects of ultrasound parameters used in this study on human ocular tissues.
Collapse
Affiliation(s)
- Claire Allison
- Department of Biomedical Engineering, The George Washington University, Washington, DC, USA
| | - Annette Jiménez
- Department of Biomedical Engineering, The George Washington University, Washington, DC, USA
| | - Krishna Ramajayam
- Department of Pediatrics, Medical University of South Carolina, Charleston, SC, USA
| | - Dieter Haemmerich
- Department of Pediatrics, Medical University of South Carolina, Charleston, SC, USA
| | - Vesna Zderic
- Department of Biomedical Engineering, The George Washington University, Washington, DC, USA
| |
Collapse
|
14
|
Mousavi M, Mousavi A, Jamei B, Sameni H, Zarbakhsh S, Aboutaleb Kadkhodaeian H. Classification, location, and intensity of granules in retinal pigment epithelium following sodium iodate injection in rat animal model. IRANIAN JOURNAL OF BASIC MEDICAL SCIENCES 2024; 27:286-296. [PMID: 38333749 PMCID: PMC10849205 DOI: 10.22038/ijbms.2023.71194.15465] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Figures] [Subscribe] [Scholar Register] [Received: 03/13/2023] [Accepted: 10/23/2023] [Indexed: 02/10/2024]
Abstract
Objectives Age-related macular degeneration (AMD) is one of the eye diseases that can affect a person's central vision. Retinal pigment epithelium (RPE) cells are damaged in this medical condition and some pigments are presented in these cells. Here, we aimed to investigate melanin and lipofuscin granules of RPE cells as a precursor of AMD. Materials and Methods Hooded rats (n=18) were divided into two groups and received 100 μl of sodium iodate (SI) into the retro-orbital sinus of their eyes at 40 and 60 mg/kg doses. The total number of melanin and lipofuscin granules, different types of granules, cytoplasmic dispersion of granules as well as morphological changes in the shape and number of nuclei of RPE cells were evaluated over the course of 1-30 days. Results The total number of melanin pigments increases over time at a dose of 40 mg/kg and decreases at a dose of 60 mg/kg. Also, the total number of lipofuscin granules in 40 mg/kg increases over time and decreases in 60 mg/kg. Autofluorescent intensity (AF) is also increased at 40 mg/kg, but at 60 mg/kg, the highest intensity is on day 7. Also, the highest number of multinucleated giant cells was on day 7 at 60 mg/kg and the most changes in cell appearance due to sodium iodate injection were seen on the first day after injection. Conclusion We demonstrated that granules and autofluorescent intensity appear to decrease at high doses of sodium iodate, which is similar to the advanced stage of the AMD disease, where the number of granules and AF intensity increase in the middle and even early stages of the disease.
Collapse
Affiliation(s)
- Mahboube Mousavi
- Nervous System Stem Cells Research Center, Semnan University of Medical Sciences, Semnan, Iran
- Department of Anatomy, Faculty of Medicine, Semnan University of Medical Sciences, Semnan, Iran
| | - Aliasghar Mousavi
- Visual Health Center, Semnan University of Medical Sciences, Semnan, Iran
| | - Behnam Jamei
- Neurosciences Research Center, Iran University of Medical Sciences, Tehran, Iran
| | - Hamidreza Sameni
- Nervous System Stem Cells Research Center, Semnan University of Medical Sciences, Semnan, Iran
- Department of Anatomy, Faculty of Medicine, Semnan University of Medical Sciences, Semnan, Iran
| | - Sam Zarbakhsh
- Nervous System Stem Cells Research Center, Semnan University of Medical Sciences, Semnan, Iran
- Department of Anatomy, Faculty of Medicine, Semnan University of Medical Sciences, Semnan, Iran
| | - Hamid Aboutaleb Kadkhodaeian
- Nervous System Stem Cells Research Center, Semnan University of Medical Sciences, Semnan, Iran
- Department of Anatomy, Faculty of Medicine, Semnan University of Medical Sciences, Semnan, Iran
- Visual Health Center, Semnan University of Medical Sciences, Semnan, Iran
| |
Collapse
|
15
|
Pan N, Shi J, Du S, Qiu Z, Ran Q, Guo Y, Ma A, Zhang Q, Sang A, Yang X. Honokiol Attenuates Choroidal Neovascularization by Inhibiting the Hypoxia-Inducible Factor-α/Vascular Endothelial Growth Factor Axis via Nuclear Transcription Factor-Kappa B Activation. Curr Eye Res 2024; 49:88-96. [PMID: 37707827 DOI: 10.1080/02713683.2023.2259634] [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: 06/18/2023] [Revised: 08/20/2023] [Accepted: 09/08/2023] [Indexed: 09/15/2023]
Abstract
PURPOSE Honokiol is a lignan isolated from Magnolia officinalis and exhibits anti-angiogenic properties. This study was conducted to investigate the role of honokiol in choroidal neovascularization. METHODS C57BL/6 mice were treated with honokiol at 10-20 mg/kg by daily intraperitoneal injection from day 1 to 6 after laser photocoagulation. ARPE-19 cells were cultured under hypoxic conditions with or without the presence of honokiol. After laser photocoagulation and honokiol treatment, hematoxylin and eosin staining, immunofluorescence and fundus fluorescein angiography were used to analyze the effect of honokiol on choroidal neovascularization formation. Quantitative real-time PCR, western blot, enzyme-linked immunosorbent assay, immunofluorescence, luciferase assay, and chromatin immunoprecipitation were performed to explore the mechanism of honokiol in the pathological process of choroidal neovascularization. Finally, the role of honokiol on the human choroidal vascular endothelial cells was detected by using 5-ethynyl-20-deoxyuridine assay, Transwell and Tube formation assays. RESULTS The results of hematoxylin and eosin staining and immunofluorescence suggested that honokiol reduced the thickness, length, and area of choroidal neovascularization lesions in laser-induced choroidal neovascularization mouse model. Fundus fluorescein angiography showed that choroidal neovascularization leakage was reduced in honokiol group and the concentration of 20 mg/kg showed better effects. Mechanism studies have shown that honokiol exerted inhibitory effects on choroidal neovascularization by inactivating hypoxia-inducible factor-1α/vascular endothelial growth factor axis through the nuclear transcription factor-kappa B signaling pathway. The same results were obtained in ARPE-19 cells under hypoxic conditions. Furthermore, the conditional medium of retinal pigmented epithelial cells promoted the proliferation, migration, and tube formation of human choroidal vascular endothelial cells, while honokiol reversed these. CONCLUSION We demonstrated that honokiol attenuated choroidal neovascularization formation by inactivating the hypoxia-inducible factor-1α/vascular endothelial growth factor axis through nuclear transcription factor-kappa B signaling pathway.
Collapse
Affiliation(s)
- Ningxin Pan
- Department of Ophthalmology, Affiliated Hospital of Nantong University, Nantong, China
| | - Jian Shi
- Department of Ophthalmology, Affiliated Hospital of Nantong University, Nantong, China
| | - Shu Du
- Department of Ophthalmology, Lixiang Eye Hospital of Soochow University, Suzhou, China
| | - Zhaoxian Qiu
- Department of Ophthalmology, Affiliated Hospital of Nantong University, Nantong, China
| | - Qiliang Ran
- Department of Ophthalmology, Affiliated Hospital of Nantong University, Nantong, China
| | - Yangchen Guo
- Department of Ophthalmology, Affiliated Hospital of Nantong University, Nantong, China
| | - Anping Ma
- Department of Ophthalmology, Affiliated Hospital of Nantong University, Nantong, China
| | - Qi Zhang
- Department of Ophthalmology, Affiliated Hospital of Nantong University, Nantong, China
| | - Aimin Sang
- Department of Ophthalmology, Affiliated Hospital of Nantong University, Nantong, China
| | - Xiaowei Yang
- Department of Ophthalmology, Affiliated Hospital of Nantong University, Nantong, China
| |
Collapse
|
16
|
Xiao J, Zhang JY, Luo W, He PC, Skondra D. The Emerging Role of Gut Microbiota in Age-Related Macular Degeneration. THE AMERICAN JOURNAL OF PATHOLOGY 2023; 193:1627-1637. [PMID: 37156326 DOI: 10.1016/j.ajpath.2023.04.006] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/19/2022] [Revised: 03/14/2023] [Accepted: 04/11/2023] [Indexed: 05/10/2023]
Abstract
Age-related macular degeneration (AMD) is a progressive, degenerative retinal disease that is a leading cause of blindness globally. Although multiple risk factors have been identified regarding disease incidence and progression, including smoking, genetics, and diet, the understanding of AMD pathogenesis remains unclear. As such, primary prevention is lacking, and current treatments have limited efficacy. More recently, the gut microbiome has emerged as an influential player in various ocular pathologies. As mediators of metabolism and immune regulation, perturbations in gut microbiota may impart significant effects distally on the neuroretina and its adjacent tissues, termed the gut-retina axis. In this review, key studies over the past several decades are summarized, both in humans and in animal models, which shed insight on the relationships between the gut microbiome and retinal biology and their implications for AMD. The literature linking gut dysbiosis with AMD is examined, along with preclinical animal models and techniques apt for studying the role of gut microbiota in AMD pathogenesis, which include interactions with systemic inflammation, immune regulation, chorioretinal gene expression, and diet. As understanding of the gut-retina axis continues to advance, so too will the possibility for more accessible and effective prevention and therapy of this vision-threatening condition.
Collapse
Affiliation(s)
- Jason Xiao
- Pritzker School of Medicine, University of Chicago, Chicago, Illinois
| | - Jason Y Zhang
- Pritzker School of Medicine, University of Chicago, Chicago, Illinois
| | - Wendy Luo
- Pritzker School of Medicine, University of Chicago, Chicago, Illinois
| | - P Cody He
- Pritzker School of Medicine, University of Chicago, Chicago, Illinois
| | - Dimitra Skondra
- Department of Ophthalmology and Visual Science, University of Chicago, Chicago, Illinois.
| |
Collapse
|
17
|
Khanna S, Shaw L, Hyman MJ, Zhang J, Hariprasad S, Soo J, Flores A, Skondra D. Association of metformin use with risk of newly onset neovascular age-related macular degeneration development. Retina 2023; 44:00006982-990000000-00499. [PMID: 38408173 DOI: 10.1097/iae.0000000000003968] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2022] [Accepted: 10/03/2023] [Indexed: 01/24/2024]
Abstract
PURPOSE To investigate if metformin use reduces the odds of developing new neovascular AMD (nAMD). METHODS This is a case-control study of 86,930 subjects with new diagnoses of nAMD and 86,918 matched controls using the Merative™ Marketscan® Research Databases. Subjects were analyzed using multivariable conditional logistic regression to identify the risks of various exposures on developing nAMD. A subgroup analysis of 22,117 diabetic cases and 21,616 diabetic controls was also performed. RESULTS Metformin use was associated with reduced odds ratio (OR) of developing nAMD (OR 0.95, 95% confidence interval 0.91-0.98) in full sample and diabetic cohort particularly in patients without any diabetic retinopathy (DR) -an effect that persisted after Bonferroni correction. In the diabetic cohort without DR, reduced OR was observed at 24-month cumulative doses of 1 to 300g, 301 to 630g, and 631 to 1080g. CONCLUSIONS Metformin use was associated with reduced OR of nAMD, particularly in patients without DR. The protective effect was noted for 24-month cumulative doses below 1080g. Metformin may be a novel preventive strategy for nAMD.
Collapse
Affiliation(s)
- Saira Khanna
- Department of Ophthalmology & Visual Science, University of Chicago Pritzker, School of Medicine, Chicago, IL, United States
- The Retina Institute, St. Louis, MO
| | - Lincoln Shaw
- Department of Ophthalmology & Visual Science, University of Chicago Pritzker, School of Medicine, Chicago, IL, United States
| | - Max J Hyman
- University of Chicago Division of the Biological Sciences, Chicago, IL, United States
| | - Jason Zhang
- Department of Ophthalmology & Visual Science, University of Chicago Pritzker, School of Medicine, Chicago, IL, United States
| | - Seenu Hariprasad
- Department of Ophthalmology & Visual Science, University of Chicago Pritzker, School of Medicine, Chicago, IL, United States
| | - Jackie Soo
- University of Chicago Division of the Biological Sciences, Chicago, IL, United States
| | - Andrea Flores
- University of Chicago Division of the Biological Sciences, Chicago, IL, United States
| | - Dimitra Skondra
- Department of Ophthalmology & Visual Science, University of Chicago Pritzker, School of Medicine, Chicago, IL, United States
| |
Collapse
|
18
|
Hollitt GL, Qassim A, Thomson D, Schmidt JM, Nguyen TT, Landers J, MacGregor S, Siggs OM, Souzeau E, Craig JE. Genetic Risk Assessment of Degenerative Eye Disease (GRADE): study protocol of a prospective assessment of polygenic risk scores to predict diagnosis of glaucoma and age-related macular degeneration. BMC Ophthalmol 2023; 23:431. [PMID: 37875865 PMCID: PMC10594830 DOI: 10.1186/s12886-023-03143-5] [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: 04/19/2023] [Accepted: 09/14/2023] [Indexed: 10/26/2023] Open
Abstract
BACKGROUND Glaucoma and age-related macular degeneration (AMD) account for a substantial portion of global blindness. Both conditions are highly heritable, with recognised monogenic and polygenic inheritance patterns. Current screening guidelines lack decisive recommendations. Polygenic risk scores (PRS) allow for cost-effective broad population risk stratification for these conditions. The predictive potential of PRS could facilitate earlier diagnosis and treatment, and prevent unnecessary vision loss. METHODS The Genetic Risk Assessment of Degenerative Eye disease (GRADE) study is a prospective study designed to generate high-quality evidence about the feasibility of PRS to stratify individuals from the general population, enabling identification of those at highest risk of developing glaucoma or AMD. The targeted recruitment is 1000 individuals aged over 50 years, from which blood or saliva samples will be used for genotyping and an individual PRS for glaucoma and AMD will be derived. Individuals with PRS values in the bottom decile (n = 100), top decile (n = 100) and middle 80% (n = 100) for both glaucoma and AMD will undergo a detailed eye examination for glaucoma and/or AMD. DISCUSSION The primary objective will be to compare the prevalence of glaucoma and AMD cases between low, intermediate, and high PRS risk groups. We expect to find a higher prevalence of both diseases in the high PRS risk group, as compared to the middle and low risk groups. This prospective study will assess the clinical validity of a PRS for glaucoma and AMD in the general Australian population. Positive findings will support the implementation of PRS into clinical practice.
