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Liang YC, Jia MJ, Li L, Liu DL, Chu SF, Li HL. Association of circulating inflammatory proteins with type 2 diabetes mellitus and its complications: a bidirectional Mendelian randomization study. Front Endocrinol (Lausanne) 2024; 15:1358311. [PMID: 38606083 PMCID: PMC11007105 DOI: 10.3389/fendo.2024.1358311] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/05/2024] [Accepted: 03/12/2024] [Indexed: 04/13/2024] Open
Abstract
Background Increasing evidence indicates that immune response underlies the pathology of type 2 diabetes (T2D). Nevertheless, the specific inflammatory regulators involved in this pathogenesis remain unclear. Methods We systematically explored circulating inflammatory proteins that are causally associated with T2D via a bidirectional Mendelian randomization (MR) study and further investigated them in prevalent complications of T2D. Genetic instruments for 91 circulating inflammatory proteins were derived from a genome-wide association study (GWAS) that enrolled 14,824 predominantly European participants. Regarding the summary-level GWASs of type 2 diabetes, we adopted the largest meta-analysis of European population (74,124 cases vs. 824,006 controls) and a prospective nested case-cohort study in Europe (9,978 cases vs. 12,348 controls). Summary statistics for five complications of T2D were acquired from the FinnGen R9 repository. The inverse variance-weighted method was applied as the primary method for causal inference. MR-Egger, weighted median and maximum likelihood methods were employed as supplementary analyses. Results from the two T2D studies were combined in a meta-analysis. Sensitivity analyses and phenotype-wide association studies (PheWAS) were performed to detect heterogeneity and potential horizontal pleiotropy in the study. Results Genetic evidence indicated that elevated levels of TGF-α (OR = 1.16, 95% CI = 1.15-1.17) and CX3CL1 (OR = 1.30, 95% CI = 1.04-1.63) promoted the occurrence of T2D, and increased concentrations of FGF-21 (OR = 0.87, 95% CI = 0.81-0.93) and hGDNF (OR = 0.96, 95% CI = 0.95-0.98) mitigated the risk of developing T2D, while type 2 diabetes did not exert a significant influence on said proteins. Elevated levels of TGF-α were associated with an increased risk of ketoacidosis, neurological complications, and ocular complications in patients with T2D, and increased concentrations of FGF-21 were potentially correlated with a diminished risk of T2D with neurological complications. Higher levels of hGDNF were associated with an increased risk of T2D with peripheral vascular complications, while CX3CL1 did not demonstrate a significant association with T2D complications. Sensitivity analyses and PheWAS further ensure the robustness of our findings. Conclusion This study determined four circulating inflammatory proteins that affected the occurrence of T2D, providing opportunities for the early prevention and innovative therapy of type 2 diabetes and its complications.
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Affiliation(s)
- Ying-Chao Liang
- The Fourth Clinical Medical College of Guangzhou University of Chinese Medicine, Shenzhen, Guangdong, China
| | - Ming-Jie Jia
- The Fourth Clinical Medical College of Guangzhou University of Chinese Medicine, Shenzhen, Guangdong, China
| | - Ling Li
- The Fourth Clinical Medical College of Guangzhou University of Chinese Medicine, Shenzhen, Guangdong, China
| | - De-Liang Liu
- Department of Endocrinology, Shenzhen Traditional Chinese Medicine Hospital, Shenzhen, Guangdong, China
| | - Shu-Fang Chu
- Department of Endocrinology, Shenzhen Traditional Chinese Medicine Hospital, Shenzhen, Guangdong, China
| | - Hui-Lin Li
- Department of Endocrinology, Shenzhen Traditional Chinese Medicine Hospital, Shenzhen, Guangdong, China
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Liu Y, Wang X, Sheng Y, Jin H, Han L, Xu J, Fu Q, Liu J, Ji F, Ding H, Xu X, Wu K, Zhang P, Wang G. Recurrence of macular edema in patients with branch retinal vein occlusion: a proteomic study. BMC Ophthalmol 2024; 24:82. [PMID: 38388341 PMCID: PMC10882909 DOI: 10.1186/s12886-024-03359-z] [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: 12/28/2023] [Accepted: 02/18/2024] [Indexed: 02/24/2024] Open
Abstract
BACKGROUND Branch retinal vein occlusion (BRVO) is a common retinal vascular disease leading to severe vision loss and blindness. This study aimed to investigate and reveal the pathophysiological mechanisms underlying macular edema (ME) recurrence in patients with BRVO through a proteomic approach. METHODS We detected proteins in the aqueous humor of 14 untreated, four refractory, and four post-operative patients with BRVO-ME and 12 age-matched cataract controls using four-dimensional label-free proteomic and bioinformatics analyses. RESULTS In total, 84 proteins exhibited significant differential expression between the BRVO and control samples (fold change [FC] ≥ 1.2 and adjusted p-value < 0.05). Compared to the control group, 43 and 41 proteins were upregulated and downregulated, respectively, in the BRVO group. These proteins were involved in cell adhesion, visual perception, retina homeostasis, and platelet activation. Several significantly enriched signaling pathways included complement and coagulation cascades and platelet activation. In the protein-protein interaction networks generated using the search tool for retrieval of interacting genes (STRING), the fibrinogen alpha chain and fibrinogen beta chain constituted a tightly connected cluster. Many common protein expression trends, such as the fibrinogen alpha chain and fibrinogen beta chain, were observed in both the recurrent and refractory groups. Differentially expressed proteins in the two groups were involved in complement activation, acute-phase response, platelet activation, and platelet aggregation. Important signaling pathways include the complement and coagulation cascades, and platelet activation. Protein-protein interaction analysis suggested that the fibrinogen alpha chain and fibrinogen beta chain constituted a tightly connected cluster. The expression of some differentially expressed proteins shared by the BRVO and the recurrent and refractory groups was reversed in the post-operative group. CONCLUSIONS Our study is the first to analyze the proteomics of recurrent, refractory, and post-operative groups treated for BRVO-ME, and may potentially provide novel therapeutic interventions for the recurrence of ME.
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Affiliation(s)
- Yin Liu
- Wuhu Eye Hospital, No. 378, Santan Road, Yijiang District, Wuhu, Anhui Province, 241000, China
| | - Xiaohu Wang
- Wuhu Eye Hospital, No. 378, Santan Road, Yijiang District, Wuhu, Anhui Province, 241000, China
| | - Yonghong Sheng
- Wuhu Eye Hospital, No. 378, Santan Road, Yijiang District, Wuhu, Anhui Province, 241000, China
| | - Haili Jin
- Wuhu Eye Hospital, No. 378, Santan Road, Yijiang District, Wuhu, Anhui Province, 241000, China
| | - Linfeng Han
- Wuhu Eye Hospital, No. 378, Santan Road, Yijiang District, Wuhu, Anhui Province, 241000, China
| | - Jun Xu
- Wuhu Eye Hospital, No. 378, Santan Road, Yijiang District, Wuhu, Anhui Province, 241000, China
| | - Qingqing Fu
- Wuhu Eye Hospital, No. 378, Santan Road, Yijiang District, Wuhu, Anhui Province, 241000, China
| | - Jing Liu
- Wuhu Eye Hospital, No. 378, Santan Road, Yijiang District, Wuhu, Anhui Province, 241000, China
| | - Feng Ji
- Wuhu Eye Hospital, No. 378, Santan Road, Yijiang District, Wuhu, Anhui Province, 241000, China
| | - He Ding
- Wuhu Eye Hospital, No. 378, Santan Road, Yijiang District, Wuhu, Anhui Province, 241000, China
| | - Xiaochen Xu
- Wuhu Eye Hospital, No. 378, Santan Road, Yijiang District, Wuhu, Anhui Province, 241000, China
| | - KunChao Wu
- Department of Ophthalmology, First People's Hospital of Guiyang, Guiyang, China.
| | - Pengfei Zhang
- Department of Ophthalmology, The First Affiliated Hospital of Wannan Medical College (Yijishan Hospital of Wannan Medical College), Wuhu, China.
| | - Guoping Wang
- Wuhu Eye Hospital, No. 378, Santan Road, Yijiang District, Wuhu, Anhui Province, 241000, China.
