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Attallah A, Ardourel M, Gallazzini F, Lesne F, De Oliveira A, Togbé D, Briault S, Perche O. Lack of FMRP in the retina: Evidence of a retinal specific transcriptomic profile. Exp Eye Res 2024; 246:110015. [PMID: 39089568 DOI: 10.1016/j.exer.2024.110015] [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: 03/27/2024] [Revised: 07/11/2024] [Accepted: 07/30/2024] [Indexed: 08/04/2024]
Abstract
Fragile X Syndrome (FXS), the most common inherited form of human intellectual disability, is a monogenic neurodevelopmental disorder caused by a loss-of-function mutation of the FMR1 gene. FMR1 is encoding the Fragile X Messenger Ribonucleo Protein (FMRP) an RNA-binding protein that regulates the translation of synaptic proteins. The absence of FMRP expression has many important consequences on synaptic plasticity and function, leading to the FXS clinical phenotype. Over the last decade, a visual neurosensorial phenotype had been described in the FXS patients as well as in the murine model (Fmr1-/ymice), characterized by retinal deficits associated to retinal perception alterations. However, although the transcriptomic profile in the absence of FMRP has been studied in the cerebral part of the central nervous system (CNS), there are no actual data for the retina which is an extension of the CNS. Herein, we investigate the transcriptomic profile of mRNA from whole retinas of Fmr1-/ymice. Interestingly, we found a specific signature of Fmrp absence on retinal mRNA expression with few common genes compared to other brain studies. Gene Ontology on these retinal specific genes demonstrated an enrichment in retinal development genes as well as in synaptic genes. These alterations could be linked to the reported retinal phenotype of the FXS condition. In conclusion, we describe for the first time, retinal-specific transcriptomic changes in the absence of FMRP.
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Affiliation(s)
- Amir Attallah
- Orléans University, University Hospital Center of Orleans, LI(2)RSO, 14, Avenue de l'hôpital, 45100, Orléans, France; Orleans University, CNRS, laboratoire INEM, UMR7355, 3b Rue de la Férollerie, F-45071, Orléans, Cedex 2, France; ART ARNm US55, 14 Avenue de l'Hôpital, 45100, Orléans, France
| | - Maryvonne Ardourel
- Orléans University, University Hospital Center of Orleans, LI(2)RSO, 14, Avenue de l'hôpital, 45100, Orléans, France; ART ARNm US55, 14 Avenue de l'Hôpital, 45100, Orléans, France
| | - Felix Gallazzini
- University Hospital Center of Orleans, Genetic Department, 14 Avenue de l'Hôpital, 45100, Orléans, France
| | - Fabien Lesne
- University Hospital Center of Orléans CAR&IB, Pôle Biopatholgie, 14 Avenue de l'Hôpital, 45100, Orléans, France
| | - Anthony De Oliveira
- University Hospital Center of Orléans CAR&IB, Pôle Biopatholgie, 14 Avenue de l'Hôpital, 45100, Orléans, France
| | - Dieudonnée Togbé
- Orleans University, CNRS, laboratoire INEM, UMR7355, 3b Rue de la Férollerie, F-45071, Orléans, Cedex 2, France
| | - Sylvain Briault
- Orléans University, University Hospital Center of Orleans, LI(2)RSO, 14, Avenue de l'hôpital, 45100, Orléans, France; ART ARNm US55, 14 Avenue de l'Hôpital, 45100, Orléans, France; University Hospital Center of Orleans, Genetic Department, 14 Avenue de l'Hôpital, 45100, Orléans, France
| | - Olivier Perche
- Orléans University, University Hospital Center of Orleans, LI(2)RSO, 14, Avenue de l'hôpital, 45100, Orléans, France; ART ARNm US55, 14 Avenue de l'Hôpital, 45100, Orléans, France; University Hospital Center of Orleans, Genetic Department, 14 Avenue de l'Hôpital, 45100, Orléans, France.
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2
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Shahror RA, Shosha E, Morris C, Wild M, Mu S, Csanyi G, Boerma M, Rusch NJ, Fouda AY. Deletion of myeloid HDAC3 promotes efferocytosis to ameliorate retinal ischemic injury. J Neuroinflammation 2024; 21:170. [PMID: 38997746 PMCID: PMC11241909 DOI: 10.1186/s12974-024-03159-8] [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: 03/19/2024] [Accepted: 06/24/2024] [Indexed: 07/14/2024] Open
Abstract
Ischemia-induced retinopathy is a hallmark finding of common visual disorders including diabetic retinopathy (DR) and central retinal artery and vein occlusions. Treatments for ischemic retinopathies fail to improve clinical outcomes and the design of new therapies will depend on understanding the underlying disease mechanisms. Histone deacetylases (HDACs) are an enzyme class that removes acetyl groups from histone and non-histone proteins, thereby regulating gene expression and protein function. HDACs have been implicated in retinal neurovascular injury in preclinical studies in which nonspecific HDAC inhibitors mitigated retinal injury. Histone deacetylase 3 (HDAC3) is a class I histone deacetylase isoform that plays a central role in the macrophage inflammatory response. We recently reported that myeloid cells upregulate HDAC3 in a mouse model of retinal ischemia-reperfusion (IR) injury. However, whether this cellular event is an essential contributor to retinal IR injury is unknown. In this study, we explored the role of myeloid HDAC3 in ischemia-induced retinal neurovascular injury by subjecting myeloid-specific HDAC3 knockout (M-HDAC3 KO) and floxed control mice to retinal IR. The M-HDAC3 KO mice were protected from retinal IR injury as shown by the preservation of inner retinal neurons, vascular integrity, and retinal thickness. Electroretinography confirmed that this neurovascular protection translated to improved retinal function. The retinas of M-HDAC3 KO mice also showed less proliferation and infiltration of myeloid cells after injury. Interestingly, myeloid cells lacking HDAC3 more avidly engulfed apoptotic cells in vitro and after retinal IR injury in vivo compared to wild-type myeloid cells, suggesting that HDAC3 hinders the reparative phagocytosis of dead cells, a process known as efferocytosis. Further mechanistic studies indicated that although HDAC3 KO macrophages upregulate the reparative enzyme arginase 1 (A1) that enhances efferocytosis, the inhibitory effect of HDAC3 on efferocytosis is not solely dependent on A1. Finally, treatment of wild-type mice with the HDAC3 inhibitor RGFP966 ameliorated the retinal neurodegeneration and thinning caused by IR injury. Collectively, our data show that HDAC3 deletion enhances macrophage-mediated efferocytosis and protects against retinal IR injury, suggesting that inhibiting myeloid HDAC3 holds promise as a novel therapeutic strategy for preserving retinal integrity after ischemic insult.
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Affiliation(s)
- Rami A Shahror
- Department of Pharmacology and Toxicology College of Medicine, University of Arkansas for Medical Sciences (UAMS), 4301 West Markham Street, Slot 611, BIOMED-1, B306, Little Rock, Office, AR, 72205, USA
| | - Esraa Shosha
- Department of Pharmacology and Toxicology College of Medicine, University of Arkansas for Medical Sciences (UAMS), 4301 West Markham Street, Slot 611, BIOMED-1, B306, Little Rock, Office, AR, 72205, USA
- Clinical Pharmacy Department, Cairo University, Cairo, Egypt
| | - Carol Morris
- Department of Pharmacology and Toxicology College of Medicine, University of Arkansas for Medical Sciences (UAMS), 4301 West Markham Street, Slot 611, BIOMED-1, B306, Little Rock, Office, AR, 72205, USA
| | - Melissa Wild
- Department of Pharmacology and Toxicology College of Medicine, University of Arkansas for Medical Sciences (UAMS), 4301 West Markham Street, Slot 611, BIOMED-1, B306, Little Rock, Office, AR, 72205, USA
| | - Shengyu Mu
- Department of Pharmacology and Toxicology College of Medicine, University of Arkansas for Medical Sciences (UAMS), 4301 West Markham Street, Slot 611, BIOMED-1, B306, Little Rock, Office, AR, 72205, USA
| | - Gabor Csanyi
- Department of Pharmacology and Vascular Biology Center, Augusta University, Augusta, GA, USA
| | - Marjan Boerma
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Arkansas for Medical Sciences, Little Rock, AR, USA
| | - Nancy J Rusch
- Department of Pharmacology and Toxicology College of Medicine, University of Arkansas for Medical Sciences (UAMS), 4301 West Markham Street, Slot 611, BIOMED-1, B306, Little Rock, Office, AR, 72205, USA
| | - Abdelrahman Y Fouda
- Department of Pharmacology and Toxicology College of Medicine, University of Arkansas for Medical Sciences (UAMS), 4301 West Markham Street, Slot 611, BIOMED-1, B306, Little Rock, Office, AR, 72205, USA.
- Clinical Pharmacy Department, Cairo University, Cairo, Egypt.
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Dou Y, Fei X, He X, Huan Y, Wei J, Wu X, Lyu W, Fei Z, Li X, Fei F. Homer1a reduces inflammatory response after retinal ischemia/reperfusion injury. Neural Regen Res 2024; 19:1608-1617. [PMID: 38051906 PMCID: PMC10883521 DOI: 10.4103/1673-5374.386490] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2023] [Accepted: 08/25/2023] [Indexed: 12/07/2023] Open
Abstract
Abstract
JOURNAL/nrgr/04.03/01300535-202407000-00042/figure1/v/2023-11-20T171125Z/r/image-tiff
Elevated intraocular pressure (IOP) is one of the causes of retinal ischemia/reperfusion injury, which results in NLRP3 inflammasome activation and leads to visual damage. Homer1a is reported to play a protective role in neuroinflammation in the cerebrum. However, the effects of Homer1a on NLRP3 inflammasomes in retinal ischemia/reperfusion injury caused by elevated IOP remain unknown. In our study, animal models were constructed using C57BL/6J and Homer1flox/
–/Homer1a+/
–/Nestin-Cre+/
– mice with elevated IOP-induced retinal ischemia/reperfusion injury. For in vitro experiments, the oxygen-glucose deprivation/reperfusion injury model was constructed with Müller cells. We found that Homer1a overexpression ameliorated the decreases in retinal thickness and Müller cell viability after ischemia/reperfusion injury. Furthermore, Homer1a knockdown promoted NF-κB P65Ser536 activation via caspase-8, NF-κB P65 nuclear translocation, NLRP3 inflammasome formation, and the production and processing of interleukin-1β and interleukin-18. The opposite results were observed with Homer1a overexpression. Finally, the combined administration of Homer1a protein and JSH-23 significantly inhibited the reduction in retinal thickness in Homer1flox/
–/Homer1a+/
–/Nestin-Cre+/
– mice and apoptosis in Müller cells after ischemia/reperfusion injury. Taken together, these studies demonstrate that Homer1a exerts protective effects on retinal tissue and Müller cells via the caspase-8/NF-κB P65/NLRP3 pathway after I/R injury.
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Affiliation(s)
- Yanan Dou
- Department of Neurosurgery, Xijing Hospital, Air Force Military Medical University, Xi'an, Shaanxi Province, China
| | - Xiaowei Fei
- Department of Neurosurgery, Xijing Hospital, Air Force Military Medical University, Xi'an, Shaanxi Province, China
| | - Xin He
- Department of Neurosurgery, Xijing Hospital, Air Force Military Medical University, Xi'an, Shaanxi Province, China
| | - Yu Huan
- Department of Neurosurgery, Xijing Hospital, Air Force Military Medical University, Xi'an, Shaanxi Province, China
| | - Jialiang Wei
- Department of Neurosurgery, Xijing Hospital, Air Force Military Medical University, Xi'an, Shaanxi Province, China
| | - Xiuquan Wu
- Department of Neurosurgery, Xijing Hospital, Air Force Military Medical University, Xi'an, Shaanxi Province, China
| | - Weihao Lyu
- Department of Neurosurgery, Xijing Hospital, Air Force Military Medical University, Xi'an, Shaanxi Province, China
| | - Zhou Fei
- Department of Neurosurgery, Xijing Hospital, Air Force Military Medical University, Xi'an, Shaanxi Province, China
| | - Xia Li
- Department of Neurosurgery, Xijing Hospital, Air Force Military Medical University, Xi'an, Shaanxi Province, China
| | - Fei Fei
- Department of Ophthalmology, Xijing Hospital, Air Force Military Medical University, Xi'an, Shaanxi Province, China
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4
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Daka Q, Neziri B, Lindner E, Azuara Blanco A. Metformin in Glaucoma Treatment. J Glaucoma 2024; 33:387-393. [PMID: 38536124 DOI: 10.1097/ijg.0000000000002387] [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: 11/18/2023] [Accepted: 03/07/2024] [Indexed: 06/01/2024]
Abstract
PRCIS Rigorous trials are essential to develop comprehensive treatment strategies that fully exploit the therapeutic potential of metformin in the treatment of glaucoma. OBJECTIVE The objective of this study was to evaluate the potentially beneficial effect of metformin on glaucoma risk factors and to investigate the underlying mechanisms. The aim is to contribute to the development of new treatment strategies for glaucoma. METHODS We searched for studies that assessed the effects of metformin on glaucoma risk factors and the associated underlying mechanisms. Our search included electronic databases such as PUBMED, EMBASE, and clinicaltrials.gov. RESULTS Unfortunately, we did not find any clinical trials that specifically investigated the impact of metformin on glaucoma. However, data from experimental studies demonstrated the capability of metformin to modulate various pathways that could contribute to neuroprotection in glaucoma. CONCLUSION In order to develop comprehensive treatment strategies that fully exploit the therapeutic potential of metformin in the treatment of glaucoma, rigorous trials are essential. These studies are necessary to demonstrate both the safety and efficacy of metformin in the context of glaucoma treatment.
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Affiliation(s)
- Qëndresë Daka
- Department of Pathophysiology, Medical Faculty, University of Prishtina, Prishtinë, Kosovo
- Department of Ophthalmology, University Clinical Centre of Kosova, Prishtinë, Kosovo
| | - Burim Neziri
- Department of Pathophysiology, Medical Faculty, University of Prishtina, Prishtinë, Kosovo
| | - Ewald Lindner
- Department of Ophthalmology, Medical University of Granz, Auenbruggerplatz, Granz, Austria
| | - Augusto Azuara Blanco
- Centre for Public Health, School of Medicine, Dentistry and Biomedical Sciences, Queen's University, Belfast, UK
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5
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Ng TF, Cho JY, Zhao JL, Gardiner JR, Wang ES, Leung E, Xu Z, Fineman SL, Lituchy M, Lo AC, Taylor AW. Alpha-Melanocyte-Stimulating Hormone Maintains Retinal Homeostasis after Ischemia/Reperfusion. Biomolecules 2024; 14:525. [PMID: 38785932 PMCID: PMC11118772 DOI: 10.3390/biom14050525] [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: 03/15/2024] [Revised: 04/23/2024] [Accepted: 04/24/2024] [Indexed: 05/25/2024] Open
Abstract
Augmenting the natural melanocortin pathway in mouse eyes with uveitis or diabetes protects the retinas from degeneration. The retinal cells are protected from oxidative and apoptotic signals of death. Therefore, we investigated the effects of a therapeutic application of the melanocortin alpha-melanocyte-stimulating hormone (α-MSH) on an ischemia and reperfusion (I/R) model of retinal degenerative disease. Eyes were subjected to an I/R procedure and were treated with α-MSH. Retinal sections were histopathologically scored. Also, the retinal sections were immunostained for viable ganglion cells, activated Muller cells, microglial cells, and apoptosis. The I/R caused retinal deformation and ganglion cell loss that was significantly reduced in I/R eyes treated with α-MSH. While α-MSH treatment marginally reduced the number of GFAP-positive Muller cells, it significantly suppressed the density of Iba1-positive microglial cells in the I/R retinas. Within one hour after I/R, there was apoptosis in the ganglion cell layer, and by 48 h, there was apoptosis in all layers of the neuroretina. The α-MSH treatment significantly reduced and delayed the onset of apoptosis in the retinas of I/R eyes. The results demonstrate that therapeutically augmenting the melanocortin pathways preserves retinal structure and cell survival in eyes with progressive neuroretinal degenerative disease.
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Affiliation(s)
- Tat Fong Ng
- Department of Ophthalmology, Boston University Chobanian & Avedesian School of Medicine, Boston, MA 02118, USA; (T.F.N.)
| | - Jenna Y. Cho
- Department of Ophthalmology, Boston University Chobanian & Avedesian School of Medicine, Boston, MA 02118, USA; (T.F.N.)
| | - John L. Zhao
- Department of Ophthalmology, Boston University Chobanian & Avedesian School of Medicine, Boston, MA 02118, USA; (T.F.N.)
| | - John R. Gardiner
- Department of Ophthalmology, Boston University Chobanian & Avedesian School of Medicine, Boston, MA 02118, USA; (T.F.N.)
| | - Eric S. Wang
- Department of Ophthalmology, Boston University Chobanian & Avedesian School of Medicine, Boston, MA 02118, USA; (T.F.N.)
| | - Elman Leung
- Department of Ophthalmology, Boston University Chobanian & Avedesian School of Medicine, Boston, MA 02118, USA; (T.F.N.)
| | - Ziqian Xu
- Department of Ophthalmology, Boston University Chobanian & Avedesian School of Medicine, Boston, MA 02118, USA; (T.F.N.)
| | - Samantha L. Fineman
- Department of Ophthalmology, Boston University Chobanian & Avedesian School of Medicine, Boston, MA 02118, USA; (T.F.N.)
| | - Melinda Lituchy
- Department of Ophthalmology, Boston University Chobanian & Avedesian School of Medicine, Boston, MA 02118, USA; (T.F.N.)
| | - Amy C. Lo
- Department of Ophthalmology, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Pokfulam, Hong Kong SAR, China
| | - Andrew W. Taylor
- Department of Ophthalmology, Boston University Chobanian & Avedesian School of Medicine, Boston, MA 02118, USA; (T.F.N.)
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6
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Qing KX, Lo ACY, Lu S, Zhou Y, Yang D, Yang D. Integrated bioinformatics analysis of retinal ischemia/reperfusion injury in rats with potential key genes. BMC Genomics 2024; 25:367. [PMID: 38622534 PMCID: PMC11017533 DOI: 10.1186/s12864-024-10288-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2023] [Accepted: 04/07/2024] [Indexed: 04/17/2024] Open
Abstract
The tissue damage caused by transient ischemic injury is an essential component of the pathogenesis of retinal ischemia, which mainly hinges on the degree and duration of interruption of the blood supply and the subsequent damage caused by tissue reperfusion. Some research indicated that the retinal injury induced by ischemia-reperfusion (I/R) was related to reperfusion time.In this study, we screened the differentially expressed circRNAs, lncRNAs, and mRNAs between the control and model group and at different reperfusion time (24h, 72h, and 7d) with the aid of whole transcriptome sequencing technology, and the trend changes in time-varying mRNA, lncRNA, circRNA were obtained by chronological analysis. Then, candidate circRNAs, lncRNAs, and mRNAs were obtained as the intersection of differentially expression genes and trend change genes. Importance scores of the genes selected the key genes whose expression changed with the increase of reperfusion time. Also, the characteristic differentially expressed genes specific to the reperfusion time were analyzed, key genes specific to reperfusion time were selected to show the change in biological process with the increase of reperfusion time.As a result, 316 candidate mRNAs, 137 candidate lncRNAs, and 31 candidate circRNAs were obtained by the intersection of differentially expressed mRNAs, lncRNAs, and circRNAs with trend mRNAs, trend lncRNAs and trend circRNAs, 5 key genes (Cd74, RT1-Da, RT1-CE5, RT1-Bb, RT1-DOa) were selected by importance scores of the genes. The result of GSEA showed that key genes were found to play vital roles in antigen processing and presentation, regulation of the actin cytoskeleton, and the ribosome. A network included 4 key genes (Cd74, RT1-Da, RT1-Bb, RT1-DOa), 34 miRNAs and 48 lncRNAs, and 81 regulatory relationship axes, and a network included 4 key genes (Cd74, RT1-Da, RT1-Bb, RT1-DOa), 9 miRNAs and 3 circRNAs (circRNA_10572, circRNA_03219, circRNA_11359) and 12 regulatory relationship axes were constructed, the subcellular location, transcription factors, signaling network, targeted drugs and relationship to eye diseases of key genes were predicted. 1370 characteristic differentially expressed mRNAs (spec_24h mRNA), 558 characteristic differentially expressed mRNAs (spec_72h mRNA), and 92 characteristic differentially expressed mRNAs (spec_7d mRNA) were found, and their key genes and regulation networks were analyzed.In summary, we screened the differentially expressed circRNAs, lncRNAs, and mRNAs between the control and model groups and at different reperfusion time (24h, 72h, and 7d). 5 key genes, Cd74, RT1-Da, RT1-CE5, RT1-Bb, RT1-DOa, were selected. Key genes specific to reperfusion time were selected to show the change in biological process with the increased reperfusion time. These results provided theoretical support and a reference basis for the clinical treatment.