Collapse
Affiliation(s)
- Georgina L Hollitt
- Department of Ophthalmology, Flinders University, 1 Flinders Drive, 5042, Bedford Park, SA, Australia.
| | - Ayub Qassim
- Department of Ophthalmology, Flinders University, 1 Flinders Drive, 5042, Bedford Park, SA, Australia
| | - Daniel Thomson
- Department of Ophthalmology, Flinders University, 1 Flinders Drive, 5042, Bedford Park, SA, Australia
| | - Joshua M Schmidt
- Department of Ophthalmology, Flinders University, 1 Flinders Drive, 5042, Bedford Park, SA, Australia
| | - Thi Thi Nguyen
- Department of Ophthalmology, Flinders University, 1 Flinders Drive, 5042, Bedford Park, SA, Australia
| | - John Landers
- Department of Ophthalmology, Flinders University, 1 Flinders Drive, 5042, Bedford Park, SA, Australia
| | - Stuart MacGregor
- QIMR Berghofer Medical Research Institute, 4006, Herston, QLD, Australia
| | - Owen M Siggs
- Department of Ophthalmology, Flinders University, 1 Flinders Drive, 5042, Bedford Park, SA, Australia
- Garvan Institute of Medical Research, 2010, Darlinghurst, NSW, Australia
| | - Emmanuelle Souzeau
- Department of Ophthalmology, Flinders University, 1 Flinders Drive, 5042, Bedford Park, SA, Australia
| | - Jamie E Craig
- Department of Ophthalmology, Flinders University, 1 Flinders Drive, 5042, Bedford Park, SA, Australia
| |
Collapse
|
19
|
Sasseville S, Karami S, Tchatchouang A, Charpentier P, Anney P, Gobert D, Proulx S. Biomaterials used for tissue engineering of barrier-forming cell monolayers in the eye. Front Bioeng Biotechnol 2023; 11:1269385. [PMID: 37840667 PMCID: PMC10569698 DOI: 10.3389/fbioe.2023.1269385] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2023] [Accepted: 09/15/2023] [Indexed: 10/17/2023] Open
Abstract
Cell monolayers that form a barrier between two structures play an important role for the maintenance of tissue functionality. In the anterior portion of the eye, the corneal endothelium forms a barrier that controls fluid exchange between the aqueous humor of the anterior chamber and the corneal stroma. This monolayer is central in the pathogenesis of Fuchs endothelial corneal dystrophy (FECD). FECD is a common corneal disease, in which corneal endothelial cells deposit extracellular matrix that increases the thickness of its basal membrane (Descemet's membrane), and forms excrescences (guttae). With time, there is a decrease in endothelial cell density that generates vision loss. Transplantation of a monolayer of healthy corneal endothelial cells on a Descemet membrane substitute could become an interesting alternative for the treatment of this pathology. In the back of the eye, the retinal pigment epithelium (RPE) forms the blood-retinal barrier, controlling fluid exchange between the choriocapillaris and the photoreceptors of the outer retina. In the retinal disease dry age-related macular degeneration (dry AMD), deposits (drusen) form between the RPE and its basal membrane (Bruch's membrane). These deposits hinder fluid exchange, resulting in progressive RPE cell death, which in turn generates photoreceptor cell death, and vision loss. Transplantation of a RPE monolayer on a Bruch's membrane/choroidal stromal substitute to replace the RPE before photoreceptor cell death could become a treatment alternative for this eye disease. This review will present the different biomaterials that are proposed for the engineering of a monolayer of corneal endothelium for the treatment of FECD, and a RPE monolayer for the treatment of dry AMD.
Collapse
Affiliation(s)
- Samantha Sasseville
- Axe Médecine Régénératrice, Hôpital du Saint-Sacrement, Centre de Recherche en Organogénèse Expérimentale de l’Université Laval/LOEX; Centre de Recherche du Centre Hospitalier Universitaire (CHU) de Québec-Université Laval, Québec, QC, Canada
- Département d’ophtalmologie et d’oto-rhino-laryngologie-chirurgie cervico-faciale, Faculté de Médecine, Université Laval, Québec, QC, Canada
| | - Samira Karami
- Axe Médecine Régénératrice, Hôpital du Saint-Sacrement, Centre de Recherche en Organogénèse Expérimentale de l’Université Laval/LOEX; Centre de Recherche du Centre Hospitalier Universitaire (CHU) de Québec-Université Laval, Québec, QC, Canada
- Département d’ophtalmologie et d’oto-rhino-laryngologie-chirurgie cervico-faciale, Faculté de Médecine, Université Laval, Québec, QC, Canada
| | - Ange Tchatchouang
- Axe Médecine Régénératrice, Hôpital du Saint-Sacrement, Centre de Recherche en Organogénèse Expérimentale de l’Université Laval/LOEX; Centre de Recherche du Centre Hospitalier Universitaire (CHU) de Québec-Université Laval, Québec, QC, Canada
- Département d’ophtalmologie et d’oto-rhino-laryngologie-chirurgie cervico-faciale, Faculté de Médecine, Université Laval, Québec, QC, Canada
| | - Pascale Charpentier
- Axe Médecine Régénératrice, Hôpital du Saint-Sacrement, Centre de Recherche en Organogénèse Expérimentale de l’Université Laval/LOEX; Centre de Recherche du Centre Hospitalier Universitaire (CHU) de Québec-Université Laval, Québec, QC, Canada
- Département d’ophtalmologie et d’oto-rhino-laryngologie-chirurgie cervico-faciale, Faculté de Médecine, Université Laval, Québec, QC, Canada
| | - Princia Anney
- Axe Médecine Régénératrice, Hôpital du Saint-Sacrement, Centre de Recherche en Organogénèse Expérimentale de l’Université Laval/LOEX; Centre de Recherche du Centre Hospitalier Universitaire (CHU) de Québec-Université Laval, Québec, QC, Canada
- Département d’ophtalmologie et d’oto-rhino-laryngologie-chirurgie cervico-faciale, Faculté de Médecine, Université Laval, Québec, QC, Canada
| | - Delphine Gobert
- Département d’ophtalmologie et d’oto-rhino-laryngologie-chirurgie cervico-faciale, Faculté de Médecine, Université Laval, Québec, QC, Canada
- Centre universitaire d’ophtalmologie (CUO), Hôpital du Saint-Sacrement, CHU de Québec-Université Laval, Québec, QC, Canada
| | - Stéphanie Proulx
- Axe Médecine Régénératrice, Hôpital du Saint-Sacrement, Centre de Recherche en Organogénèse Expérimentale de l’Université Laval/LOEX; Centre de Recherche du Centre Hospitalier Universitaire (CHU) de Québec-Université Laval, Québec, QC, Canada
- Département d’ophtalmologie et d’oto-rhino-laryngologie-chirurgie cervico-faciale, Faculté de Médecine, Université Laval, Québec, QC, Canada
| |
Collapse
|
20
|
Iqball S, Beck DK, Devarajan G, Khoo CP, O’Connor DM, Ellis S, Guzman E, Mitrophanous KA, Lad Y. Lentiviral delivered aflibercept OXB-203 for treatment of neovascular AMD. Mol Ther Methods Clin Dev 2023; 30:350-366. [PMID: 37637380 PMCID: PMC10448334 DOI: 10.1016/j.omtm.2023.07.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2022] [Accepted: 07/12/2023] [Indexed: 08/29/2023]
Abstract
Neovascular age-related macular degeneration (nAMD) is a leading cause of blindness in the aging population, with vascular endothelial growth factor (VEGF) playing a key role. Treatment with recombinant anti-VEGFs is the current standard of care; however, it is only effective for 1-2 months at a time and requires re-administration. Gene therapy could pave the way for stable, long-term expression of therapeutic anti-VEGF with a single dose, reducing the frequency of treatment and potentially improving clinical outcomes. As such, we have developed OXB-203, a lentiviral-based gene therapy encoding the anti-VEGF protein aflibercept. Aflibercept derived from OXB-203 exhibited comparable in vitro binding characteristics to VEGF as recombinant aflibercept. Furthermore, its biological potency was demonstrated by the equivalent inhibition of VEGF-induced human umbilical vein endothelial cell (HUVEC) proliferation and tubule formation as recombinant aflibercept. In a rat choroidal neovascularization (CNV) model of nAMD, a single subretinal administration of OXB-203 reduced laser-induced CNV lesion areas analogous to an intravitreal bolus of recombinant aflibercept. Finally, in a head-to-head comparative study, aflibercept derived from OXB-203 was shown to be expressed at significantly higher levels in ocular tissues than from an AAV8-aflibercept vector following a single subretinal delivery to rats. These findings support the therapeutic potential of OXB-203 for the management of nAMD.
Collapse
Affiliation(s)
- Sharifah Iqball
- Oxford Biomedica (UK) Ltd., Windrush Court, Transport Way, OX4 6LT Oxford, UK
| | - Daniel K. Beck
- Oxford Biomedica (UK) Ltd., Windrush Court, Transport Way, OX4 6LT Oxford, UK
| | - Gayathri Devarajan
- Oxford Biomedica (UK) Ltd., Windrush Court, Transport Way, OX4 6LT Oxford, UK
| | - Cheen P. Khoo
- Oxford Biomedica (UK) Ltd., Windrush Court, Transport Way, OX4 6LT Oxford, UK
| | - Deirdre M. O’Connor
- Oxford Biomedica (UK) Ltd., Windrush Court, Transport Way, OX4 6LT Oxford, UK
| | - Scott Ellis
- Oxford Biomedica (UK) Ltd., Windrush Court, Transport Way, OX4 6LT Oxford, UK
| | - Efrain Guzman
- Oxford Biomedica (UK) Ltd., Windrush Court, Transport Way, OX4 6LT Oxford, UK
| | | | - Yatish Lad
- Oxford Biomedica (UK) Ltd., Windrush Court, Transport Way, OX4 6LT Oxford, UK
| |
Collapse
|
21
|
Huang K, Liu X, Lv Z, Zhang D, Zhou Y, Lin Z, Guo J. MMP9-Responsive Graphene Oxide Quantum Dot-Based Nano-in-Micro Drug Delivery System for Combinatorial Therapy of Choroidal Neovascularization. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2023; 19:e2207335. [PMID: 36871144 DOI: 10.1002/smll.202207335] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/24/2022] [Revised: 01/29/2023] [Indexed: 06/18/2023]
Abstract
Age-related macular degeneration (AMD), especially wet AMD with choroidal neovascularization (CNV), commonly causes blindness in older patients and disruption of the choroid followed by second-wave injuries, including chronic inflammation, oxidative stress, and excessive matrix metalloproteinase 9 (MMP9) expression. Increased macrophage infiltrate in parallel with microglial activation and MMP9 overexpression on CNV lesions is shown to contribute to the inflammatory process and then enhance pathological ocular angiogenesis. Graphene oxide quantum dots (GOQDs), as natural antioxidants, exert anti-inflammatory effects and minocycline is a specific macrophage/microglial inhibitor that can suppress both macrophage/microglial activation and MMP9 activity. Herein, an MMP9-responsive GOQD-based minocycline-loaded nano-in-micro drug delivery system (C18PGM) is developed by chemically bonding GOQDs to an octadecyl-modified peptide sequence (C18-GVFHQTVS, C18P) that can be specifically cleaved by MMP9. Using a laser-induced CNV mouse model, the prepared C18PGM shows significant MMP9 inhibitory activity and anti-inflammatory action followed by antiangiogenic effects. Moreover, C18PGM combined with antivascular endothelial growth factor antibody bevacizumab markedly increases the antiangiogenesis effect by interfering with the "inflammation-MMP9-angiogenesis" cascade. The prepared C18PGM shows a good safety profile and no obvious ophthalmic or systemic side effects. The results taken together suggest that C18PGM is an effective and novel strategy for combinatorial therapy of CNV.
Collapse
Affiliation(s)
- Keke Huang
- Institute of Advanced Materials for Nano-Bio Applications, School of Ophthalmology and Optometry, Eye Hospital, Wenzhou Medical University, Wenzhou, Zhejiang, 325027, P. R. China
| | - Xin Liu
- Institute of Advanced Materials for Nano-Bio Applications, School of Ophthalmology and Optometry, Eye Hospital, Wenzhou Medical University, Wenzhou, Zhejiang, 325027, P. R. China
| | - Ziru Lv
- Institute of Advanced Materials for Nano-Bio Applications, School of Ophthalmology and Optometry, Eye Hospital, Wenzhou Medical University, Wenzhou, Zhejiang, 325027, P. R. China
| | - Di Zhang
- Institute of Advanced Materials for Nano-Bio Applications, School of Ophthalmology and Optometry, Eye Hospital, Wenzhou Medical University, Wenzhou, Zhejiang, 325027, P. R. China
| | - Yuling Zhou
- Department of ophthalmology, Huangshi Central Hospital, Affiliated Hospital of Hubei Polytechnic University, Huangshi, Hubei, 435000, P. R. China
| | - Zhiqing Lin
- Institute of Advanced Materials for Nano-Bio Applications, School of Ophthalmology and Optometry, Eye Hospital, Wenzhou Medical University, Wenzhou, Zhejiang, 325027, P. R. China
| | - Juan Guo
- Department of Ophthalmology, The Third People's Hospital of Chengdu, The Affiliated Hospital of Southwest Jiaotong University, Chengdu, Sichuan, 610031, P. R. China
| |
Collapse
|
22
|
Zhang X, Du S, Yang D, Jin X, Zhang Y, Wang D, Wang H, Zhang Y, Zhu M. LncRNA MALAT1 knockdown inhibits the development of choroidal neovascularization. Heliyon 2023; 9:e19503. [PMID: 37810031 PMCID: PMC10558713 DOI: 10.1016/j.heliyon.2023.e19503] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2023] [Revised: 08/20/2023] [Accepted: 08/24/2023] [Indexed: 10/10/2023] Open
Abstract
In the pathogenesis of age-related macular degeneration, long non-coding RNAs have become important regulators. This study aimed to investigate the role of metastasis-associated lung adenocarcinoma transcript 1 (MALAT1) in the progression of choroidal neovascularization (CNV) and the underlying mechanisms. The in vivo and in vitro model of CNV was established using laser-induced mouse CNV model and human choroidal vascular endothelial cells (HCVECs) exposed to hypoxia respectively. We explore the role of MALAT1 in the pathogenesis of CNV by using the small interference RNA both in vivo and in vitro. MALAT1 expression was found to be upregulated in the retinal pigment epithelial-choroidal complexes. MALAT1 knockdown inhibited CNV development and leakage in vivo and decreased HCVECs proliferation, migration, and tube formation in vitro. MALAT1 performed the task as a miR-17-5p sponge to regulate the expression of vascular endothelial growth factor A (VEGFA) and E26 transformation specific-1 (ETS1). This study provides a new perspective on the pathogenesis of CNV and suggests that the axis MALAT/miR-17-5p/VEGFA or ETS1 may be an effective therapeutic target for CNV.
