1
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Zhao C, Liu Y, Meng J, Wang X, Liu X, Li W, Zhou Q, Xiang J, Li N, Hou S. LGALS3BP in Microglia Promotes Retinal Angiogenesis Through PI3K/AKT Pathway During Hypoxia. Invest Ophthalmol Vis Sci 2022; 63:25. [PMID: 35895036 PMCID: PMC9344220 DOI: 10.1167/iovs.63.8.25] [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: 12/14/2022] Open
Abstract
Purpose Retinal microglia promote angiogenesis and vasculopathy in oxygen-induced retinopathy (OIR); however, its specific molecular mechanism in the formation of retinal angiogenesis remains unclear. The lectin galactoside-binding soluble 3 binding protein (LGALS3BP), a member of the scavenger receptor cysteine-rich (SRCR) domain protein family, is involved in tumor neovascularization, and we therefore hypothesized that LGALS3BP plays an active role in microglia-induced angiogenesis. Methods The expression of LGALS3BP in microglia was detected by immunofluorescence, RT-qPCR, and western blotting. Functional assays of human umbilical vein endothelial cells (HUVECs) such as migration, proliferation, and tube formation were measured by Transwell, EdU, and Matrigel assays. Angiogenesis-related factors and PI3K/AKT levels were detected by western blotting. The relationship between LGALS3BP and PI3K or HIF-1α was investigated by immunoprecipitation. Results Our results showed that the expression of LGALS3BP was significantly increased in microglia surrounding neovascularization of the OIR mice and was also upregulated in human microglial clone 3 (HMC3) cells after hypoxia. Moreover, HUVECs co-cultured with hypoxic HMC3 cells showed increased migration, proliferation, and tube formation, as well as levels of angiogenesis-related factor. However, the proangiogenic ability and angiogenesis-related factor expression of HMC3 cells was suppressed after silencing LGALS3BP. LGALS3BP induces the upregulation of angiogenesis-related factors through the PI3K/AKT pathway and then promotes angiogenesis in microglia. Conclusions Collectively, our findings suggest that LGALS3BP in microglia plays an important role in angiogenesis, suggesting a potential therapeutic target of LGALS3BP for angiogenesis.
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Affiliation(s)
- Chenyang Zhao
- The First Affiliated Hospital of Chongqing Medical University, Chongqing, China.,Chongqing Key Laboratory of Ophthalmology, Chongqing, China.,Chongqing Branch of National Clinical Research Center for Ocular Diseases, Chongqing, China
| | - Yusen Liu
- The First Affiliated Hospital of Chongqing Medical University, Chongqing, China.,Chongqing Key Laboratory of Ophthalmology, Chongqing, China.,Chongqing Branch of National Clinical Research Center for Ocular Diseases, Chongqing, China
| | - Jiayu Meng
- The First Affiliated Hospital of Chongqing Medical University, Chongqing, China.,Chongqing Key Laboratory of Ophthalmology, Chongqing, China.,Chongqing Branch of National Clinical Research Center for Ocular Diseases, Chongqing, China
| | - Xiaotang Wang
- The First Affiliated Hospital of Chongqing Medical University, Chongqing, China.,Chongqing Key Laboratory of Ophthalmology, Chongqing, China.,Chongqing Branch of National Clinical Research Center for Ocular Diseases, Chongqing, China
| | - Xianyang Liu
- The First Affiliated Hospital of Chongqing Medical University, Chongqing, China.,Chongqing Key Laboratory of Ophthalmology, Chongqing, China.,Chongqing Branch of National Clinical Research Center for Ocular Diseases, Chongqing, China
| | - Wanqian Li
- The First Affiliated Hospital of Chongqing Medical University, Chongqing, China.,Chongqing Key Laboratory of Ophthalmology, Chongqing, China.,Chongqing Branch of National Clinical Research Center for Ocular Diseases, Chongqing, China
| | - Qian Zhou
- The First Affiliated Hospital of Chongqing Medical University, Chongqing, China.,Chongqing Key Laboratory of Ophthalmology, Chongqing, China.,Chongqing Branch of National Clinical Research Center for Ocular Diseases, Chongqing, China
| | - Junjie Xiang
- The First Affiliated Hospital of Chongqing Medical University, Chongqing, China.,Chongqing Key Laboratory of Ophthalmology, Chongqing, China.,Chongqing Branch of National Clinical Research Center for Ocular Diseases, Chongqing, China
| | - Na Li
- College of Basic Medicine, Chongqing Medical University, Chongqing, China
| | - Shengping Hou
- The First Affiliated Hospital of Chongqing Medical University, Chongqing, China.,Chongqing Key Laboratory of Ophthalmology, Chongqing, China.,Chongqing Branch of National Clinical Research Center for Ocular Diseases, Chongqing, China
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2
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Aykutlu MŞ, Güçlü H, Doğanlar ZB, Kurtdere AK, Doğanlar O. MicroRNA-184 attenuates hypoxia and oxidative stress-related injury via suppressing apoptosis, DNA damage and angiogenesis in an in vitro age-related macular degeneration model. Toxicol In Vitro 2022; 83:105413. [PMID: 35690295 DOI: 10.1016/j.tiv.2022.105413] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2022] [Revised: 04/13/2022] [Accepted: 06/03/2022] [Indexed: 11/16/2022]
Abstract
Age-related macular degeneration (AMD) is one of the leading causes of blindness worldwide, particularly in developed countries. Recently, microRNAs (miRs) have become popular research area to develop new treatment options of AMD. However, interaction between hsa-miR-184 and AMD remain largely unexplored. In this study, sub-lethal levels of Deforoxamine Mesylate salt (DFX) and H2O2 were applied to ARPE-19 cells to establish a severe in vitro AMD model, via durable hypoxia and oxidative stress. We found that up-regulation of miR-184 level in AMD can suppress hypoxia-related angiogenic signals through HIF-1α/VEGF/MMPs axis. Also, miR-184 suppressed the hypoxia sensor miR-155 and genes in the EGFR/PI3K/AKT pathway, which is an alternative pathway in angiogenesis. To investigate the mechanism behind this protective effect, we evaluated the impact of miR-184 on retinal apoptosis in a model of AMD. miR-184 inhibited retinal apoptosis by upregulating BCL-2 and downregulating pro-apoptototic BAX, TRAIL, Caspase 3 and 8 signals as well as p53. Taken together, miR-184 attenuates retinal cell damage induced by severe AMD pathologies through suppressing hypoxia, angiogenesis and apoptosis. The safety profile of miR-184 was observed to be similar to Bevacizumab, which is in wide use clinically, but miR-184 was found to provide a more effective therapeutic potential by regulating simultaneously multiple pathologies.
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Affiliation(s)
- Merve Şambel Aykutlu
- Trakya University Faculty of Medicine, Department of Ophthalmology, 22030 Edirne, Turkey.
| | - Hande Güçlü
- Trakya University Faculty of Medicine, Department of Ophthalmology, 22030 Edirne, Turkey
| | - Zeynep Banu Doğanlar
- Trakya University Faculty of Medicine, Department of Medical Biology, 22030 Edirne, Turkey.
| | - Ayşe Kardelen Kurtdere
- Trakya University Faculty of Medicine, Department of Medical Biology, 22030 Edirne, Turkey
| | - Oğuzhan Doğanlar
- Trakya University Faculty of Medicine, Department of Medical Biology, 22030 Edirne, Turkey.
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3
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Kasica N, Święch A, Saładziak K, Mackiewicz J, Osęka M. The Inhibitory Effect of Selected D2 Dopaminergic Receptor Agonists on VEGF-Dependent Neovascularization in Zebrafish Larvae: Potential New Therapy in Ophthalmic Diseases. Cells 2022; 11:cells11071202. [PMID: 35406766 PMCID: PMC8997652 DOI: 10.3390/cells11071202] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2022] [Revised: 03/26/2022] [Accepted: 03/31/2022] [Indexed: 01/01/2023] Open
Abstract
Pathological angiogenesis is correlated with many ophthalmic diseases. The most common are exudative age-related macular degeneration and proliferative diabetic retinopathy. The current treatment for these diseases is based on regularly administered anti-VEGF antibodies injections. In the study, we investigated selected D2 dopaminergic receptor agonists, namely bromocriptine, cabergoline and pergolide, on hypoxia-induced neovascularization. We used the zebrafish laboratory model, specifically three-day post fertilization (dpf) Tg(fli-1: EGFP) zebrafish larvae. To induce abnormal angiogenesis of hyaloid-retinal vessels (HRVs) and intersegmental vessels (ISVs), the larvae were treated with cobalt chloride (II) (CoCl2) (a hypoxia-inducing agent) from 24 h post fertilization. The inhibitory role of D2 dopaminergic receptor agonists was investigated using confocal microscopy and qPCR. Additionally, the results were compared to those obtained in the group treated with CoCl2 followed by bevacizumab, the well-known antiangiogenic agent. Confocal microscopy analyses revealed severe deformation of vessels in the CoCl2 treated group, while co-incubation with bromocriptine, cabergoline, pergolide and bevacizumab, respectively, significantly inhibited abnormalities of angiogenesis. The qPCR analyses supported the protective role of the chosen dopaminergic agonists by demonstrating their influence on CoCl2-derived upregulation of vegfaa expression. The present results suggest that the D2 receptor agonists can be considered as a new direction in research for antiangiogenic therapy.
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Affiliation(s)
- Natalia Kasica
- Department of Animal Anatomy, Faculty of Veterinary Medicine, University of Warmia and Mazury in Olsztyn, Oczapowskiego 13 Street, Box 105J, 10-719 Olsztyn, Poland
- Correspondence:
| | - Anna Święch
- Department of Retina and Vitreus Surgery, Medical University in Lublin, Chmielna 1 Street, 20-079 Lublin, Poland; (A.Ś.); (K.S.); (J.M.)
| | - Katarzyna Saładziak
- Department of Retina and Vitreus Surgery, Medical University in Lublin, Chmielna 1 Street, 20-079 Lublin, Poland; (A.Ś.); (K.S.); (J.M.)
| | - Jerzy Mackiewicz
- Department of Retina and Vitreus Surgery, Medical University in Lublin, Chmielna 1 Street, 20-079 Lublin, Poland; (A.Ś.); (K.S.); (J.M.)
| | - Maciej Osęka
- Oftalabs Sp. z o.o., Wrocławska 130, 58-306 Wałbrzych, Poland;
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4
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Liu C, Gao W, Zhao L, Cao Y. Progesterone attenuates neurological deficits and exerts a protective effect on damaged axons via the PI3K/AKT/mTOR-dependent pathway in a mouse model of intracerebral hemorrhage. Aging (Albany NY) 2022; 14:2574-2589. [PMID: 35305084 PMCID: PMC9004566 DOI: 10.18632/aging.203954] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2021] [Accepted: 02/28/2022] [Indexed: 02/05/2023]
Abstract
Intracerebral hemorrhage (ICH) is a devastating event with high disability and fatality rates. However, there is a lack of effective treatments for this condition. We aimed to investigate the neuroprotective and axonal regenerative effects of progesterone after ICH. For this purpose, an ICH model was established in adult mice by injecting type VII collagenase into the striatum; the mice were then treated with progesterone (8 mg/kg). Hematoma absorption, neurological scores, and brain water content were evaluated on days one, three, and seven after the ICH. The effect of progesterone on inflammation and axonal regeneration was examined on day three after the ICH using western blotting, immunohistochemistry, immunofluorescence, as well as hematoxylin-eosin, Nissl, and Luxol fast blue staining. In addition, we combined progesterone with the phosphoinositide 3-kinase/serine/threonine-specific protein kinase (PI3K/AKT) inhibitor, LY294002, to explore its potential neuroprotective mechanisms. Administration of progesterone attenuated the neurological deficits and expression of inflammatory cytokines and promoted axonal regeneration after ICH, this effect was blocked by LY294002. Collectively, these results suggest that progesterone could reduce axonal damage and produced partial neuroprotective effects after ICH through the PI3K/AKT/mTOR pathway, providing a new therapeutic target and basis for the treatment of ICH.
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Affiliation(s)
- Chang Liu
- Department of Neurosurgery, West China Medical School, West China Hospital, Sichuan University, Chengdu 610041, Sichuan Province, P.R. China
| | - Weina Gao
- Department of Intensive Care Unit, The Affiliated Chengdu 363 Hospital of Southwest Medical University, Chengdu 610041, Sichuan Province, P.R. China
| | - Long Zhao
- Department of Neurosurgery, Affiliated Hospital of North Sichuan Medical College, Nanchong 637002, Sichuan Province, P.R. China
| | - Yi Cao
- Department of Neurosurgery, Chengdu Second People's Hospital, Chengdu 610021, Sichuan Province, P.R. China
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5
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Mahon N, Slater K, O'Brien J, Alvarez Y, Reynolds A, Kennedy B. Discovery and Development of the Quininib Series of Ocular Drugs. J Ocul Pharmacol Ther 2022; 38:33-42. [PMID: 35089801 DOI: 10.1089/jop.2021.0074] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022] Open
Abstract
The quininib series is a novel collection of small-molecule drugs with antiangiogenic, antivascular permeability, anti-inflammatory, and antiproliferative activity. Quininib was initially identified as a drug hit during a random chemical library screen for determinants of developmental ocular angiogenesis in zebrafish. To enhance drug efficacy, novel quininib analogs were designed by applying medicinal chemistry approaches. The resulting quininib drug series has efficacy in in vitro and ex vivo models of angiogenesis utilizing human cell lines and tissues. In vivo, quininib drugs reduce pathological angiogenesis and retinal vascular permeability in rodent models. Quininib acts as a cysteinyl leukotriene (CysLT) receptor antagonist, revealing new roles of these G-protein-coupled receptors in developmental angiogenesis of the eye and unexpectedly in uveal melanoma (UM). The quininib series highlighted the potential of CysLT receptors as therapeutic targets for retinal vasculopathies (e.g., neovascular age-related macular degeneration, diabetic retinopathy, and diabetic macular edema) and ocular cancers (e.g., UM).
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Affiliation(s)
- Niamh Mahon
- UCD School of Biomolecular and Biomedical Science, University College Dublin, Dublin, Ireland.,UCD Conway Institute, University College Dublin, Dublin, Ireland
| | - Kayleigh Slater
- UCD School of Biomolecular and Biomedical Science, University College Dublin, Dublin, Ireland.,UCD Conway Institute, University College Dublin, Dublin, Ireland
| | - Justine O'Brien
- UCD School of Biomolecular and Biomedical Science, University College Dublin, Dublin, Ireland.,UCD Conway Institute, University College Dublin, Dublin, Ireland
| | - Yolanda Alvarez
- UCD School of Biomolecular and Biomedical Science, University College Dublin, Dublin, Ireland.,UCD Conway Institute, University College Dublin, Dublin, Ireland
| | - Alison Reynolds
- UCD Conway Institute, University College Dublin, Dublin, Ireland.,UCD School of Veterinary Medicine, Veterinary Sciences Center, University College Dublin, Dublin, Ireland
| | - Breandán Kennedy
- UCD School of Biomolecular and Biomedical Science, University College Dublin, Dublin, Ireland.,UCD Conway Institute, University College Dublin, Dublin, Ireland
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6
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Hong Y, Luo Y. Zebrafish Model in Ophthalmology to Study Disease Mechanism and Drug Discovery. Pharmaceuticals (Basel) 2021; 14:ph14080716. [PMID: 34451814 PMCID: PMC8400593 DOI: 10.3390/ph14080716] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2021] [Revised: 07/16/2021] [Accepted: 07/21/2021] [Indexed: 12/14/2022] Open
Abstract
Visual impairment and blindness are common and seriously affect people’s work and quality of life in the world. Therefore, the effective therapies for eye diseases are of high priority. Zebrafish (Danio rerio) is an alternative vertebrate model as a useful tool for the mechanism elucidation and drug discovery of various eye disorders, such as cataracts, glaucoma, diabetic retinopathy, age-related macular degeneration, photoreceptor degeneration, etc. The genetic and embryonic accessibility of zebrafish in combination with a behavioral assessment of visual function has made it a very popular model in ophthalmology. Zebrafish has also been widely used in ocular drug discovery, such as the screening of new anti-angiogenic compounds or neuroprotective drugs, and the oculotoxicity test. In this review, we summarized the applications of zebrafish as the models of eye disorders to study disease mechanism and investigate novel drug treatments.