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Geng Z, Tan J, Xu J, Chen Q, Gu P, Dai X, Kuang X, Ji S, Liu T, Li C. ADAMTS5 promotes neovascularization via autophagic degradation of PEDF in proliferative diabetic retinopathy. Exp Eye Res 2023; 234:109597. [PMID: 37490993 DOI: 10.1016/j.exer.2023.109597] [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: 04/17/2023] [Revised: 07/04/2023] [Accepted: 07/18/2023] [Indexed: 07/27/2023]
Abstract
Proliferative diabetic retinopathy (PDR) adversely affects visual function. Extracellular matrix proteins (ECM) contribute significantly to the development of PDR. A Disintegrin and Metalloproteinase with Thrombospondin motifs 5 (ADAMTS5) is a member of ECM proteins. ADAMTS5 participates in angiogenesis and inflammation in diverse diseases. However, the role of ADAMTS5 in PDR remains elusive. Multiplex beam array technology was used to analyze vitreous humor of PDR patients and normal people. ELISA and Western blot were used to detect the expression of ADAMTS5, PEDF and autophagy related factors. Immunofluorescence assay was used to mark the expression and localization of ADAMTS5 and PEDF. The neovascularization was detected by tube formation test. Our results revealed that ADAMTS5 expression was increased in the vitreous humor of PDR patients and oxygen-induced retinopathy (OIR) mice retinas. Inhibiting ADAMTS5 alleviated pathological angiogenesis and upregulated PEDF expression in the OIR mice. In addition, ADAMTS5 inhibited PEDF secretion in ARPE-19 cells in vitro studies, thereby inhibiting the migration of HMEC-1. Mechanically, ADAMTS5 promoted the autophagic degradation of PEDF. Collectively, inhibition of ADAMTS5 during OIR suppresses pathological angiogenesis. Our study provides a new approach for resolving pathological angiogenesis in PDR.
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Affiliation(s)
- Zhao Geng
- Department of Ophthalmology, Daping Hospital, Army Medical University, Chongqing, China
| | - Jun Tan
- Department of Ophthalmology, Daping Hospital, Army Medical University, Chongqing, China
| | - Jie Xu
- Department of Ophthalmology, Daping Hospital, Army Medical University, Chongqing, China
| | - Qifang Chen
- Department of Ophthalmology, Daping Hospital, Army Medical University, Chongqing, China
| | - Peilin Gu
- Department of Ophthalmology, Daping Hospital, Army Medical University, Chongqing, China
| | - Xiaoyan Dai
- Cancer Center, Daping Hospital, Army Medical University, Chongqing, China
| | - Xunjie Kuang
- Cancer Center, Daping Hospital, Army Medical University, Chongqing, China
| | - Shuxing Ji
- Department of Ophthalmology, Daping Hospital, Army Medical University, Chongqing, China
| | - Ting Liu
- Department of Ophthalmology, Daping Hospital, Army Medical University, Chongqing, China.
| | - Chongyi Li
- Department of Ophthalmology, Daping Hospital, Army Medical University, Chongqing, China.
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Zhang Q, Guo Y, Kang M, Lin WH, Wu JC, Yu Y, Li LC, Sang A. p21CIP/WAF1 saRNA inhibits proliferative vitreoretinopathy in a rabbit model. PLoS One 2023; 18:e0282063. [PMID: 36821623 PMCID: PMC9949646 DOI: 10.1371/journal.pone.0282063] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2022] [Accepted: 02/07/2023] [Indexed: 02/24/2023] Open
Abstract
PURPOSE Proliferative vitreoretinopathy (PVR) is a disease process resulting from proliferation of retinal pigment epithelial (RPE) cells in the vitreous and periretinal area, leading to periretinal membrane formation and traction and eventually to postoperative failure after vitreo-retinal surgery for primary rhegmatogenous retinal detachment (RRD). The present study was designed to test the therapeutic potential of a p21CIP/WAF1 (p21) inducing saRNA for PVR. METHODS A chemically modified p21 saRNA (RAG1-40-53) was tested in cultured human RPE cells for p21 induction and for the inhibition of cell proliferation, migration and cell cycle progression. RAG1-40-53 was further conjugated to a cholesterol moiety and tested for pharmacokinetics and pharmacodynamics in rabbit eyes and for therapeutic effects after intravitreal administration in a rabbit PVR model established by injecting human RPE cells. RESULTS RAG1-40-53 (0.3 mg, 1 mg) significantly induced p21 expression in RPE cells and inhibited cell proliferation, the progression of cell cycle at the G0/G1 phase and TGF-β1 induced migration. After a single intravitreal injection into rabbit eyes, cholesterol-conjugated RAG1-40-53 exhibited sustained concentration in the vitreal humor beyond at least 8 days and prevented the progression of established PVR. CONCLUSION p21 saRNA could represent a novel therapeutics for PVR by exerting a antiproliferation and antimigration effect on RPE cells.
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Affiliation(s)
- Qi Zhang
- Department of Ophthalmology, Affiliated Hospital and Medical School of Nantong University, Nantong City, Jiangsu Province, China
- Dalian Medical University, Lvshunkou District, Dalian City, Liaoning Province, China
| | - Yangchen Guo
- Department of Ophthalmology, Affiliated Hospital and Medical School of Nantong University, Nantong City, Jiangsu Province, China
- Nantong University, Nantong City, Jiangsu Province, China
| | - Moorim Kang
- Ractigen Therapeutics, Nantong City, Jiangsu Province, China
| | - Wei-Hsiang Lin
- Ractigen Therapeutics, Nantong City, Jiangsu Province, China
| | - Jian-Cheng Wu
- Ractigen Therapeutics, Nantong City, Jiangsu Province, China
| | - Ying Yu
- Department of Ophthalmology, Affiliated Hospital and Medical School of Nantong University, Nantong City, Jiangsu Province, China
- * E-mail: (LCL); (YY); (AS)
| | - Long-Cheng Li
- Ractigen Therapeutics, Nantong City, Jiangsu Province, China
- Institute of Reproductive Medicine, Nantong University, Nantong City, Jiangsu Province, China
- * E-mail: (LCL); (YY); (AS)
| | - Aimin Sang
- Department of Ophthalmology, Affiliated Hospital and Medical School of Nantong University, Nantong City, Jiangsu Province, China
- * E-mail: (LCL); (YY); (AS)
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Santos FM, Ciordia S, Mesquita J, Cruz C, Sousa JPCE, Passarinha LA, Tomaz CT, Paradela A. Proteomics profiling of vitreous humor reveals complement and coagulation components, adhesion factors, and neurodegeneration markers as discriminatory biomarkers of vitreoretinal eye diseases. Front Immunol 2023; 14:1107295. [PMID: 36875133 PMCID: PMC9978817 DOI: 10.3389/fimmu.2023.1107295] [Citation(s) in RCA: 13] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2022] [Accepted: 02/01/2023] [Indexed: 02/18/2023] Open
Abstract
Introduction Diabetic retinopathy (DR) and age-related macular degeneration (AMD) are leading causes of visual impairment and blindness in people aged 50 years or older in middle-income and industrialized countries. Anti-VEGF therapies have improved the management of neovascular AMD (nAMD) and proliferative DR (PDR), no treatment options exist for the highly prevalent dry form of AMD. Methods To unravel the biological processes underlying these pathologies and to find new potential biomarkers, a label-free quantitative (LFQ) method was applied to analyze the vitreous proteome in PDR (n=4), AMD (n=4) compared to idiopathic epiretinal membranes (ERM) (n=4). Results and discussion Post-hoc tests revealed 96 proteins capable of differentiating among the different groups, whereas 118 proteins were found differentially regulated in PDR compared to ERM and 95 proteins in PDR compared to dry AMD. Pathway analysis indicates that mediators of complement, coagulation cascades and acute phase responses are enriched in PDR vitreous, whilst proteins highly correlated to the extracellular matrix (ECM) organization, platelet degranulation, lysosomal degradation, cell adhesion, and central nervous system development were found underexpressed. According to these results, 35 proteins were selected and monitored by MRM (multiple reaction monitoring) in a larger cohort of patients with ERM (n=21), DR/PDR (n=20), AMD (n=11), and retinal detachment (n=13). Of these, 26 proteins could differentiate between these vitreoretinal diseases. Based on Partial least squares discriminant and multivariate exploratory receiver operating characteristic (ROC) analyses, a panel of 15 discriminatory biomarkers was defined, which includes complement and coagulation components (complement C2 and prothrombin), acute-phase mediators (alpha-1-antichymotrypsin), adhesion molecules (e.g., myocilin, galectin-3-binding protein), ECM components (opticin), and neurodegeneration biomarkers (beta-amyloid, amyloid-like protein 2).