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Affiliation(s)
- Kai-Xiong Qing
- Department of Cardiac & Vascular Surgery, First Affiliated Hospital of Kunming Medical University, Kunming Medical University, Kunming, Yunnan Province, China
| | - Amy C Y Lo
- Department of Ophthalmology, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Hong Kong, China
| | - Siduo Lu
- Department of Ophthalmology, First Affiliated Hospital of Kunming Medical University, Kunming Medical University, Kunming, Yunnan Province, China
| | - You Zhou
- Department of Ophthalmology, First Affiliated Hospital of Kunming Medical University, Kunming Medical University, Kunming, Yunnan Province, China
| | - Dan Yang
- Department of Ophthalmology, First Affiliated Hospital of Kunming Medical University, Kunming Medical University, Kunming, Yunnan Province, China
| | - Di Yang
- Department of Ophthalmology, First Affiliated Hospital of Kunming Medical University, Kunming Medical University, Kunming, Yunnan Province, China.
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7
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Liu WL, Wu LT, Wang JL, Sun J, Cheng XR, Zhou ZH, Guan JX, Wang YL, Meng ZY. Effect of PCI on ophthalmic artery hemodynamics in patients with acute coronary syndrome. Front Med (Lausanne) 2024; 11:1367900. [PMID: 38500953 PMCID: PMC10944952 DOI: 10.3389/fmed.2024.1367900] [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: 01/09/2024] [Accepted: 02/19/2024] [Indexed: 03/20/2024] Open
Abstract
Purpose We aimed to explore the effects of percutaneous coronary intervention (PCI) on the ophthalmic artery (OA) hemodynamics in patients with acute coronary syndrome (ACS). Methods A total of 73 participants (Group0: healthy controls, Group1: Patients with ACS underwent PCI < 3 months, Group2: Patients with ACS underwent PCI ≥ 3 months) were enrolled. Computed tomographic angiography images were used to construct three-dimensional models of participants' OAs. Numerical simulations based on computational fluid dynamics were used to acquire hemodynamic parameters. Results The angle between the OA and internal carotid artery in Group2 was significantly larger compared with Group0 and Group1 (P = 0.003 and P = 0.044). Hemodynamic simulation showed a significantly slower OA blood velocity in Group1 than in the control (P < 0.001) and Group2 (P = 0.033). Lower wall shear stress was found in Group1 than that in control (P = 0.040). Patients after PCI had a higher wall pressure than healthy controls (P = 0.012 and P = 0.004). Mass flow ratios were decreased in Group1 and Group2 (P = 0.021 and P = 0.002). The hemodynamic parameters of OA were correlated with several clinical indicators. Conclusions The OA blood flow velocity of patients with ACS after PCI initially slowed down, which increased the risk of plaque formation, and then showed an increasing trend. There was a correlation between OA hemodynamic parameters and clinical indexes related to cardiac stress. Ischemia-reperfusion injury and changes in blood flow status after PCI may affect OA morphology and hemodynamics, leading to ocular lesions. Trial registration ChiCTR2100050428.
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Xuan M, Wang W, Bulloch G, Zhang J, Ha J, Wang Q, Wang J, Lin X, He M. Impact of Acute Ocular Hypertension on Retinal Ganglion Cell Loss in Mice. Transl Vis Sci Technol 2024; 13:17. [PMID: 38506800 PMCID: PMC10959197 DOI: 10.1167/tvst.13.3.17] [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: 05/02/2023] [Accepted: 02/07/2024] [Indexed: 03/21/2024] Open
Abstract
Purpose To assess the correlation between intraocular pressure (IOP) levels and retinal ganglion cell (RGC) loss across different fixed-duration episodes of acute ocular hypertension (AOH). Methods AOH was induced in Thy1-YFP-H transgenic mice by inserting a needle connected to a saline solution container into the anterior chamber. Thirty-one groups were tested, each comprising three to five mice exposed to IOP levels ranging from 50 to 110Â mm Hg in 5/10Â mm Hg increments for 60/90/120Â minutes and a sham control group. The YFP-expressing RGCs were quantified by confocal scanning laser ophthalmoscopy, whereas peripapillary ganglion cell complex thickness was measured using spectral-domain optical coherence tomography. Changes in RGC count and GCCT were determined from values measured 30Â days after AOH relative to baseline (before AOH). Results In the 60-minute AOH groups, RGC loss varied even when IOP was increased up to 110Â mm Hg (36.8%-68.2%). However, for longer durations (90 and 120Â minutes), a narrow range of IOP levels (60-70Â mm Hg for 90-minute duration; 55-65Â mm Hg for 120-minute duration) produced a significant difference in RGC loss, ranging from <25% to >90%. Additionally, loss of YFP-expressing RGCs was comparable to that of total RGCs in the same retinas. Conclusions Reproducible RGC loss during AOH depends on precise durations and IOP thresholds. In the current study, the optimal choice is an AOH protocol set at 70Â mm Hg for a duration of 90Â minutes. Translational Relevance This study can assist in determining the optimal duration and intensity of IOP for the effective utilization of AOH models.
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Affiliation(s)
- Meng Xuan
- State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-Sen University, Guangdong Provincial Key Laboratory of Ophthalmology and Visual Science, Guangzhou, Guangdong, China
| | - Wei Wang
- State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-Sen University, Guangdong Provincial Key Laboratory of Ophthalmology and Visual Science, Guangzhou, Guangdong, China
| | - Gabriella Bulloch
- Centre for Eye Research Australia, Royal Victorian Eye and Ear Hospital, East Melbourne, Victoria, Australia
- Faculty of Science, Medicine and Health, University of Melbourne, Melbourne, Victoria, Australia
| | - Jian Zhang
- State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-Sen University, Guangdong Provincial Key Laboratory of Ophthalmology and Visual Science, Guangzhou, Guangdong, China
| | - Jason Ha
- Centre for Eye Research Australia, Royal Victorian Eye and Ear Hospital, East Melbourne, Victoria, Australia
| | - Qilin Wang
- State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-Sen University, Guangdong Provincial Key Laboratory of Ophthalmology and Visual Science, Guangzhou, Guangdong, China
| | - Juanjuan Wang
- State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-Sen University, Guangdong Provincial Key Laboratory of Ophthalmology and Visual Science, Guangzhou, Guangdong, China
| | - Xingyan Lin
- State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-Sen University, Guangdong Provincial Key Laboratory of Ophthalmology and Visual Science, Guangzhou, Guangdong, China
| | - Mingguang He
- State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-Sen University, Guangdong Provincial Key Laboratory of Ophthalmology and Visual Science, Guangzhou, Guangdong, China
- School of Optometry, The Hong Kong Polytechnic University, Kowloon, Hong Kong, China
- Research Centre for SHARP Vision (RCSV), The Hong Kong Polytechnic University, Kowloon, Hong Kong, China
- Centre for Eye and Vision Research (CEVR), Hong Kong, China
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9
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Tsai T, Reinehr S, Deppe L, Strubbe A, Kluge N, Dick HB, Joachim SC. Glaucoma Animal Models beyond Chronic IOP Increase. Int J Mol Sci 2024; 25:906. [PMID: 38255979 PMCID: PMC10815097 DOI: 10.3390/ijms25020906] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2023] [Revised: 01/04/2024] [Accepted: 01/08/2024] [Indexed: 01/24/2024] Open
Abstract
Glaucoma is a complex and multifactorial disease defined as the loss of retinal ganglion cells (RGCs) and their axons. Besides an elevated intraocular pressure (IOP), other mechanisms play a pivotal role in glaucoma onset and progression. For example, it is known that excitotoxicity, immunological alterations, ischemia, and oxidative stress contribute to the neurodegeneration in glaucoma disease. To study these effects and to discover novel therapeutic approaches, appropriate animal models are needed. In this review, we focus on various glaucoma animal models beyond an elevated IOP. We introduce genetically modified mice, e.g., the optineurin E50K knock-in or the glutamate aspartate transporter (GLAST)-deficient mouse. Excitotoxicity can be mimicked by injecting the glutamate analogue N-methyl-D-aspartate intravitreally, which leads to rapid RGC degeneration. To explore the contribution of the immune system, the experimental autoimmune glaucoma model can serve as a useful tool. Here, immunization with antigens led to glaucoma-like damage. The ischemic mechanism can be mimicked by inducing a high IOP for a certain amount of time in rodents, followed by reperfusion. Thereby, damage to the retina and the optic nerve occurs rapidly after ischemia/reperfusion. Lastly, we discuss the importance of optic nerve crush models as model systems for normal-tension glaucoma. In summary, various glaucoma models beyond IOP increase can be utilized.
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Affiliation(s)
| | | | | | | | | | | | - Stephanie C. Joachim
- Experimental Eye Research Institute, University Eye Hospital, Ruhr-University Bochum, In der Schornau 23-25, 44892 Bochum, Germany; (T.T.); (S.R.); (L.D.); (N.K.); (H.B.D.)
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10
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Liao J, Lai Z, Huang G, Lin J, Huang W, Qin Y, Chen Q, Hu Y, Cheng Q, Jiang L, Cui L, Zhong H, Li M, Wei Y, Xu F. Setanaxib mitigates oxidative damage following retinal ischemia-reperfusion via NOX1 and NOX4 inhibition in retinal ganglion cells. Biomed Pharmacother 2024; 170:116042. [PMID: 38118351 DOI: 10.1016/j.biopha.2023.116042] [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: 10/02/2023] [Revised: 11/28/2023] [Accepted: 12/14/2023] [Indexed: 12/22/2023] Open
Abstract
Glaucoma, a prevalent cause of permanent visual impairment worldwide, is characterized by the progressive degeneration of retinal ganglion cells (RGCs). NADPH oxidase (NOX) 1 and NOX4 are pivotal nodes in various retinal diseases. Setanaxib, a potent and highly selective inhibitor of NOX1 and NOX4, can impede the progression of various diseases. This study investigated the efficacy of setanaxib in ameliorating retinal ischemia-reperfusion (I/R) injury and elucidated its underlying mechanisms. The model of retinal I/R induced by acute intraocular hypertension and the oxygen-glucose deprivation/reoxygenation (OGD/R) model of primary RGCs were established. By suppressing NOX1 and NOX4 expression in RGCs, setanaxib mitigated I/R-induced retinal neuronal loss, structural disruption, and dysfunction. Setanaxib reduced TUNEL-positive cells, upregulated Bcl-2, and inhibited Bax, Bad, and cleaved-caspase-3 overexpression after I/R injury in vitro and in vivo. Moreover, setanaxib also significantly reduced cellular senescence, as demonstrated by downregulating SA-β-gal-positive and p16-INK4a expression. Furthermore, setanaxib significantly suppressed ROS production, Hif-1α and FOXO1 upregulation, and NRF2 downregulation in damaged RGCs. These findings highlight that the setanaxib effectively inhibited NOX1 and NOX4, thereby regulating ROS production and redox signal activation. This inhibition further prevents the activation of apoptosis and senescence related factors in RGCs, ultimately protecting them against retinal I/R injury. Consequently, setanaxib exhibits promising potential as a therapeutic intervention for glaucoma.
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Affiliation(s)
- Jing Liao
- Institute of Ophthalmic Diseases, Guangxi Academy of Medical Sciences & Department of Ophthalmology, the People's Hospital of Guangxi Zhuang Autonomous Region & Guangxi Key Laboratory of Eye Health & Guangxi Health Commission Key Laboratory of Ophthalmology and Related Systemic Diseases Artificial Intelligence Screening Technology, Nanning, 530000 Guangxi, China
| | - Zhaoguang Lai
- Institute of Ophthalmic Diseases, Guangxi Academy of Medical Sciences & Department of Ophthalmology, the People's Hospital of Guangxi Zhuang Autonomous Region & Guangxi Key Laboratory of Eye Health & Guangxi Health Commission Key Laboratory of Ophthalmology and Related Systemic Diseases Artificial Intelligence Screening Technology, Nanning, 530000 Guangxi, China
| | - Guangyi Huang
- Institute of Ophthalmic Diseases, Guangxi Academy of Medical Sciences & Department of Ophthalmology, the People's Hospital of Guangxi Zhuang Autonomous Region & Guangxi Key Laboratory of Eye Health & Guangxi Health Commission Key Laboratory of Ophthalmology and Related Systemic Diseases Artificial Intelligence Screening Technology, Nanning, 530000 Guangxi, China
| | - Jiali Lin
- Institute of Ophthalmic Diseases, Guangxi Academy of Medical Sciences & Department of Ophthalmology, the People's Hospital of Guangxi Zhuang Autonomous Region & Guangxi Key Laboratory of Eye Health & Guangxi Health Commission Key Laboratory of Ophthalmology and Related Systemic Diseases Artificial Intelligence Screening Technology, Nanning, 530000 Guangxi, China
| | - Wei Huang
- Institute of Ophthalmic Diseases, Guangxi Academy of Medical Sciences & Department of Ophthalmology, the People's Hospital of Guangxi Zhuang Autonomous Region & Guangxi Key Laboratory of Eye Health & Guangxi Health Commission Key Laboratory of Ophthalmology and Related Systemic Diseases Artificial Intelligence Screening Technology, Nanning, 530000 Guangxi, China
| | - Yuanjun Qin
- Institute of Ophthalmic Diseases, Guangxi Academy of Medical Sciences & Department of Ophthalmology, the People's Hospital of Guangxi Zhuang Autonomous Region & Guangxi Key Laboratory of Eye Health & Guangxi Health Commission Key Laboratory of Ophthalmology and Related Systemic Diseases Artificial Intelligence Screening Technology, Nanning, 530000 Guangxi, China
| | - Qi Chen
- Institute of Ophthalmic Diseases, Guangxi Academy of Medical Sciences & Department of Ophthalmology, the People's Hospital of Guangxi Zhuang Autonomous Region & Guangxi Key Laboratory of Eye Health & Guangxi Health Commission Key Laboratory of Ophthalmology and Related Systemic Diseases Artificial Intelligence Screening Technology, Nanning, 530000 Guangxi, China
| | - Yaguang Hu
- Department of Ophthalmology, the First Affiliated Hospital of Xi'an Jiaotong University, 277 Yanta West Road, Yanta District, Xi'an, Shaanxi 710061, China
| | - Qiaochu Cheng
- Department of Ophthalmology, the First Affiliated Hospital of Xi'an Jiaotong University, 277 Yanta West Road, Yanta District, Xi'an, Shaanxi 710061, China
| | - Li Jiang
- Institute of Ophthalmic Diseases, Guangxi Academy of Medical Sciences & Department of Ophthalmology, the People's Hospital of Guangxi Zhuang Autonomous Region & Guangxi Key Laboratory of Eye Health & Guangxi Health Commission Key Laboratory of Ophthalmology and Related Systemic Diseases Artificial Intelligence Screening Technology, Nanning, 530000 Guangxi, China
| | - Ling Cui
- Institute of Ophthalmic Diseases, Guangxi Academy of Medical Sciences & Department of Ophthalmology, the People's Hospital of Guangxi Zhuang Autonomous Region & Guangxi Key Laboratory of Eye Health & Guangxi Health Commission Key Laboratory of Ophthalmology and Related Systemic Diseases Artificial Intelligence Screening Technology, Nanning, 530000 Guangxi, China
| | - Haibin Zhong
- Institute of Ophthalmic Diseases, Guangxi Academy of Medical Sciences & Department of Ophthalmology, the People's Hospital of Guangxi Zhuang Autonomous Region & Guangxi Key Laboratory of Eye Health & Guangxi Health Commission Key Laboratory of Ophthalmology and Related Systemic Diseases Artificial Intelligence Screening Technology, Nanning, 530000 Guangxi, China
| | - Min Li
- Institute of Ophthalmic Diseases, Guangxi Academy of Medical Sciences & Department of Ophthalmology, the People's Hospital of Guangxi Zhuang Autonomous Region & Guangxi Key Laboratory of Eye Health & Guangxi Health Commission Key Laboratory of Ophthalmology and Related Systemic Diseases Artificial Intelligence Screening Technology, Nanning, 530000 Guangxi, China.
| | - Yantao Wei
- State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University, Guangdong Provincial Key Laboratory of Ophthalmology and Visual Science, 7 Jinsui Road, Guangzhou 510060, China.
| | - Fan Xu
- Institute of Ophthalmic Diseases, Guangxi Academy of Medical Sciences & Department of Ophthalmology, the People's Hospital of Guangxi Zhuang Autonomous Region & Guangxi Key Laboratory of Eye Health & Guangxi Health Commission Key Laboratory of Ophthalmology and Related Systemic Diseases Artificial Intelligence Screening Technology, Nanning, 530000 Guangxi, China.
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11
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Sun MH, Ho TC, Yeh SI, Chen SL, Tsao YP. Short peptides derived from pigment epithelium-derived factor attenuate retinal ischemia reperfusion injury through inhibition of apoptosis and inflammatory response in rats. Exp Eye Res 2024; 238:109743. [PMID: 38056550 DOI: 10.1016/j.exer.2023.109743] [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: 09/18/2023] [Revised: 11/21/2023] [Accepted: 11/27/2023] [Indexed: 12/08/2023]
Abstract
Pigment epithelium-derived factor (PEDF) is widely recognized as a neuroprotective factor expressed in the retina and has shown therapeutic potential in several retinal diseases. Our study aimed to identify the neuroprotective fragment in PEDF and investigate its protective activity in retinas under ischemia-reperfusion (IR) condition. We synthesized a series of shorter synthetic peptides, 6-mer (Ser93-Gln98) and its d-form variant (6Â dS) derived from the 44-mer (Val78-Thr121; a PEDF neurotrophic fragment), to determine their cytoprotective activity in IR injury, which was induced in rat retinas by injection of saline into the anterior chamber to increase the intraocular pressure (IOP) followed by reperfusion. We found the cytoprotective effect of 6-mer on glutamate-treated Neuro-2a cells and tert-butyl hydroperoxide (tBHP)-treated 661W cells were 2.6-fold and 1.5-fold higher than the 44-mer, respectively. The cytoprotective effect was blocked by a chemical inhibitor atglistatin and blocking antibody targeting PEDF receptor (PEDF-R). IR induced several impairments in retina, including cell apoptosis, activation of microglia/macroglia, degeneration of retinal capillaries, reduction in electroretinography (ERG) amplitudes, and retinal atrophy. Such IR injuries were ameliorated by treatment with 6-mer and 6Â dS eye drops. Also, the neuroprotective activity of 6-mer and 6Â dS in ischemic retinas were dramatically reversed by atglistatin preconditioning. Taken together, our data demonstrate smallest neuroprotective fragment of PEDF has potential to treat retinal degeneration-related diseases.
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Affiliation(s)
- Ming-Hui Sun
- Department of Ophthalmology, Linkou Chang Gung Memorial Hospital, Taoyuan, Taiwan; College of Medicine, Chang Gung University, Taoyuan, Taiwan
| | - Tsung-Chuan Ho
- Department of Medical Research, Mackay Memorial Hospital, New Taipei City, Taiwan
| | - Shu-I Yeh
- Department of Medicine, Mackay Medical College, New Taipei City, Taiwan; Department of Ophthalmology, Mackay Memorial Hospital, Taipei, Taiwan
| | - Show-Li Chen
- Graduate Institute of Microbiology, College of Medicine, National Taiwan University, Taipei, Taiwan
| | - Yeou-Ping Tsao
- Department of Medical Research, Mackay Memorial Hospital, New Taipei City, Taiwan; Department of Medicine, Mackay Medical College, New Taipei City, Taiwan; Department of Ophthalmology, Mackay Memorial Hospital, Taipei, Taiwan.
