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Tumlinson AR, Calara JM, Azar DT, Adamis AP, Vavvas DG, Stewart JM. Feasibility demonstration of a device for vitreous liquid biopsy incidental to intravitreal injection. PLoS One 2024; 19:e0294526. [PMID: 38241211 PMCID: PMC10798501 DOI: 10.1371/journal.pone.0294526] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2023] [Accepted: 11/01/2023] [Indexed: 01/21/2024] Open
Abstract
PURPOSE VitreoDx is an experimental device enabling push-button collection of a neat vitreous liquid biopsy incidental to an intravitreal injection. We explored the ability of the device to collect a sample usable for proteomic biomarker discovery and testing. DESIGN Pilot study using ex vivo human eyes. METHODS Non-vitrectomized, human eyes from nine donors 75-91 years of age were refrigerated in BSS and used within 5 days of death. Four VitreoDx devices fitted with 25G needles, and four staked needle insulin syringes with 30G needles, were inserted at equal intervals through the pars plana of each eye and held in place by a fixture. The sampling mode of each VitreoDx device was triggered to attempt to acquire a liquid biopsy up to 70 μL. The plunger of each insulin syringe was retracted to attempt to obtain a liquid biopsy with a maximum volume of 50 μL. Samples acquired with the VitreoDx were extracted to polypropylene cryovials, refrigerated to -80 ºC, and sent for offsite proteomic analysis by proximity extension assay with a focus on panels containing approved and pipelined drug targets for neovascular disease and inflammatory factors. RESULTS Of the attempted liquid biopsies with the novel 25G VitreoDx, 92% (66 of 72) resulted in successful acquisition (>25 μL) while 89% (64 of 72) attempted by a traditional 30G needle resulted in a successful acquisition. Sample volume sufficient for proteomics array analysis was acquired by the VitreoDx for every eye. Detectable protein was found for 151 of 166 unique proteins assayed in at least 25% of eyes sampled by VitreoDx. CONCLUSIONS The high acquisition rate achieved by the prototype was similar to that achieved in previous clinical studies where a standard syringe was used with a 25G needle to biopsy vitreous fluid directly prior to standard intravitreal injection. Successful aspiration rates were likewise high for 30G needles. Together, these suggest that it is possible to routinely acquire liquid vitreous biopsies from patients who typically receive intravitreal injections with an injection device using a standard size needle without a vitreous cutter. Protein analysis shows that proteins of interest survive the sampling mechanism and may have potential to direct care in the future.
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Affiliation(s)
- Alexandre R. Tumlinson
- Twenty / Twenty Therapeutics LLC, South San Francisco, California, United States of America
| | - Jennifer M. Calara
- Twenty / Twenty Therapeutics LLC, South San Francisco, California, United States of America
| | - Dimitri T. Azar
- Twenty / Twenty Therapeutics LLC, South San Francisco, California, United States of America
| | - Anthony P. Adamis
- Twenty / Twenty Therapeutics LLC, South San Francisco, California, United States of America
- Department of Ophthalmology, Mass Eye and Ear, Harvard Medical School, Boston, Massachusetts, United States of America
| | - Demetrios G. Vavvas
- Department of Ophthalmology, Mass Eye and Ear, Harvard Medical School, Boston, Massachusetts, United States of America
| | - Jay M. Stewart
- Department of Ophthalmology, University of California, San Francisco, San Francisco, California, United States of America
- Department of Ophthalmology, Zuckerberg San Francisco General Hospital and Trauma Center, San Francisco, California, United States of America
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Gomes JAP, Azar DT, Baudouin C, Bitton E, Chen W, Hafezi F, Hamrah P, Hogg RE, Horwath-Winter J, Kontadakis GA, Mehta JS, Messmer EM, Perez VL, Zadok D, Willcox MDP. TFOS Lifestyle: Impact of elective medications and procedures on the ocular surface. Ocul Surf 2023; 29:331-385. [PMID: 37087043 DOI: 10.1016/j.jtos.2023.04.011] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2023] [Accepted: 04/10/2023] [Indexed: 04/24/2023]
Abstract
The word "elective" refers to medications and procedures undertaken by choice or with a lower grade of prioritization. Patients usually use elective medications or undergo elective procedures to treat pathologic conditions or for cosmetic enhancement, impacting their lifestyle positively and, thus, improving their quality of life. However, those interventions can affect the homeostasis of the tear film and ocular surface. Consequently, they generate signs and symptoms that could impair the patient's quality of life. This report describes the impact of elective topical and systemic medications and procedures on the ocular surface and the underlying mechanisms. Moreover, elective procedures performed for ocular diseases, cosmetic enhancement, and non-ophthalmic interventions, such as radiotherapy and bariatric surgery, are discussed. The report also evaluates significant anatomical and biological consequences of non-urgent interventions to the ocular surface, such as neuropathic and neurotrophic keratopathies. Besides that, it provides an overview of the prophylaxis and management of pathological conditions resulting from the studied interventions and suggests areas for future research. The report also contains a systematic review investigating the quality of life among people who have undergone small incision lenticule extraction (SMILE). Overall, SMILE refractive surgery seems to cause more vision disturbances than LASIK in the first month post-surgery, but less dry eye symptoms in long-term follow up.
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Affiliation(s)
- José Alvaro P Gomes
- Dept. of Ophthalmology and Visual Sciences, Federal University of Sao Paulo/Paulista School of Medicine (UNIFESP/EPM), Sao Paulo, SP, Brazil.
| | - Dimitri T Azar
- University of Illinois College of Medicine, Chicago, IL, USA
| | - Christophe Baudouin
- Quinze-Vingts National Eye Hospital & Vision Institute, IHU FOReSIGHT, Paris, France
| | - Etty Bitton
- Ecole d'optométrie, Université de Montréal, Montréal, Canada
| | - Wei Chen
- Eye Hospital of Wenzhou Medical University, Wenzhou, Zhejiang, China
| | | | - Pedram Hamrah
- Department of Ophthalmology, Tufts Medical Center, Tufts University School of Medicine, Boston, MA, USA
| | - Ruth E Hogg
- Centre for Public Health, School of Medicine, Dentistry and Biomedical Sciences, Belfast, UK
| | | | | | | | | | - Victor L Perez
- Foster Center for Ocular Immunology, Duke University Eye Center, Durham, NC, USA
| | - David Zadok
- Shaare Zedek Medical Center, Affiliated to the Hebrew University, School of Medicine, Jerusalem, Israel
| | - Mark D P Willcox
- School of Optometry and Vision Science, University of New South Wales, Sydney, Australia
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Lee H, Youn I, Demissie R, Vaid TM, Che CT, Azar DT, Han KY. Identification of small molecule inhibitors against MMP-14 via High-Throughput screening. Bioorg Med Chem 2023; 85:117289. [PMID: 37094433 PMCID: PMC10167624 DOI: 10.1016/j.bmc.2023.117289] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2022] [Revised: 03/22/2023] [Accepted: 04/13/2023] [Indexed: 04/26/2023]
Abstract
Matrix metalloproteinases (MMPs) are involved in various cellular events in physiology and pathophysiology through endopeptidases activity. The expression levels and activities of most MMPs remain minimal in the normal conditions, whereas some MMPs are significantly activated in pathological conditions such as cancer and neovascularization. Hence, MMPs are considered as both diagnostic markers and potential targets for therapeutic agents. Twenty-three known human MMPs share a similar active site structure with a zinc-binding motif, resulting in lack of specificity. Therefore, the enhancement of target specificity is a primary goal for the development of specific MMP inhibitors. MMP-14 regulates VEGFA/VEGFR2-system through cleavage of the non-functional VEGFR1 in vascular angiogenesis. In this study, we developed a fluorescence-based enzymatic assay using a specific MMP-14 substrate generated from VEGFR1 cleavage site. This well optimized assay was used as a primary screen method to identify MMP-14 specific inhibitors from 1,200 Prestwick FDA-approved drug library. Of ten initial hits, two compounds showed IC50 values below 30 µM, which were further validated by direct binding analysis using surface plasmon resonance (SPR). Clioquinol and chloroxine, both of which contain a quinoline structure, were identified as MMP-14 inhibitors. Five analogs were tested, four of which were found to be completely devoid of inhibitory activity. Clioquinol exhibited selectivity towards MMP-14, as it showed no inhibitory activity towards four other MMPs.
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Affiliation(s)
- Hyun Lee
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Illinois at Chicago, Chicago, IL 60607, USA; Biophysics Core at Research Resource Center, University of Illinois at Chicago, Chicago, IL 60607, USA
| | - Isoo Youn
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Illinois at Chicago, Chicago, IL 60607, USA
| | - Robel Demissie
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Illinois at Chicago, Chicago, IL 60607, USA; Biophysics Core at Research Resource Center, University of Illinois at Chicago, Chicago, IL 60607, USA
| | - Tasneem M Vaid
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Illinois at Chicago, Chicago, IL 60607, USA
| | - Chun-Tao Che
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Illinois at Chicago, Chicago, IL 60607, USA
| | - Dimitri T Azar
- Department of Ophthalmology and Visual Sciences, Illinois Eye and Ear Infirmary, University of Illinois at Chicago, Chicago, IL 60612, USA
| | - Kyu-Yeon Han
- Department of Ophthalmology and Visual Sciences, Illinois Eye and Ear Infirmary, University of Illinois at Chicago, Chicago, IL 60612, USA.
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Patnam M, Dommaraju SR, Masood F, Herbst P, Chang JH, Hu WY, Rosenblatt MI, Azar DT. Lymphangiogenesis Guidance Mechanisms and Therapeutic Implications in Pathological States of the Cornea. Cells 2023; 12:cells12020319. [PMID: 36672254 PMCID: PMC9856498 DOI: 10.3390/cells12020319] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2022] [Revised: 12/22/2022] [Accepted: 01/11/2023] [Indexed: 01/18/2023] Open
Abstract
Corneal lymphangiogenesis is one component of the neovascularization observed in several inflammatory pathologies of the cornea including dry eye disease and corneal graft rejection. Following injury, corneal (lymph)angiogenic privilege is impaired, allowing ingrowth of blood and lymphatic vessels into the previously avascular cornea. While the mechanisms underlying pathological corneal hemangiogenesis have been well described, knowledge of the lymphangiogenesis guidance mechanisms in the cornea is relatively scarce. Various signaling pathways are involved in lymphangiogenesis guidance in general, each influencing one or multiple stages of lymphatic vessel development. Most endogenous factors that guide corneal lymphatic vessel growth or regression act via the vascular endothelial growth factor C signaling pathway, a central regulator of lymphangiogenesis. Several exogenous factors have recently been repurposed and shown to regulate corneal lymphangiogenesis, uncovering unique signaling pathways not previously known to influence lymphatic vessel guidance. A strong understanding of the relevant lymphangiogenesis guidance mechanisms can facilitate the development of targeted anti-lymphangiogenic therapeutics for corneal pathologies. In this review, we examine the current knowledge of lymphatic guidance cues, their regulation of inflammatory states in the cornea, and recently discovered anti-lymphangiogenic therapeutic modalities.
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Affiliation(s)
- Mehul Patnam
- Department of Ophthalmology and Visual Sciences, Illinois Eye and Ear Infirmary, College of Medicine, University of Illinois at Chicago, Chicago, IL 60612, USA
| | - Sunil R. Dommaraju
- Department of Ophthalmology and Visual Sciences, Illinois Eye and Ear Infirmary, College of Medicine, University of Illinois at Chicago, Chicago, IL 60612, USA
| | - Faisal Masood
- Department of Ophthalmology and Visual Sciences, Illinois Eye and Ear Infirmary, College of Medicine, University of Illinois at Chicago, Chicago, IL 60612, USA
| | - Paula Herbst
- Department of Ophthalmology and Visual Sciences, Illinois Eye and Ear Infirmary, College of Medicine, University of Illinois at Chicago, Chicago, IL 60612, USA
| | - Jin-Hong Chang
- Department of Ophthalmology and Visual Sciences, Illinois Eye and Ear Infirmary, College of Medicine, University of Illinois at Chicago, Chicago, IL 60612, USA
- Correspondence: ; Tel.: +1-(312)-413-5590; Fax: +1-(312)-996-7770
| | - Wen-Yang Hu
- Department of Urology, University of Illinois at Chicago, Chicago, IL 60612, USA
| | - Mark I. Rosenblatt
- Department of Ophthalmology and Visual Sciences, Illinois Eye and Ear Infirmary, College of Medicine, University of Illinois at Chicago, Chicago, IL 60612, USA
| | - Dimitri T. Azar
- Department of Ophthalmology and Visual Sciences, Illinois Eye and Ear Infirmary, College of Medicine, University of Illinois at Chicago, Chicago, IL 60612, USA
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Masood F, Bhattaram R, Rosenblatt MI, Kazlauskas A, Chang JH, Azar DT. Lymphatic Vessel Regression and Its Therapeutic Applications: Learning From Principles of Blood Vessel Regression. Front Physiol 2022; 13:846936. [PMID: 35392370 PMCID: PMC8980686 DOI: 10.3389/fphys.2022.846936] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2021] [Accepted: 02/25/2022] [Indexed: 02/03/2023] Open
Abstract
Aberrant lymphatic system function has been increasingly implicated in pathologies such as lymphedema, organ transplant rejection, cardiovascular disease, obesity, and neurodegenerative diseases including Alzheimer's disease and Parkinson's disease. While some pathologies are exacerbated by lymphatic vessel regression and dysfunction, induced lymphatic regression could be therapeutically beneficial in others. Despite its importance, our understanding of lymphatic vessel regression is far behind that of blood vessel regression. Herein, we review the current understanding of blood vessel regression to identify several hallmarks of this phenomenon that can be extended to further our understanding of lymphatic vessel regression. We also summarize current research on lymphatic vessel regression and an array of research tools and models that can be utilized to advance this field. Additionally, we discuss the roles of lymphatic vessel regression and dysfunction in select pathologies, highlighting how an improved understanding of lymphatic vessel regression may yield therapeutic insights for these disease states.