Collapse
Affiliation(s)
- Xiaoli Zhang
- Changchun Aier Eye Hospital, Aier Eye Hospital Group, Changchun, Nanguang District, Jilin Province, China
| | - Shu Du
- Department of Ophthalmology, Lixiang Eye Hospital of Soochow University, Suzhou, Jiangsu, China
| | - Defeng Yang
- Department of Ophthalmology, The Second Hospital of Jilin University, Changchun, Jilin, China
| | - Xuemei Jin
- Department of Ophthalmology, Lixiang Eye Hospital of Soochow University, Suzhou, Jiangsu, China
| | - Yuan Zhang
- Changchun Aier Eye Hospital, Aier Eye Hospital Group, Changchun, Nanguang District, Jilin Province, China
| | - Diya Wang
- Changchun Aier Eye Hospital, Aier Eye Hospital Group, Changchun, Nanguang District, Jilin Province, China
| | - Huixia Wang
- Department of Ophthalmology, Lixiang Eye Hospital of Soochow University, Suzhou, Jiangsu, China
| | - Yan Zhang
- Changchun Aier Eye Hospital, Aier Eye Hospital Group, Changchun, Nanguang District, Jilin Province, China
| | - Manhui Zhu
- Department of Ophthalmology, Lixiang Eye Hospital of Soochow University, Suzhou, Jiangsu, China
| |
Collapse
|
23
|
Wu J, Jiang Y, Sun J, Sun X. Identification and Validation of an Aging-Associated circRNA-miRNA-mRNA Network in Neovascular Age-Related Macular Degeneration. Gerontology 2023; 69:1218-1231. [PMID: 37604141 PMCID: PMC10614246 DOI: 10.1159/000531287] [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: 10/08/2022] [Accepted: 05/22/2023] [Indexed: 08/23/2023] Open
Abstract
INTRODUCTION Neovascular age-related macular degeneration (NVAMD) is a leading cause of severe vision impairment in the elderly. Aging is one of the most pivotal underlying molecular mechanisms of NVAMD. METHODS In this study, we identified the potential aging-related genes involved in NVAMD. Considering that noncoding RNAs are vital regulators of NVAMD progression, we further explored and constructed an aging-originated circRNA-miRNA-mRNA network of NVAMD. Differential expression of 23 aging-associated genes was identified based on sequencing data and the Human Aging Genomic Resources tool at a threshold of p < 0.05, and log2|fold change| > 1. RESULTS We screened 12 microRNAs (miRNAs) using public datasets and miRNet database. A total of 13 circRNAs were subsequently mined using the starBase tool. Merging these 13 circRNAs, 12 miRNAs, and 15 genes together, we obtained 281 pairs of circRNA-miRNA and 30 pairs of miRNA-mRNA. CONCLUSION We created an aging-related circRNA-miRNA-mRNA network, which could be a promising target for future AMD treatments.
Collapse
Affiliation(s)
- Jiali Wu
- School of Medicine, Department of Ophthalmology, Shanghai General Hospital, Shanghai Jiao Tong University, Shanghai, China,
- National Clinical Research Center for Ophthalmic Diseases, Shanghai, China,
| | - Yuxin Jiang
- School of Medicine, Department of Ophthalmology, Shanghai General Hospital, Shanghai Jiao Tong University, Shanghai, China
- National Clinical Research Center for Ophthalmic Diseases, Shanghai, China
| | - Junran Sun
- School of Medicine, Department of Ophthalmology, Shanghai General Hospital, Shanghai Jiao Tong University, Shanghai, China
- National Clinical Research Center for Ophthalmic Diseases, Shanghai, China
- Shanghai Key Laboratory of Fundus Diseases, Shanghai, China
- Shanghai Engineering Center for Visual Science and Photomedicine, Shanghai, China
| | - Xiaodong Sun
- School of Medicine, Department of Ophthalmology, Shanghai General Hospital, Shanghai Jiao Tong University, Shanghai, China
- National Clinical Research Center for Ophthalmic Diseases, Shanghai, China
- Shanghai Key Laboratory of Fundus Diseases, Shanghai, China
- Shanghai Engineering Center for Visual Science and Photomedicine, Shanghai, China
| |
Collapse
|
24
|
Wei J, Mu J, Tang Y, Qin D, Duan J, Wu A. Next-generation nanomaterials: advancing ocular anti-inflammatory drug therapy. J Nanobiotechnology 2023; 21:282. [PMID: 37598148 PMCID: PMC10440041 DOI: 10.1186/s12951-023-01974-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2023] [Accepted: 06/29/2023] [Indexed: 08/21/2023] Open
Abstract
Ophthalmic inflammatory diseases, including conjunctivitis, keratitis, uveitis, scleritis, and related conditions, pose considerable challenges to effective management and treatment. This review article investigates the potential of advanced nanomaterials in revolutionizing ocular anti-inflammatory drug interventions. By conducting an exhaustive analysis of recent advancements and assessing the potential benefits and limitations, this review aims to identify promising avenues for future research and clinical applications. The review commences with a detailed exploration of various nanomaterial categories, such as liposomes, dendrimers, nanoparticles (NPs), and hydrogels, emphasizing their unique properties and capabilities for accurate drug delivery. Subsequently, we explore the etiology and pathophysiology of ophthalmic inflammatory disorders, highlighting the urgent necessity for innovative therapeutic strategies and examining recent preclinical and clinical investigations employing nanomaterial-based drug delivery systems. We discuss the advantages of these cutting-edge systems, such as biocompatibility, bioavailability, controlled release, and targeted delivery, alongside potential challenges, which encompass immunogenicity, toxicity, and regulatory hurdles. Furthermore, we emphasize the significance of interdisciplinary collaborations among material scientists, pharmacologists, and clinicians in expediting the translation of these breakthroughs from laboratory environments to clinical practice. In summary, this review accentuates the remarkable potential of advanced nanomaterials in redefining ocular anti-inflammatory drug therapy. We fervently support continued research and development in this rapidly evolving field to overcome existing barriers and improve patient outcomes for ophthalmic inflammatory disorders.
Collapse
Affiliation(s)
- Jing Wei
- School of Ophthalmology, Chengdu University of Traditional Chinese Medicine, Chengdu, 610075, China
| | - Jinyu Mu
- School of Ophthalmology, Chengdu University of Traditional Chinese Medicine, Chengdu, 610075, China
| | - Yong Tang
- Sichuan Key Medical Laboratory of New Drug Discovery and Druggability Evaluation, Education Ministry Key Laboratory of Medical Electrophysiology, School of Pharmacy, Southwest Medical University, Luzhou, 646000, China
| | - Dalian Qin
- Sichuan Key Medical Laboratory of New Drug Discovery and Druggability Evaluation, Education Ministry Key Laboratory of Medical Electrophysiology, School of Pharmacy, Southwest Medical University, Luzhou, 646000, China
| | - Junguo Duan
- School of Ophthalmology, Chengdu University of Traditional Chinese Medicine, Chengdu, 610075, China.
| | - Anguo Wu
- Sichuan Key Medical Laboratory of New Drug Discovery and Druggability Evaluation, Education Ministry Key Laboratory of Medical Electrophysiology, School of Pharmacy, Southwest Medical University, Luzhou, 646000, China.
| |
Collapse
|
25
|
Nam U, Lee S, Jeon JS. Generation of a 3D Outer Blood-Retinal Barrier with Advanced Choriocapillaris and Its Application in Diabetic Retinopathy in a Microphysiological System. ACS Biomater Sci Eng 2023; 9:4929-4939. [PMID: 37494673 DOI: 10.1021/acsbiomaterials.3c00326] [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] [Indexed: 07/28/2023]
Abstract
The outer blood-retinal barrier (oBRB) provides an optimal environment for the function of the photoreceptor by regulating the exchange of molecules between subretinal space and the choriocapillaris, and its dysfunction could impair the photoreceptor's function and vision. The existing in vitro models have limitations in reproducing the barrier function or physiological characteristics of oBRB and choriocapillaris. Here, we engineered a microphysiological system-based oBRB-choriocapillaris model that simultaneously incorporates the desired physiological characteristics and is simple to fabricate. First, we generated microvascular networks to mimic choriocapillaris and investigated the role of fibroblasts in vasculogenesis. By adding retinal pigment epithelial cells to one side of blood vessels formed with endothelial cells and fibroblasts and optimizing their culture medium conditions, we established an oBRB-choriocapillaris model. To verify the physiological similarity of our oBRB-choriocapillaris model, we identified the polarization and expression of the tight junction of the retinal pigment epithelium, Bruch's membrane, and the fenestral diaphragm of choriocapillaris. Finally, we tried to recapitulate the diabetes mellitus environment in our model with hyperglycemia and diabetes-related cytokines. This induced a decrease in tight junction integrity, loss of barrier function, and shrinkage of blood vessels, similar to the in vivo pathological changes observed in the oBRB and choriocapillaris. The oBRB-choriocapillaris model developed using a microphysiological system is expected to offer a valuable in vitro platform for retinal and choroidal vascular diseases in preclinical applications.
Collapse
Affiliation(s)
- Ungsig Nam
- Department of Mechanical Engineering, Korea Advanced Institute of Science and Technology, Daejeon 34141, Republic of Korea
| | - Seokhun Lee
- Department of Mechanical Engineering, Korea Advanced Institute of Science and Technology, Daejeon 34141, Republic of Korea
| | - Jessie S Jeon
- Department of Mechanical Engineering, Korea Advanced Institute of Science and Technology, Daejeon 34141, Republic of Korea
- KAIST Institute for Health Science and Technology, Korea Advanced Institute of Science and Technology, Daejeon 34141, Republic of Korea
| |
Collapse
|
26
|
Chakraborty D, Thakkar M, Venkatesh R, Roy S, Bhavsar M, Karcher H. Short-Term Treatment Outcomes of Brolucizumab in Patients with Neovascular Age-Related Macular Degeneration: A Multicentre Indian Real-World Evidence Study. Clin Ophthalmol 2023; 17:2295-2307. [PMID: 37583576 PMCID: PMC10424695 DOI: 10.2147/opth.s415044] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2023] [Accepted: 07/25/2023] [Indexed: 08/17/2023] Open
Abstract
Objective To evaluate the short-term effectiveness and safety outcomes following brolucizumab treatment in patients with neovascular age-related macular degeneration (nAMD) as a part of real-world clinical practice in India. Methods This was a retrospective, observational, multicentre study including patients (≥50 years old) diagnosed with nAMD. Anonymized data of the patients receiving the first dose of brolucizumab intravitreal injection (IVI) who were either treatment-naïve or previously treated with a single or a combination of other anti-VEGF IVIs were included. The present study reported the change in retinal fluid levels from baseline to month 3, best-corrected visual acuity (BCVA), central retinal thickness (CRT), and the number of injections received. The adverse events in the three months after brolucizumab treatment initiation were also monitored. Results The study included 63 patients (65 eyes) from four study centres across India (mean age: 69.1 ± 9.7 years). A total of 82 brolucizumab injections were administered during the 3 months of study duration, with 52/65 (80.0%) eyes receiving only 1 injection. Resolution of IRF, SRF, and PED was observed in 76.9%, 64.6%, and 67.7% of eyes, respectively. Further, a significant reduction in CRT was observed (baseline: 403.5 ± 118.7 μm; month 3: 308.3 ± 73.8 μm; p < 0.001), and BCVA also improved notably from 0.7 ± 0.5 logMAR at baseline to 0.5 ± 0.4 logMAR at month 3 (p < 0.001). Adverse events (AEs) were reported in 3 eyes from 3 patients; retinal pigment epithelial rip (1) and subretinal hemorrhage (2) after the first injection of brolucizumab, however, none discontinued the treatment. Conclusion The study reports on the short-term effectiveness and tolerability of brolucizumab therapy in the management of nAMD in both treatment-naïve and switch eyes. Brolucizumab was observed to have a favourable benefit-risk profile, and study results were within the known safety profile, with no instances of intraocular inflammation.