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Affiliation(s)
- Fátima M. Santos
- CICS-UBI – Health Sciences Research Centre, University of Beira Interior, Covilhã, Portugal
- Functional Proteomics Laboratory, Centro Nacional de Biotecnología, CSIC, Madrid, Spain
| | - Sergio Ciordia
- Functional Proteomics Laboratory, Centro Nacional de Biotecnología, CSIC, Madrid, Spain
| | - Joana Mesquita
- CICS-UBI – Health Sciences Research Centre, University of Beira Interior, Covilhã, Portugal
| | - Carla Cruz
- CICS-UBI – Health Sciences Research Centre, University of Beira Interior, Covilhã, Portugal
- Chemistry Department, Faculty of Sciences, University of Beira Interior, Covilhã, Portugal
| | - João Paulo Castro e Sousa
- CICS-UBI – Health Sciences Research Centre, University of Beira Interior, Covilhã, Portugal
- Department of Ophthalmology, Centro Hospitalar de Leiria, Leiria, Portugal
| | - Luís A. Passarinha
- CICS-UBI – Health Sciences Research Centre, University of Beira Interior, Covilhã, Portugal
- Associate Laboratory i4HB - Institute for Health and Bioeconomy, Faculdade de Ciências e Tecnologia, Universidade NOVA, Caparica, Portugal
- UCIBIO–Applied Molecular Biosciences Unit, Departamento de Química/Departamento Ciências da Vida, Faculdade de Ciências e Tecnologia, Universidade NOVA de Lisboa, Caparica, Portugal
- Laboratório de Fármaco-Toxicologia, UBIMedical, Universidade da Beira Interior, Covilhã, Portugal
| | - Cândida T. Tomaz
- CICS-UBI – Health Sciences Research Centre, University of Beira Interior, Covilhã, Portugal
- Chemistry Department, Faculty of Sciences, University of Beira Interior, Covilhã, Portugal
| | - Alberto Paradela
- Functional Proteomics Laboratory, Centro Nacional de Biotecnología, CSIC, Madrid, Spain
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Dos Santos FM, Ciordia S, Mesquita J, de Sousa JPC, Paradela A, Tomaz CT, Passarinha LAP. Vitreous humor proteome: unraveling the molecular mechanisms underlying proliferative and neovascular vitreoretinal diseases. Cell Mol Life Sci 2022; 80:22. [PMID: 36585968 PMCID: PMC11072707 DOI: 10.1007/s00018-022-04670-y] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2022] [Revised: 11/09/2022] [Accepted: 12/12/2022] [Indexed: 01/01/2023]
Abstract
Proliferative diabetic retinopathy (PDR), proliferative vitreoretinopathy (PVR), and neovascular age-related macular degeneration (nAMD) are among the leading causes of blindness. Due to the multifactorial nature of these vitreoretinal diseases, omics approaches are essential for a deeper understanding of the pathophysiologic processes underlying the evolution to a proliferative or neovascular etiology, in which patients suffer from an abrupt loss of vision. For many years, it was thought that the function of the vitreous was merely structural, supporting and protecting the surrounding ocular tissues. Proteomics studies proved that vitreous is more complex and biologically active than initially thought, and its changes reflect the physiological and pathological state of the eye. The vitreous is the scenario of a complex interplay between inflammation, fibrosis, oxidative stress, neurodegeneration, and extracellular matrix remodeling. Vitreous proteome not only reflects the pathological events that occur in the retina, but the changes in the vitreous itself play a central role in the onset and progression of vitreoretinal diseases. Therefore, this review offers an overview of the studies on the vitreous proteome that could help to elucidate some of the pathological mechanisms underlying proliferative and/or neovascular vitreoretinal diseases and to find new potential pharmaceutical targets.
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Affiliation(s)
- Fátima Milhano Dos Santos
- Health Sciences Research Centre (CICS-UBI), Universidade da Beira Interior, 6201-001, Covilhã, Portugal.
- Functional Proteomics Laboratory, Centro Nacional de Biotecnología (CNB-CSIC), Unidad de Proteomica, Calle Darwin 3, Campus de Cantoblanco, 28049, Madrid, Spain.
| | - Sergio Ciordia
- Functional Proteomics Laboratory, Centro Nacional de Biotecnología (CNB-CSIC), Unidad de Proteomica, Calle Darwin 3, Campus de Cantoblanco, 28049, Madrid, Spain
| | - Joana Mesquita
- Health Sciences Research Centre (CICS-UBI), Universidade da Beira Interior, 6201-001, Covilhã, Portugal
| | - João Paulo Castro de Sousa
- Health Sciences Research Centre (CICS-UBI), Universidade da Beira Interior, 6201-001, Covilhã, Portugal
- Department of Ophthalmology, Centro Hospitalar de Leiria, 2410-197, Leiria, Portugal
| | - Alberto Paradela
- Functional Proteomics Laboratory, Centro Nacional de Biotecnología (CNB-CSIC), Unidad de Proteomica, Calle Darwin 3, Campus de Cantoblanco, 28049, Madrid, Spain
| | - Cândida Teixeira Tomaz
- Health Sciences Research Centre (CICS-UBI), Universidade da Beira Interior, 6201-001, Covilhã, Portugal
- C4-UBI, Cloud Computing Competence Centre, University of Beira Interior, 6200-501, Covilhã, Portugal
- Chemistry Department, Faculty of Sciences, Universidade da Beira Interior, 6201-001, Covilhã, Portugal
| | - Luís António Paulino Passarinha
- Health Sciences Research Centre (CICS-UBI), Universidade da Beira Interior, 6201-001, Covilhã, Portugal.
- Associate Laboratory i4HB, Faculdade de Ciências e Tecnologia, Institute for Health and Bioeconomy, Universidade NOVA, 2819-516, Caparica, Portugal.
- UCIBIO-Applied Molecular Biosciences Unit, Departamento de Química, Faculdade de Ciências e Tecnologia, Universidade NOVA de Lisboa, 2829-516, Caparica, Portugal.
- Pharmaco-Toxicology Laboratory, UBIMedical, Universidade da Beira Interior, 6200-000, Covilhã, Portugal.
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Goldberg Z, Sher I, Qassim L, Chapman J, Rotenstreich Y, Shavit-Stein E. Intrinsic Expression of Coagulation Factors and Protease Activated Receptor 1 (PAR1) in Photoreceptors and Inner Retinal Layers. Int J Mol Sci 2022; 23:ijms23020984. [PMID: 35055169 PMCID: PMC8778890 DOI: 10.3390/ijms23020984] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2021] [Revised: 01/12/2022] [Accepted: 01/14/2022] [Indexed: 12/19/2022] Open
Abstract
The aim of this study was to characterize the distribution of the thrombin receptor, protease activated receptor 1 (PAR1), in the neuroretina. Neuroretina samples of wild-type C57BL/6J and PAR1−/− mice were processed for indirect immunofluorescence and Western blot analysis. Reverse transcription quantitative real-time PCR (RT-qPCR) was used to determine mRNA expression of coagulation Factor X (FX), prothrombin (PT), and PAR1 in the isolated neuroretina. Thrombin activity following KCl depolarization was assessed in mouse neuroretinas ex vivo. PAR1 staining was observed in the retinal ganglion cells, inner nuclear layer cells, and photoreceptors in mouse retinal cross sections by indirect immunofluorescence. PAR1 co-localized with rhodopsin in rod outer segments but was not expressed in cone outer segments. Western blot analysis confirmed PAR1 expression in the neuroretina. Factor X, prothrombin, and PAR1 mRNA expression was detected in isolated neuroretinas. Thrombin activity was elevated by nearly four-fold in mouse neuroretinas following KCl depolarization (0.012 vs. 0.044 mu/mL, p = 0.0497). The intrinsic expression of coagulation factors in the isolated neuroretina together with a functional increase in thrombin activity following KCl depolarization may suggest a role for the PAR1/thrombin pathway in retinal function.
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Affiliation(s)
- Zehavit Goldberg
- Goldschleger Eye Institute, Sheba Medical Center, Ramat Gan 5266202, Israel; (Z.G.); (I.S.); (Y.R.)
- Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv 6997801, Israel
| | - Ifat Sher
- Goldschleger Eye Institute, Sheba Medical Center, Ramat Gan 5266202, Israel; (Z.G.); (I.S.); (Y.R.)
- Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv 6997801, Israel
| | - Lamis Qassim
- Department of Neurology, Sheba Medical Center, Ramat Gan 5266202, Israel; (L.Q.); (J.C.)
- Department of Neurology and Neurosurgery, Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv 6997801, Israel
| | - Joab Chapman
- Department of Neurology, Sheba Medical Center, Ramat Gan 5266202, Israel; (L.Q.); (J.C.)
- Department of Neurology and Neurosurgery, Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv 6997801, Israel
- Department of Physiology and Pharmacology, Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv 6997801, Israel
- Robert and Martha Harden Chair in Mental and Neurological Diseases, Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv 6997801, Israel
| | - Ygal Rotenstreich
- Goldschleger Eye Institute, Sheba Medical Center, Ramat Gan 5266202, Israel; (Z.G.); (I.S.); (Y.R.)
- Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv 6997801, Israel
- Sagol School of Neuroscience, Tel Aviv University, Tel Aviv 6997801, Israel
| | - Efrat Shavit-Stein
- Department of Neurology, Sheba Medical Center, Ramat Gan 5266202, Israel; (L.Q.); (J.C.)