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Chennakesavalu M, Somala SRR, Dommaraju SR, Peesapati MP, Guo K, Rosenblatt MI, Chang JH, Azar DT. Corneal lymphangiogenesis as a potential target in dry eye disease - a systematic review. Surv Ophthalmol 2021; 66:960-976. [PMID: 33811911 PMCID: PMC9991079 DOI: 10.1016/j.survophthal.2021.03.007] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2020] [Revised: 03/17/2021] [Accepted: 03/22/2021] [Indexed: 02/03/2023]
Abstract
Dry eye disease (DED) is a common ocular surface condition causing symptoms of significant discomfort, visual disturbance, and pain. With recent advancements, DED has become recognized as a chronic self-perpetuating inflammatory condition triggered by various internal and environmental factors. DED has been shown to arise from the activation of both the innate and adaptive immune systems, leading to corneal epithelium and lacrimal gland dysfunction. While the cornea is normally avascular and thus imbued with angiogenic and lymphangiogenic privilege, various DED models have revealed activated corneal antigen-presenting cells in regional lymph nodes, suggesting the formation of new corneal lymphatic vessels in DED. The recent availability of reliable lymphatic cell surface markers such as LYVE-1 has made it possible to study lymphangiogenesis. Accordingly, numerous studies have been published within the last decade discussing the role of lymphangiogenesis in DED pathology. We systematically review the literature to identify and evaluate studies presenting data on corneal lymphangiogenesis in DED. There is considerable evidence supporting corneal lymphangiogenesis as a central mediator of DED pathogenesis. These findings suggest that anti-lymphangiogenic therapeutic strategies may be a viable option for the treatment of DED, a conclusion supported by the limited number of reported clinical trials examining anti-lymphangiogenic modalities in DED.
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Affiliation(s)
- Mohansrinivas Chennakesavalu
- Department of Ophthalmology and Visual Sciences, Illinois Eye and Ear Infirmary, College of Medicine, University of Illinois at Chicago, Chicago, IL
| | - Sri Raghurama R Somala
- Department of Ophthalmology and Visual Sciences, Illinois Eye and Ear Infirmary, College of Medicine, University of Illinois at Chicago, Chicago, IL
| | - Sunil R Dommaraju
- Department of Ophthalmology and Visual Sciences, Illinois Eye and Ear Infirmary, College of Medicine, University of Illinois at Chicago, Chicago, IL
| | - Meghna Priyanka Peesapati
- Department of Ophthalmology and Visual Sciences, Illinois Eye and Ear Infirmary, College of Medicine, University of Illinois at Chicago, Chicago, IL
| | - Kai Guo
- Department of Ophthalmology and Visual Sciences, Illinois Eye and Ear Infirmary, College of Medicine, University of Illinois at Chicago, Chicago, IL
| | - Mark I Rosenblatt
- Department of Ophthalmology and Visual Sciences, Illinois Eye and Ear Infirmary, College of Medicine, University of Illinois at Chicago, Chicago, IL
| | - Jin-Hong Chang
- Department of Ophthalmology and Visual Sciences, Illinois Eye and Ear Infirmary, College of Medicine, University of Illinois at Chicago, Chicago, IL.
| | - Dimitri T Azar
- Department of Ophthalmology and Visual Sciences, Illinois Eye and Ear Infirmary, College of Medicine, University of Illinois at Chicago, Chicago, IL
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Gatinel D, Malet J, Dumas L, Azar DT. Comparison of Low Degree/High Degree and Zernike Expansions for Evaluating Simulation Outcomes After Customized Aspheric Laser Corrections. Transl Vis Sci Technol 2021; 10:21. [PMID: 34003958 PMCID: PMC7991963 DOI: 10.1167/tvst.10.3.21] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
Abstract
Purpose The purpose of this study was to compare the low degree/high degree (LD/HD) and Zernike Expansion simulation outcomes evaluating the corneal wavefront changes after theoretical conventional and customized aspheric photorefractive ablations. Methods Initial anterior corneal surface profiles were modeled as conic sections with pre-operative apical curvature, R0, and asphericity, Q0. Postoperative apical curvature, R1, was computed from intended defocus correction, D, diameter zone, S, and target postoperative asphericity, Q1. Coefficients of both Zernike and LD/HD polynomial expansions of the rotationally symmetrical corneal profile were computed using scalar products. We modeled different values of D, R0, Q0, S, and ΔQ = Q1 to Q0. The corresponding postoperative changes in defocus (Δz20 vs. Δg20), fourth order (Δz40 vs. Δg40) and sixth order (Δz60 vs. Δg60) Zernike and LD/HD spherical aberrations (SAs) were compared. In addition, retrospective clinical data and wavefront measurements were obtained from two examples of two patient eyes before and after corneal laser photoablation. Results The z20, varied with both R0 and Q0, whereas the LD/HD defocus coefficient, g20, was relatively robust to changes in asphericity. Variations of apical curvature better correlated with defocus and ΔQ with SA coefficients in the LD/HD classification. The impact of ΔQ was null on g20 but induced significant linear variations in z20 and fourth order SA coefficients. LD/HD coefficients provided a good correlation with the visual performances of the operated eyes. Conclusions Simulated variations in postoperative corneal profile and wavefront expansion using the LD/HD approach showed good correlations between defocus and asphericity variations with variations in corneal curvature and SA coefficients, respectively. Translational Relevance The relevance of this study was to provide a clinically relevant alternative to Zernike polynomials for the interpretation of wavefront changes after customized aspheric corrections.
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Affiliation(s)
- Damien Gatinel
- Department of Anterior Segment and Refractive Surgery, Rothschild Ophthalmic Foundation Hospital, Paris, France
| | - Jacques Malet
- Department of Anterior Segment and Refractive Surgery, Rothschild Ophthalmic Foundation Hospital, Paris, France
| | - Laurent Dumas
- Laboratoire de Mathématiques de Versailles, UVSQ, CNRS, Université Paris-Saclay, Versailles, France
| | - Dimitri T Azar
- Department of Ophthalmology and Visual Sciences, University of Illinois at Chicago College of Medicine, Chicago, IL, USA
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Han KY, Chang JH, Azar DT. Proteomics-Based Characterization of the Effects of MMP14 on the Protein Content of Exosomes from Corneal Fibroblasts. Protein Pept Lett 2021; 27:979-988. [PMID: 32268857 DOI: 10.2174/0929866527666200408142827] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2019] [Revised: 02/15/2020] [Accepted: 02/17/2020] [Indexed: 12/17/2022]
Abstract
BACKGROUND Exosomes secreted by corneal fibroblasts contain matrix metalloproteinase (MMP) 14, which is known to influence pro-MMP2 accumulation on exosomes. Accordingly, we hypothesized that the enzymatic activity of MMP14 may alter the protein content of corneal fibroblast- secreted exosomes. OBJECTIVE The aim of this study was to investigate the effects of MMP14 on the composition and biological activity of corneal fibroblast-derived exosomes. METHODS Knock out of the catalytic domain (ΔExon4) of MMP14 in corneal fibroblasts was used to determine the effect of MMP14 expression on the characteristics of fibroblast-secreted exosomes. The amount of secreted proteins and their size distribution were measured using Nano Tracking Analysis. Proteins within exosomes from wild-type (WT) and ΔExon4-deficient fibroblasts were identified by liquid chromatography-tandem mass spectrometry (MS/MS) proteomics analysis. The proteolytic effects of MMP14 were evaluated in vitro via MS identification of eliminated proteins. The biological functions of MMP14-carrying exosomes were investigated via fusion to endothelial cells and flow cytometric assays. RESULTS Exosomes isolated from WT and ΔExon4-deficient fibroblasts exhibited similar size distributions and morphologies, although WT fibroblasts secreted a greater amount of exosomes. The protein content, however, was higher in ΔExon4-deficient fibroblast-derived exosomes than in WT fibroblast-derived exosomes. Proteomics analysis revealed that WT-derived exosomes included proteins that regulated cell migration, and ΔExon4 fibroblast-derived exosomes contained additional proteins that were cleaved by MMP14. CONCLUSION Our findings suggest that MMP14 expression influences the protein composition of exosomes secreted by corneal fibroblasts, and through those biological components, MMP14 in corneal fibroblasts derived-exosomes may regulate corneal angiogenesis.
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Affiliation(s)
- Kyu-Yeon Han
- Department of Ophthalmology and Visual Sciences, Illinois Eye and Ear Infirmary, College of Medicine, University of Illinois at Chicago, Chicago, IL 60612, United States
| | - Jin-Hong Chang
- Department of Ophthalmology and Visual Sciences, Illinois Eye and Ear Infirmary, College of Medicine, University of Illinois at Chicago, Chicago, IL 60612, United States
| | - Dimitri T Azar
- Department of Ophthalmology and Visual Sciences, Illinois Eye and Ear Infirmary, College of Medicine, University of Illinois at Chicago, Chicago, IL 60612, United States
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Affiliation(s)
- Joelle A Hallak
- Department of Ophthalmology and Visual Sciences, University of Illinois at Chicago, Chicago, IL, USA
| | - Dimitri T Azar
- Department of Ophthalmology and Visual Sciences, University of Illinois at Chicago, Chicago, IL, USA.,Alphabet Verily Life Sciences, San Francisco, CA, USA
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Santosa SM, Guo K, Yamakawa M, Ivakhnitskaia E, Chawla N, Nguyen T, Han KY, Ema M, Rosenblatt MI, Chang JH, Azar DT. Simultaneous fluorescence imaging of distinct nerve and blood vessel patterns in dual Thy1-YFP and Flt1-DsRed transgenic mice. Angiogenesis 2020; 23:459-477. [PMID: 32372335 DOI: 10.1007/s10456-020-09724-y] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2020] [Accepted: 04/23/2020] [Indexed: 02/08/2023]
Abstract
Blood vessels and nerve tissues are critical to the development and functionality of many vital organs. However, little is currently known about their interdependency during development and after injury. In this study, dual fluorescence transgenic reporter mice were utilized to observe blood vessels and nervous tissues in organs postnatally. Thy1-YFP and Flt1-DsRed (TYFD) mice were interbred to achieve dual fluorescence in the offspring, with Thy1-YFP yellow fluorescence expressed primarily in nerves, and Flt1-DsRed fluorescence expressed selectively in blood vessels. Using this dual fluorescent mouse strain, we were able to visualize the networks of nervous and vascular tissue simultaneously in various organ systems both in the physiological state and after injury. Using ex vivo high-resolution imaging in this dual fluorescent strain, we characterized the organizational patterns of both nervous and vascular systems in a diverse set of organs and tissues. In the cornea, we also observed the dynamic patterns of nerve and blood vessel networks following epithelial debridement injury. These findings highlight the versatility of this dual fluorescent strain for characterizing the relationship between nerve and blood vessel growth and organization.
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Affiliation(s)
- Samuel M Santosa
- Department of Ophthalmology and Visual Sciences, Illinois Eye and Ear Infirmary, College of Medicine, University of Illinois at Chicago, Chicago, IL, USA
| | - Kai Guo
- Department of Ophthalmology and Visual Sciences, Illinois Eye and Ear Infirmary, College of Medicine, University of Illinois at Chicago, Chicago, IL, USA
| | - Michael Yamakawa
- Department of Ophthalmology and Visual Sciences, Illinois Eye and Ear Infirmary, College of Medicine, University of Illinois at Chicago, Chicago, IL, USA
| | - Evguenia Ivakhnitskaia
- Department of Ophthalmology and Visual Sciences, Illinois Eye and Ear Infirmary, College of Medicine, University of Illinois at Chicago, Chicago, IL, USA
| | - Neeraj Chawla
- Department of Ophthalmology and Visual Sciences, Illinois Eye and Ear Infirmary, College of Medicine, University of Illinois at Chicago, Chicago, IL, USA
| | - Tara Nguyen
- Department of Ophthalmology and Visual Sciences, Illinois Eye and Ear Infirmary, College of Medicine, University of Illinois at Chicago, Chicago, IL, USA
| | - Kyu-Yeon Han
- Department of Ophthalmology and Visual Sciences, Illinois Eye and Ear Infirmary, College of Medicine, University of Illinois at Chicago, Chicago, IL, USA
| | - Masatsugu Ema
- Department of Stem Cells and Human Disease Models, Shiga University of Medical Science, Seta, Tsukinowa-cho, Otsu, Shiga, Japan
| | - Mark I Rosenblatt
- Department of Ophthalmology and Visual Sciences, Illinois Eye and Ear Infirmary, College of Medicine, University of Illinois at Chicago, Chicago, IL, USA
| | - Jin-Hong Chang
- Department of Ophthalmology and Visual Sciences, Illinois Eye and Ear Infirmary, College of Medicine, University of Illinois at Chicago, Chicago, IL, USA.
| | - Dimitri T Azar
- Department of Ophthalmology and Visual Sciences, Illinois Eye and Ear Infirmary, College of Medicine, University of Illinois at Chicago, Chicago, IL, USA.