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Affiliation(s)
| | - Yan Luo
- Correspondence: ; Tel.: +86-020-87335931
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7
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Dierick F, Solinc J, Bignard J, Soubrier F, Nadaud S. Progenitor/Stem Cells in Vascular Remodeling during Pulmonary Arterial Hypertension. Cells 2021; 10:cells10061338. [PMID: 34071347 PMCID: PMC8226806 DOI: 10.3390/cells10061338] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2021] [Revised: 05/12/2021] [Accepted: 05/21/2021] [Indexed: 12/18/2022] Open
Abstract
Pulmonary arterial hypertension (PAH) is characterized by an important occlusive vascular remodeling with the production of new endothelial cells, smooth muscle cells, myofibroblasts, and fibroblasts. Identifying the cellular processes leading to vascular proliferation and dysfunction is a major goal in order to decipher the mechanisms leading to PAH development. In addition to in situ proliferation of vascular cells, studies from the past 20 years have unveiled the role of circulating and resident vascular in pulmonary vascular remodeling. This review aims at summarizing the current knowledge on the different progenitor and stem cells that have been shown to participate in pulmonary vascular lesions and on the pathways regulating their recruitment during PAH. Finally, this review also addresses the therapeutic potential of circulating endothelial progenitor cells and mesenchymal stem cells.
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Affiliation(s)
- France Dierick
- Lady Davis Institute for Medical Research, McGill University, Montréal, QC H3T 1E2, Canada;
| | - Julien Solinc
- UMR_S 1166, Faculté de Médecine Pitié-Salpêtrière, INSERM, Sorbonne Université, 75013 Paris, France; (J.S.); (J.B.); (F.S.)
| | - Juliette Bignard
- UMR_S 1166, Faculté de Médecine Pitié-Salpêtrière, INSERM, Sorbonne Université, 75013 Paris, France; (J.S.); (J.B.); (F.S.)
| | - Florent Soubrier
- UMR_S 1166, Faculté de Médecine Pitié-Salpêtrière, INSERM, Sorbonne Université, 75013 Paris, France; (J.S.); (J.B.); (F.S.)
| | - Sophie Nadaud
- UMR_S 1166, Faculté de Médecine Pitié-Salpêtrière, INSERM, Sorbonne Université, 75013 Paris, France; (J.S.); (J.B.); (F.S.)
- Correspondence:
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8
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Tahara N, Akiyama R, Wang J, Kawakami H, Bessho Y, Kawakami Y. The FGF-AKT pathway is necessary for cardiomyocyte survival for heart regeneration in zebrafish. Dev Biol 2021; 472:30-37. [PMID: 33444612 DOI: 10.1016/j.ydbio.2020.12.019] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2020] [Revised: 12/12/2020] [Accepted: 12/28/2020] [Indexed: 12/13/2022]
Abstract
Zebrafish have a remarkable ability to regenerate the myocardium after injury by proliferation of pre-existing cardiomyocytes. Fibroblast growth factor (FGF) signaling is known to play a critical role in zebrafish heart regeneration through promotion of neovascularization of the regenerating myocardium. Here, we define an additional function of FGF signaling in the zebrafish myocardium after injury. We find that FGF signaling is active in a small fraction of cardiomyocytes before injury, and that the number of FGF signaling-positive cardiomyocytes increases after amputation-induced injury. We show that ERK phosphorylation is prominent in endothelial cells, but not in cardiomyocytes. In contrast, basal levels of phospho-AKT positive cardiomyocytes are detected before injury, and the ratio of phosphorylated AKT-positive cardiomyocytes increases after injury, indicating a role of AKT signaling in cardiomyocytes following injury. Inhibition of FGF signaling reduced the number of phosphorylated AKT-positive cardiomyocytes and increased cardiomyocyte death without injury. Heart injury did not induce cardiomyocyte death; however, heart injury in combination with inhibition of FGF signaling caused significant increase in cardiomyocyte death. Pharmacological inhibition of AKT signaling after heart injury also caused increased cardiomyocyte death. Our data support the idea that FGF-AKT signaling-dependent cardiomyocyte survival is necessary for subsequent heart regeneration.
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Affiliation(s)
- Naoyuki Tahara
- Department of Genetics, Cell Biology and Development, University of Minnesota, Minneapolis, MN, USA; Stem Cell Institute, University of Minnesota, Minneapolis, MN, USA; Developmental Biology Center, University of Minnesota, Minneapolis, MN, USA
| | - Ryutaro Akiyama
- Department of Genetics, Cell Biology and Development, University of Minnesota, Minneapolis, MN, USA; Stem Cell Institute, University of Minnesota, Minneapolis, MN, USA; Developmental Biology Center, University of Minnesota, Minneapolis, MN, USA; Gene Regulation Research, Division of Biological Science, Graduate School of Science and Technology, Nara Institute of Science and Technology, Ikoma, Japan
| | - Justin Wang
- Department of Genetics, Cell Biology and Development, University of Minnesota, Minneapolis, MN, USA
| | - Hiroko Kawakami
- Department of Genetics, Cell Biology and Development, University of Minnesota, Minneapolis, MN, USA; Stem Cell Institute, University of Minnesota, Minneapolis, MN, USA; Developmental Biology Center, University of Minnesota, Minneapolis, MN, USA
| | - Yasumasa Bessho
- Gene Regulation Research, Division of Biological Science, Graduate School of Science and Technology, Nara Institute of Science and Technology, Ikoma, Japan
| | - Yasuhiko Kawakami
- Department of Genetics, Cell Biology and Development, University of Minnesota, Minneapolis, MN, USA; Stem Cell Institute, University of Minnesota, Minneapolis, MN, USA; Developmental Biology Center, University of Minnesota, Minneapolis, MN, USA.
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9
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Karjosukarso DW, Ali Z, Peters TA, Zhang JQC, Hoogendoorn ADM, Garanto A, van Wijk E, Jensen LD, Collin RWJ. Modeling ZNF408-Associated FEVR in Zebrafish Results in Abnormal Retinal Vasculature. Invest Ophthalmol Vis Sci 2020; 61:39. [PMID: 32097476 PMCID: PMC7329629 DOI: 10.1167/iovs.61.2.39] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
Abstract
Purpose Familial exudative vitreoretinopathy (FEVR) is an inherited retinal disease in which the retinal vasculature is affected. Patients with FEVR typically lack or have abnormal vasculature in the peripheral retina, the outcome of which can range from mild visual impairment to complete blindness. A missense mutation (p.His455Tyr) in ZNF408 was identified in an autosomal dominant FEVR family. Little, however, is known about the molecular role of ZNF408 and how its defect leads to the clinical features of FEVR. Methods Using CRISPR/Cas9 technology, two homozygous mutant zebrafish models with truncated znf408 were generated, as well as one heterozygous and one homozygous missense znf408 model in which the human p.His455Tyr mutation is mimicked. Results Intriguingly, all three znf408-mutant zebrafish strains demonstrated progressive retinal vascular pathology, initially characterized by a deficient hyaloid vessel development at 5 days postfertilization (dpf) leading to vascular insufficiency in the retina. The generation of stable mutant lines allowed long-term follow up studies, which showed ectopic retinal vascular hyper-sprouting at 90 dpf and extensive vascular leakage at 180 dpf. Conclusions Together, our data demonstrate an important role for znf408 in the development and maintenance of the vascular system within the retina.
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10
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Ali Z, Cui D, Yang Y, Tracey-White D, Vazquez-Rodriguez G, Moosajee M, Ju R, Li X, Cao Y, Jensen LD. Synchronized tissue-scale vasculogenesis and ubiquitous lateral sprouting underlie the unique architecture of the choriocapillaris. Dev Biol 2020; 457:206-214. [PMID: 30796893 DOI: 10.1016/j.ydbio.2019.02.002] [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: 09/12/2018] [Revised: 01/27/2019] [Accepted: 02/10/2019] [Indexed: 10/27/2022]
Abstract
The choriocapillaris is an exceptionally high density, two-dimensional, sheet-like capillary network, characterized by the highest exchange rate of nutrients for waste products per area in the organism. These unique morphological and physiological features are critical for supporting the extreme metabolic requirements of the outer retina needed for vision. The developmental mechanisms and processes responsible for generating this unique vascular network remain, however, poorly understood. Here we take advantage of the zebrafish as a model organism for gaining novel insights into the cellular dynamics and molecular signaling mechanisms involved in the development of the choriocapillaris. We show for the first time that zebrafish have a choriocapillaris highly similar to that in mammals, and that it is initially formed by a novel process of synchronized vasculogenesis occurring simultaneously across the entire outer retina. This initial vascular network expands by un-inhibited sprouting angiogenesis whereby all endothelial cells adopt tip-cell characteristics, a process which is sustained throughout embryonic and early post-natal development, even after the choriocapillaris becomes perfused. Ubiquitous sprouting was maintained by continuous VEGF-VEGFR2 signaling in endothelial cells delaying maturation until immediately before stages where vision becomes important for survival, leading to the unparalleled high density and lobular structure of this vasculature. Sprouting was throughout development limited to two dimensions by Bruch's membrane and the sclera at the anterior and posterior surfaces respectively. These novel cellular and molecular mechanisms underlying choriocapillaris development were recapitulated in mice. In conclusion, our findings reveal novel mechanisms underlying the development of the choriocapillaris during zebrafish and mouse development. These results may explain the uniquely high density and sheet-like organization of this vasculature.
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Affiliation(s)
- Zaheer Ali
- Division of Cardiovascular Medicine, Department of Medical and Health Sciences, Linköping University, Linköping, Sweden
| | - Dongmei Cui
- Zhongshan Ophthalmic Center, State Key Laboratory of Ophthalmology, Sun Yat-sen University, Guangzhou, PR China
| | - Yunlong Yang
- Department of Cellular and Genetic Medicine, School of Basic Medical Sciences, Fudan University, Shanghai 200032, PR China; Institute of Pan-vascular Medicine, Fudan University, Shanghai 200032, PR China
| | - Dhani Tracey-White
- Department of Ocular Biology and Therapeutics, UCL Institute of Ophthalmology, London, UK
| | - Gabriela Vazquez-Rodriguez
- Department of Oncology and Department of Clinical and Experimental Medicine, Linköping University, Linköping, Sweden
| | - Mariya Moosajee
- Department of Ocular Biology and Therapeutics, UCL Institute of Ophthalmology, London, UK
| | - Rong Ju
- Zhongshan Ophthalmic Center, State Key Laboratory of Ophthalmology, Sun Yat-sen University, Guangzhou, PR China
| | - Xuri Li
- Zhongshan Ophthalmic Center, State Key Laboratory of Ophthalmology, Sun Yat-sen University, Guangzhou, PR China
| | - Yihai Cao
- Department of Microbiology, Tumor and Cell Biology, Karolinska Institutet, Stockholm, Sweden
| | - Lasse D Jensen
- Division of Cardiovascular Medicine, Department of Medical and Health Sciences, Linköping University, Linköping, Sweden.
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11
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Anticonvulsant action of a selective phosphatidylinositol-3-kinase inhibitor LY294002 in pentylenetetrazole-mediated convulsions in zebrafish. Epilepsy Res 2019; 157:106207. [DOI: 10.1016/j.eplepsyres.2019.106207] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2019] [Revised: 08/18/2019] [Accepted: 09/14/2019] [Indexed: 12/15/2022]
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12
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Pyrazinib (P3), [(E)-2-(2-Pyrazin-2-yl-vinyl)-phenol], a small molecule pyrazine compound enhances radiosensitivity in oesophageal adenocarcinoma. Cancer Lett 2019; 447:115-129. [DOI: 10.1016/j.canlet.2019.01.009] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2018] [Revised: 11/13/2018] [Accepted: 01/07/2019] [Indexed: 02/06/2023]
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13
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Ha JM, Jin SY, Lee HS, Vafaeinik F, Jung YJ, Keum HJ, Song SH, Lee DH, Kim CD, Bae SS. Vascular leakage caused by loss of Akt1 is associated with impaired mural cell coverage. FEBS Open Bio 2019; 9:801-813. [PMID: 30984553 PMCID: PMC6443864 DOI: 10.1002/2211-5463.12621] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2019] [Accepted: 02/22/2019] [Indexed: 12/15/2022] Open
Abstract
Angiogenesis plays a critical role in embryo development, tissue repair, tumor growth and wound healing. In the present study, we investigated the role of the serine/threonine kinase Akt in angiogenesis. Silencing of Akt1 in human umbilical vein endothelial cells significantly inhibited vascular endothelial growth factor (VEGF)-induced capillary-like tube formation. Mice lacking Akt1 exhibited impaired retinal angiogenesis with delayed endothelial cell (EC) proliferation. In addition, VEGF-induced corneal angiogenesis and tumor development were significantly inhibited in mice lacking Akt1. Loss of Akt1 resulted in reduced angiogenic sprouting, as well as the proliferation of ECs and mural cells. Addition of culture supernatant of vascular smooth muscle cells (VSMCs) in which Akt1 was silenced suppressed tube formation, the stability of preformed tubes and the proliferation of ECs. In addition, attachment of VSMCs to ECs was significantly reduced in cells in which Akt1 was silenced. Mural cell coverage of retinal vasculature was reduced in mice lacking Akt1. Finally, mice lacking Akt1 showed severe retinal hemorrhage compared to the wild-type. These results suggest that the regulation of EC function and mural cell coverage by Akt1 is important for blood vessel maturation during angiogenesis.