Collapse
Affiliation(s)
| | - Milan Thakkar
- Dr. Milan’s Retina Care Centre, Rajkot, Gujarat, India
| | | | - Sangeeta Roy
- Susrut Eye Foundation and Research Centre, Kolkata, West Bengal, India
| | - Maulik Bhavsar
- Novartis Healthcare Pvt. Ltd., Mumbai, Maharashtra, India
| | | |
Collapse
|
27
|
El-Den NN, Naglah A, Elsharkawy M, Ghazal M, Alghamdi NS, Sandhu H, Mahdi H, El-Baz A. Scale-adaptive model for detection and grading of age-related macular degeneration from color retinal fundus images. Sci Rep 2023; 13:9590. [PMID: 37311794 PMCID: PMC10264426 DOI: 10.1038/s41598-023-35197-2] [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: 09/28/2022] [Accepted: 05/14/2023] [Indexed: 06/15/2023] Open
Abstract
Age-related Macular Degeneration (AMD), a retinal disease that affects the macula, can be caused by aging abnormalities in number of different cells and tissues in the retina, retinal pigment epithelium, and choroid, leading to vision loss. An advanced form of AMD, called exudative or wet AMD, is characterized by the ingrowth of abnormal blood vessels beneath or into the macula itself. The diagnosis is confirmed by either fundus auto-fluorescence imaging or optical coherence tomography (OCT) supplemented by fluorescein angiography or OCT angiography without dye. Fluorescein angiography, the gold standard diagnostic procedure for AMD, involves invasive injections of fluorescent dye to highlight retinal vasculature. Meanwhile, patients can be exposed to life-threatening allergic reactions and other risks. This study proposes a scale-adaptive auto-encoder-based model integrated with a deep learning model that can detect AMD early by automatically analyzing the texture patterns in color fundus imaging and correlating them to the vasculature activity in the retina. Moreover, the proposed model can automatically distinguish between AMD grades assisting in early diagnosis and thus allowing for earlier treatment of the patient's condition, slowing the disease and minimizing its severity. Our model features two main blocks, the first is an auto-encoder-based network for scale adaption, and the second is a convolutional neural network (CNN) classification network. Based on a conducted set of experiments, the proposed model achieves higher diagnostic accuracy compared to other models with accuracy, sensitivity, and specificity that reach 96.2%, 96.2%, and 99%, respectively.
Collapse
Affiliation(s)
- Niveen Nasr El-Den
- Department of Computer and System Engineering, Faculty of Engineering, Ain Shams University, Cairo, Egypt
| | - Ahmed Naglah
- Department of Bioengineering, University of Louisville, Louisville, KY, USA
| | - Mohamed Elsharkawy
- Department of Bioengineering, University of Louisville, Louisville, KY, USA
| | - Mohammed Ghazal
- Electrical, Computer and Biomedical Engineering Department, College of Engineering, Abu Dhabi University, Abu Dhabi, United Arab Emirates
| | - Norah Saleh Alghamdi
- Department of Computer Sciences, College of Computer and Information Sciences, Princess Nourah Bint Abdulrahman University, Riyadh, Saudi Arabia
| | - Harpal Sandhu
- Department of Bioengineering, University of Louisville, Louisville, KY, USA
| | - Hani Mahdi
- Department of Computer and System Engineering, Faculty of Engineering, Ain Shams University, Cairo, Egypt
| | - Ayman El-Baz
- Department of Bioengineering, University of Louisville, Louisville, KY, USA.
| |
Collapse
|
28
|
Barone F, Amaral J, Bunea I, Farnoodian M, Gupta R, Gupta R, Baker D, Phillips MJ, Blanch RJ, Maminishkis A, Gamm DM, Bharti K. A versatile laser-induced porcine model of outer retinal and choroidal degeneration for preclinical testing. JCI Insight 2023; 8:157654. [PMID: 37288665 PMCID: PMC10393234 DOI: 10.1172/jci.insight.157654] [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: 12/28/2022] [Accepted: 05/03/2023] [Indexed: 06/09/2023] Open
Abstract
Over 30 million people worldwide suffer from untreatable vision loss and blindness associated with childhood-onset and age-related eye diseases caused by photoreceptor (PR), retinal pigment epithelium (RPE), and choriocapillaris (CC) degeneration. Recent work suggests that RPE-based cell therapy may slow down vision loss in late stages of age-related macular degeneration (AMD), a polygenic disease induced by RPE atrophy. However, accelerated development of effective cell therapies is hampered by the lack of large-animal models that allow testing safety and efficacy of clinical doses covering the human macula (20 mm2). We developed a versatile pig model to mimic different types and stages of retinal degeneration. Using an adjustable power micropulse laser, we generated varying degrees of RPE, PR, and CC damage and confirmed the damage by longitudinal analysis of clinically relevant outcomes, including analyses by adaptive optics and optical coherence tomography/angiography, along with automated image analysis. By imparting a tunable yet targeted damage to the porcine CC and visual streak - with a structure similar to the human macula - this model is optimal for testing cell and gene therapies for outer retinal diseases including AMD, retinitis pigmentosa, Stargardt, and choroideremia. The amenability of this model to clinically relevant imaging outcomes will facilitate faster translation to patients.
Collapse
Affiliation(s)
| | - Juan Amaral
- National Eye Institute (NEI), NIH, Bethesda, Maryland, USA
| | - Irina Bunea
- National Eye Institute (NEI), NIH, Bethesda, Maryland, USA
| | | | - Rohan Gupta
- National Eye Institute (NEI), NIH, Bethesda, Maryland, USA
| | - Rishabh Gupta
- National Eye Institute (NEI), NIH, Bethesda, Maryland, USA
| | - Dara Baker
- National Eye Institute (NEI), NIH, Bethesda, Maryland, USA
| | - M Joseph Phillips
- McPherson Eye Research Institute and Waisman Center, and
- Department of Ophthalmology and Visual Sciences, University of Wisconsin, Madison, Wisconsin, USA
| | - Richard J Blanch
- Academic Department of Military Surgery and Trauma, Royal Centre for Defense Medicine, Birmingham, United Kingdom
- Neuroscience and Ophthalmology, Institute of Inflammation and Ageing, University of Birmingham, Birmingham, United Kingdom
- University Hospitals Birmingham NHS Foundation Trust, Birmingham, United Kingdom
| | | | - David M Gamm
- McPherson Eye Research Institute and Waisman Center, and
- Department of Ophthalmology and Visual Sciences, University of Wisconsin, Madison, Wisconsin, USA
| | - Kapil Bharti
- National Eye Institute (NEI), NIH, Bethesda, Maryland, USA
| |
Collapse
|
29
|
Ioakeimidis N, Gourgouli I, Terentes-Printzios D, Gourgouli DM, Georgakopoulos C, Aznaouridis K, Spai S, Tousoulis D, Tsioufis K, Vlachopoulos C. Aortic stiffness and systemic inflammation changes predict clinical response to intravitreal anti-vascular endothelial growth factor therapy in patients with age-related macular degeneration. J Hum Hypertens 2023; 37:273-278. [PMID: 35474138 DOI: 10.1038/s41371-022-00689-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2021] [Revised: 08/06/2021] [Accepted: 03/30/2022] [Indexed: 11/09/2022]
Abstract
Aortic stiffness and systemic inflammation are predictors of cardiovascular risk. Anti-vascular endothelial growth factor agents (anti-VEGF), injected intravitreally, can reverse the course of exudate age-related macular degeneration (AMD). We sought to investigate the association of changes in aortic stiffness and systemic inflammation with response to anti-VEGF therapy. 54 patients (mean age: 76 ± 10 years) with AMD received two consecutive monthly intravitreal injections of ranibizumab (0.5 mg). The primary outcome measure was change in carotid-femoral pulse wave velocity (PWV) from baseline to 1 month after the second injection. Secondary endpoint was the change in serum high sensitivity interleukin-6 (hsIL-6) levels. Ranibizumab caused a decrease of PWV after the first (by 0.36 ± 1.4 m/s) and the second injection (by 0.31 ± 1.4 m/s) and remained decreased 1 month after the second injection (overall P < 0.05). PWV decreased significantly in good responders (according to clinical criteria and fundus findings, P = 0.004), whereas it increased numerically in poor responders (P = 0.21) over the study period. In responders, hsIL-6 decreased after the first injection and remained decreased 1 month after the second injection (by 0.63 ± 0.35 pg/ml, overall P = 0.02). PWV (P = 0.005) and hsIL-6 (P = 0.042) were independent predictors of improvement after adjusting for age and presence of hypertension and diabetes. The decrease in PWV through the whole study period was positively correlated with the reduction in hsIL-6 (r = 0.36, P < 0.01). Intravitreal ranibizumab injections lead to a decrease in PWV and hsIL-6. Both parameters predict clinical improvement and may aid to improving treatment targeting and hence therapeutic outcome in patients with AMD.
Collapse
Affiliation(s)
- Nikolaos Ioakeimidis
- Hypertension and Cardiometabolic Syndrome Unit 1st Cardiology Department, Athens Medical School, Hippokration Hospital, Athens, Greece
| | - Ioanna Gourgouli
- Ophthalmology Department, General Hospital of Athens "Sismanoglio-Amalia Fleming", Athens, Greece
| | - Dimitrios Terentes-Printzios
- Hypertension and Cardiometabolic Syndrome Unit 1st Cardiology Department, Athens Medical School, Hippokration Hospital, Athens, Greece
| | | | - Christos Georgakopoulos
- Hypertension and Cardiometabolic Syndrome Unit 1st Cardiology Department, Athens Medical School, Hippokration Hospital, Athens, Greece
| | - Konstantinos Aznaouridis
- Hypertension and Cardiometabolic Syndrome Unit 1st Cardiology Department, Athens Medical School, Hippokration Hospital, Athens, Greece
| | - Sofia Spai
- Ophthalmology Department, General Hospital of Athens "Sismanoglio-Amalia Fleming", Athens, Greece
| | - Dimitris Tousoulis
- Hypertension and Cardiometabolic Syndrome Unit 1st Cardiology Department, Athens Medical School, Hippokration Hospital, Athens, Greece
| | - Konstantinos Tsioufis
- Hypertension and Cardiometabolic Syndrome Unit 1st Cardiology Department, Athens Medical School, Hippokration Hospital, Athens, Greece
| | - Charalambos Vlachopoulos
- Hypertension and Cardiometabolic Syndrome Unit 1st Cardiology Department, Athens Medical School, Hippokration Hospital, Athens, Greece.
| |
Collapse
|
30
|
Yuan Y, Kong W, Liu XM, Shi GH. Gene Therapy Activates Retinal Pigment Epithelium Cell Proliferation for Age-related Macular Degeneration in a Mouse Model. Curr Med Sci 2023; 43:384-392. [PMID: 36944806 DOI: 10.1007/s11596-022-2684-3] [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: 02/10/2022] [Accepted: 06/21/2022] [Indexed: 03/23/2023]
Abstract
OBJECTIVE Age-related macular degeneration (AMD) is a degenerative retinal disease. The degeneration or death of retinal pigment epithelium (RPE) cells is implicated in the pathogenesis of AMD. This study aimed to activate the proliferation of RPE cells in vivo by using an adeno-associated virus (AAV) vector encoding β-catenin to treat AMD in a mouse model. METHODS Mice were intravitreally injected with AAV2/8-Y733F-VMD2-β-catenin for 2 or 4 weeks, and β-catenin expression was measured using immunofluorescence staining, real-time quantitative reverse transcription polymerase chain reaction (PCR), and Western blotting. The function of β-catenin was determined using retinal flat mounts and laser-induced damage models. Finally, the safety of AAV2/8-Y733F-VMD2-β-catenin was evaluated by multiple intravitreal injections. RESULTS AAV2/8-Y733F-VMD2-β-catenin induced the expression of β-catenin in RPE cells. It activated the proliferation of RPE cells and increased cyclin D1 expression. It was beneficial to the recovery of laser-induced damage by activating the proliferation of RPE cells. Furthermore, it could induce apoptosis of RPE cells by increasing the expression of Trp53, Bax and caspase3 while decreasing the expression of Bcl-2. CONCLUSION AAV2/8-Y733F-VMD2-β-catenin increased β-catenin expression in RPE cells, activated RPE cell proliferation, and helped mice heal from laser-induced eye injury. Furthermore, it could induce the apoptosis of RPE cells. Therefore, it may be a safe approach for AMD treatment.
Collapse
Affiliation(s)
- Yun Yuan
- School of Biomedical Engineering (Suzhou), Division of Life Sciences and Medicine, University of Science and Technology of China, Suzhou, 215000, China.
- Suzhou Institute of Biomedical Engineering and Technology, Chinese Academy of Science, Suzhou, 215000, China.
| | - Wen Kong
- School of Biomedical Engineering (Suzhou), Division of Life Sciences and Medicine, University of Science and Technology of China, Suzhou, 215000, China
- Suzhou Institute of Biomedical Engineering and Technology, Chinese Academy of Science, Suzhou, 215000, China
| | - Xiao-Mei Liu
- School of Biomedical Engineering (Suzhou), Division of Life Sciences and Medicine, University of Science and Technology of China, Suzhou, 215000, China
- Suzhou Institute of Biomedical Engineering and Technology, Chinese Academy of Science, Suzhou, 215000, China
| | - Guo-Hua Shi
- School of Biomedical Engineering (Suzhou), Division of Life Sciences and Medicine, University of Science and Technology of China, Suzhou, 215000, China
- Suzhou Institute of Biomedical Engineering and Technology, Chinese Academy of Science, Suzhou, 215000, China
| |
Collapse
|
31
|
Han Y, Yang KH, He DX, Yu CF, Tao L, Liao CY, Cai BX, Liu ZG, Qiu Y, Wu YL. Effect of palmitoylethanolamide on degeneration of a human-derived retinal pigment epithelial cell induced by all-trans retinal. Int J Ophthalmol 2023; 16:191-200. [PMID: 36816211 PMCID: PMC9922624 DOI: 10.18240/ijo.2023.02.04] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2022] [Accepted: 12/07/2022] [Indexed: 02/05/2023] Open
Abstract
AIM To study the effect of palmitoylethanolamide (PEA) on apoptosis of retinal pigment epithelial (RPE) cells induced by all-trans retinal (atRAL) and to explore the possible molecular mechanism. METHODS CellTiter 96® Aqueous One Solution Cell Proliferation Assay (MTS) was used to detect the effect of PEA on human-derived retinal epithelial cells (ARPE-19) viability induced by atRAL. A Leica DMi8 inverted microscope was used to observe cell morphology. Reactive oxygen species (ROS) production was evaluated with 2',7'-dichlorodihydrof-luorescein diacetate (H2DCFDA) staining and fluorescence microscopy. Expression of c-Jun N-terminal kinase (JNK), phosphorylated JNK (p-JNK), c-Jun, phosphorylated c-Jun (p-c-Jun), Bak, cleaved caspase-3, C/EBP homologous protein (CHOP), and binding (Bip) protein levels were tested by Western blot. Abca4 -/- Rdh8 -/- mice, mouse models of atRAL clearance defects which displays some symbolic characteristics of dry age-related macular degeneration (AMD) and Stargardt disease (STGD1). In the animal models, PEA was injected intraperitoneally. The full-field electroretinogram was used to detect visual function under scotopic conditions traced from mice. Optical coherence tomography showed reconstitution or thickening of the retinal pigment epithelium layer. Effect of PEA on fundus injury induced by light in Abca4-/-Rdh8-/- mice was observed by fundus photography. RESULTS PEA ameliorated ARPE-19 cells apoptosis and inhibited ROS (including mitochondrial ROS) production induced by atRAL. PEA improved the retinal functional, prohibited both RPE and photoreceptor from death, ameliorates light-induced fundus impairment in Abca4 -/- Rdh8 -/- mice. In vitro and in vivo, PEA inhibited JNK, p-JNK, c-Jun, p-c-Jun, Bak, cleaved caspase-3, CHOP, and Bip protein levels induced by all-trans retinal in ARPE-19 cells. CONCLUSION PEA has effect on treating RPE cells apoptosis in retinopathy caused by atRAL accumulation. PEA is a potential treatment strategy for dry AMD and STGD1. The molecular mechanism is affecting the ROS-JNK-CHOP signaling pathway partly.