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Yamakawa M, Santosa SM, Chawla N, Ivakhnitskaia E, Del Pino M, Giakas S, Nadel A, Bontu S, Tambe A, Guo K, Han KY, Cortina MS, Yu C, Rosenblatt MI, Chang JH, Azar DT. Transgenic models for investigating the nervous system: Currently available neurofluorescent reporters and potential neuronal markers. Biochim Biophys Acta Gen Subj 2020; 1864:129595. [PMID: 32173376 DOI: 10.1016/j.bbagen.2020.129595] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2019] [Revised: 02/24/2020] [Accepted: 03/03/2020] [Indexed: 02/06/2023]
Abstract
Recombinant DNA technologies have enabled the development of transgenic animal models for use in studying a myriad of diseases and biological states. By placing fluorescent reporters under the direct regulation of the promoter region of specific marker proteins, these models can localize and characterize very specific cell types. One important application of transgenic species is the study of the cytoarchitecture of the nervous system. Neurofluorescent reporters can be used to study the structural patterns of nerves in the central or peripheral nervous system in vivo, as well as phenomena involving embryologic or adult neurogenesis, injury, degeneration, and recovery. Furthermore, crucial molecular factors can also be screened via the transgenic approach, which may eventually play a major role in the development of therapeutic strategies against diseases like Alzheimer's or Parkinson's. This review describes currently available reporters and their uses in the literature as well as potential neural markers that can be leveraged to create additional, robust transgenic models for future studies.
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Affiliation(s)
- Michael Yamakawa
- Department of Ophthalmology and Visual Sciences, Illinois Eye and Ear Infirmary, College of Medicine, University of Illinois at Chicago, Chicago, IL, United States of America
| | - Samuel M Santosa
- Department of Ophthalmology and Visual Sciences, Illinois Eye and Ear Infirmary, College of Medicine, University of Illinois at Chicago, Chicago, IL, United States of America
| | - Neeraj Chawla
- Department of Ophthalmology and Visual Sciences, Illinois Eye and Ear Infirmary, College of Medicine, University of Illinois at Chicago, Chicago, IL, United States of America
| | - Evguenia Ivakhnitskaia
- Department of Ophthalmology and Visual Sciences, Illinois Eye and Ear Infirmary, College of Medicine, University of Illinois at Chicago, Chicago, IL, United States of America
| | - Matthew Del Pino
- Department of Ophthalmology and Visual Sciences, Illinois Eye and Ear Infirmary, College of Medicine, University of Illinois at Chicago, Chicago, IL, United States of America
| | - Sebastian Giakas
- Department of Ophthalmology and Visual Sciences, Illinois Eye and Ear Infirmary, College of Medicine, University of Illinois at Chicago, Chicago, IL, United States of America
| | - Arnold Nadel
- Department of Ophthalmology and Visual Sciences, Illinois Eye and Ear Infirmary, College of Medicine, University of Illinois at Chicago, Chicago, IL, United States of America
| | - Sneha Bontu
- Department of Ophthalmology and Visual Sciences, Illinois Eye and Ear Infirmary, College of Medicine, University of Illinois at Chicago, Chicago, IL, United States of America
| | - Arjun Tambe
- Department of Ophthalmology and Visual Sciences, Illinois Eye and Ear Infirmary, College of Medicine, University of Illinois at Chicago, Chicago, IL, United States of America
| | - Kai Guo
- Department of Ophthalmology and Visual Sciences, Illinois Eye and Ear Infirmary, College of Medicine, University of Illinois at Chicago, Chicago, IL, United States of America
| | - Kyu-Yeon Han
- Department of Ophthalmology and Visual Sciences, Illinois Eye and Ear Infirmary, College of Medicine, University of Illinois at Chicago, Chicago, IL, United States of America
| | - Maria Soledad Cortina
- Department of Ophthalmology and Visual Sciences, Illinois Eye and Ear Infirmary, College of Medicine, University of Illinois at Chicago, Chicago, IL, United States of America
| | - Charles Yu
- Department of Ophthalmology and Visual Sciences, Illinois Eye and Ear Infirmary, College of Medicine, University of Illinois at Chicago, Chicago, IL, United States of America
| | - Mark I Rosenblatt
- Department of Ophthalmology and Visual Sciences, Illinois Eye and Ear Infirmary, College of Medicine, University of Illinois at Chicago, Chicago, IL, United States of America
| | - Jin-Hong Chang
- Department of Ophthalmology and Visual Sciences, Illinois Eye and Ear Infirmary, College of Medicine, University of Illinois at Chicago, Chicago, IL, United States of America.
| | - Dimitri T Azar
- Department of Ophthalmology and Visual Sciences, Illinois Eye and Ear Infirmary, College of Medicine, University of Illinois at Chicago, Chicago, IL, United States of America.
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12
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Wang S, Yamakawa M, Santosa SM, Chawla N, Guo K, Montana M, Hallak JA, Han KY, Ema M, Rosenblatt MI, Chang JH, Azar DT. Quantification of Angiogenesis and Lymphangiogenesis in the Dual ex vivo Aortic and Thoracic Duct Assay. Protein Pept Lett 2020; 27:30-40. [PMID: 31553284 PMCID: PMC6978644 DOI: 10.2174/0929866526666190925145842] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2019] [Revised: 07/02/2019] [Accepted: 07/07/2019] [Indexed: 12/22/2022]
Abstract
Abstract: Background Lymphatic vessel formation (lymphangiogenesis) plays important roles in cancer metastasis, organ rejection, and lymphedema, but the underlying molecular events remain unclear. Furthermore, despite significant overlap in the molecular families involved in angiogenesis and lymphangiogenesis, little is known about the crosstalk between these processes. The ex vivo aortic ring assay and lymphatic ring assay have enabled detailed studies of vessel sprouting, but harvesting and imaging clear thoracic duct samples remain challenging. Here we present a modified ex vivo dual aortic ring and thoracic duct assay using tissues from dual fluorescence reporter Prox1-GFP/Flt1-DsRed (PGFD) mice, which permit simultaneous visualization of blood and lymphatic endothelial cells. Objective To characterize the concurrent sprouting of intrinsically fluorescent blood and lymphatic vessels from harvested aorta and thoracic duct samples. Methods Dual aorta and thoracic duct specimens were harvested from PGFD mice, grown in six types of endothelial cell growth media (one control, five that each lack a specific growth factor), and visualized by confocal fluorescence microscopy. Linear mixed models were used to compare the extent of vessel growth and sprouting over a 28-day period. Results Angiogenesis occurred prior to lymphangiogenesis in our assay. The control medium generally induced superior growth of both vessel types compared with the different modified media formulations. The greatest decrease in lymphangiogenesis was observed in vascular endothelial growth factor-C (VEGF-C)-devoid medium, suggesting the importance of VEGF-C in lymphangiogenesis. Conclusion The modified ex vivo dual aortic ring and thoracic duct assay represents a powerful tool for studying angiogenesis and lymphangiogenesis in concert.
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Affiliation(s)
- Shuangyong Wang
- Department of Ophthalmology and Visual Sciences, Illinois Eye and Ear Infirmary, College of Medicine, University of Illinois at Chicago, Chicago, IL, United States
| | - Michael Yamakawa
- Department of Ophthalmology and Visual Sciences, Illinois Eye and Ear Infirmary, College of Medicine, University of Illinois at Chicago, Chicago, IL, United States
| | - Samuel M Santosa
- Department of Ophthalmology and Visual Sciences, Illinois Eye and Ear Infirmary, College of Medicine, University of Illinois at Chicago, Chicago, IL, United States
| | - Neeraj Chawla
- Department of Ophthalmology and Visual Sciences, Illinois Eye and Ear Infirmary, College of Medicine, University of Illinois at Chicago, Chicago, IL, United States
| | - Kai Guo
- Department of Ophthalmology and Visual Sciences, Illinois Eye and Ear Infirmary, College of Medicine, University of Illinois at Chicago, Chicago, IL, United States
| | - Mario Montana
- Department of Ophthalmology and Visual Sciences, Illinois Eye and Ear Infirmary, College of Medicine, University of Illinois at Chicago, Chicago, IL, United States
| | - Joelle A Hallak
- Department of Ophthalmology and Visual Sciences, Illinois Eye and Ear Infirmary, College of Medicine, University of Illinois at Chicago, Chicago, IL, United States
| | - Kyu-Yeon Han
- Department of Ophthalmology and Visual Sciences, Illinois Eye and Ear Infirmary, College of Medicine, University of Illinois at Chicago, Chicago, IL, United States
| | - Masatsugu Ema
- Department of Stem Cells and Human Disease Models, Shia University of Medical Science, Otsu, Japan
| | - Mark I Rosenblatt
- Department of Ophthalmology and Visual Sciences, Illinois Eye and Ear Infirmary, College of Medicine, University of Illinois at Chicago, Chicago, IL, United States
| | - Jin-Hong Chang
- Department of Ophthalmology and Visual Sciences, Illinois Eye and Ear Infirmary, College of Medicine, University of Illinois at Chicago, Chicago, IL, United States
| | - Dimitri T Azar
- Department of Ophthalmology and Visual Sciences, Illinois Eye and Ear Infirmary, College of Medicine, University of Illinois at Chicago, Chicago, IL, United States
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13
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Gao X, Guo K, Santosa SM, Montana M, Yamakawa M, Hallak JA, Han KY, Doh SJ, Rosenblatt MI, Chang JH, Azar DT. Application of corneal injury models in dual fluorescent reporter transgenic mice to understand the roles of the cornea and limbus in angiogenic and lymphangiogenic privilege. Sci Rep 2019; 9:12331. [PMID: 31444394 PMCID: PMC6707148 DOI: 10.1038/s41598-019-48811-z] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2018] [Accepted: 08/08/2019] [Indexed: 12/31/2022] Open
Abstract
The role of the corneal epithelium and limbus in corneal avascularity and pathological neovascularization (NV) is not well understood. To investigate the contributions of the corneal and limbal epithelia in angiogenic and lymphangiogenic privilege, we designed five injury models involving debridement of different portions of the cornea and limbus and applied them to the dual-fluorescence reporter Prox1-GFP/Flt1-DsRed mouse, which permits in vivo imaging of blood and lymphatic vessels via fluorescence microscopy. Debridement of the whole cornea resulted in significant hemangiogenesis (HA) and lymphangiogenesis (LA), while that of the whole limbus yielded minimal corneal HA or LA. Following hemilimbal plus whole corneal debridement, corneal NV occurred only through the non-injured aspect of the limbus. Overall, these results suggest that the integrity of the corneal epithelium is important for (lymph)angiogenic privilege, whereas the limbus does not act as a physical or physiologic barrier to invading vessels. In CDh5-CreERT2VEGFR2lox/PGFD mice, conditional deletion of vascular endothelial growth factor receptor 2 in vascular endothelial cells abolished injury-induced HA and LA, demonstrating the utility of this transgenic mouse line for identifying important factors in the process of neovascularization.
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Affiliation(s)
- Xinbo Gao
- Department of Ophthalmology and Visual Sciences, Illinois Eye and Ear Infirmary, College of Medicine, University of Illinois at Chicago, Chicago, Illinois, USA
| | - Kai Guo
- Department of Ophthalmology and Visual Sciences, Illinois Eye and Ear Infirmary, College of Medicine, University of Illinois at Chicago, Chicago, Illinois, USA
| | - Samuel M Santosa
- Department of Ophthalmology and Visual Sciences, Illinois Eye and Ear Infirmary, College of Medicine, University of Illinois at Chicago, Chicago, Illinois, USA
| | - Mario Montana
- Department of Ophthalmology and Visual Sciences, Illinois Eye and Ear Infirmary, College of Medicine, University of Illinois at Chicago, Chicago, Illinois, USA
| | - Michael Yamakawa
- Department of Ophthalmology and Visual Sciences, Illinois Eye and Ear Infirmary, College of Medicine, University of Illinois at Chicago, Chicago, Illinois, USA
| | - Joelle A Hallak
- Department of Ophthalmology and Visual Sciences, Illinois Eye and Ear Infirmary, College of Medicine, University of Illinois at Chicago, Chicago, Illinois, USA
| | - Kyu-Yeon Han
- Department of Ophthalmology and Visual Sciences, Illinois Eye and Ear Infirmary, College of Medicine, University of Illinois at Chicago, Chicago, Illinois, USA
| | - Susan J Doh
- Department of Ophthalmology and Visual Sciences, Illinois Eye and Ear Infirmary, College of Medicine, University of Illinois at Chicago, Chicago, Illinois, USA
| | - Mark I Rosenblatt
- Department of Ophthalmology and Visual Sciences, Illinois Eye and Ear Infirmary, College of Medicine, University of Illinois at Chicago, Chicago, Illinois, USA
| | - Jin-Hong Chang
- Department of Ophthalmology and Visual Sciences, Illinois Eye and Ear Infirmary, College of Medicine, University of Illinois at Chicago, Chicago, Illinois, USA.
| | - Dimitri T Azar
- Department of Ophthalmology and Visual Sciences, Illinois Eye and Ear Infirmary, College of Medicine, University of Illinois at Chicago, Chicago, Illinois, USA.