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12
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Yang Z, Liu Y, Chen X, Huang S, Li Y, Ye G, Cao X, Su W, Zhuo Y. Empagliflozin targets Mfn1 and Opa1 to attenuate microglia-mediated neuroinflammation in retinal ischemia and reperfusion injury. J Neuroinflammation 2023; 20:296. [PMID: 38082266 PMCID: PMC10714482 DOI: 10.1186/s12974-023-02982-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2023] [Accepted: 12/01/2023] [Indexed: 12/18/2023] Open
Abstract
BACKGROUND Neuroinflammation and mitochondrial dysfunction play crucial roles in retinal ischemia and reperfusion (IR) injury. Recent studies have identified mitochondrial function as a promising target for immunomodulation. Empagliflozin (EMPA), an anti-diabetic drug, has exhibited great potential as both an anti-inflammatory agent and a protector of mitochondrial health. This study aimed to assess the therapeutic efficacy of EMPA in retinal IR injury. METHODS To evaluate the protective effects of EMPA, the drug was injected into the vitreous body of mice post-retinal IR. Single-cell RNA sequencing (scRNA-seq) analysis was conducted to uncover the underlying mechanisms, and the results were further validated through in vivo and in vitro experiments. RESULTS EMPA effectively protected retinal ganglion cells (RGCs) from IR injury by attenuating local retinal inflammation. The scRNA-seq analysis revealed that EMPA downregulated the nucleotide-binding domain and leucine-rich repeat containing protein 3 (NLRP3) signaling pathway and restored mitochondrial dynamics by upregulating the expression of mitochondrial fusion-related genes, Mitofusin 1 (Mfn1) and optic atrophy 1 (Opa1). These findings were further corroborated by Western blotting. In vitro experiments provided additional insights, demonstrating that EMPA suppressed lipopolysaccharide (LPS)-induced cell inflammation and NLRP3 inflammasome activation. Moreover, EMPA enhanced mitochondrial fusion, neutralized mitochondrial reactive oxygen species (mtROS), and restored mitochondrial membrane potential (MMP) in BV2 microglia. Notably, genetic ablation of Mfn1 or Opa1 abolished the anti-inflammatory effects of EMPA. CONCLUSIONS Our findings highlight the positive contribution of Mfn1 and Opa1 to the anti-inflammatory therapeutic effect of EMPA. By restoring mitochondrial dynamics, EMPA effectively mitigates microglia-mediated neuroinflammation and prevents RGC loss in retinal IR injury.
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Affiliation(s)
- Zhenlan Yang
- State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-Sen University, Guangdong Provincial Key Laboratory of Ophthalmology and Visual Science, Guangzhou, 510060, China
| | - Yidan 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
| | - Xuhao 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
| | - Shaofen Huang
- State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-Sen University, Guangdong Provincial Key Laboratory of Ophthalmology and Visual Science, Guangzhou, 510060, China
| | - Yangyang 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
| | - Guitong Ye
- State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-Sen University, Guangdong Provincial Key Laboratory of Ophthalmology and Visual Science, Guangzhou, 510060, China
| | - Xu Cao
- State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-Sen University, Guangdong Provincial Key Laboratory of Ophthalmology and Visual Science, Guangzhou, 510060, China
| | - Wenru 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.
| | - Yehong Zhuo
- State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-Sen University, Guangdong Provincial Key Laboratory of Ophthalmology and Visual Science, Guangzhou, 510060, China.
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13
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MartÃnez-Gil N, Kutsyr O, Fernández-Sánchez L, Sánchez-Sáez X, Albertos-Arranz H, Sánchez-Castillo C, Vidal-Gil L, Cuenca N, Lax P, Maneu V. Ischemia-Reperfusion Increases TRPM7 Expression in Mouse Retinas. Int J Mol Sci 2023; 24:16068. [PMID: 38003256 PMCID: PMC10671235 DOI: 10.3390/ijms242216068] [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: 10/09/2023] [Revised: 11/01/2023] [Accepted: 11/06/2023] [Indexed: 11/26/2023] Open
Abstract
Ischemia is the main cause of cell death in retinal diseases such as vascular occlusions, diabetic retinopathy, glaucoma, or retinopathy of prematurity. Although excitotoxicity is considered the primary mechanism of cell death during an ischemic event, antagonists of glutamatergic receptors have been unsuccessful in clinical trials with patients suffering ischemia or stroke. Our main purpose was to analyze if the transient receptor potential channel 7 (TRPM7) could contribute to retinal dysfunction in retinal pathologies associated with ischemia. By using an experimental model of acute retinal ischemia, we analyzed the changes in retinal function by electroretinography and the changes in retinal morphology by optical coherence tomography (OCT) and OCT-angiography (OCTA). Immunohistochemistry was performed to assess the pattern of TRPM7 and its expression level in the retina. Our results show that ischemia elicited a decrease in retinal responsiveness to light stimuli along with reactive gliosis and a significant increase in the expression of TRPM7 in Müller cells. TRPM7 could emerge as a new drug target to be explored in retinal pathologies associated with ischemia.
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Affiliation(s)
- Natalia MartÃnez-Gil
- Departamento de FisiologÃa, Genética y MicrobiologÃa, Universidad de Alicante, 03690 San Vicente del Raspeig, Alicante, Spain; (N.M.-G.); (X.S.-S.); (H.A.-A.); (C.S.-C.); (L.V.-G.); (N.C.); (P.L.)
| | - Oksana Kutsyr
- Departamento de Óptica, FarmacologÃa y AnatomÃa, Universidad de Alicante, 03690 San Vicente del Raspeig, Alicante, Spain; (O.K.); (L.F.-S.)
| | - Laura Fernández-Sánchez
- Departamento de Óptica, FarmacologÃa y AnatomÃa, Universidad de Alicante, 03690 San Vicente del Raspeig, Alicante, Spain; (O.K.); (L.F.-S.)
| | - Xavier Sánchez-Sáez
- Departamento de FisiologÃa, Genética y MicrobiologÃa, Universidad de Alicante, 03690 San Vicente del Raspeig, Alicante, Spain; (N.M.-G.); (X.S.-S.); (H.A.-A.); (C.S.-C.); (L.V.-G.); (N.C.); (P.L.)
| | - Henar Albertos-Arranz
- Departamento de FisiologÃa, Genética y MicrobiologÃa, Universidad de Alicante, 03690 San Vicente del Raspeig, Alicante, Spain; (N.M.-G.); (X.S.-S.); (H.A.-A.); (C.S.-C.); (L.V.-G.); (N.C.); (P.L.)
| | - Carla Sánchez-Castillo
- Departamento de FisiologÃa, Genética y MicrobiologÃa, Universidad de Alicante, 03690 San Vicente del Raspeig, Alicante, Spain; (N.M.-G.); (X.S.-S.); (H.A.-A.); (C.S.-C.); (L.V.-G.); (N.C.); (P.L.)
| | - Lorena Vidal-Gil
- Departamento de FisiologÃa, Genética y MicrobiologÃa, Universidad de Alicante, 03690 San Vicente del Raspeig, Alicante, Spain; (N.M.-G.); (X.S.-S.); (H.A.-A.); (C.S.-C.); (L.V.-G.); (N.C.); (P.L.)
| | - Nicolás Cuenca
- Departamento de FisiologÃa, Genética y MicrobiologÃa, Universidad de Alicante, 03690 San Vicente del Raspeig, Alicante, Spain; (N.M.-G.); (X.S.-S.); (H.A.-A.); (C.S.-C.); (L.V.-G.); (N.C.); (P.L.)
| | - Pedro Lax
- Departamento de FisiologÃa, Genética y MicrobiologÃa, Universidad de Alicante, 03690 San Vicente del Raspeig, Alicante, Spain; (N.M.-G.); (X.S.-S.); (H.A.-A.); (C.S.-C.); (L.V.-G.); (N.C.); (P.L.)
| | - Victoria Maneu
- Departamento de Óptica, FarmacologÃa y AnatomÃa, Universidad de Alicante, 03690 San Vicente del Raspeig, Alicante, Spain; (O.K.); (L.F.-S.)
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14
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Zhang K, Wang T, Sun GF, Xiao JX, Jiang LP, Tou FF, Qu XH, Han XJ. Metformin protects against retinal ischemia/reperfusion injury through AMPK-mediated mitochondrial fusion. Free Radic Biol Med 2023; 205:47-61. [PMID: 37253410 DOI: 10.1016/j.freeradbiomed.2023.05.019] [Citation(s) in RCA: 11] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/26/2023] [Revised: 05/07/2023] [Accepted: 05/16/2023] [Indexed: 06/01/2023]
Abstract
Retinal ischemia/reperfusion (I/R) injury is a common pathological process responsible for cellular damage in glaucoma, diabetic retinopathy and hypertensive retinopathy. Metformin is a biguanide drug that exerts strong effects on multiple diseases. This study aims to evaluate the protective effect of metformin against retinal I/R injury and its underlying mechanism. I/R induced reduction in retina thickness and cell number in ganglion cell layer, and metformin alleviated I/R-induced retinal injury. Both retinal I/R and simulated ischemia/reperfusion (SIR) in R28Â cells down-regulated expression of mitochondrial fusion protein Mfn2 and OPA1, which led to mitochondrial fission. Metformin also alleviated damage in R28Â cells, and reversed the alteration in Mfn2 and OPA1, mitochondrial fission and mitochondrial membrane potential (MMP) disruption-induced by I/R or SIR as well. Intriguingly, inhibition of AMPK by compound C or siRNA prevented metformin-mediated up-regulation of Mfn2 and OPA1. Compound C and knockdown of Mfn2 or OPA1 dramatically alleviated the protective effect of metformin against intracellular ROS generation, MMP disruption, mitochondrial fission and loss of RGCs in ganglion cell layer induced by SIR or I/R. Moreover, scavenging mitochondrial ROS (mito-ROS) by mito-TEMPO exerted the similar protection against I/R-induced retinal injury or SIR-induced damage in R28Â cells as metformin. Our data show for the first time that metformin protects against retinal I/R injury through AMPK-mediated mitochondrial fusion and the decreased mito-ROS generation. These findings might also repurpose metformin as a therapeutic agent for retinal I/R injury.
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Affiliation(s)
- Kun Zhang
- Institute of Geriatrics, Jiangxi Provincial People's Hospital & the First Affiliated Hospital of Nanchang Medical College, Nanchang, Jiangxi, 330006, PR China; Research Institute of Ophthalmology and Visual Sciences, Affiliated Eye Hospital of Nanchang University, Nanchang, Jiangxi, 330006, PR China; Department of Ophthalmology, Shenzhen People's Hospital & the Second Clinical Medical College of Jinan University, Shenzhen, Guangdong, 518020, PR China
| | - Tao Wang
- Institute of Geriatrics, Jiangxi Provincial People's Hospital & the First Affiliated Hospital of Nanchang Medical College, Nanchang, Jiangxi, 330006, PR China
| | - Gui-Feng Sun
- Department of Pharmacology, School of Pharmaceutical Science, Nanchang University, Nanchang, Jiangxi, 330006, PR China
| | - Jin-Xing Xiao
- Department of Pharmacology, School of Pharmaceutical Science, Nanchang University, Nanchang, Jiangxi, 330006, PR China
| | - Li-Ping Jiang
- Department of Pharmacology, School of Pharmaceutical Science, Nanchang University, Nanchang, Jiangxi, 330006, PR China
| | - Fang-Fang Tou
- Institute of Geriatrics, Jiangxi Provincial People's Hospital & the First Affiliated Hospital of Nanchang Medical College, Nanchang, Jiangxi, 330006, PR China
| | - Xin-Hui Qu
- Institute of Geriatrics, Jiangxi Provincial People's Hospital & the First Affiliated Hospital of Nanchang Medical College, Nanchang, Jiangxi, 330006, PR China; The Second Department of Neurology, Jiangxi Provincial People's Hospital & the First Affiliated Hospital of Nanchang Medical College, Nanchang, Jiangxi, 330006, PR China.
| | - Xiao-Jian Han
- Institute of Geriatrics, Jiangxi Provincial People's Hospital & the First Affiliated Hospital of Nanchang Medical College, Nanchang, Jiangxi, 330006, PR China; Research Institute of Ophthalmology and Visual Sciences, Affiliated Eye Hospital of Nanchang University, Nanchang, Jiangxi, 330006, PR China; The Second Department of Neurology, Jiangxi Provincial People's Hospital & the First Affiliated Hospital of Nanchang Medical College, Nanchang, Jiangxi, 330006, PR China.
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15
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Gong L, Pasquale LR, Wiggs JL, Pan L, Yang Z, Wu M, Zeng Z, Yang Z, Shen Y, Chen DF, Zeng W. Description of a Nonhuman Primate Model of Retinal Ischemia/Reperfusion Injury. Transl Vis Sci Technol 2023; 12:14. [PMID: 38752575 PMCID: PMC10289273 DOI: 10.1167/tvst.12.6.14] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2023] [Accepted: 05/29/2023] [Indexed: 05/19/2024] Open
Abstract
Purpose To establish an inducible model of retinal ischemia/reperfusion injury (RI/RI) in nonhuman primates (NHPs) to improve our understanding of the disease conditions and evaluate treatment interventions in humans. Methods We cannulated the right eye of rhesus macaques with a needle attached to a normal saline solution reservoir at up to 1.9 m above the eye level that resulted in high intraocular pressure of over 100 mm Hg for 90 minutes. Retinal morphology and function were monitored before and after RI/RI over two months by fundus photography, optical coherence tomography, electroretinography, and visual evoked potential. Terminal experiments involved immunostaining for retinal ganglion cell marker Brn3a, glial fibrillary acidic protein, and quantitative polymerase chain reaction to assess retinal inflammatory biomarkers. Results We observed significant and progressive declines in retinal and retinal nerve fiber layer thickness in the affected eye after RI/RI. We noted significant reductions in amplitudes of electroretinography a-wave, b-wave, and visual evoked potential N2-P2, with minimal recovery at 63 days after injury. Terminal experiments conducted two months after injury revealed ∼73% loss of retinal ganglion cells and a fivefold increase in glial fibrillary acid protein immunofluorescence intensity compared to the uninjured eyes. We observed marked increases in tumor necrosis factor-alpha, interferon-gamma, interleukin-1beta, and inducible nitric oxide synthase in the injured retinas. Conclusions The results demonstrated that the pathophysiology observed in the NHP model of RI/RI is comparable to that of human diseases and suggest that the NHP model may serve as a valuable tool for translating interventions into viable treatment approaches. Translational Relevance The model serves as a useful platform to study potential interventions and treatments for RI/RI or blinding retinal diseases.
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Affiliation(s)
- Li Gong
- PriMed Non-human Primate Research Center of Sichuan PriMed Shines Bio-tech Co., Ltd., Ya'an, Sichuan Province, China
| | - Louis R. Pasquale
- Eye and Vision Research Institute at New York Eye and Ear Infirmary of Mount Sinai, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - Janey L. Wiggs
- Massachusetts Eye and Ear, Department of Ophthalmology, Harvard Medical School, Boston, MA, USA
| | - Lingzhen Pan
- PriMed Non-human Primate Research Center of Sichuan PriMed Shines Bio-tech Co., Ltd., Ya'an, Sichuan Province, China
| | - Zhenyan Yang
- PriMed Non-human Primate Research Center of Sichuan PriMed Shines Bio-tech Co., Ltd., Ya'an, Sichuan Province, China
| | - Mingling Wu
- PriMed Non-human Primate Research Center of Sichuan PriMed Shines Bio-tech Co., Ltd., Ya'an, Sichuan Province, China
| | - Zirui Zeng
- PriMed Non-human Primate Research Center of Sichuan PriMed Shines Bio-tech Co., Ltd., Ya'an, Sichuan Province, China
| | - Zunyuan Yang
- PriMed Non-human Primate Research Center of Sichuan PriMed Shines Bio-tech Co., Ltd., Ya'an, Sichuan Province, China
| | - Yubo Shen
- PriMed Non-human Primate Research Center of Sichuan PriMed Shines Bio-tech Co., Ltd., Ya'an, Sichuan Province, China
| | - Dong Feng Chen
- Schepens Eye Research Institute of Massachusetts Eye and Ear, Department of Ophthalmology, Harvard Medical School, Boston, MA, USA
| | - Wen Zeng
- PriMed Non-human Primate Research Center of Sichuan PriMed Shines Bio-tech Co., Ltd., Ya'an, Sichuan Province, China
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16
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Zhang F, Lin B, Huang S, Wu P, Zhou M, Zhao J, Hei X, Ke Y, Zhang Y, Huang D. Melatonin Alleviates Retinal Ischemia-Reperfusion Injury by Inhibiting p53-Mediated Ferroptosis. Antioxidants (Basel) 2023; 12:1173. [PMID: 37371903 DOI: 10.3390/antiox12061173] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2023] [Revised: 04/24/2023] [Accepted: 05/17/2023] [Indexed: 06/29/2023] Open
Abstract
Retinal ischemia-reperfusion (RIR) injury caused by high intraocular pressure (IOP) is an important risk factor contributing to retinal ganglion cell (RGC) death, eventually causing blindness. A key progressive pathological process in the development of RIR is the death of RGCs. However, the detailed mechanisms underlying RGC death caused by RIR have not yet been clearly elucidated, and effective treatments are lacking. Ferroptosis is a recently defined form of programmed cell death that is closely related to organ injury. Melatonin (MT) is a promising neuroprotective agent, but its effects on RIR injury remain unclear. In this study, murine models of acute ocular hypertension and oxygen and glucose deprivation/reoxygenation (OGD/R) model were adopted to simulate retinal ischemia. MT alleviated retinal damage and RGC death in RIR mice, significantly attenuating RIR-induced ferroptosis. Furthermore, MT reduced the expression of p53, a master regulator of ferroptosis pathways, and the upregulation of p53 promoted ferroptosis and largely abolished the neuroprotective effects of MT. Mechanistically, the overexpression (OE) of p53 suppressed the expression of the solute carrier family 7 member 11 (Slc7a11), which was accompanied by increased 12-lipoxygenase (Alox12) expression, triggering retinal ferroptosis. Moreover, MT-ameliorated apoptosis, neuroinflammation and microglial activation were observed. In summary, MT conferred neuroprotection against RIR injury by inhibiting p53-mediated ferroptosis. These findings indicate that MT is a retina-specific ferroptosis inhibitor and a promising therapeutic agent for retinal neuroprotection.
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Affiliation(s)
- Fan Zhang
- State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University, Guangzhou 510060, China
| | - Bingying Lin
- State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University, Guangzhou 510060, China
| | - Siyu Huang
- State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University, Guangzhou 510060, China
| | - Pengsen Wu
- State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University, Guangzhou 510060, China
| | - Min Zhou
- State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University, Guangzhou 510060, China
| | - Jing Zhao
- State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University, Guangzhou 510060, China
| | - Xiangqing Hei
- State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University, Guangzhou 510060, China
| | - Yu Ke
- State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University, Guangzhou 510060, China
| | - Yiting Zhang
- State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University, Guangzhou 510060, China
| | - Danping Huang
- State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University, Guangzhou 510060, China
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17
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Meng Z, You R, Mahmood A, Yan F, Wang Y. Application of Proteomics Analysis and Animal Models in Optic Nerve Injury Diseases. Brain Sci 2023; 13:brainsci13030404. [PMID: 36979214 PMCID: PMC10046207 DOI: 10.3390/brainsci13030404] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2023] [Revised: 02/08/2023] [Accepted: 02/14/2023] [Indexed: 03/03/2023] Open
Abstract
Optic nerve damage is a common cause of blindness. Optic nerve injury is often accompanied by fundus vascular disease, retinal ganglion cell apoptosis, and changes in retinal thickness. These changes can cause alterations in protein expression within neurons in the retina. Proteomics analysis offers conclusive evidence to decode a biological system. Furthermore, animal models of optic nerve injury made it possible to gain insight into pathological mechanisms, therapeutic targets, and effective treatment of such injuries. Proteomics takes the proteome as the research object and studies protein changes in cells and tissues. At present, a variety of proteomic analysis methods have been widely used in the research of optic nerve injury diseases. This review summarizes the application of proteomic research in optic nerve injury diseases and animal models of optic nerve injury. Additionally, differentially expressed proteins are summarized and analyzed. Various optic nerve injuries, including those associated with different etiologies, are discussed along with their potential therapeutic targets and future directions.