Collapse
Affiliation(s)
- Yun Han
- Eye Institute of Xiamen University, Fujian Provincial Key Laboratory of Ophthalmology and Visual Science, Engineering and Research Center of Eye Regenerative Medicine, School of Medicine, Xiamen University, Xiamen 361102, Fujian Province, China,Department of Ophthalmology, Xiang'an Hospital of Xiamen University, Xiamen 361102, Fujian Province, China,Xiamen University Affiliated Xiamen Eye Center, Xiamen 361102, Fujian Province, China
| | - Kun-Huan Yang
- Eye Institute of Xiamen University, Fujian Provincial Key Laboratory of Ophthalmology and Visual Science, Engineering and Research Center of Eye Regenerative Medicine, School of Medicine, Xiamen University, Xiamen 361102, Fujian Province, China
| | - Dan-Xue He
- Eye Institute of Xiamen University, Fujian Provincial Key Laboratory of Ophthalmology and Visual Science, Engineering and Research Center of Eye Regenerative Medicine, School of Medicine, Xiamen University, Xiamen 361102, Fujian Province, China
| | - Chao-Feng Yu
- Eye Institute of Xiamen University, Fujian Provincial Key Laboratory of Ophthalmology and Visual Science, Engineering and Research Center of Eye Regenerative Medicine, School of Medicine, Xiamen University, Xiamen 361102, Fujian Province, China
| | - Lei Tao
- Eye Institute of Xiamen University, Fujian Provincial Key Laboratory of Ophthalmology and Visual Science, Engineering and Research Center of Eye Regenerative Medicine, School of Medicine, Xiamen University, Xiamen 361102, Fujian Province, China
| | - Chun-Yan Liao
- Eye Institute of Xiamen University, Fujian Provincial Key Laboratory of Ophthalmology and Visual Science, Engineering and Research Center of Eye Regenerative Medicine, School of Medicine, Xiamen University, Xiamen 361102, Fujian Province, China
| | - Bin-Xiang Cai
- Eye Institute of Xiamen University, Fujian Provincial Key Laboratory of Ophthalmology and Visual Science, Engineering and Research Center of Eye Regenerative Medicine, School of Medicine, Xiamen University, Xiamen 361102, Fujian Province, China
| | - Zu-Guo Liu
- Eye Institute of Xiamen University, Fujian Provincial Key Laboratory of Ophthalmology and Visual Science, Engineering and Research Center of Eye Regenerative Medicine, School of Medicine, Xiamen University, Xiamen 361102, Fujian Province, China,Department of Ophthalmology, Xiang'an Hospital of Xiamen University, Xiamen 361102, Fujian Province, China,Xiamen University Affiliated Xiamen Eye Center, Xiamen 361102, Fujian Province, China
| | - Yan Qiu
- Eye Institute of Xiamen University, Fujian Provincial Key Laboratory of Ophthalmology and Visual Science, Engineering and Research Center of Eye Regenerative Medicine, School of Medicine, Xiamen University, Xiamen 361102, Fujian Province, China,Department of Ophthalmology, Xiang'an Hospital of Xiamen University, Xiamen 361102, Fujian Province, China,Xiamen University Affiliated Xiamen Eye Center, Xiamen 361102, Fujian Province, China
| | - Ya-Lin Wu
- Eye Institute of Xiamen University, Fujian Provincial Key Laboratory of Ophthalmology and Visual Science, Engineering and Research Center of Eye Regenerative Medicine, School of Medicine, Xiamen University, Xiamen 361102, Fujian Province, China,Department of Ophthalmology, Xiang'an Hospital of Xiamen University, Xiamen 361102, Fujian Province, China,Xiamen University Affiliated Xiamen Eye Center, Xiamen 361102, Fujian Province, China,Shenzhen Research Institute of Xiamen University, Shenzhen 518000, Guangdong Province, China
| | | | | | | | | | | | - Eye Institute of Xiamen University, Fujian Provincial Key Laboratory of Ophthalmology and Visual Science, Engineering and Research Center of Eye Regenerative Medicine, School of Medicine, Xiamen University, Xiamen 361102, Fujian Province, China; Department of Ophthalmology, Xiang’an Hospital of Xiamen University, Xiamen 361102, Fujian Province, China; Xiamen University Affiliated Xiamen Eye Center, Xiamen 361102, Fujian Province, China
| | - Eye Institute of Xiamen University, Fujian Provincial Key Laboratory of Ophthalmology and Visual Science, Engineering and Research Center of Eye Regenerative Medicine, School of Medicine, Xiamen University, Xiamen 361102, Fujian Province, China; Department of Ophthalmology, Xiang’an Hospital of Xiamen University, Xiamen 361102, Fujian Province, China; Xiamen University Affiliated Xiamen Eye Center, Xiamen 361102, Fujian Province, China
| | - Eye Institute of Xiamen University, Fujian Provincial Key Laboratory of Ophthalmology and Visual Science, Engineering and Research Center of Eye Regenerative Medicine, School of Medicine, Xiamen University, Xiamen 361102, Fujian Province, China; Department of Ophthalmology, Xiang’an Hospital of Xiamen University, Xiamen 361102, Fujian Province, China; Xiamen University Affiliated Xiamen Eye Center, Xiamen 361102, Fujian Province, China
| |
Collapse
|
32
|
Liu Y, Gu S, Su Y, Wang S, Cheng Y, Sang X, Jin L, Liu Y, Li C, Liu W, Chen M, Wang X, Wang Z. Embryonic stem cell extracellular vesicles reverse the senescence of retinal pigment epithelial cells by the p38MAPK pathway. Exp Eye Res 2023; 227:109365. [PMID: 36577484 DOI: 10.1016/j.exer.2022.109365] [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: 06/22/2022] [Revised: 12/21/2022] [Accepted: 12/23/2022] [Indexed: 12/26/2022]
Abstract
Retinal pigment epithelial (RPE) cellular senescence is regarded as an initiator for age-related macular degeneration (AMD). We previously demonstrated that by the coculture way, embryonic stem cells (ESCs) can reverse the senescence of RPE cells, but xenograft cells can cause a plethora of adverse effects. Extracellular vesicles (EVs) derived from ESCs can act as messengers to mediate nearby cell activities and have the same potential as ESCs to reverse RPE senescence. Furthermore, ESC-EVs have achieved preliminary efficacy while treating many age-related diseases. The present study aimed to test the effect of ESC-EVs on the replicative senescence model of RPE cells as well as its mechanism. The results showed that ESC-EVs enhanced the proliferative ability and cell cycle transition of senescent RPE cells, whereas reduced the senescence-associated galactosidase (SA-β-gal) staining rate, as well as the levels of mitochondrial membrane potential (MMP) and reactive oxygen species (ROS). Moreover, classical markers of cellular senescence p21WAF1/CIP1 (p21) and p16INK4a (p16) were downregulated. The bioinformatic analysis and further study showed that the inhibition of the p38MAPK pathway by ESC-EVs played a pivotal role in RPE cellular senescence-reversing effect, which was ameliorated or even abolished when dehydrocorydaline were administrated simultaneously, demonstrating that ESC-EVs can effectively reverse RPE cellular senesence by inhibiting the p38MAPK pathway, thus highlights the potential of ESC-derived EVs as biomaterials for preventative and protective therapy in AMD.
Collapse
Affiliation(s)
- Yurun Liu
- State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University, Guangdong Provincial Key Laboratory of Ophthalmology and Visual Science, Guangzhou, 510060, China.
| | - Simin Gu
- State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University, Guangdong Provincial Key Laboratory of Ophthalmology and Visual Science, Guangzhou, 510060, China.
| | - Yaru Su
- State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University, Guangdong Provincial Key Laboratory of Ophthalmology and Visual Science, Guangzhou, 510060, China.
| | - Shoubi Wang
- The First Affiliated Hospital of Xiamen, 55 Zhenhai Road, Xiamen, China.
| | - Yaqi Cheng
- State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University, Guangdong Provincial Key Laboratory of Ophthalmology and Visual Science, Guangzhou, 510060, China.
| | - Xuan Sang
- State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University, Guangdong Provincial Key Laboratory of Ophthalmology and Visual Science, Guangzhou, 510060, China.
| | - Lin Jin
- The First Affiliated Hospital of Shandong First Medical University, 16766 Jingshi Road, Jinan, Shandong Province, China.
| | - Ying Liu
- State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University, Guangdong Provincial Key Laboratory of Ophthalmology and Visual Science, Guangzhou, 510060, China.
| | - Chaoyang Li
- State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University, Guangdong Provincial Key Laboratory of Ophthalmology and Visual Science, Guangzhou, 510060, China.
| | - Weiqin Liu
- State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University, Guangdong Provincial Key Laboratory of Ophthalmology and Visual Science, Guangzhou, 510060, China.
| | - Minghao Chen
- State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University, Guangdong Provincial Key Laboratory of Ophthalmology and Visual Science, Guangzhou, 510060, China.
| | - Xiaoran Wang
- State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University, Guangdong Provincial Key Laboratory of Ophthalmology and Visual Science, Guangzhou, 510060, China.
| | - Zhichong Wang
- State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University, Guangdong Provincial Key Laboratory of Ophthalmology and Visual Science, Guangzhou, 510060, China.
| |
Collapse
|
33
|
O'Leary F, Campbell M. The blood-retina barrier in health and disease. FEBS J 2023; 290:878-891. [PMID: 34923749 DOI: 10.1111/febs.16330] [Citation(s) in RCA: 63] [Impact Index Per Article: 63.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2021] [Revised: 12/05/2021] [Accepted: 12/17/2021] [Indexed: 12/20/2022]
Abstract
The blood-retina barrier (BRB) is the term used to define the properties of the retinal capillaries and the retinal pigment epithelium (RPE), which separate the systemic circulation from the retina. More specifically, the inner blood-retina barrier (iBRB) is used to describe the properties of the endothelial cells that line the microvasculature of the inner retina, while the outer blood-retina barrier (oBRB) refers to the properties of the RPE cells that separate the fenestrated choriocapillaris from the retina. The BRB is not a fixed structure; rather, it is dynamic, with its components making unique contributions to its function and structural integrity, and therefore the retina. For example, while tight junction (TJ) proteins between retinal endothelial cells are the key molecular structures in the maintenance of the iBRB, other cell types surrounding endothelial cells are also important. In fact, this overall structure is termed the neurovascular unit (NVU). The integrity of the BRB is crucial in the maintenance of a 'dry', tightly regulated retinal microenvironment through the regulation of transcellular and paracellular transport. Specifically, breakdown of TJs can result in oedema formation, a hallmark feature of many retinal diseases. Here, we will describe the oBRB briefly, with a more in-depth focus on the structure and function of the iBRB in health and diseased states. Finally, the contribution of the BRB to the pathophysiology of age-related macular degeneration (AMD), diabetic retinopathy (DR) and other rarer retinal diseases will be discussed.
Collapse
Affiliation(s)
- Fionn O'Leary
- Smurfit Institute of Genetics, Trinity College Dublin, Dublin 2, Ireland
| | - Matthew Campbell
- Smurfit Institute of Genetics, Trinity College Dublin, Dublin 2, Ireland
| |
Collapse
|
34
|
Nguyen DD, Luo LJ, Yang CJ, Lai JY. Highly Retina-Permeating and Long-Acting Resveratrol/Metformin Nanotherapeutics for Enhanced Treatment of Macular Degeneration. ACS NANO 2023; 17:168-183. [PMID: 36524981 DOI: 10.1021/acsnano.2c05824] [Citation(s) in RCA: 63] [Impact Index Per Article: 63.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/17/2023]
Abstract
The development of therapeutics for effective treatments of retinal diseases is significantly constrained by various biological barriers. We herein report a nanomedicine strategy to develop nanotherapeutics featured with not only high retinal permeability but also sustained bioactive delivery. Specifically, the nanotherapeutics are rationally designed via aminolysis of resveratrol-encapsulated polycaprolactone nanoparticles (R@PCL NPs), followed by the formation of amide linkages with carboxyl-terminated transacting activator of transcription cell penetrating peptide (T) and metformin (M). The R@PCL-T/M NP nanotherapeutics are demonstrated in vitro to possess persistent drug release profiles, good ocular biocompatibility, and potent bioactive activities for targeting prevailing risk factors associated with retinal diseases. In vivo studies indicate that single-dose intravitreal administration of the R@PCL-T/M NPs can effectively improve retinal permeability (∼15-fold increase), prevent loss of endogenous antioxidants, and suppress the growth of abnormal vessels in the retina with macular degeneration for 56 days. This high treatment efficacy can be ascribed to the enhanced retinal permeability of the nanotherapeutics in conjunction with the sustained pharmacological activity of the dual drugs (R and M) in the retinal pigment epithelial region. These findings show a great promise for the development of pharmacological nanoformulations capable of targeting the retina and thereby treating complex posterior segment diseases with improved efficacies.