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14
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Han KY, Chang JH, Azar DT. MMP14-Containing Exosomes Cleave VEGFR1 and Promote VEGFA-Induced Migration and Proliferation of Vascular Endothelial Cells. Invest Ophthalmol Vis Sci 2019; 60:2321-2329. [PMID: 31117124 PMCID: PMC6532701 DOI: 10.1167/iovs.18-26277] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2018] [Accepted: 04/17/2019] [Indexed: 12/17/2022] Open
Abstract
Purpose Investigate the impact matrix metalloproteinase 14 (MMP14) delivered via exosomes produced by corneal fibroblasts on vascular endothelial growth factor receptor 1 (VEGFR1) cleavage on endothelial cells, and other key processes of angiogenesis. Methods Proteolysis of VEGFR1 and R2 by the catalytic domain of MMP14 was investigated via immunocytochemistry with anti-VEGFR1, anti-VEGFR2, and anti-MMP14 antibodies. Exosomes were isolated via precipitation and serial ultracentrifugation from wild-type (WT) and MMP14 exon4-deficient corneal fibroblasts. Transmission electron microscopy and nanotracking analysis were used to characterize the isolated exosomes. The presence of MMP14 in exosomes from WT fibroblasts was confirmed by Western blotting. VEGFR1 cleavage upon treatment with WT-derived exosomes, Δexon4-derived exosomes, or the pan-MMP inhibitor GM60001 was examined via in vitro proteolysis analysis using recombinant mouse (rm) VEGFR1/R2. Endothelial cell migration and proliferation were investigated using a Boyden chamber assay and BrdU incorporation, respectively. Results WT-derived exosomes specifically cleaved rmVEGFR1 in vitro, whereas Δexon4-derived exosomes did not. Treatment with the pan-MMP inhibitor GM6001 effectively inhibited VEGFR1 cleavage by WT-derived exosomes, confirming the role of MMP14 in this cleavage. WT-derived exosomes induced greater endothelial cell migration (P < 0.01) and proliferation (P < 0.5) compared to Δexon4-derived exosomes. Conclusions MMP14-containing exosomes may be involved in the regulation of corneal neovascularization through degradation of VEGFR1 and VEGFA-induced endothelial cell proliferation and migration.
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Affiliation(s)
- Kyu-Yeon Han
- Department of Ophthalmology and Visual Sciences, Illinois Eye and Ear Infirmary, College of Medicine, University of Illinois-Chicago, Chicago, Illinois, United States
| | - Jin-Hong Chang
- Department of Ophthalmology and Visual Sciences, Illinois Eye and Ear Infirmary, College of Medicine, University of Illinois-Chicago, Chicago, Illinois, United States
| | - Dimitri T. Azar
- Department of Ophthalmology and Visual Sciences, Illinois Eye and Ear Infirmary, College of Medicine, University of Illinois-Chicago, Chicago, Illinois, United States
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15
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Doh SJ, Yamakawa M, Santosa SM, Montana M, Guo K, Sauer JR, Curran N, Han KY, Yu C, Ema M, Rosenblatt MI, Chang JH, Azar DT. Fluorescent reporter transgenic mice for in vivo live imaging of angiogenesis and lymphangiogenesis. Angiogenesis 2018; 21:677-698. [PMID: 29971641 DOI: 10.1007/s10456-018-9629-2] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2018] [Accepted: 06/26/2018] [Indexed: 12/29/2022]
Abstract
The study of lymphangiogenesis is an emerging science that has revealed the lymphatic system as a central player in many pathological conditions including cancer metastasis, lymphedema, and organ graft rejection. A thorough understanding of the mechanisms of lymphatic growth will play a key role in the development of therapeutic strategies against these conditions. Despite the known potential of this field, the study of lymphatics has historically lagged behind that of hemangiogenesis. Until recently, significant strides in lymphatic studies were impeded by a lack of lymphatic-specific markers and suitable experimental models compared to those of the more immediately visible blood vasculature. Lymphangiogenesis has also been shown to be a key phenomenon in developmental biological processes, such as cell proliferation, guided migration, differentiation, and cell-to-cell communication, making lymphatic-specific visualization techniques highly desirable and desperately needed. Imaging modalities including immunohistochemistry and in situ hybridization are limited by the need to sacrifice animal models for tissue harvesting at every experimental time point. Moreover, the processes of mounting and staining harvested tissues may introduce artifacts that can confound results. These traditional methods for investigating lymphatic and blood vasculature are associated with several problems including animal variability (e.g., between mice) when replicating lymphatic growth environments and the cost concerns of prolonged, labor-intensive studies, all of which complicate the study of dynamic lymphatic processes. With the discovery of lymphatic-specific markers, researchers have been able to develop several lymphatic and blood vessel-specific, promoter-driven, fluorescent-reporter transgenic mice for visualization of lymphatics in vivo and in vitro. For instance, GFP, mOrange, tdTomato, and other fluorescent proteins can be expressed under control of a lymphatic-specific marker like Prospero-related homeobox 1 (Prox1), which is a highly conserved transcription factor for determining embryonic organogenesis in vertebrates that is implicated in lymphangiogenesis as well as several human cancers. Importantly, Prox1-null mouse embryos develop without lymphatic vessels. In human adults, Prox1 maintains lymphatic endothelial cells and upregulates proteins associated with lymphangiogenesis (e.g., VEGFR-3) and downregulates angiogenesis-associated gene expression (e.g., STAT6). To visualize lymphatic development in the context of angiogenesis, dual fluorescent-transgenic reporters, like Prox1-GFP/Flt1-DsRed mice, have been bred to characterize lymphatic and blood vessels simultaneously in vivo. In this review, we discuss the trends in lymphatic visualization and the potential usage of transgenic breeds in hemangiogenesis and lymphangiogenesis research to understand spatial and temporal correlations between vascular development and pathological progression.
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Affiliation(s)
- Susan J Doh
- Department of Ophthalmology and Visual Sciences, Illinois Eye and Ear Infirmary, College of Medicine, University of Illinois at Chicago, Chicago, IL, USA
| | - Michael Yamakawa
- Department of Ophthalmology and Visual Sciences, Illinois Eye and Ear Infirmary, College of Medicine, University of Illinois at Chicago, Chicago, IL, USA
| | - Samuel M Santosa
- Department of Ophthalmology and Visual Sciences, Illinois Eye and Ear Infirmary, College of Medicine, University of Illinois at Chicago, Chicago, IL, USA
| | - Mario Montana
- Department of Ophthalmology and Visual Sciences, Illinois Eye and Ear Infirmary, College of Medicine, University of Illinois at Chicago, Chicago, IL, USA
| | - Kai Guo
- Department of Ophthalmology and Visual Sciences, Illinois Eye and Ear Infirmary, College of Medicine, University of Illinois at Chicago, Chicago, IL, USA
| | - Joseph R Sauer
- Department of Ophthalmology and Visual Sciences, Illinois Eye and Ear Infirmary, College of Medicine, University of Illinois at Chicago, Chicago, IL, USA
| | - Nicholas Curran
- Department of Ophthalmology and Visual Sciences, Illinois Eye and Ear Infirmary, College of Medicine, University of Illinois at Chicago, Chicago, IL, USA
| | - Kyu-Yeon Han
- Department of Ophthalmology and Visual Sciences, Illinois Eye and Ear Infirmary, College of Medicine, University of Illinois at Chicago, Chicago, IL, USA
| | - Charles Yu
- Department of Ophthalmology and Visual Sciences, Illinois Eye and Ear Infirmary, College of Medicine, University of Illinois at Chicago, Chicago, IL, USA
| | - Masatsugu Ema
- Department of Stem Cells and Human Disease Models, Shiga University of Medical Science, Otsu, Japan
| | - Mark I Rosenblatt
- Department of Ophthalmology and Visual Sciences, Illinois Eye and Ear Infirmary, College of Medicine, University of Illinois at Chicago, Chicago, IL, USA
| | - Jin-Hong Chang
- Department of Ophthalmology and Visual Sciences, Illinois Eye and Ear Infirmary, College of Medicine, University of Illinois at Chicago, Chicago, IL, USA.
| | - Dimitri T Azar
- Department of Ophthalmology and Visual Sciences, Illinois Eye and Ear Infirmary, College of Medicine, University of Illinois at Chicago, Chicago, IL, USA.
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16
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Yamakawa M, Doh SJ, Santosa SM, Montana M, Qin EC, Kong H, Han KY, Yu C, Rosenblatt MI, Kazlauskas A, Chang JH, Azar DT. Potential lymphangiogenesis therapies: Learning from current antiangiogenesis therapies-A review. Med Res Rev 2018. [PMID: 29528507 DOI: 10.1002/med.21496] [Citation(s) in RCA: 37] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
In recent years, lymphangiogenesis, the process of lymphatic vessel formation from existing lymph vessels, has been demonstrated to have a significant role in diverse pathologies, including cancer metastasis, organ graft rejection, and lymphedema. Our understanding of the mechanisms of lymphangiogenesis has advanced on the heels of studies demonstrating vascular endothelial growth factor C as a central pro-lymphangiogenic regulator and others identifying multiple lymphatic endothelial biomarkers. Despite these breakthroughs and a growing appreciation of the signaling events that govern the lymphangiogenic process, there are no FDA-approved drugs that target lymphangiogenesis. In this review, we reflect on the lessons available from the development of antiangiogenic therapies (26 FDA-approved drugs to date), review current lymphangiogenesis research including nanotechnology in therapeutic drug delivery and imaging, and discuss molecules in the lymphangiogenic pathway that are promising therapeutic targets.
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Affiliation(s)
- Michael Yamakawa
- Department of Ophthalmology and Visual Sciences, Illinois Eye and Ear Infirmary, College of Medicine, University of Illinois at Chicago, Chicago, IL
| | - Susan J Doh
- Department of Ophthalmology and Visual Sciences, Illinois Eye and Ear Infirmary, College of Medicine, University of Illinois at Chicago, Chicago, IL
| | - Samuel M Santosa
- Department of Ophthalmology and Visual Sciences, Illinois Eye and Ear Infirmary, College of Medicine, University of Illinois at Chicago, Chicago, IL
| | - Mario Montana
- Department of Ophthalmology and Visual Sciences, Illinois Eye and Ear Infirmary, College of Medicine, University of Illinois at Chicago, Chicago, IL
| | - Ellen C Qin
- Department of Materials Science and Engineering, University of Illinois at Urbana-Champaign, Urbana, IL
| | - Hyunjoon Kong
- Department of Chemical and Biomolecular Engineering, University of Illinois at Urbana-Champaign, Urbana, IL
| | - Kyu-Yeon Han
- Department of Ophthalmology and Visual Sciences, Illinois Eye and Ear Infirmary, College of Medicine, University of Illinois at Chicago, Chicago, IL
| | - Charles Yu
- Department of Ophthalmology and Visual Sciences, Illinois Eye and Ear Infirmary, College of Medicine, University of Illinois at Chicago, Chicago, IL
| | - Mark I Rosenblatt
- Department of Ophthalmology and Visual Sciences, Illinois Eye and Ear Infirmary, College of Medicine, University of Illinois at Chicago, Chicago, IL
| | - Andrius Kazlauskas
- Department of Ophthalmology and Visual Sciences, Illinois Eye and Ear Infirmary, College of Medicine, University of Illinois at Chicago, Chicago, IL.,Department of Physiology and Biophysics, College of Medicine, University of Illinois at Chicago, Chicago, IL
| | - Jin-Hong Chang
- Department of Ophthalmology and Visual Sciences, Illinois Eye and Ear Infirmary, College of Medicine, University of Illinois at Chicago, Chicago, IL
| | - Dimitri T Azar
- Department of Ophthalmology and Visual Sciences, Illinois Eye and Ear Infirmary, College of Medicine, University of Illinois at Chicago, Chicago, IL
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17
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Zhong W, Montana M, Santosa SM, Isjwara ID, Huang YH, Han KY, O'Neil C, Wang A, Cortina MS, de la Cruz J, Zhou Q, Rosenblatt MI, Chang JH, Azar DT. Angiogenesis and lymphangiogenesis in corneal transplantation-A review. Surv Ophthalmol 2017; 63:453-479. [PMID: 29287709 DOI: 10.1016/j.survophthal.2017.12.008] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2017] [Revised: 12/12/2017] [Accepted: 12/18/2017] [Indexed: 12/13/2022]
Abstract
Corneal transplantation has been proven effective for returning the gift of sight to those affected by corneal disorders such as opacity, injury, and infections that are a leading cause of blindness. Immune privilege plays an important role in the success of corneal transplantation procedures; however, immune rejection reactions do occur, and they, in conjunction with a shortage of corneal donor tissue, continue to pose major challenges. Corneal immune privilege is important to the success of corneal transplantation and closely related to the avascular nature of the cornea. Corneal avascularity may be disrupted by the processes of angiogenesis and lymphangiogenesis, and for this reason, these phenomena have been a focus of research in recent years. Through this research, therapies addressing certain rejection reactions related to angiogenesis have been developed and implemented. Corneal donor tissue shortages also have been addressed by the development of new materials to replace the human donor cornea. These advancements, along with other improvements in the corneal transplantation procedure, have contributed to an improved success rate for corneal transplantation. We summarize recent developments and improvements in corneal transplantation, including the current understanding of angiogenesis mechanisms, the anti-angiogenic and anti-lymphangiogenic factors identified to date, and the new materials being used. Additionally, we discuss future directions for research in corneal transplantation.