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Affiliation(s)
- Zhaoyang Meng
- Department of Ophthalmology, Beijing Friendship Hospital, Capital Medical University, Beijing 100050, China
| | - Ran You
- Department of Ophthalmology, Beijing Friendship Hospital, Capital Medical University, Beijing 100050, China
| | - Arif Mahmood
- Center for Medical Genetics and Hunan Key Laboratory of Medical Genetics, School of Life Sciences, Central South University, Changsha 410078, China
| | - Fancheng Yan
- Department of Ophthalmology, Beijing Friendship Hospital, Capital Medical University, Beijing 100050, China
- Correspondence: (F.Y.); (Y.W.)
| | - Yanling Wang
- Department of Ophthalmology, Beijing Friendship Hospital, Capital Medical University, Beijing 100050, China
- Correspondence: (F.Y.); (Y.W.)
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18
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Feng Y, Lu J, Peng X, Ge Y, Zhang R, Li H. Long noncoding RNA uc007nnj.1 mediates neuronal death induced by retinal ischemia/reperfusion in mice via the miR-155-5p/Tle4 axis. Mol Med 2023; 29:9. [PMID: 36653745 PMCID: PMC9850566 DOI: 10.1186/s10020-022-00591-5] [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: 03/10/2022] [Accepted: 12/13/2022] [Indexed: 01/19/2023] Open
Abstract
BACKGROUND Retinal ganglion cells (RGCs) apoptosis is a vital manifestation of retinal ischemia/reperfusion (I/R) injury, yet the underlying mechanisms are not well understood. The contribution of long noncoding RNAs (lncRNAs) to this cellular process is currently being explored. Based on a lncRNA chip assay, we aimed to investigate the role of lncRNA uc007nnj.1 in the pathological process of ischemia-induced RGCs apoptosis. METHODS Hank's balanced salt solution containing 10 µM antimycin A and 2 µM calcium ionophore for 2 h to construct an ischemic model in RGCs, and elevation of intraocular pressure to 120 mm Hg for 1 h was used to construct a mouse model of retinal I/R injury. RESULTS In this study, lncRNA uc007nnj.1 was highly upregulated in response to I/R injury in RGCs and mouse retinas. In addition, lncRNA uc007nnj.1 knockdown reduced retinal neuronal cell apoptosis in vitro and in vivo and significantly improved retinal function. DISCUSSION Mechanistically, the results demonstrated that lncRNA uc007nnj.1 acts as ceRNA competitively binding miR-155-5p, thereby enhancing the expression levels of Tle4, thus aggravating ischemia-related apoptosis in RGCs. CONCLUSIONS Finally, our study identifies the lncRNA uc007nnj.1/miR-155-5p/Tle4 axis as a potential target for the prevention of I/R-induced retinal neuronal death.
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Affiliation(s)
- Yuqing Feng
- grid.452708.c0000 0004 1803 0208Department of Ophthalmology, The Second Xiangya Hospital, Central South University, Changsha, 410011 Hunan China ,grid.452708.c0000 0004 1803 0208Hunan Clinical Research Center of Ophthalmic Disease, Changsha, 410011 Hunan China
| | - Jinfang Lu
- grid.452708.c0000 0004 1803 0208Department of Ophthalmology, The Second Xiangya Hospital, Central South University, Changsha, 410011 Hunan China ,grid.452708.c0000 0004 1803 0208Hunan Clinical Research Center of Ophthalmic Disease, Changsha, 410011 Hunan China
| | - Xujun Peng
- grid.452708.c0000 0004 1803 0208Department of Ophthalmology, The Second Xiangya Hospital, Central South University, Changsha, 410011 Hunan China ,grid.452708.c0000 0004 1803 0208Hunan Clinical Research Center of Ophthalmic Disease, Changsha, 410011 Hunan China
| | - Yanni Ge
- grid.452708.c0000 0004 1803 0208Department of Ophthalmology, The Second Xiangya Hospital, Central South University, Changsha, 410011 Hunan China ,grid.452708.c0000 0004 1803 0208Hunan Clinical Research Center of Ophthalmic Disease, Changsha, 410011 Hunan China
| | - Ran Zhang
- grid.452708.c0000 0004 1803 0208Department of Ophthalmology, The Second Xiangya Hospital, Central South University, Changsha, 410011 Hunan China ,grid.452708.c0000 0004 1803 0208Hunan Clinical Research Center of Ophthalmic Disease, Changsha, 410011 Hunan China
| | - Huiling Li
- grid.452708.c0000 0004 1803 0208Department of Ophthalmology, The Second Xiangya Hospital, Central South University, Changsha, 410011 Hunan China ,grid.452708.c0000 0004 1803 0208Hunan Clinical Research Center of Ophthalmic Disease, Changsha, 410011 Hunan China
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19
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Ye D, Xu Y, Shi Y, Fan M, Lu P, Bai X, Feng Y, Hu C, Cui K, Tang X, Liao J, Huang W, Xu F, Liang X, Huang J. Anti-PANoptosis is involved in neuroprotective effects of melatonin in acute ocular hypertension model. J Pineal Res 2022; 73:e12828. [PMID: 36031799 DOI: 10.1111/jpi.12828] [Citation(s) in RCA: 26] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/06/2022] [Revised: 08/12/2022] [Accepted: 08/24/2022] [Indexed: 11/29/2022]
Abstract
Acute ocular hypertension (AOH) is the most important characteristic of acute glaucoma, which can lead to retinal ganglion cell (RGC) death and permanent vision loss. So far, approved effective therapy is still lacking in acute glaucoma. PANoptosis (pyroptosis, apoptosis, and necroptosis), which consists of three key modes of programmed cell death-apoptosis, necroptosis, and pyroptosis-may contribute to AOH-induced RGC death. Previous studies have demonstrated that melatonin (N-acetyl-5-methoxytryptamine) exerts a neuroprotective effect in many retinal degenerative diseases. However, whether melatonin is anti-PANoptotic and neuroprotective in the progression of acute glaucoma remains unclear. Thus, this study aimed to explore the role of melatonin in AOH retinas and its underlying mechanisms. The results showed that melatonin treatment attenuated the loss of ganglion cell complex thickness, retinal nerve fiber layer thickness, and RGC after AOH injury, and improved the amplitudes of a-wave, b-wave, and oscillatory potentials in the electroretinogram. Additionally, the number of terminal deoxynucleotidyl transferase dUTP nick-end labeling-positive cells was decreased, and the upregulation of cleaved caspase-8, cleaved caspase-3, Bax, and Bad and downregulation of Bcl-2 and p-Bad were inhibited after melatonin administration. Meanwhile, both the expression and activation of MLKL, RIP1, and RIP3, along with the number of PI-positive cells, were reduced in melatonin-treated mice, and p-RIP3 was in both RGC and microglia/macrophage after AOH injury. Furthermore, melatonin reduced the expression of NLRP3, ASC, cleaved caspase-1, gasdermin D (GSDMD), and cleaved GSDMD, and decreased the number of Iba1/interleukin-1β-positive cells. In conclusion, melatonin ameliorated retinal structure, prevented retinal dysfunction after AOH, and exerted a neuroprotective effect via inhibition of PANoptosis in AOH retinas.
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Affiliation(s)
- Dan Ye
- State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University, Guangdong Provincial Key Laboratory of Ophthalmology and Visual Science, Guangzhou, China
| | - Yue Xu
- State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University, Guangdong Provincial Key Laboratory of Ophthalmology and Visual Science, Guangzhou, China
| | - Yuxun Shi
- State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University, Guangdong Provincial Key Laboratory of Ophthalmology and Visual Science, Guangzhou, China
| | - Matthew Fan
- Yale College, Yale University, New Haven, Connecticut, USA
| | - Peng Lu
- State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University, Guangdong Provincial Key Laboratory of Ophthalmology and Visual Science, Guangzhou, China
| | - Xue Bai
- State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University, Guangdong Provincial Key Laboratory of Ophthalmology and Visual Science, Guangzhou, China
| | - Yanlin Feng
- State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University, Guangdong Provincial Key Laboratory of Ophthalmology and Visual Science, Guangzhou, China
| | - Chenyang Hu
- State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University, Guangdong Provincial Key Laboratory of Ophthalmology and Visual Science, Guangzhou, China
| | - Kaixuan Cui
- State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University, Guangdong Provincial Key Laboratory of Ophthalmology and Visual Science, Guangzhou, China
| | - Xiaoyu Tang
- State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University, Guangdong Provincial Key Laboratory of Ophthalmology and Visual Science, Guangzhou, China
| | - Jing Liao
- Institute of Ophthalmic Diseases, Guangxi Academy of Medical Sciences & Department of Ophthalmology, the People's Hospital of Guangxi Zhuang Autonomous Region & Guangxi Health Commission Key Laboratory of Ophthalmology and Related Systemic Diseases Artificial Intelligence Screening Technology, Nanning, China
| | - Wei Huang
- Institute of Ophthalmic Diseases, Guangxi Academy of Medical Sciences & Department of Ophthalmology, the People's Hospital of Guangxi Zhuang Autonomous Region & Guangxi Health Commission Key Laboratory of Ophthalmology and Related Systemic Diseases Artificial Intelligence Screening Technology, Nanning, China
| | - Fan Xu
- Institute of Ophthalmic Diseases, Guangxi Academy of Medical Sciences & Department of Ophthalmology, the People's Hospital of Guangxi Zhuang Autonomous Region & Guangxi Health Commission Key Laboratory of Ophthalmology and Related Systemic Diseases Artificial Intelligence Screening Technology, Nanning, China
| | - Xiaoling Liang
- State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University, Guangdong Provincial Key Laboratory of Ophthalmology and Visual Science, Guangzhou, China
| | - Jingjing Huang
- State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University, Guangdong Provincial Key Laboratory of Ophthalmology and Visual Science, Guangzhou, China
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20
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Li Y, Wen Y, Liu X, Li Z, Lin B, Deng C, Yu Z, Zhu Y, Zhao L, Su W, Zhuo Y. Single-cell RNA sequencing reveals a landscape and targeted treatment of ferroptosis in retinal ischemia/reperfusion injury. J Neuroinflammation 2022; 19:261. [PMID: 36289494 PMCID: PMC9597965 DOI: 10.1186/s12974-022-02621-9] [Citation(s) in RCA: 14] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2022] [Accepted: 10/09/2022] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND The aim of this study was to establish a complete retinal cell atlas of ischemia-reperfusion injury by single-cell RNA sequencing, and to explore the underlying mechanism of retinal ischemia-reperfusion injury in mice. METHODS Single-cell RNA sequencing was used to evaluate changes in the mouse retinal ischemia reperfusion model. In vivo and in vitro experiments were performed to verify the protective effect of inhibiting ferroptosis in retinal ischemia-reperfusion injury. RESULTS After ischemia-reperfusion injury, retinal cells were significantly reduced, accompanied by the activation of myeloid and a large amount of blood-derived immune cell infiltration. The IFNG, MAPK and NFKB signaling pathways in retinal neuronal cells, together with the TNF signaling pathway in myeloid give rise to a strong inflammatory response in the I/R state. Besides, the expression of genes implicating iron metabolism, oxidative stress and multiple programed cell death pathways have changed in cell subtypes described above. Especially the ferroptosis-related genes and blocking this process could apparently alleviate the inflammatory immune responses and enhance retinal ganglion cells survival. CONCLUSIONS We established a comprehensive landscape of mouse retinal ischemia-reperfusion injury at the single-cell level, revealing the important role of ferroptosis during this injury, and targeted inhibition of ferroptosis can effectively protect retinal structure and function.
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Affiliation(s)
- Yangyang Li
- grid.12981.330000 0001 2360 039XState Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-Sen University, Guangdong Provincial Key Laboratory of Ophthalmology and Visual Science, Guangzhou, 510060 China
| | - Yuwen Wen
- grid.12981.330000 0001 2360 039XState Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-Sen University, Guangdong Provincial Key Laboratory of Ophthalmology and Visual Science, Guangzhou, 510060 China
| | - Xiuxing Liu
- grid.12981.330000 0001 2360 039XState Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-Sen University, Guangdong Provincial Key Laboratory of Ophthalmology and Visual Science, Guangzhou, 510060 China
| | - Zhuang Li
- grid.12981.330000 0001 2360 039XState Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-Sen University, Guangdong Provincial Key Laboratory of Ophthalmology and Visual Science, Guangzhou, 510060 China
| | - Bingying Lin
- grid.12981.330000 0001 2360 039XState Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-Sen University, Guangdong Provincial Key Laboratory of Ophthalmology and Visual Science, Guangzhou, 510060 China
| | - Caibin Deng
- grid.12981.330000 0001 2360 039XState Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-Sen University, Guangdong Provincial Key Laboratory of Ophthalmology and Visual Science, Guangzhou, 510060 China
| | - Ziyu Yu
- grid.12981.330000 0001 2360 039XState Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-Sen University, Guangdong Provincial Key Laboratory of Ophthalmology and Visual Science, Guangzhou, 510060 China
| | - Yingting Zhu
- grid.12981.330000 0001 2360 039XState Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-Sen University, Guangdong Provincial Key Laboratory of Ophthalmology and Visual Science, Guangzhou, 510060 China
| | - Ling Zhao
- grid.12981.330000 0001 2360 039XState Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-Sen University, Guangdong Provincial Key Laboratory of Ophthalmology and Visual Science, Guangzhou, 510060 China
| | - Wenru Su
- grid.12981.330000 0001 2360 039XState Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-Sen University, Guangdong Provincial Key Laboratory of Ophthalmology and Visual Science, Guangzhou, 510060 China
| | - Yehong Zhuo
- grid.12981.330000 0001 2360 039XState Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-Sen University, Guangdong Provincial Key Laboratory of Ophthalmology and Visual Science, Guangzhou, 510060 China
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21
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Sun TT, Li XM, Zhu JY, Yao W, Yang TJ, Meng XR, Yao J, Jiang Q. Regulatory effect of long-stranded non-coding RNA-CRNDE on neurodegeneration during retinal ischemia-reperfusion. Heliyon 2022; 8:e10994. [PMID: 36276743 PMCID: PMC9579004 DOI: 10.1016/j.heliyon.2022.e10994] [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: 05/26/2022] [Revised: 09/05/2022] [Accepted: 10/04/2022] [Indexed: 11/06/2022] Open
Abstract
Ischemia/reperfusion (I/R) injury is a common pathological mechanism involved in many ocular diseases. I/R is characterized by microvascular dysfunction and neurodegeneration. However, the mechanisms of neurodegeneration induced by I/R remain largely unknown. This study showed that the expression of long non-coding RNA-CRNDE was significantly upregulated after retinal ischemia-reperfusion (RIR). LncRNA-CRNDE knockdown alleviated retinal neurodegeneration induced by RIR injury, as shown by decreased reactive gliosis and reduced retinal cells loss. Furthermore, lncRNA-CRNDE knockdown directly regulated Müller cell function and indirectly affected RGC function in vitro. In addition, lncRNA-CRNDE knockdown led to a significant reduction in the release of several cytokines after RIR. This study suggests that lncRNA-CRNDE is a promising therapeutic target for RIR.
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Affiliation(s)
- Ting-Ting Sun
- The Affiliated Eye Hospital, Nanjing Medical University, Nanjing, China,The Fourth School of Clinical Medicine, Nanjing Medical University, Nanjing, China
| | - Xiu-Miao Li
- The Affiliated Eye Hospital, Nanjing Medical University, Nanjing, China,The Fourth School of Clinical Medicine, Nanjing Medical University, Nanjing, China
| | - Jun-Ya Zhu
- The Affiliated Eye Hospital, Nanjing Medical University, Nanjing, China,The Fourth School of Clinical Medicine, Nanjing Medical University, Nanjing, China
| | - Wen Yao
- The Affiliated Eye Hospital, Nanjing Medical University, Nanjing, China,The Fourth School of Clinical Medicine, Nanjing Medical University, Nanjing, China
| | - Tian-Jing Yang
- The Affiliated Eye Hospital, Nanjing Medical University, Nanjing, China,The Fourth School of Clinical Medicine, Nanjing Medical University, Nanjing, China
| | - Xiang-Rui Meng
- Faculty of Art and Science, Queens University, Kingston, Ontario, Canada
| | - Jin Yao
- The Affiliated Eye Hospital, Nanjing Medical University, Nanjing, China,The Fourth School of Clinical Medicine, Nanjing Medical University, Nanjing, China,Corresponding author.
| | - Qin Jiang
- The Affiliated Eye Hospital, Nanjing Medical University, Nanjing, China,The Fourth School of Clinical Medicine, Nanjing Medical University, Nanjing, China,Corresponding author.
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22
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Wang N, Yang Y, Liu Y, Huang L, Gu M, Wu Y, Xu L, Sun H, Guo W. Magnolol limits NFκB-dependent inflammation by targeting PPARγ relieving retinal ischemia/reperfusion injury. Int Immunopharmacol 2022; 112:109242. [PMID: 36152538 DOI: 10.1016/j.intimp.2022.109242] [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: 07/14/2022] [Revised: 08/29/2022] [Accepted: 09/06/2022] [Indexed: 11/30/2022]
Abstract
BACKGROUND Glaucoma is the leading cause of irreversible blindness in the world. Elevated intraocular pressure (IOP) is recognized as one of the most critical factors, but the loss of retinal ganglia cells (RGCs) often persists when IOP is controlled. Recently, a large number of studies focus on the inflammatory and immune responses in the occurrence and development of glaucoma. Magnolol (MAG), the principal ingredient of magnoliae officinalis cortex, has anti-inflammatory effects, but its role and mechanism in retinal protection need to be further studied. METHODS The neurodegeneration of retina in mice model following ischemia/reperfusion (IR) injury was evaluated by immunohistochemistry, hematoxylin and eosin (H&E) staining and electroretinography (ERG). The inflammation-regulatory effect of MAG was detected by quantitative RT-PCR, western blot, and immunohistochemistry. Peroxisome proliferator-activated receptor-γ (PPARγ) inhibitor assays by H&E staining and western blot were used to test the target and mechanism pathway of MAG. RESULTS We found MAG relieved IR-induced retinal damages and inflammation. Further studies revealed MAG alleviated nuclear factor kappa B (NFκB)-dependent inflammatory process by preserving the expression of NFκB inhibitor alpha (IκBα), and it modulated microglia polarization after IR injury. PPARγ was a primary target of MAG, and treatment with PPARγ inhibitor GW9662 attenuated the neuroprotective and anti-inflammatory effects of MAG. CONCLUSIONS Our findings revealed that MAG inhibits NFκB-dependent inflammatory processes by elevating PPARγ in mice retinas to achieve its neuroprotective role following IR, which suggesting that MAG could be developed to a novel anti-inflammatory therapeutic agent for relieving the progression of glaucoma.