Collapse
Affiliation(s)
- Duc Dung Nguyen
- Department of Biomedical Engineering, Chang Gung University, Taoyuan 33302, Taiwan
| | - Li-Jyuan Luo
- Department of Biomedical Engineering, Chang Gung University, Taoyuan 33302, Taiwan
| | - Chia-Jung Yang
- Department of Biomedical Engineering, Chang Gung University, Taoyuan 33302, Taiwan
| | - Jui-Yang Lai
- Department of Biomedical Engineering, Chang Gung University, Taoyuan 33302, Taiwan
- Department of Ophthalmology, Chang Gung Memorial Hospital, Linkou, Taoyuan 33305, Taiwan
- Department of Materials Engineering, Ming Chi University of Technology, New Taipei City 24301, Taiwan
- Research Center for Chinese Herbal Medicine, College of Human Ecology, Chang Gung University of Science and Technology, Taoyuan 33303, Taiwan
| |
Collapse
|
35
|
Wu Q, Chen Z, Wu C, Zhang L, Wu Y, Liu X, Wang Y, Zhang Z. MD2 Inhibits Choroidal Neovascularization via Antagonizing TLR4/MD2 Mediated Signaling Pathway. Curr Eye Res 2023; 48:474-484. [PMID: 36591949 DOI: 10.1080/02713683.2022.2164780] [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: 01/03/2023]
Abstract
PURPOSE To explore the pathological mechanism of Toll-like receptor 4 (TLR4) mediating neovascular age-related macular degeneration (nAMD) and the potential role of the TLR4 coreceptor myeloid differentiation protein 2 (MD2). METHODS In the study, we inhibited MD2 with the chalcone derivative L2H17 and we utilized a laser-induced choroidal neovascularization (CNV) mouse model and Tert-butyl hydroperoxide (TBHP)-challenged rhesus choroid-retinal endothelial (RF/6A) cells to assess the effect of MD2 blockade on CNV. RESULTS Inhibiting MD2 with L2H17 reduced angiogenesis in CNV mice, and significantly protected against retinal dysfunction. In retina and choroid/retinal pigment epithelium (RPE) tissues, L2H17 reduced phospho-ERK, phospho-P65 but not phospho-P38, phospho-JNK, and reduced the transcriptional levels of IL-6, TNF-α, ICAM-1 but not VCAM-1. L2H17 could protect RF/6A against TBHP-induced inflammation, oxidative stress, and apoptosis, via inhibiting the TLR4/MD2 signaling pathway and the following downstream mitogen-activated protein kinase (MAPK) and nuclear transcription factor-κB (NF-κB) activation. CONCLUSIONS Inhibiting MD2 with L2H17 significantly reduced CNV, suppressed inflammation, and oxidative stress by antagonizing TLR4/MD2 pathway in an MD2-dependent manner. MD2 may be a potential therapeutic target and L2H17 may offer an alternative treatment strategy for nAMD.
Collapse
Affiliation(s)
- Qi Wu
- School of Optometry and Ophthalmology and Eye Hospital, Wenzhou Medical University, Wenzhou, China.,State Key Laboratory Cultivation Base and Key Laboratory of Vision Science, Ministry of Health P. R. China and Zhejiang Provincial Key Laboratory of Ophthalmology and Optometry, Wenzhou, China
| | - Zhang Chen
- The Second Affiliated Hospital, Yuying Children's Hospital of Wenzhou Medical University, Wenzhou, China
| | - Chenxin Wu
- School of Optometry and Ophthalmology and Eye Hospital, Wenzhou Medical University, Wenzhou, China.,State Key Laboratory Cultivation Base and Key Laboratory of Vision Science, Ministry of Health P. R. China and Zhejiang Provincial Key Laboratory of Ophthalmology and Optometry, Wenzhou, China
| | - Lingxi Zhang
- Chemical Biology Research Center, School of Pharmaceutical Sciences, Wenzhou Medical University, Wenzhou, China
| | - Yuyang Wu
- School of Optometry and Ophthalmology and Eye Hospital, Wenzhou Medical University, Wenzhou, China.,State Key Laboratory Cultivation Base and Key Laboratory of Vision Science, Ministry of Health P. R. China and Zhejiang Provincial Key Laboratory of Ophthalmology and Optometry, Wenzhou, China
| | - Xiyuan Liu
- School of Optometry and Ophthalmology and Eye Hospital, Wenzhou Medical University, Wenzhou, China.,State Key Laboratory Cultivation Base and Key Laboratory of Vision Science, Ministry of Health P. R. China and Zhejiang Provincial Key Laboratory of Ophthalmology and Optometry, Wenzhou, China
| | - Yi Wang
- Chemical Biology Research Center, School of Pharmaceutical Sciences, Wenzhou Medical University, Wenzhou, China
| | - Zongduan Zhang
- School of Optometry and Ophthalmology and Eye Hospital, Wenzhou Medical University, Wenzhou, China.,State Key Laboratory Cultivation Base and Key Laboratory of Vision Science, Ministry of Health P. R. China and Zhejiang Provincial Key Laboratory of Ophthalmology and Optometry, Wenzhou, China
| |
Collapse
|
36
|
Ferroptosis: mechanisms and advances in ocular diseases. Mol Cell Biochem 2023:10.1007/s11010-022-04644-5. [PMID: 36617346 DOI: 10.1007/s11010-022-04644-5] [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: 03/23/2022] [Accepted: 12/14/2022] [Indexed: 01/09/2023]
Abstract
As an essential trace element in the body, iron is critical for the maintenance of organismal metabolism. Excessive iron facilitates reactive oxygen species generation and inflicts damage on cells and tissues. Ferroptosis, a newly identified iron-dependent type of programmed cell death, has been implicated in a broad set of metabolic disorders. Ferroptosis is mainly characterized by excess iron accumulation, elevated lipid peroxides and reactive oxygen species, and reduced levels of glutathione and glutathione peroxidase 4. The vast emerging literature on ferroptosis has shown that numerous diseases, such as cancers, neurodegeneration, and autoimmune diseases, are associated with ferroptosis. Meanwhile, recent studies have confirmed the relationship between ferroptosis and eye diseases including keratopathy, cataract, glaucoma, retinal ischemia-reperfusion injury, age-related macular degeneration, retinitis pigmentosa, diabetic retinopathy, and retinoblastoma, indicating the critical role of ferroptosis in ocular diseases. In this article, we introduce the primary signaling pathways of ferroptosis and review current advances in research on ocular diseases involving iron overload and ferroptosis. Furthermore, several unanswered questions in the area are raised. Addressing these unanswered questions promises to provide new insights into preventing, controlling, and treating not only ocular diseases but also a variety of other diseases in the near future.
Collapse
|
37
|
P Goebel C, Song YS, S Zaitoun I, Wang S, A D Potter H, M Sorenson C, Sheibani N. Adenosine Receptors Expression in Human Retina and Choroid with Age-related Macular Degeneration. J Ophthalmic Vis Res 2023; 18:51-59. [PMID: 36937188 PMCID: PMC10020792 DOI: 10.18502/jovr.v18i1.12725] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2022] [Accepted: 09/08/2022] [Indexed: 02/24/2023] Open
Abstract
Purpose Adenosine signaling modulates ocular inflammatory processes, and its antagonism mitigates neovascularization in both newborns and preclinical models of ocular neovascularization including age-related macular degeneration (AMD). The adenosine receptor expression patterns have not been well characterized in the human retina and choroid. Methods Here we examined the expression of adenosine receptor subtypes within the retina and choroid of human donor eyes with and without AMD. Antibodies specifically targeting adenosine receptor subtypes A1, A2A, A2B, and A3 were used to assess their expression patterns. Quantitative real-time PCR analysis was used to confirm gene expression of these receptors within the normal human retina and choroid. Results We found that all four receptor subtypes were expressed in several layers of the retina, and within the retinal pigment epithelium and choroid. The expression of A1 receptors was more prominent in the inner and outer plexiform layers, where microglia normally reside, and supported by RNA expression in the retina. A2A and A2B showed similar expression patterns with prominent expression in the vasculature and retinal pigment epithelium. No dramatic differences in expression of these receptors were observed in eyes from patients with dry or wet AMD compared to control, with the exception A3 receptors. Eyes with dry AMD lost expression of A3 in the photoreceptor outer segments compared with eyes from control or wet AMD. Conclusion The ocular presence of adenosine receptors is consistent with their proposed role in modulation of inflammation in both the retina and choroid, and their potential targeting for AMD treatment.
Collapse
Affiliation(s)
- Collin P Goebel
- Department of Ophthalmology and Visual Sciences, University of Wisconsin School of Medicine and Public Health, Madison, WI, USA
| | - Yong-Seok Song
- Department of Ophthalmology and Visual Sciences, University of Wisconsin School of Medicine and Public Health, Madison, WI, USA
- McPherson Eye Research Institute, University of Wisconsin School of Medicine and Public Health, Madison, WI, USA
| | - Ismail S Zaitoun
- Department of Ophthalmology and Visual Sciences, University of Wisconsin School of Medicine and Public Health, Madison, WI, USA
- McPherson Eye Research Institute, University of Wisconsin School of Medicine and Public Health, Madison, WI, USA
| | - Shoujian Wang
- Department of Ophthalmology and Visual Sciences, University of Wisconsin School of Medicine and Public Health, Madison, WI, USA
| | - Heather A D Potter
- Department of Ophthalmology and Visual Sciences, University of Wisconsin School of Medicine and Public Health, Madison, WI, USA
| | - Christine M Sorenson
- Department of Ophthalmology and Visual Sciences, University of Wisconsin School of Medicine and Public Health, Madison, WI, USA
- McPherson Eye Research Institute, University of Wisconsin School of Medicine and Public Health, Madison, WI, USA
| | - Nader Sheibani
- Department of Ophthalmology and Visual Sciences, University of Wisconsin School of Medicine and Public Health, Madison, WI, USA
- McPherson Eye Research Institute, University of Wisconsin School of Medicine and Public Health, Madison, WI, USA
- Department of Cell and Regenerative Biology, University of Wisconsin School of Medicine and Public Health, Madison, WI, USA
- Department of Biomedical Engineering, University of Wisconsin, Madison, WI, USA
| |
Collapse
|
38
|
Dos Santos FM, Ciordia S, Mesquita J, de Sousa JPC, Paradela A, Tomaz CT, Passarinha LAP. Vitreous humor proteome: unraveling the molecular mechanisms underlying proliferative and neovascular vitreoretinal diseases. Cell Mol Life Sci 2022; 80:22. [PMID: 36585968 PMCID: PMC11072707 DOI: 10.1007/s00018-022-04670-y] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2022] [Revised: 11/09/2022] [Accepted: 12/12/2022] [Indexed: 01/01/2023]
Abstract
Proliferative diabetic retinopathy (PDR), proliferative vitreoretinopathy (PVR), and neovascular age-related macular degeneration (nAMD) are among the leading causes of blindness. Due to the multifactorial nature of these vitreoretinal diseases, omics approaches are essential for a deeper understanding of the pathophysiologic processes underlying the evolution to a proliferative or neovascular etiology, in which patients suffer from an abrupt loss of vision. For many years, it was thought that the function of the vitreous was merely structural, supporting and protecting the surrounding ocular tissues. Proteomics studies proved that vitreous is more complex and biologically active than initially thought, and its changes reflect the physiological and pathological state of the eye. The vitreous is the scenario of a complex interplay between inflammation, fibrosis, oxidative stress, neurodegeneration, and extracellular matrix remodeling. Vitreous proteome not only reflects the pathological events that occur in the retina, but the changes in the vitreous itself play a central role in the onset and progression of vitreoretinal diseases. Therefore, this review offers an overview of the studies on the vitreous proteome that could help to elucidate some of the pathological mechanisms underlying proliferative and/or neovascular vitreoretinal diseases and to find new potential pharmaceutical targets.
Collapse
Affiliation(s)
- Fátima Milhano Dos Santos
- Health Sciences Research Centre (CICS-UBI), Universidade da Beira Interior, 6201-001, Covilhã, Portugal.
- Functional Proteomics Laboratory, Centro Nacional de Biotecnología (CNB-CSIC), Unidad de Proteomica, Calle Darwin 3, Campus de Cantoblanco, 28049, Madrid, Spain.
| | - Sergio Ciordia
- Functional Proteomics Laboratory, Centro Nacional de Biotecnología (CNB-CSIC), Unidad de Proteomica, Calle Darwin 3, Campus de Cantoblanco, 28049, Madrid, Spain
| | - Joana Mesquita
- Health Sciences Research Centre (CICS-UBI), Universidade da Beira Interior, 6201-001, Covilhã, Portugal
| | - João Paulo Castro de Sousa
- Health Sciences Research Centre (CICS-UBI), Universidade da Beira Interior, 6201-001, Covilhã, Portugal
- Department of Ophthalmology, Centro Hospitalar de Leiria, 2410-197, Leiria, Portugal
| | - Alberto Paradela
- Functional Proteomics Laboratory, Centro Nacional de Biotecnología (CNB-CSIC), Unidad de Proteomica, Calle Darwin 3, Campus de Cantoblanco, 28049, Madrid, Spain
| | - Cândida Teixeira Tomaz
- Health Sciences Research Centre (CICS-UBI), Universidade da Beira Interior, 6201-001, Covilhã, Portugal
- C4-UBI, Cloud Computing Competence Centre, University of Beira Interior, 6200-501, Covilhã, Portugal
- Chemistry Department, Faculty of Sciences, Universidade da Beira Interior, 6201-001, Covilhã, Portugal
| | - Luís António Paulino Passarinha
- Health Sciences Research Centre (CICS-UBI), Universidade da Beira Interior, 6201-001, Covilhã, Portugal.
- Associate Laboratory i4HB, Faculdade de Ciências e Tecnologia, Institute for Health and Bioeconomy, Universidade NOVA, 2819-516, Caparica, Portugal.
- UCIBIO-Applied Molecular Biosciences Unit, Departamento de Química, Faculdade de Ciências e Tecnologia, Universidade NOVA de Lisboa, 2829-516, Caparica, Portugal.