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Affiliation(s)
- Wei Zhong
- Department of Ophthalmology, China-Japan Union Hospital of Jilin University, Changchun, Jilin, P.R. China; Department of Ophthalmology and Visual Sciences, Illinois Eye and Ear Infirmary, College of Medicine, University of Illinois at Chicago, Chicago, Illinois, USA
| | - Mario Montana
- Department of Ophthalmology and Visual Sciences, Illinois Eye and Ear Infirmary, College of Medicine, University of Illinois at Chicago, Chicago, Illinois, USA
| | - Samuel M Santosa
- Department of Ophthalmology and Visual Sciences, Illinois Eye and Ear Infirmary, College of Medicine, University of Illinois at Chicago, Chicago, Illinois, USA
| | - Irene D Isjwara
- Department of Ophthalmology and Visual Sciences, Illinois Eye and Ear Infirmary, College of Medicine, University of Illinois at Chicago, Chicago, Illinois, USA
| | - Yu-Hui Huang
- Department of Ophthalmology and Visual Sciences, Illinois Eye and Ear Infirmary, College of Medicine, University of Illinois at Chicago, Chicago, Illinois, USA
| | - Kyu-Yeon Han
- Department of Ophthalmology and Visual Sciences, Illinois Eye and Ear Infirmary, College of Medicine, University of Illinois at Chicago, Chicago, Illinois, USA
| | - Christopher O'Neil
- Department of Ophthalmology and Visual Sciences, Illinois Eye and Ear Infirmary, College of Medicine, University of Illinois at Chicago, Chicago, Illinois, USA
| | - Ashley Wang
- Department of Ophthalmology and Visual Sciences, Illinois Eye and Ear Infirmary, College of Medicine, University of Illinois at Chicago, Chicago, Illinois, USA
| | - Maria Soledad Cortina
- Department of Ophthalmology and Visual Sciences, Illinois Eye and Ear Infirmary, College of Medicine, University of Illinois at Chicago, Chicago, Illinois, USA
| | - Jose de la Cruz
- Department of Ophthalmology and Visual Sciences, Illinois Eye and Ear Infirmary, College of Medicine, University of Illinois at Chicago, Chicago, Illinois, USA
| | - Qiang Zhou
- Department of Ophthalmology and Visual Sciences, Illinois Eye and Ear Infirmary, College of Medicine, University of Illinois at Chicago, Chicago, Illinois, USA
| | - Mark I Rosenblatt
- Department of Ophthalmology and Visual Sciences, Illinois Eye and Ear Infirmary, College of Medicine, University of Illinois at Chicago, Chicago, Illinois, USA
| | - Jin-Hong Chang
- Department of Ophthalmology and Visual Sciences, Illinois Eye and Ear Infirmary, College of Medicine, University of Illinois at Chicago, Chicago, Illinois, USA.
| | - Dimitri T Azar
- Department of Ophthalmology and Visual Sciences, Illinois Eye and Ear Infirmary, College of Medicine, University of Illinois at Chicago, Chicago, Illinois, USA.
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18
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Craig JP, Nelson JD, Azar DT, Belmonte C, Bron AJ, Chauhan SK, de Paiva CS, Gomes JAP, Hammitt KM, Jones L, Nichols JJ, Nichols KK, Novack GD, Stapleton FJ, Willcox MDP, Wolffsohn JS, Sullivan DA. TFOS DEWS II Report Executive Summary. Ocul Surf 2017; 15:802-812. [PMID: 28797892 DOI: 10.1016/j.jtos.2017.08.003] [Citation(s) in RCA: 420] [Impact Index Per Article: 60.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2017] [Accepted: 08/04/2017] [Indexed: 10/24/2022]
Abstract
This article presents an Executive Summary of the conclusions and recommendations of the 10-chapter TFOS DEWS II report. The entire TFOS DEWS II report was published in the July 2017 issue of The Ocular Surface. A downloadable version of the document and additional material, including videos of diagnostic and management techniques, are available on the TFOS website: www.TearFilm.org.
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Affiliation(s)
- Jennifer P Craig
- Department of Ophthalmology, New Zealand National Eye Centre, The University of Auckland, Auckland, New Zealand
| | - J Daniel Nelson
- Department of Ophthalmology, HealthPartners Medical Group and Clinics, St Paul, MN, USA; Department of Ophthalmology, University of Minnesota, Minneapolis, USA
| | - Dimitri T Azar
- University of Illinois at Chicago College of Medicine, Chicago, IL, USA
| | - Carlos Belmonte
- Instituto de Neurociencias de Alicante, University Miguel Hernandez-CSIC, Spain; Instituto Fernandez-Vega, Oviedo University, Spain
| | - Anthony J Bron
- Nuffield Department of Clinical Neurosciences, University of Oxford, Oxford, UK; Vision and Eye Research Unit, Anglia Ruskin University, Cambridge, UK
| | - Sunil K Chauhan
- Schepens Eye Research Institute, Massachusetts Eye and Ear, and Department of Ophthalmology, Harvard Medical School, Boston, MA, USA
| | - Cintia S de Paiva
- Department of Ophthalmology, Baylor College of Medicine, Houston, TX, USA
| | - José A P Gomes
- Department of Ophthalmology and Visual Sciences, Federal University of Sao Paulo/Paulista School of Medicine, Sao Paulo, Brazil
| | | | - Lyndon Jones
- Centre for Contact Lens Research, School of Optometry and Vision Science, University of Waterloo, Waterloo, Ontario, Canada
| | - Jason J Nichols
- University of Alabama at Birmingham School of Optometry, Birmingham, AL, USA
| | - Kelly K Nichols
- University of Alabama at Birmingham School of Optometry, Birmingham, AL, USA
| | - Gary D Novack
- Pharma Logic Development, San Rafael, CA, USA; Departments of Pharmacology and Ophthalmology, University of California, Davis, School of Medicine, USA
| | - Fiona J Stapleton
- School of Optometry and Vision Science, University of New South Wales, Sydney, New South Wales, Australia
| | - Mark D P Willcox
- School of Optometry and Vision Science, University of New South Wales, Sydney, New South Wales, Australia
| | - James S Wolffsohn
- School of Life and Health Sciences, Aston University, Birmingham, UK
| | - David A Sullivan
- Schepens Eye Research Institute, Massachusetts Eye and Ear, and Department of Ophthalmology, Harvard Medical School, Boston, MA, USA.
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19
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Nelson JD, Craig JP, Akpek EK, Azar DT, Belmonte C, Bron AJ, Clayton JA, Dogru M, Dua HS, Foulks GN, Gomes JAP, Hammitt KM, Holopainen J, Jones L, Joo CK, Liu Z, Nichols JJ, Nichols KK, Novack GD, Sangwan V, Stapleton F, Tomlinson A, Tsubota K, Willcox MDP, Wolffsohn JS, Sullivan DA. TFOS DEWS II Introduction. Ocul Surf 2017; 15:269-275. [PMID: 28736334 DOI: 10.1016/j.jtos.2017.05.005] [Citation(s) in RCA: 147] [Impact Index Per Article: 21.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2017] [Accepted: 05/03/2017] [Indexed: 11/30/2022]
Affiliation(s)
- J Daniel Nelson
- Department of Ophthalmology, HealthPartners Medical Group and Clinics, St Paul, MN, USA; University of Minnesota, Minneapolis, USA.
| | - Jennifer P Craig
- Department of Ophthalmology, New Zealand National Eye Centre, The University of Auckland, Auckland, New Zealand
| | - Esen K Akpek
- Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - Dimitri T Azar
- University of Illinois at Chicago College of Medicine, Chicago, IL, USA
| | - Carlos Belmonte
- Instituto de Neurociencias de Alicante, University Miguel Hernandez-CSIC, Spain; Instituto Fernandez-Vega, Oviedo University, Spain
| | - Anthony J Bron
- Nuffield Department of Clinical Neurosciences, University of Oxford, Oxford, UK; Vision and Eye Research Unit, Anglia Ruskin University, Cambridge, UK
| | - Janine A Clayton
- Office of Research on Women's Health, National Institutes of Health, Bethesda, MD, USA
| | - Murat Dogru
- Keio University School of Medicine, Tokyo, Japan; Tokyo Dental College, Ichikawa General Hospital, Chiba, Japan
| | - Harminder S Dua
- Academic Section of Ophthalmology, Division of Clinical Neuroscience, University of Nottingham, Nottingham, UK
| | - Gary N Foulks
- Department of Ophthalmology, University of Louisville School of Medicine, KY, USA
| | - José A P Gomes
- Department of Ophthalmology and Visual Sciences, Federal University of São Paulo/Paulista School of Medicine, São Paulo, Brazil
| | | | - Juha Holopainen
- Helsinki Eye Lab and Department of Ophthalmology, University of Helsinki and Helsinki University Hospital, Helsinki, Finland
| | - Lyndon Jones
- Centre for Contact Lens Research, School of Optometry and Vision Science, University of Waterloo, Waterloo, Ontario, Canada
| | - Choun-Ki Joo
- Catholic Institute for Visual Science, College of Medicine, The Catholic University of Korea, Seoul, South Korea
| | - Zuguo Liu
- Eye Institute and Affiliated Eye Center of Xiamen University and Eye Center of the Second Xiangya Hospital, Central South University, Xiamen, China
| | - Jason J Nichols
- University of Alabama at Birmingham School of Optometry, Birmingham, AL, USA
| | - Kelly K Nichols
- University of Alabama at Birmingham School of Optometry, Birmingham, AL, USA
| | - Gary D Novack
- Pharma Logic Development, San Rafael, CA, USA; Departments of Pharmacology and Ophthalmology, University of California, Davis, School of Medicine, USA
| | - Virender Sangwan
- Cornea Department, Center for Ocular Regeneration, Srujana-Center for Innovation and L V Prasad Eye Institute, Hyderabad, India
| | - Fiona Stapleton
- School of Optometry and Vision Science, University of New South Wales, Sydney, New South Wales, Australia
| | - Alan Tomlinson
- Vision Sciences, Glasgow Caledonian University, Glasgow, Scotland, UK
| | - Kazuo Tsubota
- Department of Ophthalmology, Keio University School of Medicine, Tokyo, Japan
| | - Mark D P Willcox
- School of Optometry and Vision Science, University of New South Wales, Sydney, New South Wales, Australia
| | - James S Wolffsohn
- School of Life and Health Sciences, Aston University, Birmingham, UK
| | - David A Sullivan
- Schepens Eye Research Institute, Massachusetts Eye and Ear, and Department of Ophthalmology, Harvard Medical School, Boston, MA, USA
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Gomes JAP, Azar DT, Baudouin C, Efron N, Hirayama M, Horwath-Winter J, Kim T, Mehta JS, Messmer EM, Pepose JS, Sangwan VS, Weiner AL, Wilson SE, Wolffsohn JS. TFOS DEWS II iatrogenic report. Ocul Surf 2017; 15:511-538. [PMID: 28736341 DOI: 10.1016/j.jtos.2017.05.004] [Citation(s) in RCA: 241] [Impact Index Per Article: 34.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2017] [Accepted: 05/02/2017] [Indexed: 01/04/2023]
Abstract
Dry eye can be caused by a variety of iatrogenic interventions. The increasing number of patients looking for eye care or cosmetic procedures involving the eyes, together with a better understanding of the pathophysiological mechanisms of dry eye disease (DED), have led to the need for a specific report about iatrogenic dry eye within the TFOS DEWS II. Topical medications can cause DED due to their allergic, toxic and immuno-inflammatory effects on the ocular surface. Preservatives, such as benzalkonium chloride, may further aggravate DED. A variety of systemic drugs can also induce DED secondary to multiple mechanisms. Moreover, the use of contact lens induces or is associated with DED. However, one of the most emblematic situations is DED caused by surgical procedures such as corneal refractive surgery as in laser-assisted in situ keratomileusis (LASIK) and keratoplasty due to mechanisms intrinsic to the procedure (i.e. corneal nerve cutting) or even by the use of postoperative topical drugs. Cataract surgery, lid surgeries, botulinum toxin application and cosmetic procedures are also considered risk factors to iatrogenic DED, which can cause patient dissatisfaction, visual disturbance and poor surgical outcomes. This report also presents future directions to address iatrogenic DED, including the need for more in-depth epidemiological studies about the risk factors, development of less toxic medications and preservatives, as well as new techniques for less invasive eye surgeries. Novel research into detection of early dry eye prior to surgeries, efforts to establish appropriate therapeutics and a greater attempt to regulate and oversee medications, preservatives and procedures should be considered.