- Department of Neurology and Neurosurgery, Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv 6997801, Israel
- Correspondence: ; Fax: +972-3-530-4409
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Han H, Zhao X, Liao M, Song Y, You C, Dong X, Yang X, Wang X, Huang B, Du M, Yan H. Activated Blood Coagulation Factor X (FXa) Contributes to the Development of Traumatic PVR Through Promoting RPE Epithelial-Mesenchymal Transition. Invest Ophthalmol Vis Sci 2021; 62:29. [PMID: 34283209 PMCID: PMC8300057 DOI: 10.1167/iovs.62.9.29] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023] Open
Abstract
Purpose Uncontrolled coagulation reactions contribute to pathological fibroproliferation in several organs, and yet their role in proliferative vitreoretinopathy (PVR) remains to be elucidated. In this study, we evaluated the profibrotic effects of FXa in RPE cells and in a mouse model of PVR. Methods FXa levels in the eyes of traumatic PVR patients and rabbit models of mechanical ocular trauma was measured by ELISA and immunohistochemistry. FXa-induced RPE EMT was assessed by examining cell proliferation, migration, tight junction changes, and expression of fibrotic markers. For in vivo study, FXa was injected into dispase-injured eyes, then intraocular fibrosis was evaluated by histological analysis and Western blotting. The therapeutic effect of FXa inhibitor was also examined in PVR mouse models. Results Vitreous FXa were higher in patients with traumatic PVR compared to patients with macular hole. Moreover, expressions of FXa and PAR1 were found in the epiretinal membranes from traumatic PVR patients. Vitreous FXa were markedly increased after mechanical ocular trauma in rabbits. In vitro, FXa stimulated RPE EMT characterized as ZO-1 disruption, compromised cell polarity, and increased fibronectin expressions. Co-injection of FXa and dispase in mice induced more severely damaged retinal structures, and increased α-SMA expressions than FXa or dispase treatment alone. Oral FXa or thrombin inhibitors significantly blocked intraocular fibrosis in PVR mouse models. FXa promoted phospho-activation of p38 in ARPE19 cells, which was dependent on PAR1. Moreover, TGF-βR inhibitor also significantly alleviated FXa-induced intraocular fibrosis in mice. Conclusions FXa promotes intraocular fibrosis in mice via mechanisms involving RPE activation.
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Affiliation(s)
- Han Han
- Department of Ophthalmology, Tianjin Medical University General Hospital, Tianjin, China
| | - Xiao Zhao
- Department of Ophthalmology, Tianjin Medical University General Hospital, Tianjin, China
| | - Mengyu Liao
- Department of Ophthalmology, Tianjin Medical University General Hospital, Tianjin, China
| | - Yinting Song
- Department of Ophthalmology, Tianjin Medical University General Hospital, Tianjin, China
| | - Caiyun You
- Department of Ophthalmology, Tianjin Medical University General Hospital, Tianjin, China
| | - Xue Dong
- Department of Ophthalmology, Tianjin Medical University General Hospital, Tianjin, China.,Laboratory of Molecular Ophthalmology, Department of Pharmacology and Tianjin Key Laboratory of Inflammation Biology, School of Basic Medical Sciences, Tianjin Medical University, Tianjin, China
| | - Xueli Yang
- Department of Ophthalmology, Tianjin Medical University General Hospital, Tianjin, China.,Department of Ophthalmology, The First Affiliated Hospital of Dali University, Yunnan, China
| | - Xiaohong Wang
- Laboratory of Molecular Ophthalmology, Department of Pharmacology and Tianjin Key Laboratory of Inflammation Biology, School of Basic Medical Sciences, Tianjin Medical University, Tianjin, China
| | - Bo Huang
- Department of Ophthalmology, University of Mississippi Medical Center, Jackson, Mississippi, United States
| | - Mei Du
- Laboratory of Molecular Ophthalmology, Department of Pharmacology and Tianjin Key Laboratory of Inflammation Biology, School of Basic Medical Sciences, Tianjin Medical University, Tianjin, China
| | - Hua Yan
- Department of Ophthalmology, Tianjin Medical University General Hospital, Tianjin, China
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9
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Yu M, Xie F, Liu X, Sun H, Guo Z, Liu X, Li W, Sun W, Wang Y, He C. Proteomic Study of Aqueous Humor and Its Application in the Treatment of Neovascular Glaucoma. Front Mol Biosci 2020; 7:587677. [PMID: 33195434 PMCID: PMC7580691 DOI: 10.3389/fmolb.2020.587677] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2020] [Accepted: 09/07/2020] [Indexed: 12/13/2022] Open
Abstract
Aqueous humor (AH) proteins are involved in many physiological and pathological processes of the eye. The proteome analysis of AH is important to understand its physiological and pathophysiological functions. In the present study, AH samples obtained from 21 cataract volunteers were pooled together. After high-pH RPLC offline separation, the pooled sample was analyzed by LC-MS/MS to provide a comprehensive profile of AH proteome. The function analysis was provided by the GO and IPA annotation. In order to determine whether the AH proteome can reflect the pathophysiological changes of the disease, DIA technology was used to analyze the AH samples obtained from three neovascular glaucoma (NVG) patients (six samples) before and after drug treatment. The differential proteins were validated by PRM technology in an independent group (14 samples). In the AH proteome database, 802 proteins were identified, and 318 proteins were identified for the first time. Furthermore, 480 proteins were quantified based on the peak intensity-based semiquantification (iBAQ), which ranged by approximately 7 orders of magnitude. These proteins are primarily involved in immunity- and inflammation-related pathways. The differential AH proteomic analysis in NVG treatment revealed that the AH proteome can reflect the pathophysiological changes of drug treatment. Angiogenesis and thrombus coagulation progression are deeply involved in NVG treatment. The present experiment provided a comprehensive AH proteome analysis and expanded the profile of human AH proteome. The differential AH proteomic analysis of NVG treatment indicated that AH proteome can reflect the pathophysiological changes in drug intervention.
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Affiliation(s)
- Mengxi Yu
- China-Japan Union Hospital of Jilin University, Changchun, China
| | - Feng Xie
- China-Japan Union Hospital of Jilin University, Changchun, China
| | - Xiang Liu
- Shanghai AB Sciex Analytical Instrument Trading Co., Ltd., Shanghai, China
| | - Haidan Sun
- Core Facility of Instrument, Institute of Basic Medical Sciences, Chinese Academy of Medical Sciences, School of Basic Medicine, Peking Union Medical College, Peking, China
| | - Zhengguang Guo
- Core Facility of Instrument, Institute of Basic Medical Sciences, Chinese Academy of Medical Sciences, School of Basic Medicine, Peking Union Medical College, Peking, China
| | - Xiaoyan Liu
- Core Facility of Instrument, Institute of Basic Medical Sciences, Chinese Academy of Medical Sciences, School of Basic Medicine, Peking Union Medical College, Peking, China
| | - Wei Li
- China-Japan Union Hospital of Jilin University, Changchun, China
| | - Wei Sun
- Core Facility of Instrument, Institute of Basic Medical Sciences, Chinese Academy of Medical Sciences, School of Basic Medicine, Peking Union Medical College, Peking, China
| | - Ying Wang
- Department of Ophthalmology, The Second Hospital of Jilin University, Changchun, China
| | - Chengyan He
- China-Japan Union Hospital of Jilin University, Changchun, China
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10
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Dan-Brezis I, Zahavi A, Axer-Siegel R, Nisgav Y, Dahbash M, Weinberger D, Ehrlich R, Livnat T. Inflammation, angiogenesis and coagulation interplay in a variety of retinal diseases. Acta Ophthalmol 2020; 98:e559-e562. [PMID: 31833198 DOI: 10.1111/aos.14331] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2019] [Accepted: 11/18/2019] [Indexed: 01/14/2023]
Abstract
PURPOSE To evaluate and correlate levels of various proteins involved in coagulation, inflammation and angiogenesis processes in the vitreous of patients with different vitreoretinal pathologies. METHODS Vitreous samples were collected from patients scheduled for pars plana vitrectomy for the treatment of rhegmatogenous retinal detachment (RRD), vitreous haemorrhage or tractional retinal detachment associated with proliferative diabetic retinopathy (PDR). Macular hole and epiretinal membrane served as controls. Levels of vascular endothelial growth factor, thrombin-antithrombin III complex, interleukin-8, tissue factor, thrombomodulin, P-selectin, D-dimer and tissue factor pathway inhibitor were compared among the vitreoretinal pathology groups. RESULTS Compared to controls, patients with PDR had significantly higher levels of thrombin-antithrombin III complex (p < 0.001), vascular endothelial growth factor (p < 0.001), D-dimer (p = 0.038) and interleukin-8 (p = 0.04), and patients with RRD group had significantly higher levels only of thrombin-antithrombin III complex (p < 0.001). There was a significant linear correlation between levels of P-selectin and D-dimer (p = 0.003), P-selectin and interleukin-8 (p < 0.001), and D-dimer and IL-8 (p = 0.007). These correlations were particularly strong in the PDR group compared to the other groups. CONCLUSION Patients with PDR manifest high coagulative and angiogenic activity in the vitreous. These pathways are highly correlated with the inflammatory cascade.