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Affiliation(s)
- Ning Wang
- Department of Ophthalmology, Shanghai 9th People's Hospital Affiliated to Shanghai Jiaotong University School of Medicine, Shanghai 200011, China; Shanghai Key Laboratory of Orbital Diseases and Ocular Oncology, Shanghai, China
| | - Yijie Yang
- Department of Ophthalmology, Shanghai 9th People's Hospital Affiliated to Shanghai Jiaotong University School of Medicine, Shanghai 200011, China; Shanghai Key Laboratory of Orbital Diseases and Ocular Oncology, Shanghai, China
| | - Yixin Liu
- Department of Ophthalmology, Shanghai 9th People's Hospital Affiliated to Shanghai Jiaotong University School of Medicine, Shanghai 200011, China; Shanghai Key Laboratory of Orbital Diseases and Ocular Oncology, Shanghai, China
| | - Lulu Huang
- Department of Ophthalmology, Shanghai 9th People's Hospital Affiliated to Shanghai Jiaotong University School of Medicine, Shanghai 200011, China; Shanghai Key Laboratory of Orbital Diseases and Ocular Oncology, Shanghai, China
| | - Mengyang Gu
- Department of Ophthalmology, Shanghai 9th People's Hospital Affiliated to Shanghai Jiaotong University School of Medicine, Shanghai 200011, China; Shanghai Key Laboratory of Orbital Diseases and Ocular Oncology, Shanghai, China
| | - Yue Wu
- Department of Ophthalmology, Shanghai 9th People's Hospital Affiliated to Shanghai Jiaotong University School of Medicine, Shanghai 200011, China; Shanghai Key Laboratory of Orbital Diseases and Ocular Oncology, Shanghai, China
| | - Li Xu
- Department of Ophthalmology, Shanghai 9th People's Hospital Affiliated to Shanghai Jiaotong University School of Medicine, Shanghai 200011, China; Shanghai Key Laboratory of Orbital Diseases and Ocular Oncology, Shanghai, China.
| | - Hao Sun
- Department of Ophthalmology, Shanghai 9th People's Hospital Affiliated to Shanghai Jiaotong University School of Medicine, Shanghai 200011, China; Shanghai Key Laboratory of Orbital Diseases and Ocular Oncology, Shanghai, China.
| | - Wenyi Guo
- Department of Ophthalmology, Shanghai 9th People's Hospital Affiliated to Shanghai Jiaotong University School of Medicine, Shanghai 200011, China; Shanghai Key Laboratory of Orbital Diseases and Ocular Oncology, Shanghai, China.
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23
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Lu P, Shi Y, Ye D, Lu X, Tang X, Cheng L, Xu Y, Huang J. Intravitreal Injection of PACAP Attenuates Acute Ocular Hypertension-Induced Retinal Injury Via Anti-Apoptosis and Anti-Inflammation in Mice. Invest Ophthalmol Vis Sci 2022; 63:18. [PMID: 35293951 PMCID: PMC8944396 DOI: 10.1167/iovs.63.3.18] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023] Open
Abstract
Purpose Pituitary adenylate cyclase-activating polypeptide (PACAP) has shown potent neuroprotective effects in central nervous system and retina disorders. However, whether PACAP can attenuate retinal neurodegeneration induced by acute ocular hypertension (AOH) and the underlying mechanisms remain unknown. In this study, we aimed to investigate the effects of PACAP on the survival and function of retinal ganglion cells (RGCs), apoptosis, and inflammation in a mouse model of AOH injury. Methods PACAP was injected into the vitreous body immediately after inducing AOH injury. Hematoxylin and eosin staining and optical coherence tomography were used to evaluate the loss of retina tissue. Pattern electroretinogram was used to evaluate the function of RGCs. TUNEL assay was used to detect apoptosis. Immunofluorescence and western blot were employed to evaluate protein expression levels. Results PACAP treatment significantly reduced the losses of whole retina and inner retina thicknesses, Tuj1-positive RGCs, and the amplitudes of pattern electroretinograms induced by AOH injury. Additionally, PACAP treatment remarkably reduced the number of TUNEL-positive cells and inhibited the upregulation of Bim, Bax, and cleaved caspase-3 and downregulation of Bcl-xL after AOH injury. Moreover, PACAP markedly inhibited retinal reactive gliosis and vascular inflammation, as demonstrated by the downregulation of GFAP, Iba1, CD68, and CD45 in PACAP-treated mice. Furthermore, upregulated expression of NF-κB and phosphorylated NF-κB induced by AOH injury was attenuated by PACAP treatment. Conclusions PACAP could prevent the loss of retinal tissue and improve the survival and function of RGCs. The neuroprotective effect of PACAP is probably associated with its potent anti-apoptotic and anti-inflammatory effects.
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Affiliation(s)
- Peng Lu
- From the State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University, Guangdong Provincial Key Laboratory of Ophthalmology and Visual Science, Guangzhou, China
| | - Yuxun Shi
- From the State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University, Guangdong Provincial Key Laboratory of Ophthalmology and Visual Science, Guangzhou, China
| | - Dan Ye
- From the State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University, Guangdong Provincial Key Laboratory of Ophthalmology and Visual Science, Guangzhou, China
| | - Xi Lu
- From the State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University, Guangdong Provincial Key Laboratory of Ophthalmology and Visual Science, Guangzhou, China
| | - Xiaoyu Tang
- From the State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University, Guangdong Provincial Key Laboratory of Ophthalmology and Visual Science, Guangzhou, China
| | - Lu Cheng
- From the State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University, Guangdong Provincial Key Laboratory of Ophthalmology and Visual Science, Guangzhou, China
| | - Yue Xu
- From the State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University, Guangdong Provincial Key Laboratory of Ophthalmology and Visual Science, Guangzhou, China
| | - Jingjing Huang
- From the State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University, Guangdong Provincial Key Laboratory of Ophthalmology and Visual Science, Guangzhou, China
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Pan L, Sze YH, Yang M, Tang J, Zhao S, Yi I, To CH, Lam C, Chen DF, Cho KS, Do CW. Baicalein—A Potent Pro-Homeostatic Regulator of Microglia in Retinal Ischemic Injury. Front Immunol 2022; 13:837497. [PMID: 35265083 PMCID: PMC8899187 DOI: 10.3389/fimmu.2022.837497] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2021] [Accepted: 01/26/2022] [Indexed: 12/20/2022] Open
Abstract
Retinal ischemia is a common cause of many retinal diseases, leading to irreversible vision impairment and blindness. Excessive neuroinflammation, including microglial activation and T-cell responses, has been identified as a critical factor associated with neurodegeneration in retinal ischemia. Baicalein is a natural flavonoid reported to have broad anti-inflammatory and neuroprotective bioactivities. Herein, the effects of baicalein on microglia activation in vitro and in vivo were investigated. We found that baicalein exhibited robust anti-inflammatory effect on cultured human and mouse microglia, as demonstrated by decreased induction of pro-inflammatory cytokines and the phosphorylation of phosphoinositide 3-kinase (PI3K) and nuclear factor kappa B (NFκB). Proteomic analysis further unraveled baicalein’s effect on modulating IL-17 signaling pathways and its upstream regulator IL-1β. Intravitreal administration of baicalein in the mouse model of retinal ischemia/reperfusion (I/R) injury attenuated microglial activation and retinal T-cell infiltration, particularly the T helper 17 cells. Additionally, baicalein was shown to exert neuroprotective effects by significantly reducing the retinal ganglion cell (RGC) loss after I/R injury, leading to an improved retinal function and spatial vision. These results suggest that baicalein, a natural flavonoid, acts as a negative regulator of activated microglia and immune responses both in vitro and in vivo, effectively alleviating neurodegeneration in retinal I/R injury. This finding indicates that baicalein could be a potential therapeutic agent against currently incurable degenerative retinal diseases.
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Affiliation(s)
- Li Pan
- School of Optometry, The Hong Kong Polytechnic University, Kowloon, Hong Kong SAR, China
- Schepens Eye Research Institute of Massachusetts Eye and Ear, Department of Ophthalmology, Harvard Medical School, Boston, MA, United States
| | - Ying Hon Sze
- School of Optometry, The Hong Kong Polytechnic University, Kowloon, Hong Kong SAR, China
| | - Menglu Yang
- Schepens Eye Research Institute of Massachusetts Eye and Ear, Department of Ophthalmology, Harvard Medical School, Boston, MA, United States
| | - Jing Tang
- Schepens Eye Research Institute of Massachusetts Eye and Ear, Department of Ophthalmology, Harvard Medical School, Boston, MA, United States
- Department of Ophthalmology, West China Hospital, Sichuan University, Chengdu, China
| | - Siming Zhao
- Schepens Eye Research Institute of Massachusetts Eye and Ear, Department of Ophthalmology, Harvard Medical School, Boston, MA, United States
| | - Irvin Yi
- Schepens Eye Research Institute of Massachusetts Eye and Ear, Department of Ophthalmology, Harvard Medical School, Boston, MA, United States
| | - Chi-Ho To
- School of Optometry, The Hong Kong Polytechnic University, Kowloon, Hong Kong SAR, China
- Centre for Eye and Vision Research (CEVR), Hong Kong, Hong Kong SAR, China
| | - Chuen Lam
- School of Optometry, The Hong Kong Polytechnic University, Kowloon, Hong Kong SAR, China
- Centre for Eye and Vision Research (CEVR), Hong Kong, Hong Kong SAR, China
- The Hong Kong Polytechnic University Shenzhen Research Institute, Shenzhen, China
| | - Dong Feng Chen
- Schepens Eye Research Institute of Massachusetts Eye and Ear, Department of Ophthalmology, Harvard Medical School, Boston, MA, United States
- *Correspondence: Dong Feng Chen, ; Kin-Sang Cho, ; Chi-Wai Do,
| | - Kin-Sang Cho
- Schepens Eye Research Institute of Massachusetts Eye and Ear, Department of Ophthalmology, Harvard Medical School, Boston, MA, United States
- *Correspondence: Dong Feng Chen, ; Kin-Sang Cho, ; Chi-Wai Do,
| | - Chi-Wai Do
- School of Optometry, The Hong Kong Polytechnic University, Kowloon, Hong Kong SAR, China
- Centre for Eye and Vision Research (CEVR), Hong Kong, Hong Kong SAR, China
- *Correspondence: Dong Feng Chen, ; Kin-Sang Cho, ; Chi-Wai Do,
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25
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Boia R, Dias PA, Galindo-Romero C, Ferreira H, Aires ID, Vidal-Sanz M, Agudo-Barriuso M, Bernardes R, Santos PF, de Sousa HC, Ambrósio AF, Braga ME, Santiago AR. Intraocular implants loaded with A3R agonist rescue retinal ganglion cells from ischemic damage. J Control Release 2022; 343:469-481. [DOI: 10.1016/j.jconrel.2022.02.001] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2021] [Revised: 12/16/2021] [Accepted: 02/01/2022] [Indexed: 12/20/2022]
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26
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Zhang R, Feng Y, Lu J, Ge Y, Li H. lncRNA Ttc3-209 Promotes the Apoptosis of Retinal Ganglion Cells in Retinal Ischemia Reperfusion Injury by Targeting the miR-484/Wnt8a Axis. Invest Ophthalmol Vis Sci 2021; 62:13. [PMID: 33687475 PMCID: PMC7960841 DOI: 10.1167/iovs.62.3.13] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023] Open
Abstract
Purpose Apoptosis of the retinal ganglion cells (RGCs) can cause irreversible damage to visual function after retinal ischemia reperfusion injury (RIR). Using a lncRNA chip assay, we selected lncRNA Ttc-209 and characterized its role in RGCs during ischemia reperfusion (I/R)–induced apoptosis. Methods We created an ischemic model of RGCs by applying Hank's balanced salt solution containing 10 µM antimycin A and 2 µM calcium ionophore for 2 hours. RIR was induced in mice by elevating the intraocular pressure to 120 mm Hg for 1 hour by cannulation of the cornea; this was followed by reperfusion. Real-time quantitative PCR was used to detect the expression levels of long noncoding RNA (lncRNA), microRNA (miRNA), and target gene mRNA. Western blotting, flow cytometry, immunofluorescent staining, and TUNEL assays were performed to detect cell apoptosis. Dual-luciferase reporter assays and FISH were used to identify endogenous competitive RNA (ceRNA) mechanisms that link lncRNAs, miRNAs, and target genes. We also used scotopic electroretinography examinations to evaluate visual function in treated mice. Results lncRNA Ttc3-209 was significantly upregulated after I/R injury and played a proapoptotic role in RGCs during I/R-induced apoptosis. Mechanistically, lncRNA Ttc3-209 is a ceRNA that competitively binds to miR-484 and upregulates the translation of its target (Wnt8a mRNA), thus promoting apoptosis in RGCs. Conclusions Reducing the expression of lncRNA Ttc3-209 had a protective effect against apoptosis in RGCs. This may provide a new therapeutic option for the prevention of RGC apoptosis in response to RIR injury.
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Affiliation(s)
- Ran Zhang
- Department of Ophthalmology, The Second Xiangya Hospital, Central South University, Changsha, Hunan 410011, China.,Hunan Clinical Research Center of Ophthalmic Disease, Changsha, Hunan 410011, China
| | - Yuqing Feng
- Department of Ophthalmology, The Second Xiangya Hospital, Central South University, Changsha, Hunan 410011, China.,Hunan Clinical Research Center of Ophthalmic Disease, Changsha, Hunan 410011, China
| | - Jinfang Lu
- Department of Ophthalmology, The Second Xiangya Hospital, Central South University, Changsha, Hunan 410011, China.,Hunan Clinical Research Center of Ophthalmic Disease, Changsha, Hunan 410011, China
| | - Yanni Ge
- Department of Ophthalmology, The Second Xiangya Hospital, Central South University, Changsha, Hunan 410011, China.,Hunan Clinical Research Center of Ophthalmic Disease, Changsha, Hunan 410011, China
| | - Huiling Li
- Department of Ophthalmology, The Second Xiangya Hospital, Central South University, Changsha, Hunan 410011, China.,Hunan Clinical Research Center of Ophthalmic Disease, Changsha, Hunan 410011, China
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Kunimi H, Lee D, Ibuki M, Katada Y, Negishi K, Tsubota K, Kurihara T. Inhibition of the HIF-1α/BNIP3 pathway has a retinal neuroprotective effect. FASEB J 2021; 35:e21829. [PMID: 34314069 DOI: 10.1096/fj.202100572r] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2021] [Revised: 07/01/2021] [Accepted: 07/16/2021] [Indexed: 12/15/2022]
Abstract
Retinal ischemia is a leading cause of irreversible blindness worldwide. Inner retinal dysfunction including loss of retinal ganglion cells is encountered in a number of retinal ischemic disorders. We previously reported administration of two different hypoxia-inducible factor (HIF) inhibitors exerted neuroprotective effects in a murine model of retinal ischemia/reperfusion (I/R) which mimics these disorders, as inner retinal degeneration could be involved in pathological HIF induction. However, this notion needs further investigation. Therefore, in this study, we attempted to use retina-specific Hif-1α conditional knockout (cKO) mice to uncover this notion more clearly under the same condition. Hif-1α cKO mice showed inner retinal neurodegeneration to a lesser extent than control mice. Hif-1α depletion in a murine 661W retinal cell line reduced cell death under pseudohypoxic and hypoxic conditions. Among hypoxia-related genes, the expression of BCL2 19 kDa protein-interacting protein 3 (Bnip3) was substantially upregulated in the inner retinal layer after retinal I/R. In this regard, we further examined Bnip3 depletion in retinal neurons in vitro and in vivo and found the similar neuroprotective effects. Our results support the notion that the HIF-1α/BNIP3 pathway may have a critical role in inner retinal neurodegeneration, which can be linked with the development of new promising therapeutics for inner retinal ischemic disorders.
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Affiliation(s)
- Hiromitsu Kunimi
- Laboratory of Photobiology, Keio University School of Medicine, Shinanomachi, Japan.,Department of Ophthalmology, Keio University School of Medicine, Shinanomachi, Japan
| | - Deokho Lee
- Laboratory of Photobiology, Keio University School of Medicine, Shinanomachi, Japan.,Department of Ophthalmology, Keio University School of Medicine, Shinanomachi, Japan
| | - Mari Ibuki
- Laboratory of Photobiology, Keio University School of Medicine, Shinanomachi, Japan.,Department of Ophthalmology, Keio University School of Medicine, Shinanomachi, Japan
| | - Yusaku Katada
- Laboratory of Photobiology, Keio University School of Medicine, Shinanomachi, Japan.,Department of Ophthalmology, Keio University School of Medicine, Shinanomachi, Japan
| | - Kazuno Negishi
- Department of Ophthalmology, Keio University School of Medicine, Shinanomachi, Japan
| | - Kazuo Tsubota
- Department of Ophthalmology, Keio University School of Medicine, Shinanomachi, Japan.,Tsubota Laboratory, Inc., Tokyo, Japan
| | - Toshihide Kurihara
- Laboratory of Photobiology, Keio University School of Medicine, Shinanomachi, Japan.,Department of Ophthalmology, Keio University School of Medicine, Shinanomachi, Japan
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Keilhoff G, Titze M, Ebmeyer U. Immuno-histological detection of resistant columnar units and vulnerable networks in the rat retina after asphyxia-induced transient cardiac arrest. Restor Neurol Neurosci 2021; 39:267-289. [PMID: 34334436 DOI: 10.3233/rnn-211174] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
BACKGROUND Stroke-related loss of vision is one of the residual impairments, restricting the quality of life. However, studies of the ocular manifestations of asphyxia cardiac arrest/resuscitation (ACA/R) have reported very heterogeneous results. OBJECTIVE We aimed to evaluate the ACA/R-induced degeneration pattern of the different retinal cell populations in rats using different immuno-histological stainings. METHODS The staining pattern of toluidine blue and the ganglion cell markers β-III-tubulin and NeuN; the calcium-binding protein parvalbumin, indicating ganglion, amacrine, and horizontal cells; calretinin D28k, indicating ganglion and amacrine cells; calbindin, indicating horizontal cells; Chx 10, indicating cone bipolar cells; PKCα, indicating ON-type rod bipolar cells; arrestin, indicating cones; and rhodopsin, a marker of rods, as well as the glial cell markers GFAP (indicating astroglia and Müller cells) and IBA1 (indicating microglia), were evaluated after survival times of 7 and 21 days in an ACA/R rat model. Moreover, quantitative morphological analysis of the optic nerve was performed. The ACA/R specimens were compared with those from sham-operated and completely naïve rats. RESULTS ACA/R-induced effects were: (i) a significant reduction of retinal thickness after long-term survival; (ii) ganglion cell degeneration, including their fiber network in the inner plexiform layer; (iii) degeneration of amacrine and cone bipolar cells; (iv) degeneration of cone photoreceptors; (v) enhanced resistance to ACA/R by rod photoreceptors, ON-type rod bipolar and horizontal cells, possibly caused by the strong upregulation of the calcium-binding proteins calretinin, parvalbumin, and calbindin, counteracting the detrimental calcium overload; (vi) significant activation of Müller cells as further element of retinal anti-stress self-defense mechanisms; and (vii) morphological alterations of the optic nerve in form of deformed fibers. CONCLUSIONS Regardless of the many defects, the surviving neuronal structures seemed to be able to maintain retinal functionality, which can be additionally improved by regenerative processes true to the "use it or lose it" dogma.
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Affiliation(s)
- Gerburg Keilhoff
- Institute of Biochemistry and Cell Biology, Medical Faculty, University of Magdeburg, Magdeburg, Germany
| | - Maximilian Titze
- Institute of Biochemistry and Cell Biology, Medical Faculty, University of Magdeburg, Magdeburg, Germany
| | - Uwe Ebmeyer
- Department of Anesthesiology, Medical Faculty, University of Magdeburg, Magdeburg, Germany
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Li X, Ye Z, Pei S, Zheng D, Zhu L. Neuroprotective effect of minocycline on rat retinal ischemia-reperfusion injury. Mol Vis 2021; 27:438-456. [PMID: 34295142 PMCID: PMC8279698] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2020] [Accepted: 07/06/2021] [Indexed: 11/02/2022] Open
Abstract
Purpose To examine the neuroprotective effect of minocycline on retinal ischemia-reperfusion (IR) injury in rats and investigate its possible mechanism of action. Methods Retinal IR injury was established by increasing the intraocular pressure in rats up to 110 mmHg for 60 min. The animals with retinal IR injury were intraperitoneally injected with 22.5 mg/kg minocycline twice a day for 14 days. The control group received the same amount of saline. Subsequently, funduscopic examination, retinal thickness measurement, retinal microvascular morphology, full-field electroretinography (ERG), retinal apoptotic cell count, and remaining retinal ganglion cell (RGC) count were performed. The expression of iNOS, Bax, Bcl2, IL-1α, IL-6, TNF-α, caspase-3, GFAP, Iba-1, Hif-1α, and Nrf2 was examined with real-time PCR and western blotting. Results Minocycline treatment prevented IR-induced rat retinal edema and retinal cells apoptosis at the early stage and alleviated retina atrophy, blood vessel tortuosity, functional photoreceptor damage, and RGC degeneration at the late stage of the IR injury. At the molecular level, minocycline affected retinal gene and protein expression induced by IR. Conclusions The results suggested that minocycline has a neuroprotective effect on rat retinal IR injury, possibly through anti-inflammation, antiapoptosis, antioxidation, and inhibition of microglial activation.