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Affiliation(s)
- José Alvaro P Gomes
- Dept. of Ophthalmology and Visual Sciences, Federal University of Sao Paulo/Paulista School of Medicine (UNIFESP/EPM), São Paulo, SP, Brazil.
| | - Dimitri T Azar
- University of Illinois College of Medicine, Chicago, IL, USA
| | | | - Nathan Efron
- School of Optometry and Vision Science, Queensland University of Technology, Queensland, Australia
| | - Masatoshi Hirayama
- Department of Ophthalmology, School of Medicine, Keio University, Tokyo, Japan
| | | | - Terry Kim
- Duke University School of Medicine, Durham, NC, USA; Duke University Eye Center, Durham, NC, USA
| | | | - Elisabeth M Messmer
- Department of Ophthalmology, Ludwig-Maximilians-University (LMU), Munich, Germany
| | - Jay S Pepose
- Washington University School of Medicine, St. Louis, MO, USA
| | | | | | - Steven E Wilson
- Cole Eye Institute, The Cleveland Clinic, Cleveland, OH, USA
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21
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Abstract
PURPOSE OF REVIEW To identify and evaluate the risk factors of iatrogenic ectasia after refractive surgery. RECENT FINDINGS We reviewed recently published papers that identified various risk factors associated with ectasia after LASIK, photorefractive keratectomy, small incision lenticule extraction, and other refractive surgical procedures. We also attempted to evaluate the relative contributions of these factors to the development of ectasia following refractive surgery. Forme fruste keratoconus, genetic predisposition to keratoconus, low residual stromal bed thickness (through high myopia, thin preoperative cornea, or thick LASIK flap), and irregular corneal topography have been identified as risk factors for keratectasia development after refractive surgical procedures. A newly proposed metric, percentage tissue altered, has been reported to be a robust indicator for post LASIK ectasia risk calculation. Several cases of keratectasia have also been reported 6 to 12 months following minimally invasive small incision lenticule extraction procedure. Other risk factors associated with iatrogenic ectasia include eye rubbing, young age, and pregnancy. SUMMARY Ectasia after refractive surgery is a relatively rare complication which can lead to sight-threatening complications if not detected and treated in time. It is important to continue our quest to improve our methods of identifying absolute and relative risk factors of ectasia and their cut-off values following various keratorefractive surgical procedures.
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Affiliation(s)
- Pushpanjali Giri
- Department of Ophthalmology and Visual Sciences, Illinois Eye and Ear Infirmary, College of Medicine, University of Illinois at Chicago, Chicago, Illinois, USA
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22
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Han KY, Chang JH, Lee H, Azar DT. Proangiogenic Interactions of Vascular Endothelial MMP14 With VEGF Receptor 1 in VEGFA-Mediated Corneal Angiogenesis. Invest Ophthalmol Vis Sci 2017; 57:3313-22. [PMID: 27327585 PMCID: PMC5993529 DOI: 10.1167/iovs.16-19420] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022] Open
Abstract
Purpose Matrix metalloproteinase 14 (MMP14) has been shown to be required for corneal angiogenesis. We hypothesized that the proangiogenic activity of MMP14 may be based on its selective binding to, and cleaving of, vascular endothelial growth factor receptor 1 (VEGFR1), but not VEGFR2 or VEGFR3. Methods Recombinant human (rh)VEGFR1, R2, and R3 were incubated with human MMP14, and the reaction mixtures were analyzed by SDS-PAGE and Coomassie blue staining. Surface plasmon resonance was used to determine the equilibrium constants (KD) for binding between MMP14 and VEGFA versus rhVEGFR1, R2, and R3. Extracellular signal-regulated kinase (ERK) phosphorylation was assayed in vascular endothelial cells after incubation with VEGF and various concentrations of MMP14. Ex vivo aortic ring tube formation assays and VEGFA micropocket corneal neovascularization assays were performed using Flk1Cre/Flk1mCherry/MMP14lox and Flk1mCherry/MMP14lox control mice. Results Maxtrix metalloproteinase 14 increased VEGFA-induced ERK phosphorylation in a time- and concentration-dependent manner in vascular endothelial cells. Aortic ring assays showed diminished vessel sprouting in vitro in response to VEGFA, but not to basic fibroblast growth factor, in mice with conditional deletion of vascular MMP14 (Flk1creMMP14lox) compared with that in MMP14lox control mice. In addition, diminished VEGFA-induced corneal angiogenesis was seen in flk1creMMP14lox mice compared with MMP14lox mice in vivo. Conclusions Our findings indicate that VEGFR1 interaction with MMP14 and the enzymatic activity of MMP14 are necessary for VEGFA-induced angiogenesis. Additionally, selective cleavage of VEGFR1 by MMP14 may play an important role in VEGFA-induced corneal angiogenesis.
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Affiliation(s)
- Kyu-Yeon Han
- Department of Ophthalmology and Visual Sciences Illinois Eye and Ear Infirmary, College of Medicine, University of Illinois at Chicago, Chicago, Illinois, United States
| | - Jin-Hong Chang
- Department of Ophthalmology and Visual Sciences Illinois Eye and Ear Infirmary, College of Medicine, University of Illinois at Chicago, Chicago, Illinois, United States
| | - Hyun Lee
- Center for Pharmaceutical Biotechnology and Department of Medicinal Chemistry and Pharmacognosy, University of Illinois at Chicago, Chicago, Illinois, United States
| | - Dimitri T Azar
- Department of Ophthalmology and Visual Sciences Illinois Eye and Ear Infirmary, College of Medicine, University of Illinois at Chicago, Chicago, Illinois, United States
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23
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Han KY, Chang JH, Azar DT. MMP14 Regulates VEGFR3 Expression on Corneal Epithelial Cells. Protein Pept Lett 2017; 23:1095-1102. [PMID: 27781955 DOI: 10.2174/0929866523666161024142824] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2016] [Revised: 10/16/2016] [Accepted: 10/16/2016] [Indexed: 11/22/2022]
Abstract
Vascular endothelial growth factor receptor 3 (VEGFR3) regulates the growth and differentiation of blood and lymphatic vessels. To determine whether matrix metalloproteinase 14 (MMP14) modulates VEGFR3 expression in the corneal epithelium to influence the avascularity of the cornea, VEGFR3 expression was compared between wild-type and MMP14-deficient (MMP14 Δexon4) corneal epithelial cells. Western blot analysis showed that VEGFR3 protein expression was higher on MMP14 Δexon4 corneal epithelial cells than on wild-type cells, and quantitative RT-PCR analysis showed that VEGFR3 gene expression was highly induced in MMP14 Δexon4 corneal epithelial cells but not in wild-type corneal epithelial cells or wild-type and MMP14 Δexon4 corneal keratocytes. Unlike in epithelial cells, MMP14 Δexon4 keratocytes did not express relatively higher levels of VEGFR3 than wild-type keratocytes. Interestingly, in vitro proteolysis experiments showed that MMP14 does not cleave VEGFR3 in vitro as it does VEGFR1, indicating that other genes may be involved in the modulation of VEGFR3 expression by MMP14. Using proteomic analysis to identify candidate factors, we found that 39 nuclear proteins were differentially expressed between wildtype and MMP14 Δexon4 corneal epithelial cells. These findings suggest that MMP14 may regulate VEGFR3 expression at the transcriptional level on corneal epithelial cells but not on corneal keratocytes.
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Affiliation(s)
| | - Jin-Hong Chang
- Department of Ophthalmology and Visual Sciences, College of Medicine, University of Illinois at Chicago, Chicago, IL 60612.
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24
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Han KY, Tran JA, Chang JH, Azar DT, Zieske JD. Potential role of corneal epithelial cell-derived exosomes in corneal wound healing and neovascularization. Sci Rep 2017; 7:40548. [PMID: 28165027 PMCID: PMC5292698 DOI: 10.1038/srep40548] [Citation(s) in RCA: 62] [Impact Index Per Article: 8.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2016] [Accepted: 12/07/2016] [Indexed: 11/09/2022] Open
Abstract
Specific factors from the corneal epithelium underlying the stimulation of stromal fibrosis and myofibroblast formation in corneal wound healing have not been fully elucidated. Given that exosomes are known to transfer bioactive molecules among cells and play crucial roles in wound healing, angiogenesis, and cancer, we hypothesized that corneal epithelial cell-derived exosomes may gain access to the underlying stromal fibroblasts upon disruption of the epithelial basement membrane and that they induce signaling events essential for corneal wound healing. In the present study, exosome-like vesicles were observed between corneal epithelial cells and the stroma during wound healing after corneal epithelial debridement. These vesicles were also found in the stroma following anterior stromal keratectomy, in which surgical removal of the epithelium, basement membrane, and anterior stroma was performed. Exosomes secreted by mouse corneal epithelial cells were found to fuse to keratocytes in vitro and to induce myofibroblast transformation. In addition, epithelial cell-derived exosomes induced endothelial cell proliferation and ex vivo aortic ring sprouting. Our results indicate that epithelial cell-derived exosomes mediate communication between corneal epithelial cells and corneal keratocytes as well as vascular endothelial cells. These findings demonstrate that epithelial-derived exosomes may be involved in corneal wound healing and neovascularization, and thus, may serve as targets for potential therapeutic interventions.
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Affiliation(s)
- Kyu-Yeon Han
- Department of Ophthalmology and Visual Sciences, Illinois Eye and Ear Infirmary, College of Medicine, University of Illinois at Chicago, Chicago, IL, United States
| | - Jennifer A Tran
- Schepens Eye Research Institute/MEE, Boston, Massachusetts, United States
| | - Jin-Hong Chang
- Department of Ophthalmology and Visual Sciences, Illinois Eye and Ear Infirmary, College of Medicine, University of Illinois at Chicago, Chicago, IL, United States
| | - Dimitri T Azar
- Department of Ophthalmology and Visual Sciences, Illinois Eye and Ear Infirmary, College of Medicine, University of Illinois at Chicago, Chicago, IL, United States
| | - James D Zieske
- Schepens Eye Research Institute/MEE, Boston, Massachusetts, United States.,Ophthalmology, Harvard Medical School, Boston, Massachusetts, United States
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Chang JH, Putra I, Huang YH, Chang M, Han K, Zhong W, Gao X, Wang S, Dugas-Ford J, Nguyen T, Hong YK, Azar DT. Limited versus total epithelial debridement ocular surface injury: Live fluorescence imaging of hemangiogenesis and lymphangiogenesis in Prox1-GFP/Flk1::Myr-mCherry mice. Biochim Biophys Acta Gen Subj 2016; 1860:2148-56. [PMID: 27233452 DOI: 10.1016/j.bbagen.2016.05.027] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2016] [Revised: 05/04/2016] [Accepted: 05/20/2016] [Indexed: 12/14/2022]
Abstract
BACKGROUND Immunohistochemical staining experiments have shown that both hemangiogenesis and lymphangiogenesis occur following severe corneal and conjunctival injury and that the neovascularization of the cornea often has severe visual consequences. To better understand how hemangiogenesis and lymphangiogenesis are induced by different degrees of ocular injury, we investigated patterns of injury-induced corneal neovascularization in live Prox1-GFP/Flk1::myr-mCherry mice, in which blood and lymphatic vessels can be imaged simultaneously in vivo. METHODS The eyes of Prox1-GFP/Flk1::myr-mCherry mice were injured according to four models based on epithelial debridement of the: A) central cornea (a 1.5-mm-diameter circle of tissue over the corneal apex), B) total cornea, C) bulbar conjunctiva, and D) cornea+bulbar conjunctiva. Corneal blood and lymphatic vessels were imaged on days 0, 3, 7, and 10 post-injury, and the percentages of the cornea containing blood and lymphatic vessels were calculated. RESULTS Neither central corneal nor bulbar conjunctival debridement resulted in significant vessel growth in the mouse cornea, whereas total corneal and corneal+bulbar conjunctival debridement did. On day 10 in the central cornea, total cornea, bulbar conjunctiva, and corneal+bulbar conjunctival epithelial debridement models, the percentage of the corneal surface that was occupied by blood vessels (hemangiogenesis) was 1.9±0.8%, 7.14±2.4%, 2.29±1%, and 15.05±2.14%, respectively, and the percentage of the corneal surface that was occupied by lymphatic vessels (lymphangiogenesis) was 2.45±1.51%, 4.85±0.95%, 2.95±1.27%, and 4.15±3.85%, respectively. CONCLUSIONS Substantial corneal debridement was required to induce corneal neovascularization in the mouse cornea, and the corneal epithelium may therefore be partially responsible for maintaining corneal avascularity. GENERAL SIGNIFICANCE Our study demonstrates that GFP/Flk1::myr-mCherry mice are a useful model for studying coordinated hemangiogenic and lymphangiogenic responses.
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Affiliation(s)
- Jin-Hong Chang
- Department of Ophthalmology and Visual Sciences, Illinois Eye and Ear Infirmary, College of Medicine, University of Illinois at Chicago, Chicago, IL, USA.
| | - Ilham Putra
- Department of Ophthalmology and Visual Sciences, Illinois Eye and Ear Infirmary, College of Medicine, University of Illinois at Chicago, Chicago, IL, USA
| | - Yu-Hui Huang
- Department of Ophthalmology and Visual Sciences, Illinois Eye and Ear Infirmary, College of Medicine, University of Illinois at Chicago, Chicago, IL, USA
| | - Michael Chang
- Department of Ophthalmology and Visual Sciences, Illinois Eye and Ear Infirmary, College of Medicine, University of Illinois at Chicago, Chicago, IL, USA
| | - Kyuyeon Han
- Department of Ophthalmology and Visual Sciences, Illinois Eye and Ear Infirmary, College of Medicine, University of Illinois at Chicago, Chicago, IL, USA
| | - Wei Zhong
- Department of Ophthalmology and Visual Sciences, Illinois Eye and Ear Infirmary, College of Medicine, University of Illinois at Chicago, Chicago, IL, USA
| | - Xinbo Gao
- Department of Ophthalmology and Visual Sciences, Illinois Eye and Ear Infirmary, College of Medicine, University of Illinois at Chicago, Chicago, IL, USA
| | - Shuangyong Wang
- Department of Ophthalmology and Visual Sciences, Illinois Eye and Ear Infirmary, College of Medicine, University of Illinois at Chicago, Chicago, IL, USA
| | - Jennifer Dugas-Ford
- Department of Ophthalmology and Visual Sciences, Illinois Eye and Ear Infirmary, College of Medicine, University of Illinois at Chicago, Chicago, IL, USA
| | - Tara Nguyen
- Department of Ophthalmology and Visual Sciences, Illinois Eye and Ear Infirmary, College of Medicine, University of Illinois at Chicago, Chicago, IL, USA
| | - Young-Kwon Hong
- Department of Surgery, Norris Comprehensive Cancer Center, Keck School of Medicine, University of Southern California, Los Angeles, CA, USA
| | - Dimitri T Azar
- Department of Ophthalmology and Visual Sciences, Illinois Eye and Ear Infirmary, College of Medicine, University of Illinois at Chicago, Chicago, IL, USA.