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Affiliation(s)
- Jung Min Ha
- Biomedical Research Institute Gene and Cell Therapy Center for Vessel Associated Disease Department of Pharmacology Pusan National University School of Medicine Yangsan Korea
| | - Seo Yeon Jin
- Biomedical Research Institute Gene and Cell Therapy Center for Vessel Associated Disease Department of Pharmacology Pusan National University School of Medicine Yangsan Korea
| | - Hye Sun Lee
- Biomedical Research Institute Gene and Cell Therapy Center for Vessel Associated Disease Department of Pharmacology Pusan National University School of Medicine Yangsan Korea
| | - Farzaneh Vafaeinik
- Biomedical Research Institute Gene and Cell Therapy Center for Vessel Associated Disease Department of Pharmacology Pusan National University School of Medicine Yangsan Korea
| | - Yoo Jin Jung
- Biomedical Research Institute Gene and Cell Therapy Center for Vessel Associated Disease Department of Pharmacology Pusan National University School of Medicine Yangsan Korea
| | - Hye Jin Keum
- Biomedical Research Institute Gene and Cell Therapy Center for Vessel Associated Disease Department of Pharmacology Pusan National University School of Medicine Yangsan Korea
| | - Sang Heon Song
- Biomedical Research Institute Department of Internal Medicine Pusan National University Hospital Busan Korea
| | - Dong Hyung Lee
- Department of Gynecology and Obstetrics Pusan National University Yangsan Hospital Korea
| | - Chi Dae Kim
- Biomedical Research Institute Gene and Cell Therapy Center for Vessel Associated Disease Department of Pharmacology Pusan National University School of Medicine Yangsan Korea
| | - Sun Sik Bae
- Biomedical Research Institute Gene and Cell Therapy Center for Vessel Associated Disease Department of Pharmacology Pusan National University School of Medicine Yangsan Korea
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14
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Zhao Y, Zhang K, Sips P, MacRae CA. Screening drugs for myocardial disease in vivo with zebrafish: an expert update. Expert Opin Drug Discov 2019; 14:343-353. [PMID: 30836799 DOI: 10.1080/17460441.2019.1577815] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
INTRODUCTION Our understanding of the complexity of cardiovascular disease pathophysiology remains very incomplete and has hampered cardiovascular drug development over recent decades. The prevalence of cardiovascular diseases and their increasing global burden call for novel strategies to address disease biology and drug discovery. Areas covered: This review describes the recent history of cardiovascular drug discovery using in vivo phenotype-based screening in zebrafish. The rationale for the use of this model is highlighted and the initial efforts in the fields of disease modeling and high-throughput screening are illustrated. Finally, the advantages and limitations of in vivo zebrafish screening are discussed, highlighting newer approaches, such as genome editing technologies, to accelerate our understanding of disease biology and the development of precise disease models. Expert opinion: Full understanding and faithful modeling of specific cardiovascular disease is a rate-limiting step for cardiovascular drug discovery. The resurgence of in vivo phenotype screening together with the advancement of systems biology approaches allows for the identification of lead compounds which show efficacy on integrative disease biology in the absence of validated targets. This strategy bypasses current gaps in knowledge of disease biology and paves the way for successful drug discovery and downstream molecular target identification.
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Affiliation(s)
- Yanbin Zhao
- a School of Environmental Science and Engineering , Shanghai Jiao Tong University , Shanghai , China.,b Shanghai Institute of Pollution Control and Ecological Security, Tongji University , Shanghai , China.,c Cardiovascular Medicine , Brigham and Women's Hospital, Harvard Medical School , Boston , MA , USA
| | - Kun Zhang
- a School of Environmental Science and Engineering , Shanghai Jiao Tong University , Shanghai , China.,b Shanghai Institute of Pollution Control and Ecological Security, Tongji University , Shanghai , China.,c Cardiovascular Medicine , Brigham and Women's Hospital, Harvard Medical School , Boston , MA , USA
| | - Patrick Sips
- d Center for Medical Genetics, Department of Biomolecular Medicine , Ghent University , Ghent , Belgium
| | - Calum A MacRae
- c Cardiovascular Medicine , Brigham and Women's Hospital, Harvard Medical School , Boston , MA , USA
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15
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Ward R, Ali Z, Slater K, Reynolds AL, Jensen LD, Kennedy BN. Pharmacological restoration of visual function in a zebrafish model of von-Hippel Lindau disease. Dev Biol 2019; 457:226-234. [PMID: 30825427 DOI: 10.1016/j.ydbio.2019.02.008] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2018] [Revised: 02/15/2019] [Accepted: 02/15/2019] [Indexed: 02/01/2023]
Abstract
Von Hippel-Lindau (VHL) syndrome is a rare, autosomal dominant disorder, characterised by hypervascularised tumour formation in multiple organ systems. Vision loss associated with retinal capillary hemangioblastomas remains one of the earliest complications of VHL disease. The mortality of Vhl-/- mice in utero restricted modelling of VHL disease in this mammalian model. Zebrafish harbouring a recessive germline mutation in the vhl gene represent a viable, alternative vertebrate model to investigate associated ocular loss-of-function phenotypes. Previous studies reported neovascularisation of the brain, eye and trunk together with oedema in the vhl-/- zebrafish eye. In this study, we demonstrate vhl-/- zebrafish almost entirely lack visual function. Furthermore, hyaloid vasculature networks in the vhl-/- eye are improperly formed and this phenotype is concomitant with development of an ectopic intraretinal vasculature. Sunitinib malate, a multi tyrosine kinase inhibitor, market authorised for cancer, reversed the ocular behavioural and morphological phenotypes observed in vhl-/- zebrafish. We conclude that the zebrafish vhl gene contributes to an endogenous molecular barrier that prevents development of intraretinal vasculature, and that pharmacological intervention with sunitinib can improve visual function and hyaloid vessel patterning while reducing abnormally formed ectopic intraretinal vessels in vhl-/- zebrafish.
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Affiliation(s)
- Rebecca Ward
- UCD School of Biomolecular & Biomedical Science, UCD Conway Institute, University College Dublin, D04 V1W8, Ireland
| | - Zaheer Ali
- Department of Medical and Health Sciences, Division of Cardiovascular Medicine, Department of Medical and Health Sciences, Linköping University, Linköping, Sweden
| | - Kayleigh Slater
- UCD School of Biomolecular & Biomedical Science, UCD Conway Institute, University College Dublin, D04 V1W8, Ireland
| | - Alison L Reynolds
- UCD School of Biomolecular & Biomedical Science, UCD Conway Institute, University College Dublin, D04 V1W8, Ireland; UCD School of Veterinary Medicine, University College Dublin, D04 V1W8, Ireland
| | - Lasse D Jensen
- Department of Medical and Health Sciences, Division of Cardiovascular Medicine, Department of Medical and Health Sciences, Linköping University, Linköping, Sweden
| | - Breandán N Kennedy
- UCD School of Biomolecular & Biomedical Science, UCD Conway Institute, University College Dublin, D04 V1W8, Ireland.
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16
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Di Y, Chen XL. Effects of LY294002 on the function of retinal endothelial cell in vitro. Int J Ophthalmol 2018; 11:1447-1450. [PMID: 30225216 DOI: 10.18240/ijo.2018.09.03] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2018] [Accepted: 05/28/2018] [Indexed: 11/23/2022] Open
Abstract
AIM To study the effects of LY294002 [phosphatidylinositol 3-kinase (PI3K) inhibitor] on the function and mechanisms of retinal endothelial cells (RECs) in vitro. METHODS RECs were randomly divided into control group and LY294002 treatment group. RECs in the control group were placed the incubator for hypoxic exposure in vitro. RECs in the LY294002 treatment group were pretreated with LY294002 (40 µmol/L) under hypoxic condition. The expression of matrix metalloproteinase (MMP)-2, MMP-9, vascular endothelial growth factor (VEGF), and apoptosis and proliferation of RECs were evaluated with Western blot, real-time reverse transcription-polymerase chain reaction (RT-PCR), and flow cytometric analysis, correspondently. RESULTS Compared with the control group, treating the RECs with LY294002 was able to remarkably inhibit cell proliferation rates (t1d=2.13, t2d=2.65, t3d=2.36, t4d=2.06, all P<0.05). Flow cytometric analysis indicated that a moderate increase in apoptosis in the LY294002 treatment group compared to the control group (t=2.51, P<0.05). The expression of MMP-2, MMP-9 and VEGF were downregulated in the LY294002 treatment group by Western blot and real-time RT-PCR (all P<0.05). CONCLUSION LY294002 regulates the function of RECs by reducing the expression of MMP-2, MMP-9, and VEGF in vitro. LY294002 may provide an effective method for preventing pathological angiogenesis.
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Affiliation(s)
- Yu Di
- Department of Ophthalmology, Shengjing Hospital of China Medical University, Shenyang 110004, Liaoning Province, China
| | - Xiao-Long Chen
- Department of Ophthalmology, Shengjing Hospital of China Medical University, Shenyang 110004, Liaoning Province, China
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17
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Di Y, Chen XL. Inhibition of LY294002 in retinal neovascularization via down-regulation the PI3K/AKT-VEGF pathway in vivo and in vitro. Int J Ophthalmol 2018; 11:1284-1289. [PMID: 30140630 DOI: 10.18240/ijo.2018.08.06] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2018] [Accepted: 04/08/2018] [Indexed: 01/01/2023] Open
Abstract
AIM To investigate the effects of the phosphatidylinositol 3-kinase (PI3K) inhibitor LY294002 on retinal neovascularization (RNV) in the oxygen-induced retinopathy (OIR) mouse model and human umbilical vein endothelial cells (HUVECs). METHODS C57BL/6J mice were randomly divided into normoxia-control, OIR-control and LY294002 treatment groups. LY294002 or phosphate-buffered solution was intraperitoneally injected daily into mouse pups from P6 to P9 in LY294002 treatment group or OIR-control group. Morphological and pathological changes in RNV, as well as expression levels of PI3K, serine-threonine kinase (AKT) and vascular endothelial growth factor (VEGF) were observed. HUVECs treating with LY294002 were exposed to hypoxia; the expression of PI3K, AKT and VEGF were examined by Western blot and RT-PCR analyses. RESULTS Compared with the OIR-control group, LY294002 significantly inhibit RNV. Adenosine diphosphatase (ADPase) staining and hematoxylin and eosin staining indicated that the clock hour scores of neovascularization and the nuclei of pre-retinal neovascular cells in the LY294002 treatment group were clearly less than those in the OIR-control group (1.41±0.52 vs 6.20±1.21; 10.50±1.58 vs 22.25±1.82, both P<0.05). Intravitreal injection of LY294002 (in the LY294002 treatment group) markedly decreased PI3K/AKT-VEGF expression compared with the OIR-control group by immunohistochemistry, Western blotting and RT-PCR (all P<0.05). In HUVECs treated with hypoxia, expression of PI3K, AKT and VEGF were downregulated in the hypoxia-LY294002 group (all P<0.05). CONCLUSION The PI3K inhibitor LY294002 can inhibit RNV by downregulating PI3K, AKT, and VEGF expression in vivo and in vitro. LY294002 may provide an effective method for preventing retinopathy of prematurity (ROP).
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Affiliation(s)
- Yu Di
- Department of Ophthalmology, Shengjing Affiliated Hospital, China Medical University, Shenyang 110004, Liaoning Province, China
| | - Xiao-Long Chen
- Department of Ophthalmology, Shengjing Affiliated Hospital, China Medical University, Shenyang 110004, Liaoning Province, China
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18
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Kithcart AP, MacRae CA. Zebrafish assay development for cardiovascular disease mechanism and drug discovery. PROGRESS IN BIOPHYSICS AND MOLECULAR BIOLOGY 2018; 138:126-131. [PMID: 30518489 DOI: 10.1016/j.pbiomolbio.2018.07.002] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/07/2018] [Revised: 06/26/2018] [Accepted: 07/01/2018] [Indexed: 12/15/2022]
Affiliation(s)
| | - Calum A MacRae
- Brigham and Women's Hospital, Harvard Medical School, USA.
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19
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Shen M, Zhou XZ, Ye L, Yuan Q, Shi C, Zhu PW, Jiang N, Ma MY, Yang QC, Shao Y. Xanthatin inhibits corneal neovascularization by inhibiting the VEGFR2‑mediated STAT3/PI3K/Akt signaling pathway. Int J Mol Med 2018; 42:769-778. [PMID: 29717775 PMCID: PMC6034915 DOI: 10.3892/ijmm.2018.3646] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2017] [Accepted: 04/26/2018] [Indexed: 12/11/2022] Open
Abstract
Alkali burn is one of the main causes of corneal injury. The inflammation and neovascularization caused by alkali burns aggravate corneal damage, resulting in loss of vision. The aim of the present study was to evaluate the efficacy of xanthatin in the treatment of alkali burn-induced inflammation and neovascularization. A CCK-8 assay was used to detect the effects of different concentrations of xanthatin on the proliferation of human umbilical vein endothelial cells (HUVECs). The effects of xanthatin on the migration of HUVECs and the ability of lumen formation were examined using a scratch test and lumen formation assay, respectively. A total of 60 Sprague-Dawley rats were randomly divided into two groups to establish a corneal alkali burn model, and were treated with PBS and xanthatin eye drops four times a day. A slit lamp microscope recorded changes of the cornea at 0, 4, 7, 10 and 14 days, and the inflammatory indices of the cornea and the neovascular area were evaluated. The expression levels of vascular endothelial growth factor (VEGF) and pigment epithelium-derived factor (PEDF) in the cornea under different treatment conditions were detected using immunofluorescence and western blot analysis. In order to investigate the mechanism of xanthatin on the inhibition of inflammation and neovascularization, HUVECs were treated with xanthatin and PBS following VEGF treatment. The subcellular localization of signal transducer and activator of transcription 3 (STAT3) was detected using immunofluorescence. The expression levels of VEGF receptor 2 (VEGFR2), STAT3, phosphoinositide 3-kinase (PI3K) and Akt were detected using western blot analysis. The results revealed that xanthatin inhibited the proliferation of HUVECs in a concentration-dependent manner. The migration ability and lumen-forming ability of the HUVECs were also inhibited by xanthatin. Slit lamp microscopy showed that the inflammatory index and the area of neovascularization in the xanthatin-treated group were significantly reduced, compared with those in the PBS treatment group. The xanthatin treatment group exhibited a lower protein expression level of VEGF and increased protein expression level of PEDF, compared with the PBS treatment group. In the VEGF-treated HUVECs, xanthatin significantly decreased the expression levels of p-VEGFR2, phosphorylated (p-)STAT3, p-PI3K and p-Akt. In conclusion, the present study confirmed that xanthatin inhibited corneal neovascularization and inflammation in the alkali burn model, elucidating the underlying mechanisms involved in its protective effects. Therefore, xanthatin may be a novel drug for the treatment of corneal alkali burn.