- Pharmaco-Toxicology Laboratory, UBIMedical, Universidade da Beira Interior, 6200-000, Covilhã, Portugal.
| |
Collapse
|
39
|
Wu SF, Lin CY, Tsai RK, Wen YT, Lin FH, Chang CY, Shen CI, Lin SZ, Harn HJ, Chiou TW, Liu CS, Chen YT, Su HL. Mitochondrial Transplantation Moderately Ameliorates Retinal Degeneration in Royal College of Surgeons Rats. Biomedicines 2022; 10:2883. [PMID: 36359403 PMCID: PMC9687640 DOI: 10.3390/biomedicines10112883] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2022] [Revised: 10/09/2022] [Accepted: 11/03/2022] [Indexed: 01/26/2024] Open
Abstract
Retinal pigmented epithelial (RPE) cells possess high mitochondria content for energy production, which is required for phagocytosis and vision cycle metabolism. The mitochondrial integrity in RPE cells helps the homeostasis of photoreceptor turnover and prevents retina aging and degeneration. Mitochondrial transplantation benefits the recovery of several acute inflammatory diseases, leading us to investigate the effects of mitochondrial transplantation on retina degeneration. Allogeneic mitochondria were isolated and delivered into the vitreous chamber in the Royal College of Surgeons (RCS) rats, which exhibit inherited and early-onset retina degeneration. The progress of retina degeneration was examined with optical coherence tomography (OCT) and visual evoked potential (VEP) to determine the retina thickness and integrity of afferent electrical signals from affected eyes, respectively. We found that mitochondria engraftment moderately attenuated the degeneration of retinal layers in RCS rats by histological examination. This result was consistent with the OCT measurement of retina thickness around the optic disc. The VEP analysis revealed that the peak one (N1) latency, representing the arriving time of electrical impulse from the retina to cortex, was substantially maintained as the normal value after the mitochondrial transplantation. This result suggests that the intra-vitreous transplanted mitochondria ameliorate the degeneration of photoreceptors in RCS rats and might be potential for clinical application.
Collapse
Affiliation(s)
- Shih-Fang Wu
- The Joint Ph.D. Program in Tissue Engineering and Regenerative Medicine, National Health Research Institutes and National Chung Hsing University, Taichung 402, Taiwan
| | - Chih-Yao Lin
- Department of Life Sciences, National Chung Hsing University, Taichung 402, Taiwan
| | - Rong-Kung Tsai
- Institute of Eye Research, Buddhist Tzu Chi Hospital, Hualien 970, Taiwan
| | - Yao-Tseng Wen
- Institute of Eye Research, Buddhist Tzu Chi Hospital, Hualien 970, Taiwan
| | - Feng-Huei Lin
- Institute of Biomedical Engineering and Nanomedicine, National Health Research Institutes, Miaoli 350, Taiwan
| | - Chia-Yu Chang
- Bioinnovation Center, Buddhist Tzu Chi Medical Foundation, Hualien 970, Taiwan
| | - Ching-I Shen
- Duogenic Stem Cells Corporation, Taichung 402, Taiwan
| | - Shinn-Zong Lin
- Bioinnovation Center, Buddhist Tzu Chi Medical Foundation, Hualien 970, Taiwan
- Department of Neurosurgery, Buddhist Tzu Chi Medical Foundation, Hualien 970, Taiwan
| | - Horng-Jyh Harn
- Bioinnovation Center, Buddhist Tzu Chi Medical Foundation, Hualien 970, Taiwan
- Department of Pathology, Buddhist Tzu Chi Medical Foundation, Hualien 970, Taiwan
| | - Tzyy-Wen Chiou
- Department of Life Science and Graduate Institute of Biotechnology, National Dong Hwa University, Hualien 974, Taiwan
| | - Chin-San Liu
- Vascular and Genomic Center, Changhua Christian Hospital, Changhua 500, Taiwan
- Departments of Neurology, Changhua Christian Hospital, Changhua 500, Taiwan
| | - Yan-Ting Chen
- Departments of Ophthalmology, Changhua Christian Hospital, Changhua 500, Taiwan
| | - Hong-Lin Su
- Department of Life Sciences, National Chung Hsing University, Taichung 402, Taiwan
| |
Collapse
|
40
|
Zhan P, Cui Y, Cao Y, Bao X, Wu M, Yang Q, Yang J, Zheng H, Zou J, Xie T, Cai J, Yao Y, Wang X. PGE 2 promotes macrophage recruitment and neovascularization in murine wet-type AMD models. Cell Commun Signal 2022; 20:155. [PMID: 36229856 PMCID: PMC9558420 DOI: 10.1186/s12964-022-00973-6] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2021] [Accepted: 09/18/2022] [Indexed: 11/24/2022] Open
Abstract
Age-related macular degeneration (AMD), a progressive chronic disease of the central retina, is a leading cause of blindness worldwide. Activated macrophages recruited to the injured eyes greatly contribute to the pathogenesis of choroidal neovascularization (CNV) in exudative AMD (wet AMD). This study describes the effects of cyclooxygenase-2 (COX2)/prostaglandin E2 (PGE2) signalling on the macrophage activation and CNV formation of wet AMD. In a mouse model of laser-induced wet AMD, the mice received an intravitreal injection of celecoxib (a selective COX2 inhibitor). Optical coherence tomography (OCT), fundus fluorescein angiography (FFA), choroidal histology of the CNV lesions, and biochemical markers were assessed. The level of PGE2 expression was high in the laser-induced CNV lesions. Macrophage recruitment and CNV development were significantly less after celecoxib treatment. E-prostanoid1 receptor (EP1R)/protein kinase C (PKC) signalling was involved in M2 macrophage activation and interleukin-10 (IL-10) production of bone marrow-derived macrophages (BMDMs) in vitro. In addition, IL-10 was found to induce the proliferation and migration of human choroidal microvascular endothelial cells (HCECs). Thus, the PGE2/EP1R signalling network serves as a potential therapeutic target for CNV of the wet-type AMD.
Collapse
Affiliation(s)
- Pengfei Zhan
- Department of Ophthalmology, The Affiliated Wuxi People's Hospital of Nanjing Medical University, 299 Qingyang Road, Wuxi, 214023, Jiangsu, People's Republic of China
| | - Yuqing Cui
- Department of Ophthalmology, The Affiliated Wuxi People's Hospital of Nanjing Medical University, 299 Qingyang Road, Wuxi, 214023, Jiangsu, People's Republic of China
| | - Yujuan Cao
- Department of Ophthalmology, The Affiliated Wuxi People's Hospital of Nanjing Medical University, 299 Qingyang Road, Wuxi, 214023, Jiangsu, People's Republic of China.,Center of Clinical Research, The Affiliated Wuxi People's Hospital of Nanjing Medical University, 299 Qingyang Road, Wuxi, 214023, Jiangsu, People's Republic of China.,Department of Ophthalmology, The Affiliated Wuxi No.2 People's Hospital of Nanjing Medical University, Wuxi, 214023, Jiangsu, People's Republic of China
| | - Xun Bao
- Department of Ophthalmology, The Affiliated Wuxi People's Hospital of Nanjing Medical University, 299 Qingyang Road, Wuxi, 214023, Jiangsu, People's Republic of China
| | - Meili Wu
- Center of Clinical Research, The Affiliated Wuxi People's Hospital of Nanjing Medical University, 299 Qingyang Road, Wuxi, 214023, Jiangsu, People's Republic of China
| | - Qian Yang
- Department of Ophthalmology, The Affiliated Wuxi People's Hospital of Nanjing Medical University, 299 Qingyang Road, Wuxi, 214023, Jiangsu, People's Republic of China
| | - Jiahui Yang
- Department of Ophthalmology, The Affiliated Wuxi People's Hospital of Nanjing Medical University, 299 Qingyang Road, Wuxi, 214023, Jiangsu, People's Republic of China
| | - Haohan Zheng
- Department of Ophthalmology, The Affiliated Wuxi People's Hospital of Nanjing Medical University, 299 Qingyang Road, Wuxi, 214023, Jiangsu, People's Republic of China
| | - Jian Zou
- Center of Clinical Research, The Affiliated Wuxi People's Hospital of Nanjing Medical University, 299 Qingyang Road, Wuxi, 214023, Jiangsu, People's Republic of China
| | - Tianhua Xie
- Department of Ophthalmology, The Affiliated Wuxi People's Hospital of Nanjing Medical University, 299 Qingyang Road, Wuxi, 214023, Jiangsu, People's Republic of China
| | - Jiping Cai
- Department of Ophthalmology, The Affiliated Wuxi People's Hospital of Nanjing Medical University, 299 Qingyang Road, Wuxi, 214023, Jiangsu, People's Republic of China
| | - Yong Yao
- Department of Ophthalmology, The Affiliated Wuxi People's Hospital of Nanjing Medical University, 299 Qingyang Road, Wuxi, 214023, Jiangsu, People's Republic of China. .,Department of Ophthalmology, The Affiliated Wuxi No.2 People's Hospital of Nanjing Medical University, Wuxi, 214023, Jiangsu, People's Republic of China.
| | - Xiaolu Wang
- Center of Clinical Research, The Affiliated Wuxi People's Hospital of Nanjing Medical University, 299 Qingyang Road, Wuxi, 214023, Jiangsu, People's Republic of China.
| |
Collapse
|
41
|
The Effect of Dietary Supplementations on Delaying the Progression of Age-Related Macular Degeneration: A Systematic Review and Meta-Analysis. Nutrients 2022; 14:nu14204273. [PMID: 36296956 PMCID: PMC9610847 DOI: 10.3390/nu14204273] [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: 09/13/2022] [Revised: 10/07/2022] [Accepted: 10/11/2022] [Indexed: 11/16/2022] Open
Abstract
Purpose: Age-related macular degeneration (AMD) is a neurodegenerative ophthalmic disease. The purpose of this systematic review (SR) and meta-analysis was to evaluate if dietary supplementation alone or in combinations might delay the progression of any of the stages of AMD. Methods: A SR and meta-analysis identifying cohort studies and randomized controlled trials (RCTs) evaluating the effect of supplements in patients diagnosed with AMD. PubMed, Scopus, Web of Science, CINHAL, and Cochrane were searched through 8th October 2021. Results: Twenty studies, examining 5634 participants ranging from 55 to 80 years, were included in the SR. Eight studies were selected for meta-analysis (414 and 216 subjects in the intervention and control groups). Lutein and zeaxanthin plus n-3 long-chain polyunsaturated fatty acids (n-3 LC-PUFA) supplementation showed significant improvements in best-corrected visual acuity (BCVA) (SMD: −1.99, 95% CI: −3.33, −0.65) compared to the control group. Multifocal electroretinogram results (mfERG) were significantly improved overall (SMD: 4.59, 95% CI: 1.75, 7.43) after L plus Z supplementation. Conclusions: Combinations of lutein and zeaxanthin with n-3 LC-PUFA might be beneficial in preventing AMD progression and deterioration of visual function. Our results encourage initiating further studies with combinations of n-3 LC-PUFA, lutein, and zeaxanthin especially in early AMD patients.
Collapse
|
42
|
Targeting Phospholipase D Pharmacologically Prevents Phagocytic Function Loss of Retinal Pigment Epithelium Cells Exposed to High Glucose Levels. Int J Mol Sci 2022; 23:ijms231911823. [PMID: 36233124 PMCID: PMC9570224 DOI: 10.3390/ijms231911823] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2022] [Revised: 09/23/2022] [Accepted: 10/01/2022] [Indexed: 11/17/2022] Open
Abstract
We previously described the participation of canonical phospholipase D isoforms (PLD1 and PLD2) in the inflammatory response of retinal pigment epithelium (RPE) cells exposed to high glucose concentrations (HG). Here, we studied the role of the PLD pathway in RPE phagocytic function. For this purpose, ARPE-19 cells were exposed to HG (33 mM) or to normal glucose concentration (NG, 5.5 mM) and phagocytosis was measured using pHrodo™ green bioparticles® or photoreceptor outer segments (POS). HG exposure for 48 and 72 h reduced phagocytic function of ARPE-19 cells, and this loss of function was prevented when cells were treated with 5 μM of PLD1 (VU0359595 or PLD1i) or PLD2 (VU0285655-1 or PLD2i) selective inhibitors. Furthermore, PLD1i and PLD2i did not affect RPE phagocytosis under physiological conditions and prevented oxidative stress induced by HG. In addition, we demonstrated PLD1 and PLD2 expression in ABC cells, a novel human RPE cell line. Under physiological conditions, PLD1i and PLD2i did not affect ABC cell viability, and partial silencing of both PLDs did not affect ABC cell POS phagocytosis. In conclusion, PLD1i and PLD2i prevent the loss of phagocytic function of RPE cells exposed to HG without affecting RPE function or viability under non-inflammatory conditions.
Collapse
|
43
|
Huang S, Liu K, Su Y, Wang F, Feng T. Research progress of ferroptosis in glaucoma and optic nerve damage. Mol Cell Biochem 2022; 478:721-727. [PMID: 36053395 DOI: 10.1007/s11010-022-04545-7] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2022] [Accepted: 08/12/2022] [Indexed: 10/14/2022]
Abstract
Unlike other death forms, such as autophagy, necrosis, and apoptosis, ferroptosis is a novel type of programmed cell death with iron-dependent properties. Esteroxygenase affects the content of unsaturated fatty acids and promotes lipid peroxidation. In addition, GSH can cause the reduction of GPX4, which can cause ferroptosis. P53 and its signaling pathways also regulate ferroptosis. Recent studies have confirmed that ferroptosis also promotes the death of RGC. The progressive loss of RGC is one of the pathological features of glaucoma, indicating that ferroptosis may be related to the onset of glaucoma. Down-regulation of GPX4 leads to the loss of nerve cells, which suggests that ferroptosis may also be related to diseases related to optic nerve damage. At present, ferroptosis has been extensively researched and advanced in systemic diseases, such as cardiovascular diseases, gastrointestinal tumors such as stomach, liver, and pancreas, and brain diseases. This review focuses on the research progress of ferroptosis in ophthalmic diseases, especially glaucoma and optic nerve damage.