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26
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Yang JF, Walia A, Huang YH, Han KY, Rosenblatt MI, Azar DT, Chang JH. Understanding lymphangiogenesis in knockout models, the cornea, and ocular diseases for the development of therapeutic interventions. Surv Ophthalmol 2015; 61:272-96. [PMID: 26706194 DOI: 10.1016/j.survophthal.2015.12.004] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2015] [Revised: 12/08/2015] [Accepted: 12/09/2015] [Indexed: 01/05/2023]
Abstract
A major focus of cancer research for several decades has been understand the ability of tumors to induce new blood vessel formation, a process known as angiogenesis. Unfortunately, only limited success has been achieved in the clinical application of angiogenesis inhibitors. We now know that lymphangiogenesis, the growth of lymphatic vessels, likely also plays a major role in tumor progression. Thus, therapeutic strategies targeting lymphangiogenesis or both lymphangiogenesis and angiogenesis may represent promising approaches for treating cancer and other diseases. Importantly, research progress toward understanding lymphangiogenesis is significantly behind that related to angiogenesis. A PubMed search of "angiogenesis" returns nearly 80,000 articles, whereas a search of "lymphangiogenesis" returns 2,635 articles. This stark contrast can be explained by the lack of molecular markers for identifying the invisible lymphatic vasculature that persisted until less than 2 decades ago, combined with the intensity of research interest in angiogenesis during the past half century. Still, significant strides have been made in developing strategies to modulate lymphangiogenesis, largely using ocular disease models. Here we review the current knowledge of lymphangiogenesis in the context of knockout models, ocular diseases, the biology of activators and inhibitors, and the potential for therapeutic interventions targeting this process.
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Affiliation(s)
- Jessica F Yang
- Department of Ophthalmology and Visual Sciences, Illinois Eye and Ear Infirmary, University of Illinois at Chicago, Chicago, Illinois, USA
| | - Amit Walia
- Department of Ophthalmology and Visual Sciences, Illinois Eye and Ear Infirmary, University of Illinois at Chicago, Chicago, Illinois, USA
| | - Yu-hui Huang
- Department of Ophthalmology and Visual Sciences, Illinois Eye and Ear Infirmary, University of Illinois at Chicago, Chicago, Illinois, USA
| | - Kyu-yeon Han
- Department of Ophthalmology and Visual Sciences, Illinois Eye and Ear Infirmary, University of Illinois at Chicago, Chicago, Illinois, USA
| | - Mark I Rosenblatt
- Department of Ophthalmology and Visual Sciences, Illinois Eye and Ear Infirmary, University of Illinois at Chicago, Chicago, Illinois, USA
| | - Dimitri T Azar
- Department of Ophthalmology and Visual Sciences, Illinois Eye and Ear Infirmary, University of Illinois at Chicago, Chicago, Illinois, USA
| | - Jin-Hong Chang
- Department of Ophthalmology and Visual Sciences, Illinois Eye and Ear Infirmary, University of Illinois at Chicago, Chicago, Illinois, USA.
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27
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Chang JH, Huang YH, Cunningham CM, Han KY, Chang M, Seiki M, Zhou Z, Azar DT. Matrix metalloproteinase 14 modulates signal transduction and angiogenesis in the cornea. Surv Ophthalmol 2015; 61:478-97. [PMID: 26647161 DOI: 10.1016/j.survophthal.2015.11.006] [Citation(s) in RCA: 42] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2015] [Revised: 11/12/2015] [Accepted: 11/23/2015] [Indexed: 11/16/2022]
Abstract
The cornea is transparent and avascular, and retention of these characteristics is critical to maintaining vision clarity. Under normal conditions, wound healing in response to corneal injury occurs without the formation of new blood vessels; however, neovascularization may be induced during corneal wound healing when the balance between proangiogenic and antiangiogenic mediators is disrupted to favor angiogenesis. Matrix metalloproteinases (MMPs), which are key factors in extracellular matrix remodeling and angiogenesis, contribute to the maintenance of this balance, and in pathologic instances, can contribute to its disruption. Here, we elaborate on the facilitative role of MMPs, specifically MMP-14, in corneal neovascularization. MMP-14 is a transmembrane MMP that is critically involved in extracellular matrix proteolysis, exosome transport, and cellular migration and invasion, processes that are critical for angiogenesis. To aid in developing efficacious therapies that promote healing without neovascularization, it is important to understand and further investigate the complex pathways related to MMP-14 signaling, which can also involve vascular endothelial growth factor, basic fibroblast growth factor, Wnt/β-catenin, transforming growth factor, platelet-derived growth factor, hepatocyte growth factor or chemokines, epidermal growth factor, prostaglandin E2, thrombin, integrins, Notch, Toll-like receptors, PI3k/Akt, Src, RhoA/RhoA kinase, and extracellular signal-related kinase. The involvement and potential contribution of these signaling molecules or proteins in neovascularization are the focus of the present review.
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Affiliation(s)
- Jin-Hong Chang
- Department of Ophthalmology and Visual Sciences, Illinois Eye and Ear Infirmary, University of Illinois at Chicago, Chicago, Illinois, USA
| | - Yu-Hui Huang
- Department of Ophthalmology and Visual Sciences, Illinois Eye and Ear Infirmary, University of Illinois at Chicago, Chicago, Illinois, USA
| | - Christy M Cunningham
- Department of Ophthalmology and Visual Sciences, Illinois Eye and Ear Infirmary, University of Illinois at Chicago, Chicago, Illinois, USA
| | - Kyu-Yeon Han
- Department of Ophthalmology and Visual Sciences, Illinois Eye and Ear Infirmary, University of Illinois at Chicago, Chicago, Illinois, USA
| | - Michael Chang
- Department of Ophthalmology and Visual Sciences, Illinois Eye and Ear Infirmary, University of Illinois at Chicago, Chicago, Illinois, USA
| | - Motoharu Seiki
- Institute of Medical Science, University of Tokyo, Tokyo, Japan
| | - Zhongjun Zhou
- Department of Biochemistry, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Hong Kong, China
| | - Dimitri T Azar
- Department of Ophthalmology and Visual Sciences, Illinois Eye and Ear Infirmary, University of Illinois at Chicago, Chicago, Illinois, USA.
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28
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Walia A, Yang JF, Huang YH, Rosenblatt MI, Chang JH, Azar DT. Endostatin's emerging roles in angiogenesis, lymphangiogenesis, disease, and clinical applications. Biochim Biophys Acta 2015; 1850:2422-38. [PMID: 26367079 PMCID: PMC4624607 DOI: 10.1016/j.bbagen.2015.09.007] [Citation(s) in RCA: 126] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/17/2015] [Revised: 09/02/2015] [Accepted: 09/10/2015] [Indexed: 02/08/2023]
Abstract
BACKGROUND Angiogenesis is the process of neovascularization from pre-existing vasculature and is involved in various physiological and pathological processes. Inhibitors of angiogenesis, administered either as individual drugs or in combination with other chemotherapy, have been shown to benefit patients with various cancers. Endostatin, a 20-kDa C-terminal fragment of type XVIII collagen, is one of the most potent inhibitors of angiogenesis. SCOPE OF REVIEW We discuss the biology behind endostatin in the context of its endogenous production, the various receptors to which it binds, and the mechanisms by which it acts. We focus on its inhibitory role in angiogenesis, lymphangiogenesis, and cancer metastasis. We also present emerging clinical applications for endostatin and its potential as a therapeutic agent in the form a short peptide. MAJOR CONCLUSIONS The delicate balance between pro- and anti-angiogenic factors can be modulated to result in physiological wound healing or pathological tumor metastasis. Research in the last decade has emphasized an emerging clinical potential for endostatin as a biomarker and as a therapeutic short peptide. Moreover, elevated or depressed endostatin levels in diseased states may help explain the pathophysiological mechanisms of the particular disease. GENERAL SIGNIFICANCE Endostatin was once sought after as the 'be all and end all' for cancer treatment; however, research throughout the last decade has made it apparent that endostatin's effects are complex and involve multiple mechanisms. A better understanding of newly discovered mechanisms and clinical applications still has the potential to lead to future advances in the use of endostatin in the clinic.
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Affiliation(s)
- Amit Walia
- Department of Ophthalmology and Visual Sciences, Illinois Eye and Ear Infirmary, University of Illinois at Chicago, Chicago, IL, USA
| | - Jessica F Yang
- Department of Ophthalmology and Visual Sciences, Illinois Eye and Ear Infirmary, University of Illinois at Chicago, Chicago, IL, USA
| | - Yu-Hui Huang
- Department of Ophthalmology and Visual Sciences, Illinois Eye and Ear Infirmary, University of Illinois at Chicago, Chicago, IL, USA
| | - Mark I Rosenblatt
- Department of Ophthalmology and Visual Sciences, Illinois Eye and Ear Infirmary, University of Illinois at Chicago, Chicago, IL, USA
| | - Jin-Hong Chang
- Department of Ophthalmology and Visual Sciences, Illinois Eye and Ear Infirmary, University of Illinois at Chicago, Chicago, IL, USA.
| | - Dimitri T Azar
- Department of Ophthalmology and Visual Sciences, Illinois Eye and Ear Infirmary, University of Illinois at Chicago, Chicago, IL, USA
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29
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Han KY, Dugas-Ford J, Lee H, Chang JH, Azar DT. MMP14 Cleavage of VEGFR1 in the Cornea Leads to a VEGF-Trap Antiangiogenic Effect. Invest Ophthalmol Vis Sci 2015; 56:5450-6. [PMID: 26284550 DOI: 10.1167/iovs.14-16248] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
Abstract
PURPOSE To determine the possible antiangiogenic effect of metalloproteinase (MMP) 14 cleavage of vascular endothelial growth factor receptor 1 (VEGFR1) in the cornea. METHODS Recombinant mouse (rm) VEGFR1 was incubated with various concentrations of recombinant MMP14 to examine proteolysis in vitro. The reaction mixture was analyzed by SDS-PAGE and stained with Coomassie blue. The fragments resulting from rmVEGFR1 cleavage by MMP14 were subjected to Edman degradation, and the amino acid sequences were aligned with rmVEGFR1 sequences. Surface plasmon resonance was used to determine the equilibrium dissociation constant (KD) between MMP14 and rmVEGFR1. The KD value of rmVEGFR1 and the 59.8-kDa cleavage product binding to VEGF-A₁₆₅ was also determined. Cell proliferation assays were performed in the presence of VEGF-A₁₆₅ plus the 59.8-kDa VEGFR1 fragment or VEGF-A₁₆₅ alone. RESULTS Matrix metalloproteinase 14 binds and cleaves rmVEGFR1 to produce 59.8-kDa (N-terminal fragment, Ig domains 1-5), 35-kDa (C-terminal fragment containing IgG and His-tag), and 21-kDa (Ig domains 6-7) fragments. The 59.8-kDa fragment showed binding to VEGF-A₁₆₅ and inhibited VEGF-induced endothelial cell mitogenesis. CONCLUSIONS Our findings suggest that VEGFR1 cleavage by MMP14 in the cornea leads to a VEGF-trap effect, reducing the proangiogenic effect of VEGF-A₁₆₅, thereby reducing corneal angiogenesis.