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Affiliation(s)
- Mei Shen
- Department of Ophthalmology, The First Affiliated Hospital of Nanchang University, Jiangxi Province Clinical Ophthalmology Institute, Nanchang, Jiangxi 330006, P.R. China
| | - Xue-Zhi Zhou
- Department of Ophthalmology, Xiangya Hospital, Central South University, Changsha, Hunan 410008, P.R. China
| | - Lei Ye
- Department of Ophthalmology, The First Affiliated Hospital of Nanchang University, Jiangxi Province Clinical Ophthalmology Institute, Nanchang, Jiangxi 330006, P.R. China
| | - Qing Yuan
- Department of Ophthalmology, The First Affiliated Hospital of Nanchang University, Jiangxi Province Clinical Ophthalmology Institute, Nanchang, Jiangxi 330006, P.R. China
| | - Ce Shi
- School of Ophthalmology and Optometry, Wenzhou Medical University, Wenzhou, Zhejiang 325035, P.R. China
| | - Pei-Wen Zhu
- Department of Ophthalmology, The First Affiliated Hospital of Nanchang University, Jiangxi Province Clinical Ophthalmology Institute, Nanchang, Jiangxi 330006, P.R. China
| | - Nan Jiang
- Department of Ophthalmology, The First Affiliated Hospital of Nanchang University, Jiangxi Province Clinical Ophthalmology Institute, Nanchang, Jiangxi 330006, P.R. China
| | - Ming-Yang Ma
- Department of Ophthalmology, The First Affiliated Hospital of Nanchang University, Jiangxi Province Clinical Ophthalmology Institute, Nanchang, Jiangxi 330006, P.R. China
| | - Qi-Chen Yang
- Eye Institute of Xiamen University, Xiamen, Fujian 361102, P.R. China
| | - Yi Shao
- Department of Ophthalmology, The First Affiliated Hospital of Nanchang University, Jiangxi Province Clinical Ophthalmology Institute, Nanchang, Jiangxi 330006, P.R. China
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20
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Miyata Y, Nagase T, Katsura Y, Takahashi H, Natsugari H, Oshitari T, Kosano H. In vitro studies on nobiletin isolated from citrus plants and the bioactive metabolites, inhibitory action against gelatinase enzymatic activity and the molecular mechanisms in human retinal Müller cell line. Biomed Pharmacother 2018. [PMID: 28623785 DOI: 10.1016/j.biopha.2017.06.017] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023] Open
Abstract
Diabetic retinopathy (DR) is the most common cause of vision loss in patients with diabetes mellitus. Despite the presence of effective therapy, DR is still a significant health burden. A recent research suggests that matrix metalloproteinases (MMPs) could be promising targets, which exert multiple actions on early- and late-stage pathogenesis of DR. Among the MMP family, gelatinases (MMP-2 and MMP-9) act as potent proinflammatory, proangiogenic, and pro-apoptotic factors. Therefore, the pharmacological inhibitory effect of gelatinases on retinal MMP-producing cells may be useful in the treatment or prevention of DR. Nobiletin isolated from citrus plants is a multi-functional polymethoxylated flavone, which exerts biological effects including inhibitory action against MMP activity in several cancer cells. In the present study, we demonstrated that nobiletin isolated from citrus plants attenuated MMP-9 enzymatic activity through the suppression of transcription for MMP-9 gene expression and augmentation of TIMP-1 production in retinal Müller cells. Nobiletin regulated MMP-9 gene expression and TIMP-1 by inhibiting the PI3K/Akt signaling pathway. In addition, we observed the augmentation of inhibitory action against MMP-9 enzymatic activity by 4'-demethylated nobiletin, which is a major metabolite of nobiletin. We believe that the enhancement of inhibitory action against MMP-9 enzymatic activity by 4'-demethylated nobiletin is through the dual inhibition on Erk1/2 and Akt phosphorylation. The structure-activity relationship analysis revealed that, for the enhancement of inhibitory action against MMP-9 enzymatic activity, demethylation at position 4' in B-ring was a key structural modification in Müller cells, which are an important source of MMPs found in vitreous fluid and retinal tissues in retinal proliferative diseases. These results suggested that nobiletin, derived from a natural source, may serve as a novel MMP inhibitor with minimal side effects, and lead compound for the design of more efficacious drugs.
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Affiliation(s)
- Yoshiki Miyata
- Faculty of Pharma-Sciences, Teikyo University, 2-11-1 Kaga, Itabashi-ku, Tokyo 173-8605, Japan
| | - Terumasa Nagase
- The fifth Department of Internal Medicine, Tokyo Medical University, 3-20-1 Ami, Ibaraki 300-0332, Japan
| | - Yoshiya Katsura
- The fifth Department of Internal Medicine, Tokyo Medical University, 3-20-1 Ami, Ibaraki 300-0332, Japan
| | - Hideyo Takahashi
- Faculty of Pharma-Sciences, Teikyo University, 2-11-1 Kaga, Itabashi-ku, Tokyo 173-8605, Japan.
| | - Hideaki Natsugari
- Faculty of Pharma-Sciences, Teikyo University, 2-11-1 Kaga, Itabashi-ku, Tokyo 173-8605, Japan
| | - Tetsuta Oshitari
- Faculty of Pharma-Sciences, Teikyo University, 2-11-1 Kaga, Itabashi-ku, Tokyo 173-8605, Japan
| | - Hiroshi Kosano
- Faculty of Pharma-Sciences, Teikyo University, 2-11-1 Kaga, Itabashi-ku, Tokyo 173-8605, Japan
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21
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Rezzola S, Nawaz IM, Cancarini A, Ravelli C, Calza S, Semeraro F, Presta M. 3D endothelial cell spheroid/human vitreous humor assay for the characterization of anti-angiogenic inhibitors for the treatment of proliferative diabetic retinopathy. Angiogenesis 2017; 20:629-640. [PMID: 28905243 DOI: 10.1007/s10456-017-9575-4] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2017] [Accepted: 09/04/2017] [Indexed: 12/27/2022]
Abstract
Proliferative diabetic retinopathy (PDR) represents a main cause of acquired blindness. Despite the recognition of the key role exerted by vascular endothelial growth factor (VEGF) in the pathogenesis of PDR, limitations to anti-VEGF therapies do exist. Thus, rapid and cost-effective angiogenesis assays are crucial for the screening of anti-angiogenic drug candidates for PDR therapy. In this context, evaluation of the angiogenic potential of PDR vitreous fluid may represent a valuable tool for preclinical assessment of angiostatic molecules. Here, vitreous fluid obtained from PDR patients after pars plana vitrectomy was used as a pro-angiogenic stimulus in a 3D endothelial cell spheroid/human vitreous assay. The results show that PDR vitreous is able to stimulate the sprouting of fibrin-embedded HUVEC spheroids in a time- and dose-dependent manner. A remarkable variability was observed among 40 individual vitreous fluid samples in terms of sprouting-inducing activity that was related, at least in part, to defined clinical features of the PDR patient. This activity was hampered by various extracellular and intracellular signaling pathway inhibitors, including the VEGF antagonist ranibizumab. When tested on 20 individual vitreous fluid samples, the inhibitory activity of ranibizumab ranged between 0 and 100% of the activity measured in the absence of the drug, reflecting a variable contribution of angiogenic mediators distinct from VEGF. In conclusion, the 3D endothelial cell spheroid/human vitreous assay represents a rapid and cost-effective experimental procedure suitable for the evaluation of the anti-angiogenic activity of novel extracellular and intracellular drug candidates, with possible implications for the therapy of PDR.
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Affiliation(s)
- Sara Rezzola
- Department of Molecular and Translational Medicine, University of Brescia, viale Europa 11, 25123, Brescia, Italy
| | - Imtiaz M Nawaz
- Department of Molecular and Translational Medicine, University of Brescia, viale Europa 11, 25123, Brescia, Italy
| | - Anna Cancarini
- Department of Ophthalmology, University of Brescia, Piazzale Spedali Civili 1, 25123, Brescia, Italy
| | - Cosetta Ravelli
- Department of Molecular and Translational Medicine, University of Brescia, viale Europa 11, 25123, Brescia, Italy
| | - Stefano Calza
- Department of Molecular and Translational Medicine, University of Brescia, viale Europa 11, 25123, Brescia, Italy
| | - Francesco Semeraro
- Department of Ophthalmology, University of Brescia, Piazzale Spedali Civili 1, 25123, Brescia, Italy.
| | - Marco Presta
- Department of Molecular and Translational Medicine, University of Brescia, viale Europa 11, 25123, Brescia, Italy.
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22
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Merrigan SL, Kennedy BN. Vitamin D receptor agonists regulate ocular developmental angiogenesis and modulate expression of dre-miR-21 and VEGF. Br J Pharmacol 2017; 174:2636-2651. [PMID: 28547797 DOI: 10.1111/bph.13875] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2017] [Revised: 04/26/2017] [Accepted: 05/15/2017] [Indexed: 12/31/2022] Open
Abstract
BACKGROUND AND PURPOSE Pathological growth of ocular vasculature networks can underpin visual impairment in neovascular age-related macular degeneration, proliferative diabetic retinopathy and retinopathy of prematurity. Our aim was to uncover novel pharmacological regulators of ocular angiogenesis by phenotype-based screening in zebrafish. EXPERIMENTAL APPROACH A bioactive chemical library of 465 drugs was screened to identify small molecule inhibitors of ocular hyaloid vasculature (HV) angiogenesis in zebrafish larvae. Selectivity was assessed by evaluation of non-ocular intersegmental vasculature development. Safety pharmacology examined visual behaviour and retinal histology in larvae. Molecular mechanisms of action were scrutinized using expression profiling of target mRNAs and miRNAs in larval eyes. KEY RESULTS Library screening identified 10 compounds which significantly inhibited HV developmental angiogenesis. The validated hit calcitriol selectively demonstrated dose-dependent attenuation of HV development. In agreement, vitamin D receptor (VDR) agonists paricalcitol, doxercalciferol, maxacalcitol, calcipotriol, seocalcitol, calcifediol and tacalcitol significantly and selectively attenuated HV development. VDR agonists induced minor ocular morphology abnormalities and affected normal visual function. Calcitriol induced a three to sevenfold increase in ocular dre-miR-21 expression. Consistently, all-trans-retinoic acid attenuated HV development and increased ocular dre-miR-21 expression. Interestingly, zebrafish ocular vegfaa and vegfab expression was significantly increased while, vegfc, flt1 and kdrl expression was unchanged by calcitriol. CONCLUSION AND IMPLICATIONS These studies identified VDR agonists as significant and selective anti-angiogenics in the developing vertebrate eye and miR21 as a key downstream regulated miRNA. These targets should be further evaluated as molecular hallmarks of, and therapeutic targets for pathological ocular neovascularization.
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Affiliation(s)
- Stephanie L Merrigan
- UCD School of Biomolecular and Biomedical Science, UCD Conway Institute, University College Dublin, Dublin, Ireland
| | - Breandán N Kennedy
- UCD School of Biomolecular and Biomedical Science, UCD Conway Institute, University College Dublin, Dublin, Ireland
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23
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Perugini V, Guildford AL, Silva-Correia J, Oliveira JM, Meikle ST, Reis RL, Santin M. Anti-angiogenic potential of VEGF blocker dendron loaded on to gellan gum hydrogels for tissue engineering applications. J Tissue Eng Regen Med 2017; 12:e669-e678. [PMID: 27718530 DOI: 10.1002/term.2340] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2016] [Revised: 08/03/2016] [Accepted: 09/26/2016] [Indexed: 12/26/2022]
Abstract
Damage of non-vascularised tissues such as cartilage and cornea can result in healing processes accompanied by a non-physiological angiogenesis. Peptidic aptamers have recently been reported to block the vascular endothelial growth factor (VEGF). However, the therapeutic applications of these aptamers are limited due to their short half-life in vivo. In this work, an enhanced stability and bioavailability of a known VEGF blocker aptamer sequence (WHLPFKC) was pursued through its tethering of molecular scaffolds based on hyperbranched peptides, the poly(ɛ-lysine) dendrons, bearing three branching generations. The proposed design allowed simultaneous and orderly-spaced exposure of 16 aptamers per dendrimer to the surrounding biological microenvironent, as well as a relatively hydrophobic core based on di-phenylalanine aiming to promote an hydrophobic interaction with the hydrophobic moieties of ionically crosslinked methacrylated gellan gum (iGG-MA) hydrogels. The VEGF blocker dendrons were entrapped in iGG-MA hydrogels, and their capacity to prevent endothelial cell sprouting was assessed qualitatively and quantitatively using 3D in vitro models and the in vivo chick chorioallantoic membrane assay. The data demonstrate that at nanoscale concentrations, the dendronised structures were able to enhance control of the biological actvity of WHLPFKC at the material/tissue interface and hence the anti-angiogenic capacity of iGG-MA hydrogels not only preventing blood vessel invasion, but also inducing their regression at the tissue/iGG-MA interface. The in ovo study confirmed that iGG-MA functionalised with the dendron VEGF blockers do inhibit angiogenesis by controlling both size and ramifications of blood vessels in the proximity of the implanted gel surface. Copyright © 2016 John Wiley & Sons, Ltd.
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Affiliation(s)
- Valeria Perugini
- Brighton Studies in Tissue-mimicry and Aided Regeneration, Brighton Centre for Regenerative Medicine, School of Pharmacy and Biomolecular Sciences, University of Brighton, Brighton, Huxely Building Lewes Road, UK
| | - Anna L Guildford
- Brighton Studies in Tissue-mimicry and Aided Regeneration, Brighton Centre for Regenerative Medicine, School of Pharmacy and Biomolecular Sciences, University of Brighton, Brighton, Huxely Building Lewes Road, UK
| | - Joana Silva-Correia
- 3B's Research Group - Biomaterials, Biodegradables and Biomimetics, University of Minho, Headquarters of the European Institute of Excellence on Tissue Engineering and Regenerative Medicine, AvePark, Parque de Ciência e Tecnologia, Zona Industrial da Gandra, 4805-017 Barco, Guimarães, Portugal.,ICVS/3B's - PT Government Associate Laboratory, Braga/Guimarães, Portugal
| | - Joaquim M Oliveira
- 3B's Research Group - Biomaterials, Biodegradables and Biomimetics, University of Minho, Headquarters of the European Institute of Excellence on Tissue Engineering and Regenerative Medicine, AvePark, Parque de Ciência e Tecnologia, Zona Industrial da Gandra, 4805-017 Barco, Guimarães, Portugal.,ICVS/3B's - PT Government Associate Laboratory, Braga/Guimarães, Portugal
| | - Steven T Meikle
- Brighton Studies in Tissue-mimicry and Aided Regeneration, Brighton Centre for Regenerative Medicine, School of Pharmacy and Biomolecular Sciences, University of Brighton, Brighton, Huxely Building Lewes Road, UK
| | - Rui L Reis
- 3B's Research Group - Biomaterials, Biodegradables and Biomimetics, University of Minho, Headquarters of the European Institute of Excellence on Tissue Engineering and Regenerative Medicine, AvePark, Parque de Ciência e Tecnologia, Zona Industrial da Gandra, 4805-017 Barco, Guimarães, Portugal.,ICVS/3B's - PT Government Associate Laboratory, Braga/Guimarães, Portugal
| | - Matteo Santin
- Brighton Studies in Tissue-mimicry and Aided Regeneration, Brighton Centre for Regenerative Medicine, School of Pharmacy and Biomolecular Sciences, University of Brighton, Brighton, Huxely Building Lewes Road, UK
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24
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Wiley DS, Redfield SE, Zon LI. Chemical screening in zebrafish for novel biological and therapeutic discovery. Methods Cell Biol 2016; 138:651-679. [PMID: 28129862 DOI: 10.1016/bs.mcb.2016.10.004] [Citation(s) in RCA: 78] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
Zebrafish chemical screening allows for an in vivo assessment of small molecule modulation of biological processes. Compound toxicities, chemical alterations by metabolism, pharmacokinetic and pharmacodynamic properties, and modulation of cell niches can be studied with this method. Furthermore, zebrafish screening is straightforward and cost effective. Zebrafish provide an invaluable platform for novel therapeutic discovery through chemical screening.