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Affiliation(s)
- Idit Dan-Brezis
- Department of Ophthalmology, Rabin Medical Center - Beilinson Hospital, Petach Tikva, Israel
| | - Alon Zahavi
- Department of Ophthalmology, Rabin Medical Center - Beilinson Hospital, Petach Tikva, Israel.,Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv, Israel
| | - Ruth Axer-Siegel
- Department of Ophthalmology, Rabin Medical Center - Beilinson Hospital, Petach Tikva, Israel.,Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv, Israel
| | - Yael Nisgav
- Laboratory of Eye Research, Felsenstein Medical Research Center, Petach Tikva, Israel
| | - Mor Dahbash
- Laboratory of Eye Research, Felsenstein Medical Research Center, Petach Tikva, Israel
| | - Dov Weinberger
- Department of Ophthalmology, Rabin Medical Center - Beilinson Hospital, Petach Tikva, Israel.,Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv, Israel.,Laboratory of Eye Research, Felsenstein Medical Research Center, Petach Tikva, Israel
| | - Rita Ehrlich
- Department of Ophthalmology, Rabin Medical Center - Beilinson Hospital, Petach Tikva, Israel.,Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv, Israel
| | - Tami Livnat
- Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv, Israel.,Laboratory of Eye Research, Felsenstein Medical Research Center, Petach Tikva, Israel.,Israeli National Hemophilia Center, Sheba Medical Center, Tel Hashomer, Israel
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11
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Aldebert G, Faillie JL, Hillaire-Buys D, Mura T, Carrière I, Delcourt C, Creuzot-Garcher C, Villain M, Daien V. Association of Anticholinergic Drug Use With Risk for Late Age-Related Macular Degeneration. JAMA Ophthalmol 2019; 136:770-778. [PMID: 29800005 DOI: 10.1001/jamaophthalmol.2018.1719] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
Importance Amyloid-β is a major component of retinal drusen, the primary lesions of age-related macular degeneration (AMD), and autopsy and animal models suggested that anticholinergic drug (ACD) use increased brain amyloid-β deposition. Objective To investigate the association between exposure to ACDs and late AMD (features of neovascular AMD or geographic atrophy of the retinal pigment epithelium in at least 1 eye). Design, Setting and Participants A multicenter case-control study in 4 French ophthalmologic centers comprising 200 cases with late AMD and 200 controls enrolled from July 2016 to June 2017. Exposures Exposure to at least 3 months of ACDs started before AMD diagnosis was recorded during a specific interview. A dose-effect association with cumulative exposure duration and Anticholinergic Burden Score was explored. The association between ACD exposure and AMD was assessed by multivariate logistic regression analysis adjusted for age, sex, smoking status, family history of AMD, alcohol consumption, and use of anticoagulant and anti-inflammatory drugs. Odds ratios (ORs) and 95% confidence intervals were estimated. Main Outcomes and Measures Association between exposure to ACDs and late AMD. Results Among case participants, the mean (SD) age was 74.8 (9.2) years, 129 (64.5%) were women, 192 (96%) were white, 65 (32.5%) had geographic atrophy, 135 (67.5%) had neovascular AMD, 116 (58%) had unilateral AMD, and 84 (42%) had bilateral AMD. Among control participants, the mean (SD) age was 75.5 (7.2) years, with 116 (58%) women and 187 (93.5%) white participants. Twenty-six cases (13%) and 10 controls (5%) were exposed to ACDs throughout life for at least 3 months before AMD onset. Risk of AMD was increased with ever exposure to ACDs (adjusted OR [aOR], 2.84; 95% CI, 1.33-6.06; P = .007), high Anticholinergic Burden Score (≥3) (aOR, 6.42; 95% CI, 1.38-29.92; P = .02), and longest cumulative exposure to ACD (≥15 years) (aOR, 5.88; 95% CI, 1.22-28.31; P = .03). Conclusions and Relevance Risk of late AMD may be increased with at least 3 months' use of ACDs. A dose-effect association was suggested by a greater association with prolonged use and high Anticholinergic Burden Score. Further studies, in particular those with longitudinal design, are needed to confirm this association.
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Affiliation(s)
- Gauthier Aldebert
- Department of Ophthalmology, Gui De Chauliac Hospital, Montpellier, France
| | - Jean-Luc Faillie
- Department of Medical Pharmacology and Toxicology, Lapeyronie Hospital, Montpellier, France
| | | | - Thibault Mura
- Department of Epidemiologic and Clinical Reserch, La Colombière Hospital, Montpellier, France.,Institut National de la Santé et de la Recherche Médicale, Univ Montpellier, Neuropsychiatry: Epidemiological and Clinical Research, Montpellier, France
| | - Isabelle Carrière
- Institut National de la Santé et de la Recherche Médicale, Univ Montpellier, Neuropsychiatry: Epidemiological and Clinical Research, Montpellier, France
| | - Cécile Delcourt
- University Bordeaux, Inserm, Bordeaux Population Health Research Center, Bordeaux, France
| | | | - Max Villain
- Department of Ophthalmology, Gui De Chauliac Hospital, Montpellier, France
| | - Vincent Daien
- Department of Ophthalmology, Gui De Chauliac Hospital, Montpellier, France.,Institut National de la Santé et de la Recherche Médicale, Univ Montpellier, Neuropsychiatry: Epidemiological and Clinical Research, Montpellier, France.,The Save Sight Institute, Sydney Medical School, The University of Sydney, Sydney, Australia
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12
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Mahmoud NI, Messiha BAS, Abo-Saif AA, Abdel-Bakky MS. Inhibition of activated factor X; a new pathway in ameliorating carbon tetrachloride-induced liver fibrosis in rats. J Biochem Mol Toxicol 2019; 33:e22287. [PMID: 30719803 DOI: 10.1002/jbt.22287] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2018] [Revised: 10/13/2018] [Accepted: 12/21/2018] [Indexed: 11/10/2022]
Abstract
Activated factor X has a central role in the coagulation activation and also contributes to chronic inflammation and tissue fibrosis. In this study, rivaroxaban, a direct factor X inhibitor, attenuates liver fibrosis induced by carbon tetrachloride (CCl4 ). Male rats were randomly allocated into three groups: a control group, CCl 4 fibrotic group, and CCl 4 +rivaroxaban (5 mg/kg) group. Liver fibrosis was induced by subcutaneous injection of CCl 4 twice a week for 6 weeks. Rivaroxaban significantly restored the biochemical parameter including inflammatory and fibrosis markers with histopathological evidence using routine and Masson trichrome staining. It reduced also the expression of tissue factor, fibrin, transforming growth factor and α-smooth muscle actin in the liver tissues. This concludes that rivaroxaban attenuates liver injury caused by CCl 4 , at least in part by inhibiting coagulation and proinflammatory activation. In conclusion, rivaroxaban may be used for the management of liver fibrosis.
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Affiliation(s)
- Nesreen Ishak Mahmoud
- Department of Pharmacology and Toxicology, Faculty of Pharmacy, Nahda University, Beni-Suef, Egypt
| | | | - Ali Ahmed Abo-Saif
- Department of Pharmacology and Toxicology, Faculty of Pharmacy, Nahda University, Beni-Suef, Egypt.,Department of Pharmacology, Faculty of Medicine, Al-Azhar University, Cairo, Egypt
| | - Mohamed Sadek Abdel-Bakky
- Department of Pharmacology and Toxicology, Faculty of Pharmacy, Nahda University, Beni-Suef, Egypt.,Department of Pharmacology and Toxicology, Faculty of Pharmacy, Al-Azhar University, Cairo, Egypt
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13
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Utility of Induced Pluripotent Stem Cell-Derived Retinal Pigment Epithelium for an In Vitro Model of Proliferative Vitreoretinopathy. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2019; 1186:33-53. [PMID: 31654385 DOI: 10.1007/978-3-030-28471-8_2] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
The advent of stem cell technology, including the technology to induce pluripotency in somatic cells, and direct differentiation of stem cells into specific somatic cell types, has created an exciting new field of scientific research. Much of the work with pluripotent stem (PS) cells has been focused on the exploration and exploitation of their potential as cells/tissue replacement therapies for personalized medicine. However, PS and stem cell-derived somatic cells are also proving to be valuable tools to study disease pathology and tissue-specific responses to injury. High-throughput drug screening assays using tissue-specific injury models have the potential to identify specific and effective treatments that will promote wound healing. Retinal pigment epithelium (RPE) derived from induced pluripotent stem cells (iPS-RPE) are well characterized cells that exhibit the phenotype and functions of in vivo RPE. In addition to their role as a source of cells to replace damaged or diseased RPE, iPS-RPE provide a robust platform for in vitro drug screening to identify novel therapeutics to promote healing and repair of ocular tissues after injury. Proliferative vitreoretinopathy (PVR) is an abnormal wound healing process that occurs after retinal tears or detachments. In this chapter, the role of iPS-RPE in the development of an in vitro model of PVR is described. Comprehensive analyses of the iPS-RPE response to injury suggests that these cells provide a physiologically relevant tool to investigate the cellular mechanisms of the three phases of PVR pathology: migration, proliferation, and contraction. This in vitro model will provide valuable information regarding cellular wound healing responses specific to RPE and enable the identification of effective therapeutics.