Collapse
Affiliation(s)
- Sijia Huang
- Department of Ophthalmology, The Fourth Affiliated Hospital of Harbin Medical University, Harbin, China
| | - Kexin Liu
- Department of Ophthalmology, The Fourth Affiliated Hospital of Harbin Medical University, Harbin, China
| | - Ying Su
- Eye Hospital, The First Affiliated Hospital Harbin Medical University, Harbin, 150001, China
| | - Feng Wang
- Department of Ophthalmology, The Fourth Affiliated Hospital of Harbin Medical University, Harbin, China.
| | - Tao Feng
- Department of Neurology, The Hospital of Heilongjiang Province, Harbin, 150036, China
| |
Collapse
|
44
|
Construction of a ferroptosis-associated circRNA-miRNA-mRNA network in age-related macular degeneration. Exp Eye Res 2022; 224:109234. [PMID: 36044964 DOI: 10.1016/j.exer.2022.109234] [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: 05/30/2022] [Revised: 08/14/2022] [Accepted: 08/22/2022] [Indexed: 11/23/2022]
Abstract
Age-related macular degeneration (AMD) is a leading cause of severe vision impairment in the aging population. However, the underlying molecular mechanism remains unclear. Ferroptosis is a novel non-apoptotic programmed cell death pathway, that contributes to AMD. In addition, non-coding RNA-led epigenetic profile was identified in the regulation of AMD progression. Considering that non-coding RNAs are vital regulators of ferroptosis-related genes in various pathological events, we explored and constructed a ferroptosis-associated circRNA-miRNA-mRNA network in AMD. Differential expression of fourteen ferroptosis-associated genes were identified based on our microarray analysis and the FerrDb tool at the threshold of P < 0.05 and log2|fold change| ≥ 1, which were subsequently validated by the public datasets. We further screened eight miRNAs via public datasets and the miRNet database. Based on these eight miRNAs, 23 circRNAs were mined using the Starbase tool. Taking all these together, we obtained a ferroptosis-related network with 414 pairs of circRNA-miRNA-mRNA, which are potential targets in future AMD treatments.
Collapse
|
45
|
Telegina DV, Antonenko AK, Fursova AZ, Kolosova NG. The glutamate/GABA system in the retina of male rats: effects of aging, neurodegeneration, and supplementation with melatonin and antioxidant SkQ1. Biogerontology 2022; 23:571-585. [PMID: 35969289 DOI: 10.1007/s10522-022-09983-w] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2022] [Accepted: 07/20/2022] [Indexed: 11/02/2022]
Abstract
Glutamate and -aminobutyric acid (GABA) are the most abundant amino acids in the retina. An imbalance of the glutamate/GABA system is involved in the pathogenesis of various neurodegenerative disorders. Here we for the first time analyzed alterations of expression of glutamate- and GABA-synthesizing enzymes, transporters, and relevant receptors in the retina with age in Wistar rats and in senescence-accelerated OXYS rats who develop AMD-like retinopathy. We noted consistent age-dependent expression changes of GABAergic-system proteins (GAD67, GABA-T, and GAT1) in OXYS and Wistar rats: upregulation by age 3 months and downregulation at age 18 months. At a late stage of AMD-like retinopathy in OXYS rats (18 months), there was significant upregulation of glutaminase and downregulation of glutamine synthetase, possibly indicating an increasing level of glutamate in the retina. AMD-like-retinopathy development in the OXYS strain was accompanied by underexpression of glutamate transporter GLAST. Prolonged supplementation with both melatonin and SkQ1 (separately) suppressed the progression of the AMD-like pathology in OXYS rats without affecting the glutamate/GABA system but worsened the condition of the Wistar rat's retina during normal aging. We observed decreasing protein levels of glutamine synthetase, GLAST, and GABAAR1 and an increasing level of glutaminase in Wistar rats. In summary, both melatonin and mitochondrial antioxidant SkQ1 had different effect on the retinal glutamate / GABA in healthy Wistar and senescence-accelerated OXYS rats.
Collapse
|
46
|
Kaczynski TJ, Au ED, Farkas MH. Exploring the lncRNA localization landscape within the retinal pigment epithelium under normal and stress conditions. BMC Genomics 2022; 23:539. [PMID: 35883037 PMCID: PMC9327364 DOI: 10.1186/s12864-022-08777-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2022] [Accepted: 07/14/2022] [Indexed: 11/20/2022] Open
Abstract
Background Long noncoding RNAs (lncRNAs) are emerging as a class of genes whose importance has yet to be fully realized. It is becoming clear that the primary function of lncRNAs is to regulate gene expression, and they do so through a variety of mechanisms that are critically tied to their subcellular localization. Although most lncRNAs are poorly understood, mapping lncRNA subcellular localization can provide a foundation for understanding these mechanisms. Results Here, we present an initial step toward uncovering the localization landscape of lncRNAs in the human retinal pigment epithelium (RPE) using high throughput RNA-Sequencing (RNA-Seq). To do this, we differentiated human induced pluripotent stem cells (iPSCs) into RPE, isolated RNA from nuclear and cytoplasmic fractions, and performed RNA-Seq on both. Furthermore, we investigated lncRNA localization changes that occur in response to oxidative stress. We discovered that, under normal conditions, most lncRNAs are seen in both the nucleus and the cytoplasm to a similar degree, but of the transcripts that are highly enriched in one compartment, far more are nuclear than cytoplasmic. Interestingly, under oxidative stress conditions, we observed an increase in lncRNA localization in both nuclear and cytoplasmic fractions. In addition, we found that nuclear localization was partially attributable to the presence of previously described nuclear retention motifs, while adenosine to inosine (A-to-I) RNA editing appeared to play a very minimal role. Conclusions Our findings map lncRNA localization in the RPE and provide two avenues for future research: 1) how lncRNAs function in the RPE, and 2) how one environmental factor, in isolation, may potentially play a role in retinal disease pathogenesis through altered lncRNA localization. Supplementary Information The online version contains supplementary material available at 10.1186/s12864-022-08777-1.
Collapse
Affiliation(s)
- Tadeusz J Kaczynski
- Department of Ophthalmology, State University of New York at Buffalo, Buffalo, NY, USA.,Research Service, VA Medical Center, Buffalo, NY, USA
| | - Elizabeth D Au
- Department of Ophthalmology, State University of New York at Buffalo, Buffalo, NY, USA
| | - Michael H Farkas
- Department of Ophthalmology, State University of New York at Buffalo, Buffalo, NY, USA. .,Research Service, VA Medical Center, Buffalo, NY, USA. .,Department of Biochemistry, State University of New York at Buffalo, Buffalo, NY, USA.
| |
Collapse
|
47
|
Multi-Target Effects of ß-Caryophyllene and Carnosic Acid at the Crossroads of Mitochondrial Dysfunction and Neurodegeneration: From Oxidative Stress to Microglia-Mediated Neuroinflammation. Antioxidants (Basel) 2022; 11:antiox11061199. [PMID: 35740096 PMCID: PMC9220155 DOI: 10.3390/antiox11061199] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2022] [Revised: 06/13/2022] [Accepted: 06/17/2022] [Indexed: 01/27/2023] Open
Abstract
Inflammation and oxidative stress are interlinked and interdependent processes involved in many chronic diseases, including neurodegeneration, diabetes, cardiovascular diseases, and cancer. Therefore, targeting inflammatory pathways may represent a potential therapeutic strategy. Emerging evidence indicates that many phytochemicals extracted from edible plants have the potential to ameliorate the disease phenotypes. In this scenario, ß-caryophyllene (BCP), a bicyclic sesquiterpene, and carnosic acid (CA), an ortho-diphenolic diterpene, were demonstrated to exhibit anti-inflammatory, and antioxidant activities, as well as neuroprotective and mitoprotective effects in different in vitro and in vivo models. BCP essentially promotes its effects by acting as a selective agonist and allosteric modulator of cannabinoid type-2 receptor (CB2R). CA is a pro-electrophilic compound that, in response to oxidation, is converted to its electrophilic form. This can interact and activate the Keap1/Nrf2/ARE transcription pathway, triggering the synthesis of endogenous antioxidant “phase 2” enzymes. However, given the nature of its chemical structure, CA also exhibits direct antioxidant effects. BCP and CA can readily cross the BBB and accumulate in brain regions, giving rise to neuroprotective effects by preventing mitochondrial dysfunction and inhibiting activated microglia, substantially through the activation of pro-survival signalling pathways, including regulation of apoptosis and autophagy, and molecular mechanisms related to mitochondrial quality control. Findings from different in vitro/in vivo experimental models of Parkinson’s disease and Alzheimer’s disease reported the beneficial effects of both compounds, suggesting that their use in treatments may be a promising strategy in the management of neurodegenerative diseases aimed at maintaining mitochondrial homeostasis and ameliorating glia-mediated neuroinflammation.
Collapse
|
48
|
Mallik S, Grodstein F, Bennett DA, Vavvas DG, Lemos B. Novel Epigenetic Clock Biomarkers of Age-Related Macular Degeneration. Front Med (Lausanne) 2022; 9:856853. [PMID: 35783640 PMCID: PMC9244395 DOI: 10.3389/fmed.2022.856853] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2022] [Accepted: 05/19/2022] [Indexed: 01/05/2023] Open
Abstract
Age-Related Macular Degeneration (AMD) is a bilateral ocular condition resulting in irreversible vision impairment caused by the progressive loss of photoreceptors in the macula, a region at the center of the retina. The progressive loss of photoreceptor is a key feature of dry AMD but not always wet AMD, though both forms of AMD can lead to loss of vision. Regression-based biological age clocks are one of the most promising biomarkers of aging but have not yet been used in AMD. Here we conducted analyses to identify regression-based biological age clocks for the retina and explored their use in AMD using transcriptomic data consisting of a total of 453 retina samples including 105 Minnesota Grading System (MGS) level 1 samples, 175 MGS level 2, 112 MGS level 3 and 61 MGS level 4 samples, as well as 167 fibroblast samples. The clocks yielded good separation among AMD samples with increasing severity score viz., MGS1-4, regardless of whether clocks were trained in retina tissue, dermal fibroblasts, or in combined datasets. Clock application to cultured fibroblasts, embryonic stem cells, and induced Pluripotent Stem Cells (iPSCs) were consistent with age reprograming in iPSCs. Moreover, clock application to in vitro neuronal differentiation suggests broader applications. Interesting, many of the age clock genes identified include known targets mechanistically linked to AMD and aging, such as GDF11, C16ORF72, and FBN2. This study provides new observations for retina age clocks and suggests new applications for monitoring in vitro neuronal differentiation. These clocks could provide useful markers for AMD monitoring and possible intervention, as well as potential targets for in vitro screens.
Collapse
Affiliation(s)
- Saurav Mallik
- Program in Molecular and Integrative Physiological Sciences, Department of Environmental Health, Harvard T. H. Chan School of Public Health, Boston, MA, United States
| | - Fran Grodstein
- Rush Alzheimer’s Disease Center, Rush University Medical Center, Chicago, IL, United States
| | - David A. Bennett
- Rush Alzheimer’s Disease Center, Rush University Medical Center, Chicago, IL, United States
| | - Demetrios G. Vavvas
- Ines and Frederick Yeatts Retina Research Laboratory, Retina Service, Department of Ophthalmology, Mass Eye and Ear, Harvard Medical School, Boston, MA, United States
| | - Bernardo Lemos
- Program in Molecular and Integrative Physiological Sciences, Department of Environmental Health, Harvard T. H. Chan School of Public Health, Boston, MA, United States,Broad Institute of Harvard and MIT, Cambridge, MA, United States,*Correspondence: Bernardo Lemos,
| |
Collapse
|
49
|
Scheffer M, Menting J, Roodbeen R, van Dulmen S, van Hecke M, Schlingemann R, van Nispen R, Boeije H. Patients' and health professionals' views on shared decision‐making in age‐related macular degeneration care: A qualitative study. Ophthalmic Physiol Opt 2022; 42:1015-1022. [DOI: 10.1111/opo.13016] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2022] [Revised: 05/08/2022] [Accepted: 05/09/2022] [Indexed: 12/13/2022]
Affiliation(s)
- Mariska Scheffer
- Department of Care and Participation of People with Chronic Conditions Netherlands Institute for Health Services Research (Nivel) Utrecht The Netherlands
| | - Juliane Menting
- Department of Care and Participation of People with Chronic Conditions Netherlands Institute for Health Services Research (Nivel) Utrecht The Netherlands
| | - Ruud Roodbeen
- Department of Research Breuer&Intraval Research and Consultancy Groningen The Netherlands
| | - Sandra van Dulmen
- Department of Communication in Healthcare Netherlands Institute for Health Services Research (Nivel) Utrecht The Netherlands
- Department of Primary and Community Care Radboud University Medical Center Radboud Institute for Health Sciences Nijmegen The Netherlands
- Faculty of Caring Science University of Borås Borås Sweden
| | - Manon van Hecke
- Department of Ophthalmology Elisabeth‐TweeSteden Ziekenhuis Tilburg The Netherlands
| | - Reinier Schlingemann
- Department of Ophthalmology, Amsterdam UMC University of Amsterdam Amsterdam The Netherlands
- Bergman Clinics Ogen Amsterdam The Netherlands
- Department of Ophthalmology, University of Lausanne Jules‐Gonin Eye Hospital, Fondation Asile des Aveugles Lausanne Switzerland
| | - Ruth van Nispen
- Department of Ophthalmology, Amsterdam UMC, Vrije Universiteit Amsterdam Public Health Research Institute Amsterdam The Netherlands
| | - Hennie Boeije
- Department of Care and Participation of People with Chronic Conditions Netherlands Institute for Health Services Research (Nivel) Utrecht The Netherlands
| |
Collapse
|
50
|
Rasoulinejad SA, Sarreshtehdari N, Mafi AR. The crosstalk between VEGF signaling pathway and long non-coding RNAs in neovascular retinal diseases: Implications for anti-VEGF therapy. GENE REPORTS 2022. [DOI: 10.1016/j.genrep.2022.101541] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
|