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Affiliation(s)
- D S Wiley
- Stem Cell Program and Division of Hematology and Oncology, Childrens' Hospital Boston, Dana-Farber Cancer Institute, Howard Hughes Medical Institute and Harvard Medical School, Boston, MA, United States
| | - S E Redfield
- Stem Cell Program and Division of Hematology and Oncology, Childrens' Hospital Boston, Dana-Farber Cancer Institute, Howard Hughes Medical Institute and Harvard Medical School, Boston, MA, United States
| | - L I Zon
- Stem Cell Program and Division of Hematology and Oncology, Childrens' Hospital Boston, Dana-Farber Cancer Institute, Howard Hughes Medical Institute and Harvard Medical School, Boston, MA, United States
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25
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Tal T, Kilty C, Smith A, LaLone C, Kennedy B, Tennant A, McCollum CW, Bondesson M, Knudsen T, Padilla S, Kleinstreuer N. Screening for angiogenic inhibitors in zebrafish to evaluate a predictive model for developmental vascular toxicity. Reprod Toxicol 2016; 70:70-81. [PMID: 28007540 DOI: 10.1016/j.reprotox.2016.12.004] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2016] [Revised: 12/06/2016] [Accepted: 12/16/2016] [Indexed: 01/21/2023]
Abstract
Chemically-induced vascular toxicity during embryonic development may cause a wide range of adverse effects. To identify putative vascular disrupting chemicals (pVDCs), a predictive pVDC signature was constructed from 124 U.S. EPA ToxCast high-throughput screening (HTS) assays and used to rank 1060 chemicals for their potential to disrupt vascular development. Thirty-seven compounds were selected for targeted testing in transgenic Tg(kdrl:EGFP) and Tg(fli1:EGFP) zebrafish embryos to identify chemicals that impair developmental angiogenesis. We hypothesized that zebrafish angiogenesis toxicity data would correlate with human cell-based and cell-free in vitro HTS ToxCast data. Univariate statistical associations used to filter HTS data based on correlations with zebrafish angiogenic inhibition in vivo revealed 132 total significant associations, 33 of which were already captured in the pVDC signature, and 689 non-significant assay associations. Correlated assays were enriched in cytokine and extracellular matrix pathways. Taken together, the findings indicate the utility of zebrafish assays to evaluate an HTS-based predictive toxicity signature and also provide an experimental basis for expansion of the pVDC signature with novel HTS assays.
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Affiliation(s)
| | - Claire Kilty
- UCD School of Biomolecular and Biomedical Science, Conway Institute, University College Dublin, Dublin, Ireland
| | - Andrew Smith
- UCD School of Biomolecular and Biomedical Science, Conway Institute, University College Dublin, Dublin, Ireland
| | | | - Brendán Kennedy
- UCD School of Biomolecular and Biomedical Science, Conway Institute, University College Dublin, Dublin, Ireland
| | | | - Catherine W McCollum
- Center for Nuclear Receptors and Cell Signaling, University of Houston, Houston, TX, USA
| | - Maria Bondesson
- Center for Nuclear Receptors and Cell Signaling, University of Houston, Houston, TX, USA; Department of Pharmacological and Pharmaceutical Sciences, University of Houston, Houston, TX, USA
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26
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Richardson R, Tracey-White D, Webster A, Moosajee M. The zebrafish eye-a paradigm for investigating human ocular genetics. Eye (Lond) 2016; 31:68-86. [PMID: 27612182 DOI: 10.1038/eye.2016.198] [Citation(s) in RCA: 112] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2016] [Accepted: 06/17/2016] [Indexed: 01/13/2023] Open
Abstract
Although human epidemiological and genetic studies are essential to elucidate the aetiology of normal and aberrant ocular development, animal models have provided us with an understanding of the pathogenesis of multiple developmental ocular malformations. Zebrafish eye development displays in depth molecular complexity and stringent spatiotemporal regulation that incorporates developmental contributions of the surface ectoderm, neuroectoderm and head mesenchyme, similar to that seen in humans. For this reason, and due to its genetic tractability, external fertilisation, and early optical clarity, the zebrafish has become an invaluable vertebrate system to investigate human ocular development and disease. Recently, zebrafish have been at the leading edge of preclinical therapy development, with their amenability to genetic manipulation facilitating the generation of robust ocular disease models required for large-scale genetic and drug screening programmes. This review presents an overview of human and zebrafish ocular development, genetic methodologies employed for zebrafish mutagenesis, relevant models of ocular disease, and finally therapeutic approaches, which may have translational leads in the future.
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Affiliation(s)
- R Richardson
- Department of Ocular Biology and Therapeutics, UCL Institute of Ophthalmology, London, UK
| | - D Tracey-White
- Department of Ocular Biology and Therapeutics, UCL Institute of Ophthalmology, London, UK
| | - A Webster
- Department of Ocular Biology and Therapeutics, UCL Institute of Ophthalmology, London, UK.,NIHR Biomedical Research Centre for Ophthalmology, Moorfields Eye Hospital NHS Foundation Trust, London, UK
| | - M Moosajee
- Department of Ocular Biology and Therapeutics, UCL Institute of Ophthalmology, London, UK.,NIHR Biomedical Research Centre for Ophthalmology, Moorfields Eye Hospital NHS Foundation Trust, London, UK
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27
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Rezzola S, Paganini G, Semeraro F, Presta M, Tobia C. Zebrafish ( Danio rerio ) embryo as a platform for the identification of novel angiogenesis inhibitors of retinal vascular diseases. Biochim Biophys Acta Mol Basis Dis 2016; 1862:1291-6. [DOI: 10.1016/j.bbadis.2016.04.009] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2016] [Revised: 04/05/2016] [Accepted: 04/11/2016] [Indexed: 12/26/2022]
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28
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Galvin O, Srivastava A, Carroll O, Kulkarni R, Dykes S, Vickers S, Dickinson K, Reynolds AL, Kilty C, Redmond G, Jones R, Cheetham S, Pandit A, Kennedy BN. A sustained release formulation of novel quininib-hyaluronan microneedles inhibits angiogenesis and retinal vascular permeability in vivo. J Control Release 2016; 233:198-207. [DOI: 10.1016/j.jconrel.2016.04.004] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2015] [Revised: 04/01/2016] [Accepted: 04/04/2016] [Indexed: 12/17/2022]
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29
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Sulaiman RS, Merrigan S, Quigley J, Qi X, Lee B, Boulton ME, Kennedy B, Seo SY, Corson TW. A novel small molecule ameliorates ocular neovascularisation and synergises with anti-VEGF therapy. Sci Rep 2016; 6:25509. [PMID: 27148944 PMCID: PMC4857741 DOI: 10.1038/srep25509] [Citation(s) in RCA: 49] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2015] [Accepted: 04/18/2016] [Indexed: 01/18/2023] Open
Abstract
Ocular neovascularisation underlies blinding eye diseases such as retinopathy of prematurity, proliferative diabetic retinopathy, and wet age-related macular degeneration. These diseases cause irreversible vision loss, and provide a significant health and economic burden. Biologics targeting vascular endothelial growth factor (VEGF) are the major approach for treatment. However, up to 30% of patients are non-responsive to these drugs and they are associated with ocular and systemic side effects. Therefore, there is a need for small molecule ocular angiogenesis inhibitors to complement existing therapies. We examined the safety and therapeutic potential of SH-11037, a synthetic derivative of the antiangiogenic homoisoflavonoid cremastranone, in models of ocular neovascularisation. SH-11037 dose-dependently suppressed angiogenesis in the choroidal sprouting assay ex vivo and inhibited ocular developmental angiogenesis in zebrafish larvae. Additionally, intravitreal SH-11037 (1 μM) significantly reduced choroidal neovascularisation (CNV) lesion volume in the laser-induced CNV mouse model, comparable to an anti-VEGF antibody. Moreover, SH-11037 synergised with anti-VEGF treatments in vitro and in vivo. Up to 100 μM SH-11037 was not associated with signs of ocular toxicity and did not interfere with retinal function or pre-existing retinal vasculature. SH-11037 is thus a safe and effective treatment for murine ocular neovascularisation, worthy of further mechanistic and pharmacokinetic evaluation.
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Affiliation(s)
- Rania S Sulaiman
- Eugene and Marilyn Glick Eye Institute, Department of Ophthalmology, Indiana University School of Medicine, Indianapolis, Indiana 46202, United States of America.,Department of Pharmacology and Toxicology, Indiana University School of Medicine, Indianapolis, Indiana 46202, United States of America.,Department of Biochemistry, Faculty of Pharmacy, Cairo University, Cairo, Egypt
| | - Stephanie Merrigan
- School of Biomolecular and Biomedical Science, Conway Institute, University College Dublin, Dublin 4, Ireland
| | - Judith Quigley
- Eugene and Marilyn Glick Eye Institute, Department of Ophthalmology, Indiana University School of Medicine, Indianapolis, Indiana 46202, United States of America
| | - Xiaoping Qi
- Eugene and Marilyn Glick Eye Institute, Department of Ophthalmology, Indiana University School of Medicine, Indianapolis, Indiana 46202, United States of America
| | - Bit Lee
- College of Pharmacy, Gachon University, Incheon 406-840, South Korea
| | - Michael E Boulton
- Eugene and Marilyn Glick Eye Institute, Department of Ophthalmology, Indiana University School of Medicine, Indianapolis, Indiana 46202, United States of America.,Department of Biochemistry and Molecular Biology, Indiana University School of Medicine, Indianapolis, Indiana 46202, United States of America
| | - Breandán Kennedy
- School of Biomolecular and Biomedical Science, Conway Institute, University College Dublin, Dublin 4, Ireland
| | - Seung-Yong Seo
- College of Pharmacy, Gachon University, Incheon 406-840, South Korea
| | - Timothy W Corson
- Eugene and Marilyn Glick Eye Institute, Department of Ophthalmology, Indiana University School of Medicine, Indianapolis, Indiana 46202, United States of America.,Department of Pharmacology and Toxicology, Indiana University School of Medicine, Indianapolis, Indiana 46202, United States of America.,Department of Biochemistry and Molecular Biology, Indiana University School of Medicine, Indianapolis, Indiana 46202, United States of America
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30
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Park H, Lee S, Shrestha P, Kim J, Park JA, Ko Y, Ban YH, Park DY, Ha SJ, Koh GY, Hong VS, Mochizuki N, Kim YM, Lee W, Kwon YG. AMIGO2, a novel membrane anchor of PDK1, controls cell survival and angiogenesis via Akt activation. J Cell Biol 2016; 211:619-37. [PMID: 26553931 PMCID: PMC4639856 DOI: 10.1083/jcb.201503113] [Citation(s) in RCA: 46] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/05/2022] Open
Abstract
AMIGO2 is a novel scaffold protein that regulates PDK1 membrane localization and Akt activation in endothelial cells, and inhibition of the interaction between PDK1–AMIGO2 results in impaired neovascularization, pathological angiogenesis, and tumor angiogenesis. The phosphoinositide 3-kinase–Akt signaling pathway is essential to many biological processes, including cell proliferation, survival, metabolism, and angiogenesis, under pathophysiological conditions. Although 3-phosphoinositide–dependent kinase 1 (PDK1) is a primary activator of Akt at the plasma membrane, the optimal activation mechanism remains unclear. We report that adhesion molecule with IgG-like domain 2 (AMIGO2) is a novel scaffold protein that regulates PDK1 membrane localization and Akt activation. Loss of AMIGO2 in endothelial cells (ECs) led to apoptosis and inhibition of angiogenesis with Akt inactivation. Amino acid residues 465–474 in AMIGO2 directly bind to the PDK1 pleckstrin homology domain. A synthetic peptide containing the AMIGO2 465–474 residues abrogated the AMIGO2–PDK1 interaction and Akt activation. Moreover, it effectively suppressed pathological angiogenesis in murine tumor and oxygen-induced retinopathy models. These results demonstrate that AMIGO2 is an important regulator of the PDK1–Akt pathway in ECs and suggest that interference of the PDK1–AMIGO2 interaction might be a novel pharmaceutical target for designing an Akt pathway inhibitor.
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Affiliation(s)
- Hyojin Park
- Department of Biochemistry, College of Life Science and Biotechnology, Yonsei University, Seoul 03722, Republic of Korea
| | - Sungwoon Lee
- Department of Biochemistry, College of Life Science and Biotechnology, Yonsei University, Seoul 03722, Republic of Korea
| | - Pravesh Shrestha
- Department of Biochemistry, College of Life Science and Biotechnology, Yonsei University, Seoul 03722, Republic of Korea
| | - Jihye Kim
- Department of Biochemistry, College of Life Science and Biotechnology, Yonsei University, Seoul 03722, Republic of Korea
| | - Jeong Ae Park
- Department of Biochemistry, College of Life Science and Biotechnology, Yonsei University, Seoul 03722, Republic of Korea
| | - Yeongrim Ko
- Department of Biochemistry, College of Life Science and Biotechnology, Yonsei University, Seoul 03722, Republic of Korea
| | - Young Ho Ban
- Department of Biochemistry, College of Life Science and Biotechnology, Yonsei University, Seoul 03722, Republic of Korea
| | - Dae-Young Park
- Graduate School of Medical Science and Engineering, Korea Advanced Institute of Science and Technology, Daejeon 34141, Republic of Korea
| | - Sang-Jun Ha
- Department of Biochemistry, College of Life Science and Biotechnology, Yonsei University, Seoul 03722, Republic of Korea
| | - Gou Young Koh
- Graduate School of Medical Science and Engineering, Korea Advanced Institute of Science and Technology, Daejeon 34141, Republic of Korea
| | - Victor Sukbong Hong
- College of Natural Sciences, Keimyung University, Daegu 42601, Republic of Korea
| | - Naoki Mochizuki
- Department of Cell Biology, National Cerebral and Cardiovascular Center Research Institute, Suita, Osaka 565-8565, Japan
| | - Young-Myeong Kim
- Vascular System Research Center, Kangwon National University, Chuncheon, Kangwon 24341, Republic of Korea
| | - Weontae Lee
- Department of Biochemistry, College of Life Science and Biotechnology, Yonsei University, Seoul 03722, Republic of Korea
| | - Young-Guen Kwon
- Department of Biochemistry, College of Life Science and Biotechnology, Yonsei University, Seoul 03722, Republic of Korea
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31
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Reynolds AL, Alvarez Y, Sasore T, Waghorne N, Butler CT, Kilty C, Smith AJ, McVicar C, Wong VHY, Galvin O, Merrigan S, Osman J, Grebnev G, Sjölander A, Stitt AW, Kennedy BN. Phenotype-based Discovery of 2-[(E)-2-(Quinolin-2-yl)vinyl]phenol as a Novel Regulator of Ocular Angiogenesis. J Biol Chem 2016; 291:7242-55. [PMID: 26846851 DOI: 10.1074/jbc.m115.710665] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2015] [Indexed: 12/21/2022] Open
Abstract
Retinal angiogenesis is tightly regulated to meet oxygenation and nutritional requirements. In diseases such as proliferative diabetic retinopathy and neovascular age-related macular degeneration, uncontrolled angiogenesis can lead to blindness. Our goal is to better understand the molecular processes controlling retinal angiogenesis and discover novel drugs that inhibit retinal neovascularization. Phenotype-based chemical screens were performed using the ChemBridge Diverset(TM)library and inhibition of hyaloid vessel angiogenesis in Tg(fli1:EGFP) zebrafish. 2-[(E)-2-(Quinolin-2-yl)vinyl]phenol, (quininib) robustly inhibits developmental angiogenesis at 4-10 μmin zebrafish and significantly inhibits angiogenic tubule formation in HMEC-1 cells, angiogenic sprouting in aortic ring explants, and retinal revascularization in oxygen-induced retinopathy mice. Quininib is well tolerated in zebrafish, human cell lines, and murine eyes. Profiling screens of 153 angiogenic and inflammatory targets revealed that quininib does not directly target VEGF receptors but antagonizes cysteinyl leukotriene receptors 1 and 2 (CysLT1-2) at micromolar IC50values. In summary, quininib is a novel anti-angiogenic small-molecule CysLT receptor antagonist. Quininib inhibits angiogenesis in a range of cell and tissue systems, revealing novel physiological roles for CysLT signaling. Quininib has potential as a novel therapeutic agent to treat ocular neovascular pathologies and may complement current anti-VEGF biological agents.