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14
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Ma Y, Zhou Y, Wu F, Ji W, Zhang J, Wang X. The Bidirectional Interactions Between Inflammation and Coagulation in Fracture Hematoma. TISSUE ENGINEERING PART B-REVIEWS 2018; 25:46-54. [PMID: 30129875 DOI: 10.1089/ten.teb.2018.0157] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
IMPACT STATEMENT The review leads to better understanding of the interrelation between inflammation mediators and coagulation factors in the early fracture hematoma, and their influences on hematoma formation in the beginning of fracture healing. Furthermore, development of therapies aimed at simultaneous modulation of both coagulation factors and inflammation factors that affect hematoma structure, rather than specific factors, may be most promising.
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Affiliation(s)
- Yaping Ma
- 1 Department of Orthopaedic Surgery, Affiliated Hospital of Zunyi Medical University, Zunyi, China.,2 Joint Orthopaedic Research Center of Zunyi Medical University & University of Rochester Medical Center (JCMR-ZMU & URMC), Zunyi Medical University, Zunyi, China
| | - Yinghong Zhou
- 3 Institute of Health and Biomedical Innovation, Queensland University of Technology, Brisbane, Australia
| | - Fujun Wu
- 1 Department of Orthopaedic Surgery, Affiliated Hospital of Zunyi Medical University, Zunyi, China
| | - Wenjun Ji
- 1 Department of Orthopaedic Surgery, Affiliated Hospital of Zunyi Medical University, Zunyi, China
| | - Jun Zhang
- 1 Department of Orthopaedic Surgery, Affiliated Hospital of Zunyi Medical University, Zunyi, China
| | - Xin Wang
- 1 Department of Orthopaedic Surgery, Affiliated Hospital of Zunyi Medical University, Zunyi, China.,2 Joint Orthopaedic Research Center of Zunyi Medical University & University of Rochester Medical Center (JCMR-ZMU & URMC), Zunyi Medical University, Zunyi, China.,3 Institute of Health and Biomedical Innovation, Queensland University of Technology, Brisbane, Australia
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15
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Bastiaans J, Mulder VC, van Meurs JC, Smits - te Nijenhuis M, van Holten - Neelen C, van Hagen PM, Dik WA. Dabigatran inhibits intravitreal thrombin activity. Acta Ophthalmol 2018; 96:452-458. [PMID: 29193875 DOI: 10.1111/aos.13630] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2016] [Accepted: 09/18/2017] [Indexed: 12/22/2022]
Abstract
PURPOSE Proliferative vitreoretinopathy (PVR) is a vitreoretinal disorder in which retinal pigment epithelial (RPE) cell activation contributes to both formation of fibrotic retinal membranes and inflammation. Vitreous of patients with PVR contains increased thrombin activity which induces profibrotic and proinflammatory programs in RPE cells. Inhibition of intravitreal thrombin activity may thus represent a therapeutic option for PVR. In this study, we examined the capacity of the clinically available direct thrombin inhibitor dabigatran to inhibit thrombin activity in vitreous fluids. METHODS ARPE-19 cells were cultured with the following: (i) thrombin, (ii) vitreous without thrombin activity and (iii) vitreous with elevated thrombin activity (PVR samples and thrombin spiked vitreous) either in the presence or absence of dabigatran (range: 10-5 to 10-7 M). Subsequently, CCL2, CXCL8, GMCSF, IL6 and PDGFB mRNA expression levels were determined by RQ-PCR and protein levels of 27 cytokines, chemokines and growth factors were detected in culture supernatants using a multiplex approach. In addition, the capacity of vitreous fluids obtained from patients after oral dabigatran intake was tested in an in vitro thrombin activity assay. RESULTS Thrombin and vitreous fluids containing thrombin activity induced CCL2, CXCL8, GM-CSF, IL-6 and PDGF-BB expression by ARPE-19 cells, which was inhibited by dabigatran. In addition, dabigatran that reached the vitreous after repeated oral intake did inhibit thrombin activity in the in vitro activity assay. CONCLUSION Proliferative vitreoretinopathy (PVR) is associated with increased intravitreal thrombin activity that activates profibrotic and proinflammatory pathways in RPE cells. Our findings provide evidence that this activation pathway can potentially be inhibited by dabigatran.
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Affiliation(s)
- Jeroen Bastiaans
- Departments of Immunology; Erasmus MC; Rotterdam The Netherlands
| | | | - Jan C. van Meurs
- The Rotterdam Eye Hospital; Rotterdam The Netherlands
- Ophthalmology; Erasmus MC; Rotterdam The Netherlands
| | | | | | - P. Martin van Hagen
- Departments of Immunology; Erasmus MC; Rotterdam The Netherlands
- Internal Medicine; Erasmus MC; Rotterdam The Netherlands
| | - Willem A. Dik
- Departments of Immunology; Erasmus MC; Rotterdam The Netherlands
- Laboratory Medical Immunology; Erasmus MC; Rotterdam The Netherlands
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16
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Fortmann SD, Rao SV, Tanguay JF, Lordkipanidze M, Hanley DF, Can M, Kim MH, Marciniak TA, Serebruany VL. Vorapaxar and diplopia: Possible off-target PAR-receptor mismodulation. Thromb Haemost 2017; 115:905-10. [DOI: 10.1160/th15-11-0882] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2015] [Accepted: 01/05/2016] [Indexed: 11/05/2022]
Abstract
SummaryVorapaxar, a novel antiplatelet thrombin PAR-1 inhibitor, has been evaluated in the successful TRA2P trial and the failed TRACER trial. The drug is currently approved for post myocardial infarction and peripheral artery disease indications with concomitant use of clopidogrel and/or aspirin. The FDA ruled that the vorapaxar safety profile is acceptable. However, both trials revealed excess diplopia (double vision) usually reversible after vorapaxar. The diplopia risk appears to be small (about 1 extra case per 1,000 treated subjects), but real. Overall, there were 10 placebo and 34 vorapaxar diplopia cases (p=0.018) consistent for TRACER (2 vs 13 cases; p=0.010) and for TRA2P (8 vs 21 cases; p=0.018). Hence, we review the FDA-confirmed evidence and discuss potential causes and implications of such a surprising adverse association, which may be related to off-target PAR receptor mismodulation in the eye.
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17
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Abstract
PDGFs and their receptors are critical regulators of numerous tissues and organs, including the eye. Extensive studies have shown that PDGFs and their receptors play critical roles in many ocular neovascular diseases, such as neovascular age-related macular degeneration, retinopathy of prematurity, and proliferative vitreoretinopathy. In addition, PDGFs and PDGFRs are also important players in ocular diseases involving the degeneration of retinal neuronal and vascular cells, such as glaucoma and retinitis pigmentosa. Due to their critical roles in the pathogenesis of many blinding ocular diseases, the PDGFs and PDGFRs have been considered as important target molecules for the treatment of eye diseases. PDGF-C and PDGF-D are relatively new members of the PDGF family and are potent angiogenic and survival factors. Recent studies have demonstrated their important roles in different types of eye diseases. Thus, modulating PDGF-C and PDGF-D activities may have therapeutic values for the treatment of ocular neovascular and degenerative diseases. This review mainly summarizes the recent advances on PDGF-C and PDGF-D biology in relationship to some major ocular diseases.
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Affiliation(s)
- Anil Kumar
- State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-Sen University, 54 South Xianlie Road, Guangzhou 510060, Guangdong, PR China
| | - Xuri Li
- State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-Sen University, 54 South Xianlie Road, Guangzhou 510060, Guangdong, PR China.