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Affiliation(s)
- Xiaoli Li
- Institute of Advanced Materials for Nano-Bio Applications, School of Ophthalmology and Optometry, Wenzhou Medical University, Wenzhou, China,Henan Provincial People’s Hospital and People’s Hospital of Henan University, Henan Eye Institute, Henan Eye Hospital, Zhengzhou, China
| | - Zhiqiang Ye
- Institute of Advanced Materials for Nano-Bio Applications, School of Ophthalmology and Optometry, Wenzhou Medical University, Wenzhou, China
| | - Shuaili Pei
- Institute of Advanced Materials for Nano-Bio Applications, School of Ophthalmology and Optometry, Wenzhou Medical University, Wenzhou, China
| | - Dongliang Zheng
- Institute of Advanced Materials for Nano-Bio Applications, School of Ophthalmology and Optometry, Wenzhou Medical University, Wenzhou, China
| | - Lin Zhu
- Institute of Advanced Materials for Nano-Bio Applications, School of Ophthalmology and Optometry, Wenzhou Medical University, Wenzhou, China
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30
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San Cristóbal Epalza J, Palomares T, GarcÃa-Alonso I, Herrero de la Parte B. Histological Assessment of Rat Retinas with Ischemia-Reperfusion Injury. Eur Surg Res 2021; 62:144-150. [PMID: 33915540 DOI: 10.1159/000515832] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2021] [Accepted: 03/12/2021] [Indexed: 11/19/2022]
Abstract
INTRODUCTION Retinal ischemia-reperfusion (IR) injury occurs in pathological situations that interrupt the blood flow to the retina, such as is the case during central retinal artery occlusion (CRAO). The animal models described in the literature are based on the pressure produced by the weight of a given quantity of saline elevated to a certain height; however, to establish these parameters it is necessary to perform mathematical calculations that cannot be easily redone in the case of punctual variations of intraocular pressure (IOP). The aim of this study was to present a new system that allows us to reproduce the conditions of retinal IR and thereby properly assess the level of injury in retinal histological samples. METHODS We developed a retinal IR model in WAG/RijHsd rats based on CRAO through increasing IOP. To develop this model, we produced ischemia for 1 h using a hydrostatic pressure system that maintained a constant high IOP and then allowed reperfusion for 1 h. The injury attributable to IR was assessed by histological examination of retinal samples, determining whether there was histological damage and/or dendritic swelling and counting the outer nuclear layer cells showing cytoplasmic swelling. RESULTS The increase in IOP to 150 mm Hg produced CRAO, in turn causing observable histological damage and dendritic swelling in all retinas subjected to IR. Counting the number of cells showing cytoplasmic swelling yielded a mean of 102.5 ± 35 cells/field. The contralateral retinas were healthy, showing no significant changes. CONCLUSION The retinal IR model proposed is simple, reproducible, and allows variable durations of ischemia and reperfusion, and most importantly, it allows easy correction by adjusting the pressure of the sphygmomanometer, of any change in IOP to keep the ischemia stable, without having to recalculate the elevation height of the ischemia induction system. Moreover, the damage caused by IR can be effectively assessed by the type of histopathological assessment performed. For these reasons, it can be considered a reliable method for studying drugs that may prevent retinal IR injury.
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Affiliation(s)
- Juan San Cristóbal Epalza
- Department of Ophthalmology, Osakidetza Basque Health Service, Basurto University Hospital, Bilbao, Spain
| | - Teodoro Palomares
- Department of Surgery, Radiology, and Physical Medicine, University of The Basque Country, Leioa, Spain
| | - Ignacio GarcÃa-Alonso
- Department of Surgery, Radiology, and Physical Medicine, University of The Basque Country, Leioa, Spain.,BioCruces Bizkaia Health Research Institute, Barakaldo, Spain
| | - Borja Herrero de la Parte
- Department of Surgery, Radiology, and Physical Medicine, University of The Basque Country, Leioa, Spain.,BioCruces Bizkaia Health Research Institute, Barakaldo, Spain
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31
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Yao MD, Zhu Y, Zhang QY, Zhang HY, Li XM, Jiang Q, Yan B. CircRNA expression profile and functional analysis in retinal ischemia-reperfusion injury. Genomics 2021; 113:1482-1490. [PMID: 33771636 DOI: 10.1016/j.ygeno.2021.03.026] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2020] [Revised: 03/09/2021] [Accepted: 03/21/2021] [Indexed: 12/30/2022]
Abstract
Retinal ischemia-reperfusion (I/R) is involved in the pathogenesis of many vision-threatening diseases. circRNAs act as key players in gene regulation and human diseases. However, the global circRNA expression profile in retinal I/R injury has not been fully uncovered. Herein, we established a murine model of retinal I/R injury and performed circRNA microarrays to identify I/R-related circRNAs. 1265 differentially expressed circRNAs were identified between I/R retinas and normal retinas. Notably, the detection of cWDR37 level in aqueous humor could discriminate glaucoma patients from cataract patients (AUCÂ =Â 0.9367). cWdr37 silencing protected against hypoxic stress- or oxidative stress-induced retinal ganglion cell (RGC) injury. cWdr37 silencing alleviated IR-induced retinal neurodegeneration as shown by increased NeuN staining, reduced retinal reactive gliosis, and decreased retinal apoptosis. Collectively, this study provides a novel insight into the pathogenesis of retinal I/R injury. cWdr37 is a promising target for the diagnosis or treatment of I/R-related ocular diseases.
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Affiliation(s)
- Mu-Di Yao
- The Affiliated Eye Hospital, Nanjing Medical University, Nanjing, China; The Fourth School of Clinical Medicine, Nanjing Medical University, Nanjing, China
| | - Yan Zhu
- The Affiliated Eye Hospital, Nanjing Medical University, Nanjing, China; The Fourth School of Clinical Medicine, Nanjing Medical University, Nanjing, China
| | - Qiu-Yang Zhang
- The Affiliated Eye Hospital, Nanjing Medical University, Nanjing, China; The Fourth School of Clinical Medicine, Nanjing Medical University, Nanjing, China
| | - Hui-Ying Zhang
- The Affiliated Eye Hospital, Nanjing Medical University, Nanjing, China; The Fourth School of Clinical Medicine, Nanjing Medical University, Nanjing, China
| | - Xiu-Miao Li
- The Affiliated Eye Hospital, Nanjing Medical University, Nanjing, China; The Fourth School of Clinical Medicine, Nanjing Medical University, Nanjing, China
| | - Qin Jiang
- The Affiliated Eye Hospital, Nanjing Medical University, Nanjing, China; The Fourth School of Clinical Medicine, Nanjing Medical University, Nanjing, China.
| | - Biao Yan
- Eye Institute and Department of Ophthalmology, Eye & ENT Hospital, Shanghai Medical College, Fudan University, Shanghai, China; NHC Key Laboratory of Myopia (Fudan University), Key Laboratory of Myopia, Chinese Academy of Medical Sciences, China; Shanghai Key Laboratory of Visual Impairment and Restoration (Fudan University), Shanghai, China.
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32
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Rescue the retina after the ischemic injury by polymer-mediated intracellular superoxide dismutase delivery. Biomaterials 2020; 268:120600. [PMID: 33360507 DOI: 10.1016/j.biomaterials.2020.120600] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2020] [Revised: 11/14/2020] [Accepted: 12/08/2020] [Indexed: 02/06/2023]
Abstract
Oxidative stress is a hallmark of the pathophysiogenesis of retinal ischemia. The direct delivery of antioxidant enzymes such as superoxide dismutase (SOD) into retinal cells provides a promising option for the down-regulation of oxidative stress in retinal ischemia, however, efficient intracellular protein delivery remains a major challenge for this application. Here, a boronic acid-rich polymer was used for the intracellular delivery of SOD both in vitro and in vivo. The polymer assembled with SOD into uniform nanoparticles with high binding affinity, and transported the cargo protein into several cell lines with maintained bioactivity and low cytotoxicity. We investigated the intraocular biodistribution, therapeutic efficacy and safety of the SOD nanoformulation in a retinal ischemia/reperfusion (I/R) injury model. After intravitreal injection, the nanoparticles rapidly diffused through the vitreous and penetrated into retinal ganglion cells (RGCs). Compared to free SOD, the nanoformulation exhibited much enhanced therapeutic efficacy with reduced RGC apoptosis and protected retinal function. Enzymatic results confirmed that the SOD nanoformulation reduced malondialdehyde expression and increased glutathione level in the ocular tissues, and thereby down-regulated oxidative stress and prevented RGC loss. Overall, this work offers a new therapeutic option for the treatment of retinal ischemic disorders by direct delivery of antioxidant proteins.
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Jiang N, Li Z, Li Z, Zhang Y, Yu Z, Wan P, Zhu Y, Li Y, Su W, Zhuo Y. Laquinimod exerts anti-inflammatory and antiapoptotic effects in retinal ischemia/reperfusion injury. Int Immunopharmacol 2020; 88:106989. [PMID: 33182069 DOI: 10.1016/j.intimp.2020.106989] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2020] [Revised: 08/22/2020] [Accepted: 09/07/2020] [Indexed: 11/15/2022]
Abstract
Retinal ischemia/reperfusion (I/R) occurs in various vision disabled ocular diseases, involved in acute glaucoma, diabetic retinopathy, ischemic optic neuropathy, hypertensive retinopathy and retinal vascular occlusion. Laquinimod (LQ), a new type of immunosuppressant, has been reported to exert anti-inflammatory effects on autoimmune diseases. This research aims to investigate the protective effect of LQ on I/R damage by focusing on inhibiting dysregulated neuroinflammation and neuronal apoptosis. In our study, mice were treated with LQ after high intraocular pressure (IOP)-induced retinal I/R injury. The data showed that LQ significantly attenuated high IOP-induced retinal ganglion cell (RGC) death and inner plexiform layer (IPL) thinning and inhibited microglial activation. The results of qRT-PCR, flow cytometry and Luminex multiplex assays demonstrated the anti-inflammatory action of LQ in BV2 cells stimulated with lipopolysaccharide (LPS). In addition, primary RGC apoptosis induced by oxygen-glucose deprivation/reperfusion (OGD/R) was also directly suppressed by LQ. Importantly, LQ inhibited the expression of cleaved caspase-8 and the downstream NLRP3 inflammasome and IL-1β. In conclusion, our findings offer the first evidence that LQ treatment prevents retinal I/R damage. Furthermore, LQ could directly inhibit RGC apoptosis. Caspase-8 activation and subsequent inflammation can also be suppressed by LQ, which suggests that LQ may act through inhibiting the caspase-8 pathway. This study demonstrates a new mechanism of LQ and provides beneficial preclinical data for the clinical application of LQ.
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Affiliation(s)
- Nan Jiang
- State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University, Guangzhou, China
| | - Zhidong Li
- State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University, Guangzhou, China
| | - Zuohong Li
- State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University, Guangzhou, China
| | - Yingying Zhang
- State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University, Guangzhou, China
| | - Ziyu Yu
- State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University, Guangzhou, China
| | - Peixing Wan
- State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University, Guangzhou, China
| | - Yingting Zhu
- State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University, Guangzhou, China
| | - Yiqing Li
- State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University, Guangzhou, China
| | - Wenru Su
- State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University, Guangzhou, China.
| | - Yehong Zhuo
- State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University, Guangzhou, China.
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34
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Chong RS, Busoy JMF, Tan B, Yeo SW, Lee YS, Barathi AV, Crowston JG, Schmetterer L. A Minimally Invasive Experimental Model of Acute Ocular Hypertension with Acute Angle Closure Characteristics. Transl Vis Sci Technol 2020; 9:24. [PMID: 32832230 PMCID: PMC7414621 DOI: 10.1167/tvst.9.7.24] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2019] [Accepted: 05/04/2020] [Indexed: 12/21/2022] Open
Abstract
Purpose To describe a minimally invasive experimental model of acute ocular hypertension (OHT) with characteristics of acute angle closure (AAC). Methods Adult C57/Bl6 mice (n = 31) were subjected to OHT in one eye using a modified circumlimbal suture technique that elevated intraocular pressure (IOP) for 30 minutes. Contralateral un-operated eyes served as controls. IOP, anterior segment optical coherence tomography, and fundus fluorescein angiography (FFA) were performed. The positive scotopic threshold response (pSTR) and a-wave and b-wave amplitudes were also evaluated. Retinal tissues were immunostained for the retinal ganglion cell (RGC) marker RBPMS and the glial marker GFAP. Results OHT eyes developed shallower anterior chambers and dilated pupils. FFA showed focal leakage in 32.2% of OHT eyes, but in none of the control eyes. pSTR was significantly reduced at week 1 in OHT eyes compared to control eyes (57.3 ± 7.2 µV vs. 106.9 ± 24.8 µV; P < 0.05), but a- and b-waves were unaffected. GFAP was upregulated in OHT eyes but not in control eyes or eyes that had been sutured without OHT. RGC density was reduced in OHT eyes after 4 weeks (3857 ± 143.8) vs. control eyes (4469 ± 176.0) (P < 0.05). Conclusions Our minimally invasive model resulted in acute OHT with characteristics of AAC in the absence of non-OHT-related neuroinflammatory changes arising from ocular injury alone. Translational Relevance This model provides a valuable approach to studying specific characteristics of a severe blinding disease in an experimental setting. Focal areas of ischemia were demonstrated, consistent with clinical studies of acute angle closure patients elsewhere, which may indicate the need for further research into how this could affect visual outcome in these patients.
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Affiliation(s)
- Rachel S Chong
- Singapore Eye Research Institute, Singapore National Eye Centre, Singapore, Singapore.,Glaucoma Department, Singapore National Eye Centre, Singapore, Singapore.,Agency for Science, Technology and Research, Singapore, Singapore.,Ophthalmology and Visual Sciences Academic Clinical Program, Duke-NUS Medical School, Singapore, Singapore.,Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore
| | - Joanna M F Busoy
- Singapore Eye Research Institute, Singapore National Eye Centre, Singapore, Singapore
| | - Bingyao Tan
- Singapore Eye Research Institute, Singapore National Eye Centre, Singapore, Singapore
| | - Sia Wey Yeo
- Singapore Eye Research Institute, Singapore National Eye Centre, Singapore, Singapore
| | - Ying Shi Lee
- Singapore Eye Research Institute, Singapore National Eye Centre, Singapore, Singapore
| | - Amutha V Barathi
- Singapore Eye Research Institute, Singapore National Eye Centre, Singapore, Singapore.,Ophthalmology and Visual Sciences Academic Clinical Program, Duke-NUS Medical School, Singapore, Singapore.,Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore
| | - Jonathan G Crowston
- Singapore Eye Research Institute, Singapore National Eye Centre, Singapore, Singapore.,Ophthalmology and Visual Sciences Academic Clinical Program, Duke-NUS Medical School, Singapore, Singapore
| | - Leopold Schmetterer
- Singapore Eye Research Institute, Singapore National Eye Centre, Singapore, Singapore.,Ophthalmology and Visual Sciences Academic Clinical Program, Duke-NUS Medical School, Singapore, Singapore.,School of Chemical and Biomedical Engineering, Nanyang Technological University, Singapore, Singapore.,Department of Clinical Pharmacology, Medical University of Vienna, Vienna, Austria.,SERI-NTU Advanced Ocular Engineering (STANCE), Singapore, Singapore
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Microglia Activation in Retinal Ischemia Triggers Cytokine and Toll-Like Receptor Response. J Mol Neurosci 2020; 71:527-544. [PMID: 32833183 PMCID: PMC8575759 DOI: 10.1007/s12031-020-01674-w] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2020] [Accepted: 07/24/2020] [Indexed: 12/20/2022]
Abstract
Mechanisms and progression of ischemic injuries in the retina are still incompletely clarified. Therefore, the time course of microglia activation as well as resulting cytokine expression and downstream signaling were investigated. Ischemia was induced in one eye by transiently elevated intraocular pressure (60 min) followed by reperfusion; the other eye served as a control. Eyes were processed for RT-qPCR and immunohistochemistry analyses at 2, 6, 12, and 24 h as well as at 3 and 7 days. Already 2 h after ischemia, more microglia/macrophages were in an active state in the ischemia group. This was accompanied by an upregulation of pro-inflammatory cytokines, like IL-1β, IL-6, TNFα, and TGFβ. Activation of TLR3, TLR2, and the adaptor molecule Myd88 was also observed after 2 h. NFκB revealed a wave-like activation pattern. In addition, an extrinsic caspase pathway activation was noted at early time points, while enhanced numbers of cleaved caspase 3+ cells could be observed in ischemic retinae throughout the study. Retinal ischemia induced an early and strong microglia/macrophage response as well as cytokine and apoptotic activation processes. Moreover, in early and late ischemic damaging processes, TLR expression and downstream signaling were involved, suggesting an involvement in neuronal death in ischemic retinae. Graphical Abstract.
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Khanh Vu TH, Chen H, Pan L, Cho KS, Doesburg D, Thee EF, Wu N, Arlotti E, Jager MJ, Chen DF. CD4 + T-Cell Responses Mediate Progressive Neurodegeneration in Experimental Ischemic Retinopathy. THE AMERICAN JOURNAL OF PATHOLOGY 2020; 190:1723-1734. [PMID: 32389572 DOI: 10.1016/j.ajpath.2020.04.011] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/19/2019] [Revised: 04/14/2020] [Accepted: 04/21/2020] [Indexed: 11/17/2022]
Abstract
Retinal ischemic events, which result from occlusion of the ocular vasculature share similar causes as those for central nervous system stroke and are among the most common cause of acute and irreversible vision loss in elderly patients. Currently, there is no established treatment, and the condition often leaves patients with seriously impaired vision or blindness. The immune system, particularly T-cell-mediated responses, is thought to be intricately involved, but the exact roles remain elusive. We found that acute ischemia-reperfusion injury to the retina induced a prolonged phase of retinal ganglion cell loss that continued to progress during 8 weeks after the procedure. This phase was accompanied by microglial activation and CD4+ T-cell infiltration into the retina. Adoptive transfer of CD4+ T cells isolated from diseased mice exacerbated retinal ganglion cell loss in mice with retinal reperfusion damage. On the other hand, T-cell deficiency or administration of T-cell or interferon-γ-neutralizing antibody attenuated retinal ganglion cell degeneration and retinal function loss after injury. These findings demonstrate a crucial role for T-cell-mediated responses in the pathogenesis of neural ischemia. These findings point to novel therapeutic targets of limiting or preventing neuron and function loss for currently untreatable conditions of optic neuropathy and/or central nervous system ischemic stroke.