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Affiliation(s)
- Alison L Reynolds
- From the University College Dublin School of Biomolecular and Biomedical Science, Conway Institute, University College Dublin, Belfield, Dublin 4, Ireland
| | - Yolanda Alvarez
- From the University College Dublin School of Biomolecular and Biomedical Science, Conway Institute, University College Dublin, Belfield, Dublin 4, Ireland
| | - Temitope Sasore
- From the University College Dublin School of Biomolecular and Biomedical Science, Conway Institute, University College Dublin, Belfield, Dublin 4, Ireland
| | - Nora Waghorne
- From the University College Dublin School of Biomolecular and Biomedical Science, Conway Institute, University College Dublin, Belfield, Dublin 4, Ireland
| | - Clare T Butler
- From the University College Dublin School of Biomolecular and Biomedical Science, Conway Institute, University College Dublin, Belfield, Dublin 4, Ireland
| | - Claire Kilty
- From the University College Dublin School of Biomolecular and Biomedical Science, Conway Institute, University College Dublin, Belfield, Dublin 4, Ireland
| | - Andrew J Smith
- From the University College Dublin School of Biomolecular and Biomedical Science, Conway Institute, University College Dublin, Belfield, Dublin 4, Ireland
| | - Carmel McVicar
- the Centre for Experimental Medicine, Queen's University Belfast, Wellcome-Wolfson Building, 97 Lisburn Road, Belfast, BT9 7BL, United Kingdom, and
| | - Vickie H Y Wong
- the Centre for Experimental Medicine, Queen's University Belfast, Wellcome-Wolfson Building, 97 Lisburn Road, Belfast, BT9 7BL, United Kingdom, and
| | - Orla Galvin
- From the University College Dublin School of Biomolecular and Biomedical Science, Conway Institute, University College Dublin, Belfield, Dublin 4, Ireland
| | - Stephanie Merrigan
- From the University College Dublin School of Biomolecular and Biomedical Science, Conway Institute, University College Dublin, Belfield, Dublin 4, Ireland
| | - Janina Osman
- the Division of Cell and Experimental Pathology, Department of Translational Medicine, Lund University, Skåne University Hospital, 20502 Malmö, Sweden
| | - Gleb Grebnev
- From the University College Dublin School of Biomolecular and Biomedical Science, Conway Institute, University College Dublin, Belfield, Dublin 4, Ireland
| | - Anita Sjölander
- the Division of Cell and Experimental Pathology, Department of Translational Medicine, Lund University, Skåne University Hospital, 20502 Malmö, Sweden
| | - Alan W Stitt
- the Centre for Experimental Medicine, Queen's University Belfast, Wellcome-Wolfson Building, 97 Lisburn Road, Belfast, BT9 7BL, United Kingdom, and
| | - Breandán N Kennedy
- From the University College Dublin School of Biomolecular and Biomedical Science, Conway Institute, University College Dublin, Belfield, Dublin 4, Ireland,
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32
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An X, Lv H, Tian J, He X, Ling N. Role of the PTEN/PI3K/VEGF pathway in the development of Kawasaki disease. Exp Ther Med 2016; 11:1318-1322. [PMID: 27073442 PMCID: PMC4812238 DOI: 10.3892/etm.2016.3026] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2015] [Accepted: 01/27/2016] [Indexed: 01/29/2023] Open
Abstract
Kawasaki disease (KD) is a disease of unknown etiology and the leading cause of childhood acquired heart disease. In this study, the significance of the phosphatase and tensin homolog (PTEN)/phosphoinositide 3-kinase (PI3K)/vascular endothelial growth factor (VEGF) pathway in the development of KD was investigated in a rabbit model. Rabbits were divided into the control group, which received saline injection, and the experimental group, which was treated with bovine serum albumin to induce arthritis and KD. After 1, 7 and 30 days the animals were sacrificed, and the white blood cell count, serum VEGF, and serum creatine kinase (CK) levels were measured. The coronary artery was examined histologically as well as immunohistochemically for PTEN and PI3K. After the induction of arthritis, coronary artery of the rabbits showed endothelial cell swelling, osteoporosis, necrosis and inflammatory cell infiltration. PTEN expression in these rabbits increased with the increasing number of modeling days. The expression of PI3K showed a decreasing trend. The number of white blood cells in rabbits after KD modeling were significantly higher than those in the controls. One day and 7 days after modeling the serum VEGF level in KD rabbits was significantly higher than that in the control group after 1 and 7 days followed by a decrease by 30 days. There was no significant change in serum CK on the day after the modeling, and the serum CK level was significantly higher after 7 and 30 days. In conclusion, the expression of PTEN/PI3K was altered at different stages of KD. PTEN expression gradually increased with the disease progression, while the expression of PI3K gradually decreased. Serum markers indicated that the PTEN/PI3K/VEGF signaling pathway is important in the vascular injury in KD.
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Affiliation(s)
- Xinjiang An
- Department of Cardiology, Xuzhou Children's Hospital, Xuzhou, Jiangsu 221002, P.R. China
| | - Haitao Lv
- Department of Cardiology, Suzhou Children's Hospital, Suzhou, Jiangsu 215003, P.R. China
| | - Jing Tian
- Department of Cardiology, Xuzhou Children's Hospital, Xuzhou, Jiangsu 221002, P.R. China
| | - Xiuhua He
- Department of Cardiology, Xuzhou Children's Hospital, Xuzhou, Jiangsu 221002, P.R. China
| | - Nan Ling
- Department of Cardiology, Xuzhou Children's Hospital, Xuzhou, Jiangsu 221002, P.R. China
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33
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Liu L, Xie Z, Zhang W, Fang S, Kong J, Jin D, Li J, Li X, Yang X, Luo Y, Lin B, Liu T. Biomimetic tumor-induced angiogenesis and anti-angiogenic therapy in a microfluidic model. RSC Adv 2016. [DOI: 10.1039/c6ra05645h] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023] Open
Abstract
Mimickingin vivoangiogenesis on a microfluidic model and application on testing drug potential to inhibit angiogenesis.
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34
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Hypoxia-induced retinal neovascularization in zebrafish embryos: a potential model of retinopathy of prematurity. PLoS One 2015; 10:e0126750. [PMID: 25978439 PMCID: PMC4433197 DOI: 10.1371/journal.pone.0126750] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2014] [Accepted: 04/07/2015] [Indexed: 01/09/2023] Open
Abstract
Retinopathy of prematurity, formerly known as a retrolental fibroplasia, is a leading cause of infantile blindness worldwide. Retinopathy of prematurity is caused by the failure of central retinal vessels to reach the retinal periphery, creating a nonperfused peripheral retina, resulting in retinal hypoxia, neovascularization, vitreous hemorrhage, vitreoretinal fibrosis, and loss of vision. We established a potential retinopathy of prematurity model by using a green fluorescent vascular endothelium zebrafish transgenic line treated with cobalt chloride (a hypoxia-inducing agent), followed by GS4012 (a vascular endothelial growth factor inducer) at 24 hours postfertilization, and observed that the number of vascular branches and sprouts significantly increased in the central retinal vascular trunks 2-4 days after treatment. We created an angiography method by using tetramethylrhodamine dextran, which exhibited severe vascular leakage through the vessel wall into the surrounding retinal tissues. The quantification of mRNA extracted from the heads of the larvae by using real-time quantitative polymerase chain reaction revealed a twofold increase in vegfaa and vegfr2 expression compared with the control group, indicating increased vascular endothelial growth factor signaling in the hypoxic condition. In addition, we demonstrated that the hypoxic insult could be effectively rescued by several antivascular endothelial growth factor agents such as SU5416, bevacizumab, and ranibizumab. In conclusion, we provide a simple, highly reproducible, and clinically relevant retinopathy of prematurity model based on zebrafish embryos; this model may serve as a useful platform for clarifying the mechanisms of human retinopathy of prematurity and its progression.
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35
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Deans AR, Lewis SE, Huala E, Anzaldo SS, Ashburner M, Balhoff JP, Blackburn DC, Blake JA, Burleigh JG, Chanet B, Cooper LD, Courtot M, Csösz S, Cui H, Dahdul W, Das S, Dececchi TA, Dettai A, Diogo R, Druzinsky RE, Dumontier M, Franz NM, Friedrich F, Gkoutos GV, Haendel M, Harmon LJ, Hayamizu TF, He Y, Hines HM, Ibrahim N, Jackson LM, Jaiswal P, James-Zorn C, Köhler S, Lecointre G, Lapp H, Lawrence CJ, Le Novère N, Lundberg JG, Macklin J, Mast AR, Midford PE, Mikó I, Mungall CJ, Oellrich A, Osumi-Sutherland D, Parkinson H, Ramírez MJ, Richter S, Robinson PN, Ruttenberg A, Schulz KS, Segerdell E, Seltmann KC, Sharkey MJ, Smith AD, Smith B, Specht CD, Squires RB, Thacker RW, Thessen A, Fernandez-Triana J, Vihinen M, Vize PD, Vogt L, Wall CE, Walls RL, Westerfeld M, Wharton RA, Wirkner CS, Woolley JB, Yoder MJ, Zorn AM, Mabee P. Finding our way through phenotypes. PLoS Biol 2015; 13:e1002033. [PMID: 25562316 PMCID: PMC4285398 DOI: 10.1371/journal.pbio.1002033] [Citation(s) in RCA: 124] [Impact Index Per Article: 13.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023] Open
Abstract
Despite a large and multifaceted effort to understand the vast landscape of phenotypic data, their current form inhibits productive data analysis. The lack of a community-wide, consensus-based, human- and machine-interpretable language for describing phenotypes and their genomic and environmental contexts is perhaps the most pressing scientific bottleneck to integration across many key fields in biology, including genomics, systems biology, development, medicine, evolution, ecology, and systematics. Here we survey the current phenomics landscape, including data resources and handling, and the progress that has been made to accurately capture relevant data descriptions for phenotypes. We present an example of the kind of integration across domains that computable phenotypes would enable, and we call upon the broader biology community, publishers, and relevant funding agencies to support efforts to surmount today's data barriers and facilitate analytical reproducibility.