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18
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Che D, Zhou T, Lan Y, Xie J, Gong H, Li C, Feng J, Hong H, Qi W, Ma C, Wu Q, Yang X, Gao G. High glucose-induced epithelial-mesenchymal transition contributes to the upregulation of fibrogenic factors in retinal pigment epithelial cells. Int J Mol Med 2016; 38:1815-1822. [DOI: 10.3892/ijmm.2016.2768] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2016] [Accepted: 09/29/2016] [Indexed: 11/06/2022] Open
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19
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Coagulation Factors in the Interstitial Space. Protein Sci 2016. [DOI: 10.1201/9781315374307-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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20
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The physiology of fetal membrane weakening and rupture: Insights gained from the determination of physical properties revisited. Placenta 2016; 42:59-73. [PMID: 27238715 DOI: 10.1016/j.placenta.2016.03.015] [Citation(s) in RCA: 76] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/19/2016] [Revised: 03/05/2016] [Accepted: 03/31/2016] [Indexed: 01/14/2023]
Abstract
Rupture of the fetal membranes (FM) is precipitated by stretch forces acting upon biochemically mediated, pre-weakened tissue. Term FM develop a para-cervical weak zone, characterized by collagen remodeling and apoptosis, within which FM rupture is thought to initiate. Preterm FM also have a weak region but are stronger overall than term FM. Inflammation/infection and decidual bleeding/abruption are strongly associated with preterm premature FM rupture (pPROM), but the specific mechanisms causing FM weakening-rupture in pPROM are unknown. There are no animal models for study of FM weakening and rupture. Over a decade ago we developed equipment and methodology to test human FM strength and incorporated it into a FM explant system to create an in-vitro human FM weakening model system. Within this model TNF (modeling inflammation) and Thrombin (modeling bleeding) both weaken human FM with concomitant up regulation of MMP9 and cellular apoptosis, mimicking the characteristics of the spontaneous FM rupture site. The model has been enhanced so that test agents can be applied directionally to the choriodecidual side of the FM explant consistent with the in-vivo situation. With this enhanced system we have demonstrated that the pathways involving inflammation/TNF and bleeding/Thrombin induced FM weakening overlap. Furthermore GM-CSF production was demonstrated to be a critical common intermediate step in both the TNF and the Thrombin induced FM weakening pathways. This model system has also been used to test potential inhibitors of FM weakening and therefore pPROM. The dietary supplement α-lipoic acid and progestogens (P4, MPA and 17α-hydroxyprogesterone) have been shown to inhibit both TNF and Thrombin induced FM weakening. The progestogens act at multiple points by inhibiting both GM-CSF production and GM-CSF action. The use of a combined biomechanical/biochemical in-vitro human FM weakening model system has allowed the pathways of fetal membrane weakening to be delineated, and agents that may be of clinical use in inhibiting these pathways to be tested.
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Murugesan N, Üstunkaya T, Feener EP. Thrombosis and Hemorrhage in Diabetic Retinopathy: A Perspective from an Inflammatory Standpoint. Semin Thromb Hemost 2015; 41:659-64. [PMID: 26305236 PMCID: PMC4765320 DOI: 10.1055/s-0035-1556731] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Abstract
Retinal ischemia and hemorrhage are hallmarks of worsening diabetic retinopathy, which can lead to neovascularization, macular edema, and severe vision loss. Although diabetes alters expression of clotting factors and their activities, and increases retinal microthromboses, the effects of thrombotic processes on the pathogenesis of diabetic retinopathy are not fully understood. In addition to the roles of coagulation and fibrinolytic cascades in thrombosis and hemostasis, components in these systems also mediate multiple effects on the vasculature that promote inflammation. Plasma kallikrein, thrombin, and urokinase are increased in diabetic retinopathy, and exert proinflammatory effects that contribute to retinal vascular dysfunction. The accumulation and activation of these and additional coagulation factors in the vitreous due to hemorrhage and chronic retinal injury in the diabetic retina may contribute to worsening of retinal inflammation and capillary dysfunction, which lead to retinal ischemia and edema. Further understanding of the role for specific coagulation factors in diabetic retinopathy may suggest new therapeutic opportunities for this vision-threatening disease.
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Affiliation(s)
- Nivetha Murugesan
- Joslin Diabetes Center, Boston, MA
- Department of Medicine, Harvard Medical School, Boston, MA
| | | | - Edward P. Feener
- Joslin Diabetes Center, Boston, MA
- Department of Medicine, Harvard Medical School, Boston, MA
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22
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Korthagen NM, van Bilsen K, Swagemakers SMA, van de Peppel J, Bastiaans J, van der Spek PJ, van Hagen PM, Dik WA. Retinal pigment epithelial cells display specific transcriptional responses upon TNF-α stimulation. Br J Ophthalmol 2015; 99:700-4. [PMID: 25680620 DOI: 10.1136/bjophthalmol-2014-306309] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2014] [Accepted: 01/26/2015] [Indexed: 12/11/2022]
Abstract
BACKGROUND/AIMS Tumour necrosis factor-α (TNF-α) is a key mediator of ocular inflammation and its interaction with the retinal pigment epithelium (RPE) may be a driving force in vitreoretinal disorders such as age-related macular degeneration, proliferative vitreoretinopathy (PVR) and diabetic retinopathy. Under inflammatory conditions, the ability of RPE cells to maintain the blood-retinal barrier and immune privilege may be lost and proliferation of RPE cells is facilitated. To gain insight into the effects of TNF-α on RPE cells, a gene expression study was performed. METHODS ARPE-19 and HT-29 cells were stimulated with 50 ng/mL TNF-α for 6 h. Gene expression patterns were compared between stimulated and control cells using whole genome gene expression arrays. Data were analysed using Partek and OmniViz and validated using quantitative RT-PCR. Functional annotation analysis was performed using Ingenuity and DAVID. RESULTS A total of 97 genes were uniquely modulated by TNF-α in ARPE-19 cells compared with HT-29 cells (86 upregulated and 11 downregulated). Most commonly affected biological processes were apoptosis, cell motility and cell signalling. The highest upregulated gene was EFNA1. Among the downregulated genes were transcription factors implicated in ocular development (SIX3, PAX6) and modulation of p53-mediated apoptosis (CITED2). CONCLUSIONS This study provides insight into the unique responses of RPE cells to TNF-α stimulation and suggests a role for genes involved in apoptosis and retinal epithelial development. These findings contribute to our understanding of the behaviour of RPE cells under inflammatory conditions and the crucial role of RPE cells in vitreoretinal diseases.
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Affiliation(s)
- Nicoline M Korthagen
- Department of Immunology, Laboratory Medical Immunology, Erasmus MC, University Medical Center Rotterdam, The Netherlands
| | - Kiki van Bilsen
- Department of Internal Medicine, Section Clinical Immunology, Erasmus MC, University Medical Center Rotterdam, The Netherlands
| | - Sigrid M A Swagemakers
- Department of Bioinformatics, Erasmus MC, University Medical Center Rotterdam, The Netherlands
| | - Jeroen van de Peppel
- Department of Internal Medicine, Section Clinical Immunology, Erasmus MC, University Medical Center Rotterdam, The Netherlands
| | - Jeroen Bastiaans
- Department of Immunology, Laboratory Medical Immunology, Erasmus MC, University Medical Center Rotterdam, The Netherlands
| | - Peter J van der Spek
- Department of Bioinformatics, Erasmus MC, University Medical Center Rotterdam, The Netherlands
| | - P Martin van Hagen
- Department of Immunology, Laboratory Medical Immunology, Erasmus MC, University Medical Center Rotterdam, The Netherlands Department of Internal Medicine, Section Clinical Immunology, Erasmus MC, University Medical Center Rotterdam, The Netherlands
| | - Willem A Dik
- Department of Immunology, Laboratory Medical Immunology, Erasmus MC, University Medical Center Rotterdam, The Netherlands
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Kumar D, Moore RM, Nash A, Springel E, Mercer BM, Philipson E, Mansour JM, Moore JJ. Decidual GM-CSF is a critical common intermediate necessary for thrombin and TNF induced in-vitro fetal membrane weakening. Placenta 2014; 35:1049-56. [PMID: 25454284 DOI: 10.1016/j.placenta.2014.10.001] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/27/2014] [Revised: 09/26/2014] [Accepted: 10/03/2014] [Indexed: 02/07/2023]
Abstract
INTRODUCTION Inflammation/infection and decidual bleeding/abruption are highly associated with pPROM. As no animal model for pPROM exists, we have developed an in-vitro model system for the study of human fetal membrane (FM) weakening/rupture. Using it we have demonstrated that both TNF/IL-1 (modeling inflammation) and thrombin (modeling bleeding) weaken full thickness FM in a dose dependent manner concomitant with inducing biochemical changes similar to those seen in the FM physiological weak zone. METHODS As the physiological site of infection and bleeding is the choriodecidua (CD), we modified our model system with full thickness FM tissue mounted on modified Transwell culture inserts to permit directional TNF/thrombin exposure on the decidua only (rather than both sides of the FM). After incubation, medium was sampled separately from the CD facing (maternal side) or from the amnion facing (fetal side) compartments and probed for cytokine release and confirmed with western blots. The FM was strength tested within the insert. RESULTS Full-thickness FM fragments exposed to TNF or thrombin on CD side only showed dose dependent weakening and biochemical changes consistent with previous reports. Concomitantly, GM-CSF increased markedly on the CD but not the amnion side. Numerous proteases including MMP1 and MMP3 also increased on the CD side. Pre-incubation with GM-CSF antibody blocked both thrombin and TNF induced weakening. Finally, GM-CSF weakened FM in a dose dependent manner. DISCUSSION GM-CSF is a critical common intermediate in the thrombin and TNF FM weakening pathways.