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Affiliation(s)
- Thi Hong Khanh Vu
- Schepens Eye Research Institute of Massachusetts Eye and Ear, Department of Ophthalmology, Harvard Medical School, Boston, Massachusetts; Department of Ophthalmology, Leiden University Medical Center, Leiden, the Netherlands
| | - Huihui Chen
- Schepens Eye Research Institute of Massachusetts Eye and Ear, Department of Ophthalmology, Harvard Medical School, Boston, Massachusetts; The Second Xiangya Hospital, Central South University, Changsha, Hunan, China
| | - Li Pan
- Schepens Eye Research Institute of Massachusetts Eye and Ear, Department of Ophthalmology, Harvard Medical School, Boston, Massachusetts; School of Optometry, The Hong Kong Polytechnic University, Hong Kong, China
| | - Kin-Sang Cho
- Schepens Eye Research Institute of Massachusetts Eye and Ear, Department of Ophthalmology, Harvard Medical School, Boston, Massachusetts; Geriatric Research Education and Clinical Center, Office of Research and Development, Edith Nourse Rogers Memorial Veterans Hospital, Bedford, Massachusetts
| | - Djoeke Doesburg
- Schepens Eye Research Institute of Massachusetts Eye and Ear, Department of Ophthalmology, Harvard Medical School, Boston, Massachusetts; Department of Ophthalmology, Leiden University Medical Center, Leiden, the Netherlands
| | - Eric F Thee
- Schepens Eye Research Institute of Massachusetts Eye and Ear, Department of Ophthalmology, Harvard Medical School, Boston, Massachusetts; Department of Ophthalmology, Leiden University Medical Center, Leiden, the Netherlands
| | - Nan Wu
- Schepens Eye Research Institute of Massachusetts Eye and Ear, Department of Ophthalmology, Harvard Medical School, Boston, Massachusetts; Department of Ophthalmology, Southwest Eye Hospital, Southwest Hospital, Third Military Medical University, Chongqing, China
| | - Elisa Arlotti
- Schepens Eye Research Institute of Massachusetts Eye and Ear, Department of Ophthalmology, Harvard Medical School, Boston, Massachusetts; Department of Ophthalmology, Leiden University Medical Center, Leiden, the Netherlands
| | - Martine J Jager
- Department of Ophthalmology, Leiden University Medical Center, Leiden, the Netherlands
| | - Dong Feng Chen
- Schepens Eye Research Institute of Massachusetts Eye and Ear, Department of Ophthalmology, Harvard Medical School, Boston, Massachusetts.
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Han L, Zhang M, Yang Z, Diao K, Jia X, Li M, Tian G. Huoxue-Tongluo-Lishui-Decoction is visual-protective against retinal ischemia-reperfusion injury. Pharmacotherapy 2020; 125:109998. [PMID: 32070875 DOI: 10.1016/j.biopha.2020.109998] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2019] [Revised: 01/22/2020] [Accepted: 02/06/2020] [Indexed: 12/26/2022]
Abstract
Retinal ischemia reperfusion injury (IRI) is a leading cause of visual impairment or blindness, and an effective way to prevent the visual loss needs to be developed. Although decades of clinical application of Huoxue-Tongluo-Lishui-Decoction (HTLD) has demonstrated its reliable clinical efficacy against retinal IRI, no convincing randomized controlled trials were conducted in humans or animals, and the associated mechanism still needs to be explored. To confirm the protective effect of HTLD against retinal IRI and to explore its underlying mechanisms, a standard retinal IRI animal model, randomized controlled trials, objective evaluation and examination methods were adopted in this study. Flash visual evoked potentials (F-VEP) was performed 8 weeks post-reperfusion. The results showed that the medium dose of HTLD had better treatment effects than low dose of HTLD. High dose of HTLD did not further improve visual function relative to medium dose of HTLD, but had poor performance in the latency of P2 wave. The angio-optical coherence tomography (angio-OCT) examination showed that retinal nerve fiber layer (RNFL) became edematous in the early stage, then the edema subsided, and RNFL became thinning in the late stage. HTLD reduced the swelling of RNFL in the early stage and prevented the thinning of RNFL in the late stage. Similar to F-VEP, medium dose of HTLD has the best neural-protective effects against retinal IRI. In mechanisms, HTLD treatment not only enhanced autophagy at 6 h after reperfusion, but extended the enhancing effect until at least 24 h. HTLD treatment significantly reduced the cleaved Caspase-3, cleaved PARP and Caspase-3 activity at 48 h after reperfusion. HTLD inhibited neuro-toxic cytokines expression in retinal IRI by modulating Akt/NF-kB signaling. HTLD treatment enhanced the expressions of L-glutamate/L-aspartate transporter (GLAST) and glutamine synthetase (GS), and lower the concentration of free glutamate in retina after reperfusion. The phosphorylation of iNOS increased significantly in retinal IRI at 6 h, and HTLD treatment suppressed the phosphorylation of Inducible nitric oxide synthetase (iNOS). In conclusion, HTLD is visual-protective against retinal IRI, and the regulation of autophagy, apoptosis and neuro-toxic mediators may be the underlying mechanisms. These findings may provide new ideas for the clinical treatment of retinal IRI related diseases.
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Affiliation(s)
- Longhui Han
- Hebei Provincial Key Laboratory of Ophthalmology, Hebei Provincial Eye Institute, Hebei Provincial Eye Hospital, Xingtai, Hebei, 054001, China; Tianjin Medical University Eye Hospital/Eye Institute, School of Optometry and Ophthalmology, Tianjin Medical University, Tianjin, 300384, China.
| | - Minglian Zhang
- Hebei Provincial Key Laboratory of Ophthalmology, Hebei Provincial Eye Institute, Hebei Provincial Eye Hospital, Xingtai, Hebei, 054001, China.
| | - Zanzhang Yang
- Hebei Provincial Key Laboratory of Ophthalmology, Hebei Provincial Eye Institute, Hebei Provincial Eye Hospital, Xingtai, Hebei, 054001, China
| | - Ke Diao
- Hebei Provincial Key Laboratory of Ophthalmology, Hebei Provincial Eye Institute, Hebei Provincial Eye Hospital, Xingtai, Hebei, 054001, China
| | - Xin Jia
- Hebei Provincial Key Laboratory of Ophthalmology, Hebei Provincial Eye Institute, Hebei Provincial Eye Hospital, Xingtai, Hebei, 054001, China
| | - Mingran Li
- Hebei Provincial Key Laboratory of Ophthalmology, Hebei Provincial Eye Institute, Hebei Provincial Eye Hospital, Xingtai, Hebei, 054001, China
| | - Genquan Tian
- Hebei Provincial Key Laboratory of Ophthalmology, Hebei Provincial Eye Institute, Hebei Provincial Eye Hospital, Xingtai, Hebei, 054001, China
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Pang IH, Clark AF. Inducible rodent models of glaucoma. Prog Retin Eye Res 2020; 75:100799. [PMID: 31557521 PMCID: PMC7085984 DOI: 10.1016/j.preteyeres.2019.100799] [Citation(s) in RCA: 81] [Impact Index Per Article: 20.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2019] [Revised: 09/16/2019] [Accepted: 09/18/2019] [Indexed: 11/23/2022]
Abstract
Glaucoma is one of the leading causes of vision impairment worldwide. In order to further understand the molecular pathobiology of this disease and to develop better therapies, clinically relevant animal models are necessary. In recent years, both the rat and mouse have become popular models in glaucoma research. Key reasons are: many important biological similarities shared among rodent eyes and the human eye; development of improved methods to induce glaucoma and to evaluate glaucomatous damage; availability of genetic tools in the mouse; as well as the relatively low cost of rodent studies. Commonly studied rat and mouse glaucoma models include intraocular pressure (IOP)-dependent and pressure-independent models. The pressure-dependent models address the most important risk factor of elevated IOP, whereas the pressure-independent models assess "normal tension" glaucoma and other "non-IOP" related factors associated with glaucomatous damage. The current article provides descriptions of these models, their characterizations, specific techniques to induce glaucoma, mechanisms of injury, advantages, and limitations.
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Affiliation(s)
- Iok-Hou Pang
- North Texas Eye Research Institute, University of North Texas Health Science Center, Fort Worth, Texas, USA; Department of Pharmaceutical Sciences, University of North Texas Health Science Center, Fort Worth, Texas, USA
| | - Abbot F Clark
- North Texas Eye Research Institute, University of North Texas Health Science Center, Fort Worth, Texas, USA; Department of Pharmacology & Neuroscience, University of North Texas Health Science Center, Fort Worth, Texas, USA.
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Ge Y, Zhang R, Feng Y, Li H. Mbd2 Mediates Retinal Cell Apoptosis by Targeting the lncRNA Mbd2-AL1/miR-188-3p/Traf3 Axis in Ischemia/Reperfusion Injury. MOLECULAR THERAPY-NUCLEIC ACIDS 2020; 19:1250-1265. [PMID: 32074940 PMCID: PMC7025978 DOI: 10.1016/j.omtn.2020.01.011] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/13/2019] [Accepted: 01/03/2020] [Indexed: 12/19/2022]
Abstract
Recent studies reported that DNA methylation was involved in retinal cell death. Methyl-CpG binding domain protein 2 (Mbd2) is one of the DNA methylation readers. Its role and mechanism of regulation remain unclear. The ischemia/reperfusion (I/R) model in mice primary culture retinal ganglion cells (RGCs) and Mbd2 knockout (Mbd2-KO) mice was used in the current study. We demonstrated that Mbd2 mediates RGC apoptosis caused by I/R injury. Mechanistically, the data suggested that Mbd2 upregulated Mbd2-associated long noncoding RNA 1 (Mbd2-AL1) via demethylation of its promoter. Furthermore, Mbd2-AL1 sponged microRNA (miR)-188-3p, thus preventing tumor necrosis factor (TNF) receptor-associated factor 3 (Traf3) downregulation and inducing RGC apoptosis. This was further demonstrated by the fact that inhibition of miR-188-3p diminished the anti-apoptosis role of Mbd2-AL1 small interfering RNA (siRNA). Finally, it showed that the apoptosis of retinal cells was attenuated, and the visual function was preserved in Mbd2-KO mice, which were associated with the Mbd2-AL1/miR-188-3p/Traf3 axis. Our present study revealed the role of Mbd2 in RGC apoptosis, which may provide a novel therapeutic strategy for retinal ischemic diseases.
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Affiliation(s)
- Yanni Ge
- Department of Ophthalmology in the Second Xiangya Hospital, Central South University, Changsha, 410011 Hunan, China; Hunan Clinical Research Center of Ophthalmic Disease, Changsha, 410011 Hunan, China
| | - Ran Zhang
- Department of Ophthalmology in the Second Xiangya Hospital, Central South University, Changsha, 410011 Hunan, China; Hunan Clinical Research Center of Ophthalmic Disease, Changsha, 410011 Hunan, China
| | - Yuqing Feng
- Department of Ophthalmology in the Second Xiangya Hospital, Central South University, Changsha, 410011 Hunan, China; Hunan Clinical Research Center of Ophthalmic Disease, Changsha, 410011 Hunan, China
| | - Huiling Li
- Department of Ophthalmology in the Second Xiangya Hospital, Central South University, Changsha, 410011 Hunan, China; Hunan Clinical Research Center of Ophthalmic Disease, Changsha, 410011 Hunan, China.
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40
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Pauly D, Agarwal D, Dana N, Schäfer N, Biber J, Wunderlich KA, Jabri Y, Straub T, Zhang NR, Gautam AK, Weber BHF, Hauck SM, Kim M, Curcio CA, Stambolian D, Li M, Grosche A. Cell-Type-Specific Complement Expression in the Healthy and Diseased Retina. Cell Rep 2019; 29:2835-2848.e4. [PMID: 31775049 PMCID: PMC6911814 DOI: 10.1016/j.celrep.2019.10.084] [Citation(s) in RCA: 68] [Impact Index Per Article: 13.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2019] [Revised: 05/24/2019] [Accepted: 10/22/2019] [Indexed: 02/06/2023] Open
Abstract
Complement dysregulation is a feature of many retinal diseases, yet mechanistic understanding at the cellular level is limited. Given this knowledge gap about which retinal cells express complement, we performed single-cell RNA sequencing on ~92,000 mouse retinal cells and validated our results in five major purified retinal cell types. We found evidence for a distributed cell-type-specific complement expression across 11 cell types. Notably, Müller cells are the major contributor of complement activators c1s, c3, c4, and cfb. Retinal pigment epithelium (RPE) mainly expresses cfh and the terminal complement components, whereas cfi and cfp transcripts are most abundant in neurons. Aging enhances c1s, cfb, cfp, and cfi expression, while cfh expression decreases. Transient retinal ischemia increases complement expression in microglia, Müller cells, and RPE. In summary, we report a unique complement expression signature for murine retinal cell types suggesting a well-orchestrated regulation of local complement expression in the retinal microenvironment. Overshooting complement activity contributes to retinal degeneration. Pauly et al. demonstrate a distinct complement expression profile of retinal cell types that changes with aging and during retinal degeneration. This prompts the intriguing concept of a local retinal complement activation possibly independent of the systemic components typically produced by the liver.
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Affiliation(s)
- Diana Pauly
- Experimental Ophthalmology, University Hospital Regensburg, Regensburg 93053, Germany.
| | - Divyansh Agarwal
- Genomics and Computational Biology, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA 19104, USA
| | - Nicholas Dana
- Department of Ophthalmology, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA 19104, USA
| | - Nicole Schäfer
- Experimental Ophthalmology, University Hospital Regensburg, Regensburg 93053, Germany
| | - Josef Biber
- Department of Physiological Genomics, Biomedical Center, Ludwig Maximilians University Munich, Planegg-Martinsried 82152, Germany
| | - Kirsten A Wunderlich
- Department of Physiological Genomics, Biomedical Center, Ludwig Maximilians University Munich, Planegg-Martinsried 82152, Germany
| | - Yassin Jabri
- Experimental Ophthalmology, University Hospital Regensburg, Regensburg 93053, Germany
| | - Tobias Straub
- Core Facility Bioinformatics, Biomedical Center, Ludwig Maximilians University Munich, Planegg-Martinsried 82152, Germany
| | - Nancy R Zhang
- Department of Statistics, The Wharton School, University of Pennsylvania, Philadelphia, PA 19104, USA
| | - Avneesh K Gautam
- Department of Medicine, Immunology and Allergy, Brigham and Women's Hospital, Harvard Medical School, Boston, MA 02115, USA
| | - Bernhard H F Weber
- Institute of Human Genetics, University of Regensburg, Regensburg 93053, Germany
| | - Stefanie M Hauck
- Research Unit Protein Science, Helmholtz Center Munich, Research Center for Environmental Health (GmbH), Munich 80939, Germany
| | - Mijin Kim
- Department of Ophthalmology, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA 19104, USA
| | - Christine A Curcio
- Department of Ophthalmology and Visual Sciences, University of Alabama at Birmingham, Birmingham, AL 35294-0019, USA
| | - Dwight Stambolian
- Department of Ophthalmology, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA 19104, USA
| | - Mingyao Li
- Department of Biostatistics, Epidemiology and Informatics, University of Pennsylvania Perelman School of Medicine, Philadelphia, PA 19104, USA
| | - Antje Grosche
- Department of Physiological Genomics, Biomedical Center, Ludwig Maximilians University Munich, Planegg-Martinsried 82152, Germany.
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Sung MS, Heo H, Eom GH, Kim SY, Piao H, Guo Y, Park SW. HDAC2 Regulates Glial Cell Activation in Ischemic Mouse Retina. Int J Mol Sci 2019; 20:ijms20205159. [PMID: 31627491 PMCID: PMC6829428 DOI: 10.3390/ijms20205159] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2019] [Revised: 10/10/2019] [Accepted: 10/16/2019] [Indexed: 11/29/2022] Open
Abstract
The current study was undertaken to investigate whether histone deacetylases (HDACs) can modulate the viability of retinal ganglion cells (RGCs) and the activity of glial cells in a mouse model of retinal ischemia-reperfusion (IR) injury. C57BL/6J mice were subjected to constant elevation of intraocular pressure for 60 min to induce retinal IR injury. Expression of macroglial and microglial cell markers (GFAP and Iba1), hypoxia inducing factor (HIF)-1α, and histone acetylation was analyzed after IR injury. To investigate the role of HDACs in the activation of glial cells, overexpression of HDAC1 and HDAC2 isoforms was performed. To determine the effect of HDAC inhibition on RGC survival, trichostatin-A (TSA, 2.5 mg/kg) was injected intraperitoneally. After IR injury, retinal GFAP, Iba1, and HIF-1α were upregulated. Conversely, retinal histone acetylation was downregulated. Notably, adenoviral-induced overexpression of HDAC2 enhanced glial activation following IR injury, whereas overexpression of HDAC1 did not significantly affect glial activation. TSA treatment significantly increased RGC survival after IR injury. Our results suggest that increased activity of HDAC2 is closely related to glial activation in a mouse model of retinal IR injury and inhibition of HDACs by TSA showed neuroprotective potential in retinas with IR injuries.
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Affiliation(s)
- Mi Sun Sung
- Department of Ophthalmology, Chonnam National University Medical School and Hospital, Gwangju 61469, Korea.
| | - Hwan Heo
- Department of Ophthalmology, Chonnam National University Medical School and Hospital, Gwangju 61469, Korea.
| | - Gwang Hyeon Eom
- Department of Pharmacology, Chonnam National University Medical School, Hwasungun 58128, Korea.
| | - So Young Kim
- Department of Ophthalmology, Chonnam National University Medical School and Hospital, Gwangju 61469, Korea.
| | - Helong Piao
- Department of Ophthalmology, Chonnam National University Medical School and Hospital, Gwangju 61469, Korea.
| | - Yue Guo
- Department of Ophthalmology, Chonnam National University Medical School and Hospital, Gwangju 61469, Korea.
| | - Sang Woo Park
- Department of Ophthalmology, Chonnam National University Medical School and Hospital, Gwangju 61469, Korea.
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Chan KC, Yu Y, Ng SH, Mak HK, Yip YWY, van der Merwe Y, Ren T, Yung JSY, Biswas S, Cao X, Chau Y, Leung CKS. Intracameral injection of a chemically cross-linked hydrogel to study chronic neurodegeneration in glaucoma. Acta Biomater 2019; 94:219-231. [PMID: 31176841 DOI: 10.1016/j.actbio.2019.06.005] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/26/2018] [Revised: 06/03/2019] [Accepted: 06/04/2019] [Indexed: 01/26/2023]
Abstract
Investigation of neurodegeneration in glaucoma, a leading cause of irreversible blindness worldwide, has been obfuscated by the lack of an efficient model that provides chronic, mild to moderate elevation of intraocular pressure (IOP) with preservation of optical media clarity for long term, in vivo interrogation of the structural and functional integrity of the retinal ganglion cells (RGCs). Here, we designed and formulated an injectable hydrogel based on in situ cross-linking of hyaluronic acid functionalized with vinyl sulfone (HA-VS) and thiol groups (HA-SH). Intracameral injection of HA-VS and HA-SH in C57BL/6J mice exhibited mild to moderate elevation of IOP with daily mean IOP ranged between 14 ± 3 and 24 ± 3 mmHg, which led to progressive, regional loss of RGCs evaluated with in vivo, time-lapse confocal scanning laser ophthalmoscopy; a reduction in fractional anisotropy in the optic nerve and the optic tract projected from the eye with increased IOP in diffusion tensor magnetic resonance imaging; a decrease in positive scotopic threshold response in electroretinography; and a decline in visual acuity measured with an optokinetic virtual reality system. The proportion of RGC loss was positively associated with the age of the animals, and the levels and the duration of IOP elevation. The new glaucoma model recapitulates key characteristics of human glaucoma which is pertinent to the development and pre-clinical testing of neuroprotective and neuroregenerative therapies. STATEMENT OF SIGNIFICANCE: A new model to study chronic neurodegeneration in glaucoma has been developed via intracameral injection of a specifically designed hyaluronic acid functionalized with vinyl sulfone and thiol groups for cross-linking. Intracameral injection of the chemically cross-linked hydrogel generates mild to moderate IOP elevation, resulting in progressive degeneration of the retinal ganglion cells, optic nerve, and optic tract, and a decline in visual function. The model recapitulates the key features of neurodegeneration in human glaucoma, which will facilitate and expedite the development of neuroprotective and neuroregenerative therapies.