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Affiliation(s)
- Andrew R. Deans
- Department of Entomology, Pennsylvania State University, University Park, Pennsylvania, United States of America
| | - Suzanna E. Lewis
- Genome Division, Lawrence Berkeley National Lab, Berkeley, California, United States of America
| | - Eva Huala
- Department of Plant Biology, Carnegie Institution for Science, Stanford, California, United States of America
- Phoenix Bioinformatics, Palo Alto, California, United States of America
| | - Salvatore S. Anzaldo
- School of Life Sciences, Arizona State University, Tempe, Arizona, United States of America
| | - Michael Ashburner
- Department of Genetics, University of Cambridge, Cambridge, United Kingdom
| | - James P. Balhoff
- National Evolutionary Synthesis Center, Durham, North Carolina, United States of America
| | - David C. Blackburn
- Department of Vertebrate Zoology and Anthropology, California Academy of Sciences, San Francisco, California, United States of America
| | - Judith A. Blake
- The Jackson Laboratory, Bar Harbor, Maine, United States of America
| | - J. Gordon Burleigh
- Department of Biology, University of Florida, Gainesville, Florida, United States of America
| | - Bruno Chanet
- Muséum national d'Histoire naturelle, Département Systématique et Evolution, Paris, France
| | - Laurel D. Cooper
- Department of Botany and Plant Pathology, Oregon State University, Corvallis, Oregon, United States of America
| | - Mélanie Courtot
- Molecular Biology and Biochemistry Department, Simon Fraser University, Burnaby, British Columbia, Canada
| | - Sándor Csösz
- MTA-ELTE-MTM, Ecology Research Group, Pázmány Péter sétány 1C, Budapest, Hungary
| | - Hong Cui
- School of Information Resources and Library Science, University of Arizona, Tucson, Arizona, United States of America
| | - Wasila Dahdul
- Department of Biology, University of South Dakota, Vermillion, South Dakota, United States of America
| | - Sandip Das
- Department of Botany, University of Delhi, Delhi, India
| | - T. Alexander Dececchi
- Department of Biology, University of South Dakota, Vermillion, South Dakota, United States of America
| | - Agnes Dettai
- Muséum national d'Histoire naturelle, Département Systématique et Evolution, Paris, France
| | - Rui Diogo
- Department of Anatomy, Howard University College of Medicine, Washington D.C., United States of America
| | - Robert E. Druzinsky
- Department of Oral Biology, College of Dentistry, University of Illinois, Chicago, Illinois, United States of America
| | - Michel Dumontier
- Stanford Center for Biomedical Informatics Research, Stanford, California, United States of America
| | - Nico M. Franz
- School of Life Sciences, Arizona State University, Tempe, Arizona, United States of America
| | - Frank Friedrich
- Biocenter Grindel and Zoological Museum, Hamburg University, Hamburg, Germany
| | - George V. Gkoutos
- Department of Computer Science, Aberystwyth University, Aberystwyth, Ceredigion, United Kingdom
| | - Melissa Haendel
- Department of Medical Informatics & Epidemiology, Oregon Health & Science University, Portland, Oregon, United States of America
| | - Luke J. Harmon
- Department of Biological Sciences, University of Idaho, Moscow, Idaho, United States of America
| | - Terry F. Hayamizu
- Mouse Genome Informatics, The Jackson Laboratory, Bar Harbor, Maine, United States of America
| | - Yongqun He
- Unit for Laboratory Animal Medicine, Department of Microbiology and Immunology, Center for Computational Medicine and Bioinformatics, and Comprehensive Cancer Center, University of Michigan Medical School, Ann Arbor, Michigan, United States of America
| | - Heather M. Hines
- Department of Entomology, Pennsylvania State University, University Park, Pennsylvania, United States of America
| | - Nizar Ibrahim
- Department of Organismal Biology and Anatomy, University of Chicago, Chicago, Illinois, United States of America
| | - Laura M. Jackson
- Department of Biology, University of South Dakota, Vermillion, South Dakota, United States of America
| | - Pankaj Jaiswal
- Department of Botany and Plant Pathology, Oregon State University, Corvallis, Oregon, United States of America
| | - Christina James-Zorn
- Cincinnati Children's Hospital, Division of Developmental Biology, Cincinnati, Ohio, United States of America
| | - Sebastian Köhler
- Institute for Medical Genetics and Human Genetics, Charité-Universitätsmedizin Berlin, Berlin, Germany
| | - Guillaume Lecointre
- Muséum national d'Histoire naturelle, Département Systématique et Evolution, Paris, France
| | - Hilmar Lapp
- National Evolutionary Synthesis Center, Durham, North Carolina, United States of America
| | - Carolyn J. Lawrence
- Department of Genetics, Development and Cell Biology and Department of Agronomy, Iowa State University, Ames, Iowa, United States of America
| | | | - John G. Lundberg
- Department of Ichthyology, The Academy of Natural Sciences, Philadelphia, Pennsylvania, United States of America
| | - James Macklin
- Eastern Cereal and Oilseed Research Centre, Ottawa, Ontario, Canada
| | - Austin R. Mast
- Department of Biological Science, Florida State University, Tallahassee, Florida, United States of America
| | | | - István Mikó
- Department of Entomology, Pennsylvania State University, University Park, Pennsylvania, United States of America
| | - Christopher J. Mungall
- Genome Division, Lawrence Berkeley National Lab, Berkeley, California, United States of America
| | - Anika Oellrich
- European Molecular Biology Laboratory - European Bioinformatics Institute, Wellcome Trust Genome Campus, Hinxton, United Kingdom
| | - David Osumi-Sutherland
- European Molecular Biology Laboratory - European Bioinformatics Institute, Wellcome Trust Genome Campus, Hinxton, United Kingdom
| | - Helen Parkinson
- European Molecular Biology Laboratory - European Bioinformatics Institute, Wellcome Trust Genome Campus, Hinxton, United Kingdom
| | - Martín J. Ramírez
- Division of Arachnology, Museo Argentino de Ciencias Naturales - CONICET, Buenos Aires, Argentina
| | - Stefan Richter
- Allgemeine & Spezielle Zoologie, Institut für Biowissenschaften, Universität Rostock, Universitätsplatz 2, Rostock, Germany
| | - Peter N. Robinson
- Institut für Medizinische Genetik und Humangenetik Charité – Universitätsmedizin Berlin, Berlin, Germany
| | - Alan Ruttenberg
- School of Dental Medicine, University at Buffalo, Buffalo, New York, United States of America
| | - Katja S. Schulz
- Smithsonian Institution, National Museum of Natural History, Washington, D.C., United States of America
| | - Erik Segerdell
- Knight Cancer Institute, Oregon Health & Science University, Portland, Oregon, United States of America
| | - Katja C. Seltmann
- Division of Invertebrate Zoology, American Museum of Natural History, New York, New York, United States of America
| | - Michael J. Sharkey
- Department of Entomology, University of Kentucky, Lexington, Kentucky, United States of America
| | - Aaron D. Smith
- Department of Biological Sciences, Northern Arizona University, Flagstaff, Arizona, United States of America
| | - Barry Smith
- Department of Philosophy, University at Buffalo, Buffalo, New York, United States of America
| | - Chelsea D. Specht
- Department of Plant and Microbial Biology, Integrative Biology, and the University and Jepson Herbaria, University of California, Berkeley, California, United States of America
| | - R. Burke Squires
- Bioinformatics and Computational Biosciences Branch, Office of Cyber Infrastructure and Computational Biology, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, Maryland, United States of America
| | - Robert W. Thacker
- Department of Biology, University of Alabama at Birmingham, Birmingham, Alabama, United States of America
| | - Anne Thessen
- The Data Detektiv, 1412 Stearns Hill Road, Waltham, Massachusetts, United States of America
| | | | - Mauno Vihinen
- Department of Experimental Medical Science, Lund University, Lund, Sweden
| | - Peter D. Vize
- Department of Biological Sciences, University of Calgary, Calgary, Alberta, Canada
| | - Lars Vogt
- Universität Bonn, Institut für Evolutionsbiologie und Ökologie, Bonn, Germany
| | - Christine E. Wall
- Department of Evolutionary Anthropology, Duke University, Durham, North Carolina, United States of America
| | - Ramona L. Walls
- iPlant Collaborative University of Arizona, Thomas J. Keating Bioresearch Building, Tucson, Arizona, United States of America
| | - Monte Westerfeld
- Institute of Neuroscience, University of Oregon, Eugene, Oregon, United States of America
| | - Robert A. Wharton
- Department of Entomology, Texas A & M University, College, Station, Texas, United States of America
| | - Christian S. Wirkner
- Allgemeine & Spezielle Zoologie, Institut für Biowissenschaften, Universität Rostock, Universitätsplatz 2, Rostock, Germany
| | - James B. Woolley
- Department of Entomology, Texas A & M University, College, Station, Texas, United States of America
| | - Matthew J. Yoder
- Illinois Natural History Survey, University of Illinois, Champaign, Illinois, United States of America
| | - Aaron M. Zorn
- Cincinnati Children's Hospital, Division of Developmental Biology, Cincinnati, Ohio, United States of America
| | - Paula Mabee
- Department of Biology, University of South Dakota, Vermillion, South Dakota, United States of America
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Rennekamp AJ, Peterson RT. 15 years of zebrafish chemical screening. Curr Opin Chem Biol 2014; 24:58-70. [PMID: 25461724 DOI: 10.1016/j.cbpa.2014.10.025] [Citation(s) in RCA: 192] [Impact Index Per Article: 19.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2014] [Revised: 10/28/2014] [Accepted: 10/30/2014] [Indexed: 12/13/2022]
Abstract
In 2000, the first chemical screen using living zebrafish in a multi-well plate was reported. Since then, more than 60 additional screens have been published describing whole-organism drug and pathway discovery projects in zebrafish. To investigate the scope of the work reported in the last 14 years and to identify trends in the field, we analyzed the discovery strategies of 64 primary research articles from the literature. We found that zebrafish screens have expanded beyond the use of developmental phenotypes to include behavioral, cardiac, metabolic, proliferative and regenerative endpoints. Additionally, many creative strategies have been used to uncover the mechanisms of action of new small molecules including chemical phenocopy, genetic phenocopy, mutant rescue, and spatial localization strategies.
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Affiliation(s)
- Andrew J Rennekamp
- Cardiovascular Research Center and Division of Cardiology, Department of Medicine, Massachusetts General Hospital, Harvard Medical School, 149 13th Street, Charlestown, MA 02129, USA; Department of Systems Biology, Harvard Medical School, 200 Longwood Avenue, Boston, MA 02115, USA; Broad Institute, 7 Cambridge Center, Cambridge, MA 02142, USA
| | - Randall T Peterson
- Cardiovascular Research Center and Division of Cardiology, Department of Medicine, Massachusetts General Hospital, Harvard Medical School, 149 13th Street, Charlestown, MA 02129, USA; Department of Systems Biology, Harvard Medical School, 200 Longwood Avenue, Boston, MA 02115, USA; Broad Institute, 7 Cambridge Center, Cambridge, MA 02142, USA.
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Sasore T, Kennedy B. Deciphering combinations of PI3K/AKT/mTOR pathway drugs augmenting anti-angiogenic efficacy in vivo. PLoS One 2014; 9:e105280. [PMID: 25144531 PMCID: PMC4140730 DOI: 10.1371/journal.pone.0105280] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2014] [Accepted: 07/23/2014] [Indexed: 12/27/2022] Open
Abstract
Ocular neovascularization is a common pathology associated with human eye diseases e.g. age-related macular degeneration and proliferative diabetic retinopathy. Blindness represents one of the most feared disabilities and remains a major burden to health-care systems. Current approaches to treat ocular neovascularisation include laser photocoagulation, photodynamic therapy and anti-VEGF therapies: Ranibizumab (Lucentis) and Aflibercept (Eylea). However, high clinical costs, frequent intraocular injections, and increased risk of infections are challenges related with these standards of care. Thus, there is a clinical need to develop more effective drugs that overcome these challenges. Here, we focus on an alternative approach by quantifying the in vivo anti-angiogenic efficacy of combinations of phosphatidylinositol-3-kinase (PI3K) pathway inhibitors. The PI3K/AKT/mTOR pathway is a complex signalling pathway involved in crucial cellular functions such as cell proliferation, migration and angiogenesis. RT-PCR confirms the expression of PI3K target genes (pik3ca, pik3r1, mtor and akt1) in zebrafish trunks from 6 hours post fertilisation (hpf) and in eyes from 2 days post fertilisation (dpf). Using both the zebrafish intersegmental vessel and hyaloid vessel assays to measure the in vivo anti-angiogenic efficacy of PI3K/Akt/mTOR pathway inhibitors, we identified 5 µM combinations of i) NVP-BEZ235 (dual PI3K-mTOR inhibitor) + PI-103 (dual PI3K-mTOR inhibitor); or ii) LY-294002 (pan-PI3K inhibitor) + NVP-BEZ235; or iii) NVP-BEZ235 + rapamycin (mTOR inhibitor); or iv) LY-294002 + rapamycin as the most anti-angiogenic. Treatment of developing larvae from 2–5 dpf with 5 µM NVP-BEZ235 plus PI-103 resulted in an essentially intact ocular morphology and visual behaviour, whereas other combinations severely disrupted the developing retinal morphology and visual function. In human ARPE19 retinal pigment epithelium cells, however, no significant difference in cell number was observed following treatment with the inhibitor combinations. Collectively, these results highlight the potential of combinations of PI3K/AKT/mTOR pathway inhibitors to safely and effectively treat ocular neovascularization.
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Affiliation(s)
- Temitope Sasore
- UCD School of Biomolecular and Biomedical Science, UCD Conway Institute, University College Dublin, Dublin, Ireland
| | - Breandán Kennedy
- UCD School of Biomolecular and Biomedical Science, UCD Conway Institute, University College Dublin, Dublin, Ireland
- * E-mail:
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Targeting the PI3K/Akt/mTOR Pathway in Ocular Neovascularization. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2014; 801:805-11. [DOI: 10.1007/978-1-4614-3209-8_101] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/06/2022]
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Rezzola S, Belleri M, Gariano G, Ribatti D, Costagliola C, Semeraro F, Presta M. In vitro and ex vivo retina angiogenesis assays. Angiogenesis 2013; 17:429-42. [DOI: 10.1007/s10456-013-9398-x] [Citation(s) in RCA: 48] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2013] [Accepted: 10/03/2013] [Indexed: 12/16/2022]
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Gore AV, Monzo K, Cha YR, Pan W, Weinstein BM. Vascular development in the zebrafish. Cold Spring Harb Perspect Med 2013; 2:a006684. [PMID: 22553495 DOI: 10.1101/cshperspect.a006684] [Citation(s) in RCA: 167] [Impact Index Per Article: 15.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
The zebrafish has emerged as an excellent vertebrate model system for studying blood and lymphatic vascular development. The small size, external and rapid development, and optical transparency of zebrafish embryos are some of the advantages the zebrafish model system offers. Multiple well-established techniques have been developed for imaging and functionally manipulating vascular tissues in zebrafish embryos, expanding on and amplifying these basic advantages and accelerating use of this model system for studying vascular development. In the past decade, studies performed using zebrafish as a model system have provided many novel insights into vascular development. In this article we discuss the amenability of this model system for studying blood vessel development and review contributions made by this system to our understanding of vascular development.
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Affiliation(s)
- Aniket V Gore
- Program in Genomics of Differentiation, Laboratory of Molecular Genetics, Section on Vertebrate Organogenesis, NICHD, NIH, Bethesda, Maryland, USA
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Abstract
PI3Ks are signaling enzymes engaged by different types of membrane receptors and activated in cardiovascular diseases such as hypertension, atherosclerosis, thrombosis and heart failure. Studies performed on genetically modified animals have provided proof-of-concept that general or isoform-specific blockade of these enzymes can modify disease development and progression. Hence, therapeutic inhibition of PI3Ks with novel pharmacological compounds constitutes a promising area of drug development. In particular, inhibitors of PI3Ks have the potential to reduce blood pressure, restrain the development of atherosclerosis and/or stabilize atherosclerotic plaques, blunt platelet aggregation, prevent left ventricular remodeling and preserve myocardial contractility in heart failure. This review summarizes the rationale of PI3K inhibition in the most prevalent cardiovascular diseases, and the available data on the therapeutic effects of PI3K inhibitors in their preclinical models. Implications for future drug development and human therapy are also discussed.
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Novodvorsky P, Da Costa MMJ, Chico TJA. Zebrafish-based small molecule screens for novel cardiovascular drugs. DRUG DISCOVERY TODAY. TECHNOLOGIES 2013; 10:e109-e114. [PMID: 24050238 DOI: 10.1016/j.ddtec.2012.01.005] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
The zebrafish is increasingly being adopted as an in vivo model of high throughput drug screening. In this brief review we outline the advantages and disadvantages of this approach and summarize recent screens that have attempted to identify novel small molecules with activity on the cardiovascular system.
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Yin J, Shine L, Raycroft F, Deeti S, Reynolds A, Ackerman KM, Glaviano A, O'Farrell S, O'Leary O, Kilty C, Kennedy C, McLoughlin S, Rice M, Russell E, Higgins DG, Hyde DR, Kennedy BN. Inhibition of the Pim1 oncogene results in diminished visual function. PLoS One 2012; 7:e52177. [PMID: 23300608 PMCID: PMC3530609 DOI: 10.1371/journal.pone.0052177] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2012] [Accepted: 11/14/2012] [Indexed: 12/17/2022] Open
Abstract
Our objective was to profile genetic pathways whose differential expression correlates with maturation of visual function in zebrafish. Bioinformatic analysis of transcriptomic data revealed Jak-Stat signalling as the pathway most enriched in the eye, as visual function develops. Real-time PCR, western blotting, immunohistochemistry and in situ hybridization data confirm that multiple Jak-Stat pathway genes are up-regulated in the zebrafish eye between 3–5 days post-fertilisation, times associated with significant maturation of vision. One of the most up-regulated Jak-Stat genes is the proto-oncogene Pim1 kinase, previously associated with haematological malignancies and cancer. Loss of function experiments using Pim1 morpholinos or Pim1 inhibitors result in significant diminishment of visual behaviour and function. In summary, we have identified that enhanced expression of Jak-Stat pathway genes correlates with maturation of visual function and that the Pim1 oncogene is required for normal visual function.