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Affiliation(s)
- D Kumar
- Department of Pediatrics, Case Western Reserve University, Cleveland, OH, USA.
| | - R M Moore
- Department of Pediatrics, Case Western Reserve University, Cleveland, OH, USA
| | - A Nash
- Department of Pediatrics, Case Western Reserve University, Cleveland, OH, USA
| | - E Springel
- Department of Reproductive Biology, Case Western Reserve University, Cleveland, OH, USA
| | - B M Mercer
- Department of Reproductive Biology, Case Western Reserve University, Cleveland, OH, USA
| | - E Philipson
- Women's Institute-Cleveland Clinic, Cleveland, OH, USA
| | - J M Mansour
- Mechanical and Aerospace Engineering, Case Western Reserve University, Cleveland, OH, USA
| | - J J Moore
- Department of Pediatrics, Case Western Reserve University, Cleveland, OH, USA; Department of Reproductive Biology, Case Western Reserve University, Cleveland, OH, USA
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Sun Y, You ZP. Curcumin inhibits human retinal pigment epithelial cell proliferation. Int J Mol Med 2014; 34:1013-9. [PMID: 25070648 PMCID: PMC4152142 DOI: 10.3892/ijmm.2014.1861] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2014] [Accepted: 07/11/2014] [Indexed: 01/27/2023] Open
Abstract
Proliferative vitreoretinopathy (PVR) is a common cause of intraoperative failure following retinal reattachment surgery and is mediated in part through the migration, de-differentiation and proliferation of retinal pigment epithelial (RPE) cells. Given the cytotoxic effects of curcumin on epithelial and endothelial cells, in this study, we assessed the effects of curcumin on human RPE (hRPE) cell proliferation. WST-1 analysis revealed that curcumin significantly inhibited primary hRPE cell proliferation in a dose- and time-dependent manner (P<0.001) with the greatest inhibition observed at the dose of 15 μg/ml curcumin. Flow cytometric analysis indicated that the cytotoxic effects of curcumin on hRPE cell proliferation were mediated by cell cycle arrest at the G0/G1 phase and the induction of apoptosis (both P<0.001), which was confirmed by ultrastructural analysis using transmission electron microscopy. Furthermore, western blot analysis revealed that curcumin induced p53 and p21WAF1/CIP1 expression with a concomitant decrease in proliferating cell nuclear antigen protein levels (P<0.05). Curcumin effectively inhibited primary hRPE cell proliferation, which may be mediated by the p53 pathway. Further in vivo studies are required in order to fully explore the therapeutic potential of curcumin for PVR.
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Affiliation(s)
- Yun Sun
- Department of Ophthalmology, The Second Affiliated Hospital of Nanchang University, Nanchang, Jiangxi 330006, P.R. China
| | - Zhi-Peng You
- Department of Ophthalmology, The Second Affiliated Hospital of Nanchang University, Nanchang, Jiangxi 330006, P.R. China
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Paraoxonase enzyme protects retinal pigment epithelium from chlorpyrifos insult. PLoS One 2014; 9:e101380. [PMID: 24979751 PMCID: PMC4076322 DOI: 10.1371/journal.pone.0101380] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2014] [Accepted: 06/05/2014] [Indexed: 12/21/2022] Open
Abstract
Retinal pigment epithelium (RPE) provides nourishment and protection to the eye. RPE dysfunction due to oxidative stress and inflammation is one of the major reason for many of the retinal disorders. Organophosphorus pesticides are widely used in the agricultural, industrial and household activities in India. However, their effects on the eye in the context of RPE has not been studied. In this study the defense of the ARPE19 cells exposed to Chlorpyrifos (1 nM to 100 µM) in terms of the enzyme paraoxonase (PON) was studied at 24 hr and 9 days of treatment. Chlorpyrifos was found to induce oxidative stress in the ARPE19 cells as seen by significant increase in ROS and decrease in glutathione (GSH) levels without causing cell death. Tissue resident Paraoxonase 2 (PON2) mRNA expression was elevated with chlorpyrifos exposure. The three enzymatic activities of PON namely, paraoxonase (PONase), arylesterase (PON AREase) and thiolactonase (PON HCTLase) were also found to be significantly altered to detoxify and as an antioxidant defense. Among the transcription factors regulating PON2 expression, SP1 was significantly increased with chlorpyrifos exposure. PON2 expression was found to be crucial as ARPE19 cells showed a significant loss in their ability to withstand oxidative stress when the cells were subjected to chlorpyrifos after silencing PON2 expression. Treatment with N-acetyl cysteine positively regulated the PON 2 expression, thus promoting the antioxidant defense put up by the cells in response to chlorpyrifos.
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Effects of arteriolar constriction on retinal gene expression and Müller cell responses in a rat model of branch retinal vein occlusion. Graefes Arch Clin Exp Ophthalmol 2013; 252:257-65. [PMID: 24292703 DOI: 10.1007/s00417-013-2532-z] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2013] [Revised: 10/31/2013] [Accepted: 11/13/2013] [Indexed: 01/30/2023] Open
Abstract
BACKGROUND To investigate the effect of induced arteriolar constriction (AC) on alterations in gene expression of factors implicated in the development of edema in branch retinal vein occlusion (BRVO). METHODS In Brown-Norway rats, BRVO was induced by laser photocoagulation of the veins in one half of the retina. AC of the afferent arterioles was performed 30 min later. We then determined the expression of Vegfa, Vegfb, Pedf, Kir4.1, Aqp4, Aqp1, Il1ß, and Il6 with real-time polymerase chain reaction (RT-PCR) in the neuroretina and retinal pigment epithelium (RPE) after 1, 3, and 7 days. Immunostaining against GFAP, aquaporin (AQP)-4, and Kir4.1 was performed on days 1 and 3. RESULTS BRVO resulted in transient upregulation of Vegfa in the neuroretina on day 1. The expressions of Kir4.1, AQP4, and AQP1 were downregulated, and Il1ß and Il6 were strongly upregulated, on days 1 and 3. The retinal distribution of GFAP and AQP4 proteins remained unaltered, while the Kir4.1 protein displayed redistribution from polarized to uniform retinal distribution. AC accelerated the restoration of downregulated Kir4.1, Aqp4, and Aqp1 in the RPE, of Kir4.1 in the neuroretina, and of upregulated Il6 in the neuroretina. AC did not influence the gliotic alterations of Müller cells and the redistribution of the Kir4.1 protein. CONCLUSION Constriction of the afferent artery in the BRVO region accelerated the restoration of potassium channels and Il6. These alterations may contribute to faster resorption of retinal edema, and may decrease the level of inflammation.
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Proliferative vitreoretinopathy after eye injuries: an overexpression of growth factors and cytokines leading to a retinal keloid. Mediators Inflamm 2013; 2013:269787. [PMID: 24198445 PMCID: PMC3806231 DOI: 10.1155/2013/269787] [Citation(s) in RCA: 99] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2013] [Accepted: 08/26/2013] [Indexed: 01/16/2023] Open
Abstract
Eye injury is a significant disabling worldwide health problem. Proliferative Vitreoretinopathy (PVR) is a common complication that develops in up to 40–60% of patients with an open-globe injury. Our knowledge about the pathogenesis of PVR has improved in the last decades. It seems that the introduction of immune cells into the vitreous, like in penetrating ocular trauma, triggers the production of growth factors and cytokines that come in contact with intra-retinal cells, like Müller cells and RPE cells. Growth factors and cytokines drive the cellular responses leading to PVR's development. Knowledge of the pathobiological and pathophysiological mechanisms involved in posttraumatic PVR is increasing the possibilities of management, and it is hoped that in the future our treatment strategies will evolve, in particular adopting a multidrug approach, and become even more effective in vision recovery. This paper reviews the current literature and clinical trial data on the pathogenesis of PVR and its correlation with ocular trauma and describes the biochemical/molecular events that will be fundamental for the development of novel treatment strategies. This literature review included PubMed articles published from 1979 through 2013. Only studies written in English were included.
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