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Affiliation(s)
- Kevin C Chan
- Departments of Ophthalmology and Bioengineering, University of Pittsburgh, Pittsburgh, PA, USA; Departments of Ophthalmology and Radiology, NYU School of Medicine, NYU Langone Health, New York University, New York, NY, USA
| | - Yu Yu
- Department of Chemical and Biological Engineering, The Hong Kong University of Science and Technology, Hong Kong, PR China
| | - Shuk Han Ng
- Department of Ophthalmology and Visual Sciences, The Chinese University of Hong Kong, Hong Kong, PR China
| | - Heather K Mak
- Department of Ophthalmology and Visual Sciences, The Chinese University of Hong Kong, Hong Kong, PR China
| | - Yolanda W Y Yip
- Department of Ophthalmology and Visual Sciences, The Chinese University of Hong Kong, Hong Kong, PR China
| | - Yolandi van der Merwe
- Departments of Ophthalmology and Bioengineering, University of Pittsburgh, Pittsburgh, PA, USA
| | - Tianmin Ren
- Department of Ophthalmology and Visual Sciences, The Chinese University of Hong Kong, Hong Kong, PR China
| | - Jasmine S Y Yung
- Department of Ophthalmology and Visual Sciences, The Chinese University of Hong Kong, Hong Kong, PR China
| | - Sayantan Biswas
- Department of Ophthalmology and Visual Sciences, The Chinese University of Hong Kong, Hong Kong, PR China
| | - Xu Cao
- Department of Ophthalmology and Visual Sciences, The Chinese University of Hong Kong, Hong Kong, PR China
| | - Ying Chau
- Department of Chemical and Biological Engineering, The Hong Kong University of Science and Technology, Hong Kong, PR China
| | - Christopher K S Leung
- Department of Ophthalmology and Visual Sciences, The Chinese University of Hong Kong, Hong Kong, PR China; Department of Chemical and Biological Engineering, The Hong Kong University of Science and Technology, Hong Kong, PR China.
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Tobias P, Philipp SI, Stylianos M, Martin B, Barbara W, Felix R, Alexander OG, Eberhart Z, Marius U, Birgit K, Sven K, Ulrich BSK, Dominik FM, Bartz-Schmidt KU, Bolz S, Fischer D, Kohl S, Kühlewein L, Mühlfriedel R, Neubauer J, Ochakovski A, Paquet-Durand F, Seeliger M, Sothilingam V, Ueffing M, Weisschuh N, Wissinger B, Zhour A, Zobor D, Zrenner E, Biel M, Michalakis S, Schön C, Kahle N, Peters T, Wilhelm B, Tsang S, Glöckner CJ. Safety and Toxicology of Ocular Gene Therapy with Recombinant AAV Vector rAAV.hCNGA3 in Nonhuman Primates. HUM GENE THER CL DEV 2019; 30:50-56. [DOI: 10.1089/humc.2018.188] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Affiliation(s)
- Peters Tobias
- University Eye Hospital Tübingen, University of Tübingen, Tübingen, Germany
- STZ Eyetrial, University of Tübingen, Tübingen, Germany
| | | | - Michalakis Stylianos
- Center for Integrated Protein Science Munich, Department of Pharmacy – Center for Drug Research, Ludwig Maximilian University of Munich, Munich, Germany
| | - Biel Martin
- Center for Integrated Protein Science Munich, Department of Pharmacy – Center for Drug Research, Ludwig Maximilian University of Munich, Munich, Germany
| | | | - Reichel Felix
- University Eye Hospital Tübingen, University of Tübingen, Tübingen, Germany
| | | | - Zrenner Eberhart
- Werner Reichardt Centre for Integrative Neuroscience, University of Tübingen, Tübingen, Germany
- Institute for Ophthalmic Research, Centre for Ophthalmology, University of Tübingen, Tübingen, Germany
| | - Ueffing Marius
- Institute for Ophthalmic Research, Centre for Ophthalmology, University of Tübingen, Tübingen, Germany
| | | | - Korte Sven
- Covance Preclinical Services GmbH, Münster, Germany
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Palmhof M, Frank V, Rappard P, Kortenhorn E, Demuth J, Biert N, Stute G, Dick HB, Joachim SC. From Ganglion Cell to Photoreceptor Layer: Timeline of Deterioration in a Rat Ischemia/Reperfusion Model. Front Cell Neurosci 2019; 13:174. [PMID: 31133806 PMCID: PMC6524469 DOI: 10.3389/fncel.2019.00174] [Citation(s) in RCA: 44] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2018] [Accepted: 04/11/2019] [Indexed: 12/12/2022] Open
Abstract
Neuronal damage and impaired vision in different retinal disorders are induced, among other factors, by ischemia/reperfusion (I/R). Since the mechanisms and the progression of ischemic injury are still not completely clarified, a timeline of this retinal degeneration is needed. In this study, we investigated protein and mRNA alterations at 2, 6, 12, and 24 h as well as 3 and 7 days after ischemia to determine the course of an ischemic insult through the whole retina. Moreover, functional analyses were performed at later stages. We detected a significant functional loss of cells in the inner nuclear layer and photoreceptors at 3 and 7 days. Additionally, the thickness of the whole retina was decreased at these points in time, indicating a severe degradation of all retinal layers. Immunohistological and qRT-PCR analyses of retinal ganglion cells (RGCs), glial cells, AII amacrine, cone and rod bipolar as well as cone and rod photoreceptor cells confirmed this first assumption. Our results show that all investigated cell types were damaged by ischemia induction. Especially RGCs, cone bipolar cells, and photoreceptor cones are very sensitive to I/R. These cells were lost shortly after ischemia induction with a progressive course up to 7 days. In addition, Müller cell gliosis was observed over the entire period of time. These results provide evidence, that I/R induces damage of the whole retina at early stages and increases over time. In conclusion, our study could demonstrate the intense impact of an ischemic injury. The ischemic defect spreads across the whole retina right up to the outer layers in the long-term and thus seems to impair the visual perception already during the stimulus processing. In addition, our findings indicate that the cone pathway seems to be particularly affected by this damage.
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Affiliation(s)
- Marina Palmhof
- Experimental Eye Research, University Eye Hospital, Ruhr-University Bochum, Bochum, Germany
| | - Viktoria Frank
- Experimental Eye Research, University Eye Hospital, Ruhr-University Bochum, Bochum, Germany
| | - Pascal Rappard
- Experimental Eye Research, University Eye Hospital, Ruhr-University Bochum, Bochum, Germany
| | - Emely Kortenhorn
- Experimental Eye Research, University Eye Hospital, Ruhr-University Bochum, Bochum, Germany
| | - Julia Demuth
- Experimental Eye Research, University Eye Hospital, Ruhr-University Bochum, Bochum, Germany
| | - Nora Biert
- Experimental Eye Research, University Eye Hospital, Ruhr-University Bochum, Bochum, Germany
| | - Gesa Stute
- Experimental Eye Research, University Eye Hospital, Ruhr-University Bochum, Bochum, Germany
| | - H Burkhard Dick
- Experimental Eye Research, University Eye Hospital, Ruhr-University Bochum, Bochum, Germany
| | - Stephanie C Joachim
- Experimental Eye Research, University Eye Hospital, Ruhr-University Bochum, Bochum, Germany
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45
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Huang D, Chen YS, Green CR, Rupenthal ID. Hyaluronic acid coated albumin nanoparticles for targeted peptide delivery in the treatment of retinal ischaemia. Biomaterials 2018; 168:10-23. [DOI: 10.1016/j.biomaterials.2018.03.034] [Citation(s) in RCA: 47] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2018] [Revised: 03/15/2018] [Accepted: 03/18/2018] [Indexed: 12/19/2022]
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Fewer Functional Deficits and Reduced Cell Death after Ranibizumab Treatment in a Retinal Ischemia Model. Int J Mol Sci 2018; 19:ijms19061636. [PMID: 29857531 PMCID: PMC6032266 DOI: 10.3390/ijms19061636] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2018] [Accepted: 05/22/2018] [Indexed: 12/25/2022] Open
Abstract
Retinal ischemia is an important factor in several eye disorders. To investigate the impact of VEGF inhibitors, as a therapeutic option, we studied these in a retinal ischemia animal model. Therefore, animals received bevacizumab or ranibizumab intravitreally one day after ischemia induction. Via electroretinography, a significant decrease in a- and b-wave amplitudes was detected fourteen days after ischemia, but they were reduced to a lesser extent in the ranibizumab group. Ischemic and bevacizumab retinae displayed fewer retinal ganglion cells (RGCs), while no significant cell loss was noted in the ranibizumab group. Apoptosis was reduced after therapy. More autophagocytotic cells were observed in ischemic and bevacizumab eyes, but not in ranibizumab eyes. Additionally, more microglia, as well as active ones, were revealed in all ischemic groups, but the increase was less prominent under ranibizumab treatment. Fewer cone bipolar cells were detected in ischemic eyes, in contrast to bevacizumab and ranibizumab-treated ones. Our results demonstrate a reduced apoptosis and autophagocytosis rate after ranibizumab treatment. Furthermore, a certain protection was seen regarding functionality, RGC, and bipolar cell availability, as well as microglia activation by ranibizumab treatment after ischemic damage. Thus, ranibizumab could be an option for treatment of retinal ischemic injury.
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47
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Kim BJ, Zack DJ. The Role of c-Jun N-Terminal Kinase (JNK) in Retinal Degeneration and Vision Loss. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2018; 1074:351-357. [PMID: 29721963 DOI: 10.1007/978-3-319-75402-4_43] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
c-Jun N-terminal kinase (JNK), a member of stress-induced mitogen-activated protein (MAP) kinase family, has been shown to modulate a variety of biological processes associated with neurodegenerative pathology of the retina. In particular, various retinal cell culture and animal models related to glaucoma, age-related macular degeneration (AMD), and retinitis pigmentosa indicate that JNK signaling may contribute to disease pathogenesis. This mini-review discusses the impact of JNK signaling in retinal disease, with a focus on retinal ganglion cells (RGCs), photoreceptor cells, retinal pigment epithelial (RPE) cells, and animal studies, with particular attention to modulation of JNK signaling as a potential therapeutic target for the treatment of retinal disease.
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Affiliation(s)
- Byung-Jin Kim
- The Wilmer Eye Institute, Johns Hopkins University, School of Medicine, Baltimore, MD, USA
| | - Donald J Zack
- The Wilmer Eye Institute, Johns Hopkins University, School of Medicine, Baltimore, MD, USA.
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48
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Ahmed A, Wang LL, Abdelmaksoud S, Aboelgheit A, Saeed S, Zhang CL. Minocycline modulates microglia polarization in ischemia-reperfusion model of retinal degeneration and induces neuroprotection. Sci Rep 2017; 7:14065. [PMID: 29070819 PMCID: PMC5656679 DOI: 10.1038/s41598-017-14450-5] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2016] [Accepted: 10/11/2017] [Indexed: 12/21/2022] Open
Abstract
Retinal ischemia-reperfusion (IR) injury causes irreversible loss of neurons and ultimately leads to permanent visual impairment and blindness. The cellular response under this pathological retinal condition is less clear. Using genetically modified mice, we systematically examined the behavior of microglia/macrophages after injury. We show that IR leads to activation of microglia/macrophages indicated by migration and proliferation of resident microglia and recruitment of circulating monocytes. IR-induced microglia/macrophages associate with apoptotic retinal neurons. Very interestingly, neuron loss can be mitigated by minocycline treatment. Minocycline induces Il4 expression and M2 polarization of microglia/macrophages. IL4 neutralization dampens minocycline-induced M2 polarization and neuroprotection. Given a well-established safety profile as an antibiotic, our results provide a rationale for using minocycline as a therapeutic agent for treating ischemic retinal degeneration.
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Affiliation(s)
- Amel Ahmed
- Department of Molecular Biology, University of Texas Southwestern Medical Center, Dallas, Texas, 75390, USA.,Department of Histology and Cell Biology, Faculty of Medicine, Assiut University, Assiut, Egypt
| | - Lei-Lei Wang
- Department of Molecular Biology, University of Texas Southwestern Medical Center, Dallas, Texas, 75390, USA.,Hamon Center for Regenerative Science and Medicine, University of Texas Southwestern Medical Center, Dallas, Texas, 75390, USA
| | - Safaa Abdelmaksoud
- Department of Histology and Cell Biology, Faculty of Medicine, Assiut University, Assiut, Egypt
| | - Amal Aboelgheit
- Department of Histology and Cell Biology, Faculty of Medicine, Assiut University, Assiut, Egypt
| | - Safaa Saeed
- Department of Histology and Cell Biology, Faculty of Medicine, Assiut University, Assiut, Egypt
| | - Chun-Li Zhang
- Department of Molecular Biology, University of Texas Southwestern Medical Center, Dallas, Texas, 75390, USA. .,Hamon Center for Regenerative Science and Medicine, University of Texas Southwestern Medical Center, Dallas, Texas, 75390, USA.
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49
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Lopez NN, Patel GC, Raychaudhuri U, Aryal S, Phan TN, Clark AF, Millar JC. Anterior chamber perfusion versus posterior chamber perfusion does not influence measurement of aqueous outflow facility in living mice by constant flow infusion. Exp Eye Res 2017; 164:95-108. [PMID: 28822760 DOI: 10.1016/j.exer.2017.08.011] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2017] [Revised: 07/13/2017] [Accepted: 08/14/2017] [Indexed: 11/25/2022]
Abstract
Mice are now routinely utilized in studies of aqueous humor outflow dynamics. In particular, conventional aqueous outflow facility (C) is routinely measured via perfusion of the aqueous chamber by a number of laboratories. However, in mouse eyes perfused ex-vivo, values for C are variable depending upon whether the perfusate is introduced into the posterior chamber (PC) versus the anterior chamber (AC). Perfusion via the AC leads to posterior bowing of the iris, and traction on the iris root/scleral spur, which may increase C. Perfusion via the PC does not yield this effect. But the equivalent situation in living mice has not been investigated. We sought to determine whether AC versus PC perfusion of the living mouse eye may lead to different values for C. All experiments were conducted in C57BL/6J mice (all ♀) between the ages of 20 and 30 weeks. Mice were divided into groups of 3-4 animals each. In all groups, both eyes were perfused. C was measured in groups 1 and 2 by constant flow infusion (from a 50 μL microsyringe) via needle placement in the AC, and in the PC, respectively. To investigate the effect of ciliary muscle (CM) tone on C, groups 3 and 4 were perfused live via the AC or PC with tropicamide (muscarinic receptor antagonist) added to the perfusate at a concentration of 100 μM. To investigate immediate effect of euthanasia, groups 5 and 6 were perfused 15-30 min after death via the AC or PC. To investigate the effect of CM tone on C immediately following euthanasia, groups 7 and 8 were perfused 15-30 min after death via the AC or PC with tropicamide added to the perfusate at a concentration of 100 μM. C in Groups 1 (AC perfusion) and 2 (PC perfusion) was computed to be 19.5 ± 0.8 versus 21.0 ± 2.1 nL/min/mmHg, respectively (mean ± SEM, p > 0.4, not significantly different). In live animals in which tropicamide was present in the perfusate, C in Group 3 (AC perfusion) was significantly greater than C in Group 4 (PC perfusion) (22.0 ± 4.0 versus 14.0 ± 2.0 nL/min/mmHg, respectively, p = 0.0021). In animals immediately following death, C in groups 5 (AC perfusion) and 6 (PC perfusion) was computed to be 21.2 ± 2.0 versus 22.8 ± 1.4 nL/min/mmHg, respectively (mean ± SEM, p = 0.1196, not significantly different). In dead animals in which tropicamide was present in the perfusate, C in group 7 (AC perfusion) was greater than C in group 8 (PC perfusion) (20.6 ± 1.4 versus 14.2 ± 2.6 nL/min/mmHg, respectively, p < 0.0001). C in eyes in situ in living mice or euthanized animals within 15-30 min post mortem is not significantly different when measured via AC perfusion or PC perfusion. In eyes of live or freshly euthanized mice, C is greater when measured via AC versus PC perfusion when tropicamide (a mydriatic and cycloplegic agent) is present in the perfusate.
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Affiliation(s)
- Navita N Lopez
- North Texas Eye Research Institute (NTERI), University of North Texas Health Science Center (UNTHSC), 3500 Camp Bowie Boulevard, Fort Worth, TX 76107, USA
| | - Gaurang C Patel
- North Texas Eye Research Institute (NTERI), University of North Texas Health Science Center (UNTHSC), 3500 Camp Bowie Boulevard, Fort Worth, TX 76107, USA
| | - Urmimala Raychaudhuri
- North Texas Eye Research Institute (NTERI), University of North Texas Health Science Center (UNTHSC), 3500 Camp Bowie Boulevard, Fort Worth, TX 76107, USA
| | - Subhash Aryal
- Department of Biostatistics and Epidemiology, University of North Texas Health Science Center (UNTHSC), 3500 Camp Bowie Boulevard, Fort Worth, TX 76107, USA
| | - Tien N Phan
- North Texas Eye Research Institute (NTERI), University of North Texas Health Science Center (UNTHSC), 3500 Camp Bowie Boulevard, Fort Worth, TX 76107, USA
| | - Abbot F Clark
- North Texas Eye Research Institute (NTERI), University of North Texas Health Science Center (UNTHSC), 3500 Camp Bowie Boulevard, Fort Worth, TX 76107, USA
| | - J Cameron Millar
- North Texas Eye Research Institute (NTERI), University of North Texas Health Science Center (UNTHSC), 3500 Camp Bowie Boulevard, Fort Worth, TX 76107, USA.
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50
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Antony BJ, Kim BJ, Lang A, Carass A, Prince JL, Zack DJ. Automated segmentation of mouse OCT volumes (ASiMOV): Validation & clinical study of a light damage model. PLoS One 2017; 12:e0181059. [PMID: 28817571 PMCID: PMC5560565 DOI: 10.1371/journal.pone.0181059] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2016] [Accepted: 06/26/2017] [Indexed: 12/16/2022] Open
Abstract
The use of spectral-domain optical coherence tomography (SD-OCT) is becoming commonplace for the in vivo longitudinal study of murine models of ophthalmic disease. Longitudinal studies, however, generate large quantities of data, the manual analysis of which is very challenging due to the time-consuming nature of generating delineations. Thus, it is of importance that automated algorithms be developed to facilitate accurate and timely analysis of these large datasets. Furthermore, as the models target a variety of diseases, the associated structural changes can also be extremely disparate. For instance, in the light damage (LD) model, which is frequently used to study photoreceptor degeneration, the outer retina appears dramatically different from the normal retina. To address these concerns, we have developed a flexible graph-based algorithm for the automated segmentation of mouse OCT volumes (ASiMOV). This approach incorporates a machine-learning component that can be easily trained for different disease models. To validate ASiMOV, the automated results were compared to manual delineations obtained from three raters on healthy and BALB/cJ mice post LD. It was also used to study a longitudinal LD model, where five control and five LD mice were imaged at four timepoints post LD. The total retinal thickness and the outer retina (comprising the outer nuclear layer, and inner and outer segments of the photoreceptors) were unchanged the day after the LD, but subsequently thinned significantly (p < 0.01). The retinal nerve fiber-ganglion cell complex and the inner plexiform layers, however, remained unchanged for the duration of the study.
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Affiliation(s)
- Bhavna Josephine Antony
- Electrical and Computer Engineering, Johns Hopkins University, Baltimore MD 21218 United States of America
| | - Byung-Jin Kim
- Wilmer Eye Institute, Johns Hopkins University School of Medicine, Baltimore MD 21287 United States of America
| | - Andrew Lang
- Electrical and Computer Engineering, Johns Hopkins University, Baltimore MD 21218 United States of America
| | - Aaron Carass
- Electrical and Computer Engineering, Johns Hopkins University, Baltimore MD 21218 United States of America
| | - Jerry L. Prince
- Electrical and Computer Engineering, Johns Hopkins University, Baltimore MD 21218 United States of America
| | - Donald J. Zack
- Wilmer Eye Institute, Johns Hopkins University School of Medicine, Baltimore MD 21287 United States of America
- Department of Neuroscience, The Johns Hopkins University School of Medicine, Baltimore, MD 21287 United States of America
- Department of Molecular Biology and Genetics, The Johns Hopkins University School of Medicine, Baltimore, MD 21287 United States of America
- Institute of Genetic Medicine, The Johns Hopkins University School of Medicine, Baltimore, MD 21287 United States of America
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