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Affiliation(s)
- Jun Yin
- UCD School of Medicine and Medical Science, UCD Conway Institute, University College Dublin, Dublin, Ireland
| | - Lisa Shine
- UCD School of Biomolecular and Biomedical Science, UCD Conway Institute, University College Dublin, Dublin, Ireland
| | - Francis Raycroft
- Department of Biological Sciences and the Center for Zebrafish Research, University of Notre Dame, Notre Dame, Indiana, United States of America
| | - Sudhakar Deeti
- UCD School of Biomolecular and Biomedical Science, UCD Conway Institute, University College Dublin, Dublin, Ireland
| | - Alison Reynolds
- UCD School of Biomolecular and Biomedical Science, UCD Conway Institute, University College Dublin, Dublin, Ireland
| | - Kristin M. Ackerman
- Department of Biological Sciences and the Center for Zebrafish Research, University of Notre Dame, Notre Dame, Indiana, United States of America
| | - Antonino Glaviano
- UCD School of Biomolecular and Biomedical Science, UCD Conway Institute, University College Dublin, Dublin, Ireland
| | - Sean O'Farrell
- UCD School of Biomolecular and Biomedical Science, UCD Conway Institute, University College Dublin, Dublin, Ireland
| | - Olivia O'Leary
- UCD School of Biomolecular and Biomedical Science, UCD Conway Institute, University College Dublin, Dublin, Ireland
| | - Claire Kilty
- UCD School of Biomolecular and Biomedical Science, UCD Conway Institute, University College Dublin, Dublin, Ireland
| | - Ciaran Kennedy
- UCD School of Biomolecular and Biomedical Science, UCD Conway Institute, University College Dublin, Dublin, Ireland
| | - Sarah McLoughlin
- UCD School of Biomolecular and Biomedical Science, UCD Conway Institute, University College Dublin, Dublin, Ireland
| | - Megan Rice
- UCD School of Biomolecular and Biomedical Science, UCD Conway Institute, University College Dublin, Dublin, Ireland
| | - Eileen Russell
- UCD School of Biomolecular and Biomedical Science, UCD Conway Institute, University College Dublin, Dublin, Ireland
| | - Desmond G. Higgins
- UCD School of Medicine and Medical Science, UCD Conway Institute, University College Dublin, Dublin, Ireland
| | - David R. Hyde
- Department of Biological Sciences and the Center for Zebrafish Research, University of Notre Dame, Notre Dame, Indiana, United States of America
| | - Breandan N. Kennedy
- UCD School of Biomolecular and Biomedical Science, UCD Conway Institute, University College Dublin, Dublin, Ireland
- * E-mail:
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Meng D, Mei A, Liu J, Kang X, Shi X, Qian R, Chen S. NADPH oxidase 4 mediates insulin-stimulated HIF-1α and VEGF expression, and angiogenesis in vitro. PLoS One 2012; 7:e48393. [PMID: 23144758 PMCID: PMC3483150 DOI: 10.1371/journal.pone.0048393] [Citation(s) in RCA: 60] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2012] [Accepted: 09/25/2012] [Indexed: 11/24/2022] Open
Abstract
Acute intensive insulin therapy causes a transient worsening of diabetic retinopathy in type 1 diabetes patients and is related to VEGF expression. Reactive oxygen species (ROS) have been shown to be involved in HIF-1α and VEGF expression induced by insulin, but the role of specific ROS sources has not been fully elucidated. In this study we examined the role of NADPH oxidase subunit 4 (Nox4) in insulin-stimulated HIF-1α and VEGF expression, and angiogenic responses in human microvascular endothelial cells (HMVECs). Here we demonstrate that knockdown of Nox4 by siRNA reduced insulin-stimulated ROS generation, the tyrosine phosphorylation of IR-β and IRS-1, but did not change the serine phosphorylation of IRS-1. Nox4 gene silencing had a much greater inhibitory effect on insulin-induced AKT activation than ERK1/2 activation, whereas it had little effect on the expression of the phosphatases such as MKP-1 and SHIP. Inhibition of Nox4 expression inhibited the transcriptional activity of VEGF through HIF-1. Overexpression of wild-type Nox4 was sufficient to increase VEGF transcriptional activity, and further enhanced insulin-stimulated the activation of VEGF. Downregulation of Nox4 expression decreased insulin-stimulated mRNA and protein expression of HIF-1α, but did not change the rate of HIF-1α degradation. Inhibition of Nox4 impaired insulin-stimulated VEGF expression, cell migration, cell proliferation, and tube formation in HMVECs. Our data indicate that Nox4-derived ROS are essential for HIF-1α-dependent VEGF expression, and angiogenesis in vitro induced by insulin. Nox4 may be an attractive therapeutic target for diabetic retinopathy caused by intensive insulin treatment.
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Affiliation(s)
- Dan Meng
- Department of Physiology and Pathophysiology, Fudan University Shanghai Medical College, Shanghai, China.
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Yadav UCS, Srivastava SK, Ramana KV. Prevention of VEGF-induced growth and tube formation in human retinal endothelial cells by aldose reductase inhibition. J Diabetes Complications 2012; 26:369-77. [PMID: 22658411 PMCID: PMC3434238 DOI: 10.1016/j.jdiacomp.2012.04.017] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/30/2011] [Revised: 04/17/2012] [Accepted: 04/30/2012] [Indexed: 10/28/2022]
Abstract
OBJECTIVE Since diabetes-induced vascular endothelial growth factor (VEGF) is implicated in retinal angiogenesis, we aimed to examine the role of aldose reductase (AR) in VEGF-induced human retinal endothelial cells (HREC) growth and tube formation. MATERIALS AND METHODS HRECs were stimulated with VEGF and cell-growth was determined by MTT assay. AR inhibitor, fidarestat, to block the enzyme activity and AR siRNA to ablate AR gene expression in HREC were used to investigate the role of AR in neovascularization using cell-migration and tube formation assays. Various signaling intermediates and angiogenesis markers were assessed by Western blot analysis. Immuno-histochemical analysis of diabetic rat eyes was performed to examine VEGF expression in the retinal layer. RESULTS Stimulation of primary HREC with VEGF caused increased cell growth and migration, and AR inhibition with fidarestat or ablation with siRNA significantly prevented it. VEGF-induced tube formation in HREC was also significantly prevented by fidarestat. Treatment of HREC with VEGF also increased the expression of VCAM, AR, and phosphorylation and activation of Akt and p38-MAP kinase, which were prevented by fidarestat. VEGF-induced expression of VEGFRII in HREC was also prevented by AR inhibition or ablation. CONCLUSIONS Our results indicate that inhibition of AR in HREC prevents tube formation by inhibiting the VEGF-induced activation of the Akt and p38-MAPK pathway and suggest a mediatory role of AR in ocular neovascularization generally implicated in retinopathy and AMD.
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Affiliation(s)
| | | | - KV Ramana
- Corresponding Author: Kota V Ramana, PhD., Dept. of Biochemistry & Molecular Biology, University of Texas Medical Branch, 6.614D Basic Science Building, 301 University Blvd., Galveston, TX 77555-0647, Tel: 409-772-2202,
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46
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Rai V, Maldonado AY, Burz DS, Reverdatto S, Yan SF, Schmidt AM, Shekhtman A. Signal transduction in receptor for advanced glycation end products (RAGE): solution structure of C-terminal rage (ctRAGE) and its binding to mDia1. J Biol Chem 2011; 287:5133-44. [PMID: 22194616 DOI: 10.1074/jbc.m111.277731] [Citation(s) in RCA: 92] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023] Open
Abstract
The receptor for advanced glycation end products (RAGE) is a multiligand cell surface macromolecule that plays a central role in the etiology of diabetes complications, inflammation, and neurodegeneration. The cytoplasmic domain of RAGE (C-terminal RAGE; ctRAGE) is critical for RAGE-dependent signal transduction. As the most membrane-proximal event, mDia1 binds to ctRAGE, and it is essential for RAGE ligand-stimulated phosphorylation of AKT and cell proliferation/migration. We show that ctRAGE contains an unusual α-turn that mediates the mDia1-ctRAGE interaction and is required for RAGE-dependent signaling. The results establish a novel mechanism through which an extracellular signal initiated by RAGE ligands regulates RAGE signaling in a manner requiring mDia1.
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Affiliation(s)
- Vivek Rai
- New York University Medical Center, New York, New York 10016, USA
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47
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Jensen LD, Rouhi P, Cao Z, Länne T, Wahlberg E, Cao Y. Zebrafish models to study hypoxia-induced pathological angiogenesis in malignant and nonmalignant diseases. ACTA ACUST UNITED AC 2011; 93:182-93. [PMID: 21671357 DOI: 10.1002/bdrc.20203] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Most in vivo preclinical disease models are based on mouse and other mammalian systems. However, these rodent-based model systems have considerable limitations to recapitulate clinical situations in human patients. Zebrafish have been widely used to study embryonic development, behavior, tissue regeneration, and genetic defects. Additionally, zebrafish also provides an opportunity to screen chemical compounds that target a specific cell population for drug development. Owing to the availability of various genetically manipulated strains of zebrafish, immune privilege during early embryonic development, transparency of the embryos, and easy and precise setup of hypoxia equipment, we have developed several disease models in both embryonic and adult zebrafish, focusing on studying the role of angiogenesis in pathological settings. These zebrafish disease models are complementary to the existing mouse models, allowing us to study clinically relevant processes in cancer and nonmalignant diseases, which otherwise would be difficult to study in mice. For example, dissemination and invasion of single human or mouse tumor cells from the primary site in association with tumor angiogenesis can be studied under normoxia or hypoxia in zebrafish embryos. Hypoxia-induced retinopathy in the adult zebrafish recapitulates the clinical situation of retinopathy development in diabetic patients or age-related macular degeneration. These zebrafish disease models offer exciting opportunities to understand the mechanisms of disease development, progression, and development of more effective drugs for therapeutic intervention.
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Affiliation(s)
- Lasse Dahl Jensen
- Deparment of Microbiology, Tumor and Cell biology, Karolinska Institutet, Stockholm, Sweden.
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Seaman ME, Peirce SM, Kelly K. Rapid analysis of vessel elements (RAVE): a tool for studying physiologic, pathologic and tumor angiogenesis. PLoS One 2011; 6:e20807. [PMID: 21694777 PMCID: PMC3111429 DOI: 10.1371/journal.pone.0020807] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2011] [Accepted: 05/10/2011] [Indexed: 11/26/2022] Open
Abstract
Quantification of microvascular network structure is important in a myriad of emerging research fields including microvessel remodeling in response to ischemia and drug therapy, tumor angiogenesis, and retinopathy. To mitigate analyst-specific variation in measurements and to ensure that measurements represent actual changes in vessel network structure and morphology, a reliable and automatic tool for quantifying microvascular network architecture is needed. Moreover, an analysis tool capable of acquiring and processing large data sets will facilitate advanced computational analysis and simulation of microvascular growth and remodeling processes and enable more high throughput discovery. To this end, we have produced an automatic and rapid vessel detection and quantification system using a MATLAB graphical user interface (GUI) that vastly reduces time spent on analysis and greatly increases repeatability. Analysis yields numerical measures of vessel volume fraction, vessel length density, fractal dimension (a measure of tortuosity), and radii of murine vascular networks. Because our GUI is open sourced to all, it can be easily modified to measure parameters such as percent coverage of non-endothelial cells, number of loops in a vascular bed, amount of perfusion and two-dimensional branch angle. Importantly, the GUI is compatible with standard fluorescent staining and imaging protocols, but also has utility analyzing brightfield vascular images, obtained, for example, in dorsal skinfold chambers. A manually measured image can be typically completed in 20 minutes to 1 hour. In stark comparison, using our GUI, image analysis time is reduced to around 1 minute. This drastic reduction in analysis time coupled with increased repeatability makes this tool valuable for all vessel research especially those requiring rapid and reproducible results, such as anti-angiogenic drug screening.
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Affiliation(s)
- Marc E. Seaman
- Department of Biomedical Engineering, University of Virginia, Charlottesville, Virginia, United States of America
- Robert M. Berne Cardiovascular Research Center, University of Virginia, Charlottesville, Virginia, United States of America
| | - Shayn M. Peirce
- Department of Biomedical Engineering, University of Virginia, Charlottesville, Virginia, United States of America
- Robert M. Berne Cardiovascular Research Center, University of Virginia, Charlottesville, Virginia, United States of America
| | - Kimberly Kelly
- Department of Biomedical Engineering, University of Virginia, Charlottesville, Virginia, United States of America
- Robert M. Berne Cardiovascular Research Center, University of Virginia, Charlottesville, Virginia, United States of America
- * E-mail:
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Wang H, Su Y. Collagen IV contributes to nitric oxide-induced angiogenesis of lung endothelial cells. Am J Physiol Cell Physiol 2011; 300:C979-88. [PMID: 21307347 DOI: 10.1152/ajpcell.00368.2010] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Abstract
Nitric oxide (NO) mediates endothelial angiogenesis via inducing the expression of integrin α(v)β(3). During angiogenesis, endothelial cells adhere to and migrate into the extracellular matrix through integrins. Collagen IV binds to integrin α(v)β(3), leading to integrin activation, which affects a number of signaling processes in endothelial cells. In the present study, we evaluated the role of collagen IV in NO-induced angiogenesis. We found that NO donor 2,2'-(hydroxynitrosohydrazino)bis-ethanamine (NOC-18) causes increases in collagen IV mRNA and protein in lung endothelial cells and collagen IV release into the medium. Addition of collagen IV into the coating of endothelial culture increases endothelial monolayer wound repair, proliferation, and tube formation. Inhibition of collagen IV synthesis using gene silencing attenuates NOC-18-induced increases in monolayer wound repair, cell proliferation, and tube formation as well as in the phosphorylation of focal adhesion kinase (FAK). Integrin blocking antibody LM609 prevents NOC-18-induced increase in endothelial monolayer wound repair. Inhibition of protein kinase G (PKG) using the specific PKG inhibitor KT5823 or PKG small interfering RNA prevents NOC-18-induced increases in collagen IV protein and mRNA and endothelial angiogenesis. Together, these results indicate that NO promotes collagen IV synthesis via a PKG signaling pathway and that the increase in collagen IV synthesis contributes to NO-induced angiogenesis of lung endothelial cells through integrin-FAK signaling. Manipulation of collagen IV could be a novel approach for the prevention and treatment of diseases such as alveolar capillary dysplasia, severe pulmonary arterial hypertension, and tumor invasion.
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Affiliation(s)
- Huafang Wang
- Dept. of Pharmacology and Toxicology, Medical College of Georgia, Georgia Health Sciences University, 1120 15th St., Augusta, GA 30912, USA
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Gay CM, Zygmunt T, Torres-Vázquez J. Diverse functions for the semaphorin receptor PlexinD1 in development and disease. Dev Biol 2011; 349:1-19. [PMID: 20880496 PMCID: PMC2993764 DOI: 10.1016/j.ydbio.2010.09.008] [Citation(s) in RCA: 58] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2010] [Revised: 09/14/2010] [Accepted: 09/18/2010] [Indexed: 01/13/2023]
Abstract
Plexins are a family of single-pass transmembrane proteins that serve as cell surface receptors for Semaphorins during the embryonic development of animals. Semaphorin-Plexin signaling is critical for many cellular aspects of organogenesis, including cell migration, proliferation and survival. Until recently, little was known about the function of PlexinD1, the sole member of the vertebrate-specific PlexinD (PlxnD1) subfamily. Here we review novel findings about PlxnD1's roles in the development of the cardiovascular, nervous and immune systems and salivary gland branching morphogenesis and discuss new insights concerning the molecular mechanisms of PlxnD1 activity.
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Affiliation(s)
- Carl M Gay
- Helen L. and Martin S. Kimmel Center for Biology and Medicine, Skirball Institute of Biomolecular Medicine, New York University Langone Medical Center, 540 First Avenue, 4th floor, lab 14, New York, NY 10016, USA
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