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Affiliation(s)
- Kyu-Yeon Han
- Department of Ophthalmology and Visual Sciences Illinois Eye and Ear Infirmary, University of Illinois at Chicago, Chicago, Illinois, United States
| | - Jennifer Dugas-Ford
- Department of Ophthalmology and Visual Sciences Illinois Eye and Ear Infirmary, University of Illinois at Chicago, Chicago, Illinois, United States
| | - Hyun Lee
- Center for Pharmaceutical Biotechnology and Department of Medicinal Chemistry and Pharmacognosy, University of Illinois at Chicago, Chicago, Illinois, United States
| | - Jin-Hong Chang
- Department of Ophthalmology and Visual Sciences Illinois Eye and Ear Infirmary, University of Illinois at Chicago, Chicago, Illinois, United States
| | - Dimitri T Azar
- Department of Ophthalmology and Visual Sciences Illinois Eye and Ear Infirmary, University of Illinois at Chicago, Chicago, Illinois, United States
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Zhu J, Dugas-Ford J, Chang M, Purta P, Han KY, Hong YK, Dickinson ME, Rosenblatt MI, Chang JH, Azar DT. Simultaneous in vivo imaging of blood and lymphatic vessel growth in Prox1-GFP/Flk1::myr-mCherry mice. FEBS J 2015; 282:1458-1467. [PMID: 25688651 PMCID: PMC4400230 DOI: 10.1111/febs.13234] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2014] [Revised: 12/13/2014] [Accepted: 02/12/2015] [Indexed: 11/26/2022]
Abstract
The ability to visually observe angiogenesis and lymphangiogenesis simultaneously and repeatedly in living animals would greatly enhance our understanding of the inter-dependence of these processes. To generate a mouse model that allows such visualization via in vivo fluorescence imaging, we crossed Prox1-GFP mice with Flk1::myr-mCherry mice to generate Prox1-GFP/Flk1::myr-mCherry mice, in which lymphatic vessels emit green fluorescence and blood vessels emit red fluorescence. Corneal neovascularization was induced in these mice using three injury models: implantation of a vascular endothelial growth factor (VEGF) pellet, implantation of a basic fibroblast growth factor (bFGF) pellet, and alkali burn injury. Vessel growth was observed in vivo by stereomicroscopy on days 0, 3, 7 and 10 after pellet implantation or alkali injury as well as in flat-mounted corneas via confocal microscopy after the final in vivo imaging time point. We observed blood and lymphatic vessel growth in all three models, with the most significant growth occurring from days 0-7. Upon VEGF stimulation, the growth kinetics of blood and lymphatic vessels were similar. Blood vessels exhibited similar growth patterns in VEGF- and bFGF-stimulated corneas. Alkali burn injury induced robust angiogenesis and lymphangiogenesis. The intrinsic fluorescence of blood and lymphatic endothelial cells in Prox1-GFP/Flk1::myr-mCherry mice permitted simultaneous in vivo imaging of angiogenesis and lymphangiogenesis. This allowed us to differentiate the processes as well as observe their inter-dependence, and will be valuable in development of therapies targeting angiogenesis and/or lymphangiogenesis.
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Affiliation(s)
- Jimmy Zhu
- Department of Ophthalmology and Visual Sciences, Illinois Eye and Ear Infirmary, University of Illinois at Chicago, Chicago, IL, USA
| | - Jennifer Dugas-Ford
- Department of Ophthalmology and Visual Sciences, Illinois Eye and Ear Infirmary, University of Illinois at Chicago, Chicago, IL, USA
| | - Michael Chang
- Department of Ophthalmology and Visual Sciences, Illinois Eye and Ear Infirmary, University of Illinois at Chicago, Chicago, IL, USA
| | - Patryk Purta
- Department of Ophthalmology and Visual Sciences, Illinois Eye and Ear Infirmary, University of Illinois at Chicago, Chicago, IL, USA
| | - Kyu-Yeon Han
- Department of Ophthalmology and Visual Sciences, Illinois Eye and Ear Infirmary, University of Illinois at Chicago, Chicago, IL, USA
| | - Young-Kwon Hong
- Department of Surgery, Norris Comprehensive Cancer Center, Keck School of Medicine, University of Southern California, Los Angeles, CA, USA
| | - Mary E. Dickinson
- Department of Molecular Physiology and Biophysics, Baylor College of Medicine, Houston, TX, USA
| | - Mark I. Rosenblatt
- Department of Ophthalmology and Visual Sciences, Illinois Eye and Ear Infirmary, University of Illinois at Chicago, Chicago, IL, USA
| | - Jin-Hong Chang
- Department of Ophthalmology and Visual Sciences, Illinois Eye and Ear Infirmary, University of Illinois at Chicago, Chicago, IL, USA
| | - Dimitri T. Azar
- Department of Ophthalmology and Visual Sciences, Illinois Eye and Ear Infirmary, University of Illinois at Chicago, Chicago, IL, USA
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Gatinel D, Azar DT, Dumas L, Malet J. Effect of anterior corneal surface asphericity modification on fourth-order zernike spherical aberrations. J Refract Surg 2014; 30:708-15. [PMID: 25291755 DOI: 10.3928/1081597x-20140903-10] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2014] [Accepted: 06/18/2014] [Indexed: 11/20/2022]
Abstract
PURPOSE To evaluate the theoretical influence of the change in corneal asphericity (ΔQ) on the change in fourth-order Zernike spherical aberration coefficient (ΔC(4)0) with customized aspheric refractive correction of myopia and hyperopia. METHODS The initial anterior corneal surface profile was modeled as a conic section of apical radius of curvature R0 and asphericity Q₀. The postoperative corneal profile was modeled as a conic section of apical curvature R1 and asphericity Q1, where R1 was computed from defocus D, and Q₁ selected for controlling the postoperative asphericity. The corresponding change in fourth-order spherical aberration (ΔC(0)4) was computed within a 6-mm optical zone using inner products applied to the incurred optical path changes. These calculations were repeated for different values of D, R₀, Q₀, and various intended ΔC(4)0 values. RESULTS Increasing negative spherical aberration (ΔC(4)(0) < 0) requires a change toward more negative values of asphericity (increased prolateness; ΔQ < 0) for hyperopic and low myopic corrections, but more positive values (ΔQ < 0) for high myopic correction. The larger the intended change in corneal spherical aberration (ΔC(4)(0)), the more myopic the threshold value for which the required change in asphericity, ΔQ, becomes positive. The influence of the magnitude of paraxial defocus correction is less pronounced when larger changes in C(4)(0) are intended. CONCLUSIONS These results provide a basis for controlling the direction (sign) and the magnitude of spherical aberration changes when using customized aspheric profiles of ablation.
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Han KY, Chang JH, Dugas-Ford J, Alexander JS, Azar DT. Involvement of lysosomal degradation in VEGF-C-induced down-regulation of VEGFR-3. FEBS Lett 2014; 588:4357-63. [PMID: 25281926 DOI: 10.1016/j.febslet.2014.09.034] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2014] [Accepted: 09/22/2014] [Indexed: 11/17/2022]
Abstract
The vascular endothelial growth factor (VEGF)-C-induced down-regulation of VEGF receptor (VEGFR)-3 is important in lymphangiogenesis. Here, we demonstrate that VEGF-C, -D, and -C156S, but not VEGF-A, down-regulate VEGFR-3. VEGF-C stimulates VEGFR-3 tyrosyl phosphorylation and transient phosphorylation of extracellular signal-regulated kinase (ERK), p38, and c-Jun N-terminal kinases in lymphatic endothelial cells. VEGF-C-induced down-regulation of VEGFR-3 was blocked by a VEGF-C trap, tyrosine kinase inhibitor, and leupeptin, pepstatin, and E64 (LPE), but was unaffected by Notch 1 activator and γ-secretase inhibitors. Our findings indicate that VEGF-C down-regulates VEGFR-3 in lymphatic endothelial cells through VEGFR-3 kinase activation and, in part, via lysosomal degradation.
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Affiliation(s)
- Kyu-Yeon Han
- Department of Ophthalmology and Visual Sciences, Illinois Eye and Ear Infirmary, University of Illinois at Chicago, Chicago, IL, United States
| | - Jin-Hong Chang
- Department of Ophthalmology and Visual Sciences, Illinois Eye and Ear Infirmary, University of Illinois at Chicago, Chicago, IL, United States.
| | - Jennifer Dugas-Ford
- Department of Ophthalmology and Visual Sciences, Illinois Eye and Ear Infirmary, University of Illinois at Chicago, Chicago, IL, United States
| | - Jonathan S Alexander
- Department of Molecular and Cellular Physiology, Louisiana State University Health Sciences Center, Shreveport, LA, United States. http://www.nature.com/nm/journal/v15/n9/abs/nm.2018.html-a8
| | - Dimitri T Azar
- Department of Ophthalmology and Visual Sciences, Illinois Eye and Ear Infirmary, University of Illinois at Chicago, Chicago, IL, United States
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Prickett AL, Bui K, Hallak J, Bakhtiyari P, de la Cruz J, Azar DT, Chamon W. Cyclotorsional and non-cyclotorsional components of eye rotation observed from sitting to supine position. Br J Ophthalmol 2014; 99:49-53. [DOI: 10.1136/bjophthalmol-2014-304975] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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Han KY, Dugas-Ford J, Seiki M, Chang JH, Azar DT. Evidence for the Involvement of MMP14 in MMP2 Processing and Recruitment in Exosomes of Corneal Fibroblasts. Invest Ophthalmol Vis Sci 2014; 56:5323-9. [PMID: 25015352 DOI: 10.1167/iovs.14-14417] [Citation(s) in RCA: 48] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
Abstract
PURPOSE Matrix metalloproteinase (MMP) 14 has been shown to promote angiogenesis, but the underlying mechanisms are poorly understood. In this study, we investigated exosomal transport of MMP14 and its target, MMP2, from corneal fibroblasts to vascular endothelial cells as a possible mechanism governing MMP14 activity in corneal angiogenesis. METHODS We isolated MMP14-containing exosomes from corneal fibroblasts by sucrose density gradient and evaluated exosome content and purity by Western blot analysis. We then investigated exosome transport in vitro from corneal fibroblasts to two populations of vascular endothelial cells, human umbilical vein endothelial cells (HUVECs) and calf pulmonary artery endothelial cells (CPAECs). Western blot analysis and gelatin zymography were used to determine levels of MMP14 and MMP2, respectively, in exosomal fractions derived from cultured wild-type, MMP14 enzymatic domain-deficient (MMP14Δexon4), and MMP14-null corneal fibroblasts. RESULTS Matrix metalloproteinase 14-containing exosomes isolated from corneal fibroblasts were readily taken up in vitro by HUVECs and CPAECs. We found that MMP14 was enriched in exosomal fractions of cultured corneal fibroblasts. Moreover, loss of the MMP14 enzymatic domain resulted in accumulation of pro-MMP2 protein in exosomes, whereas MMP2 was nearly undetectable in exosomes of MMP14-null fibroblasts. CONCLUSIONS Our results indicate that exosomes secreted by corneal fibroblasts can transport proteins, including MMP14, to vascular endothelial cells. In addition, recruitment of MMP2 into corneal fibroblast exosomes is an active process that depends, at least in part, on the presence of MMP14. The role of exosomal MMP14 transport in corneal angiogenesis has important implications for therapeutic applications targeting angiogenic processes in the cornea.
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Affiliation(s)
- Kyu-Yeon Han
- Department of Ophthalmology and Visual Sciences Illinois Eye and Ear Infirmary, University of Illinois at Chicago, Chicago, United States
| | - Jennifer Dugas-Ford
- Department of Ophthalmology and Visual Sciences Illinois Eye and Ear Infirmary, University of Illinois at Chicago, Chicago, United States
| | - Motoharu Seiki
- Division of Cancer Cell Research, Institute of Medical Science, University of Tokyo, Minato-ku, Tokyo, Japan
| | - Jin-Hong Chang
- Department of Ophthalmology and Visual Sciences Illinois Eye and Ear Infirmary, University of Illinois at Chicago, Chicago, United States
| | - Dimitri T Azar
- Department of Ophthalmology and Visual Sciences Illinois Eye and Ear Infirmary, University of Illinois at Chicago, Chicago, United States
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Moore JE, Atkinson SD, Azar DT, Worthington J, Downes CS, Courtney DG, Moore CBT. Protection of corneal epithelial stem cells prevents ultraviolet A damage during corneal collagen cross-linking treatment for keratoconus. Br J Ophthalmol 2013; 98:270-4. [DOI: 10.1136/bjophthalmol-2013-303816] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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Han KY, Fahd DC, Tshionyi M, Allemann N, Jain S, Chang JH, Azar DT. MT1-MMP modulates bFGF-induced VEGF-A expression in corneal fibroblasts. Protein Pept Lett 2013; 19:1334-9. [PMID: 22670674 DOI: 10.2174/092986612803521639] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2012] [Revised: 05/10/2012] [Accepted: 05/11/2012] [Indexed: 11/22/2022]
Abstract
The cornea is physiologically avascular. Following a corneal injury, wound healing often proceeds without neovascularization (NV); however, corneal NV may be induced during wound healing in certain inflammatory, infectious, degenerative, and traumatic states. Such states disrupt the physiologic balance between pro-angiogenic and antiangiogenic mediators, favoring angiogenesis. Contributors to such states are matrix metalloproteinases (MMPs), which are key factors in both extracellular matrix remodeling and angiogenesis. Similarly, vascular endothelial growth factor A (VEGF-A) and basic fibroblast growth factor (bFGF) exert pro-angiogenic effects. Here, we elaborate on the facilitative role of MMPs-specifically Membrane Type 1 MMP (MT1-MMP, MMP14)-in corneal NV. Additionally, we provide new insight into the signaling relating to MT1-MMP, Ras, and ERK in the bFGF-induced VEGF-A expression pathways within the corneal fibroblasts.
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Affiliation(s)
- Kyu-Yeon Han
- Department of Ophthalmology and Visual Sciences, Illinois Eye and Ear Infirmary, University of Illinois at Chicago, Chicago, IL 60612, USA
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Chang JH, Garg NK, Lunde E, Han KY, Jain S, Azar DT. Corneal neovascularization: an anti-VEGF therapy review. Surv Ophthalmol 2012; 57:415-29. [PMID: 22898649 DOI: 10.1016/j.survophthal.2012.01.007] [Citation(s) in RCA: 251] [Impact Index Per Article: 20.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2011] [Revised: 01/14/2012] [Accepted: 01/16/2012] [Indexed: 01/02/2023]
Abstract
Corneal neovascularization is a serious condition that can lead to a profound decline in vision. The abnormal vessels block light, cause corneal scarring, compromise visual acuity, and may lead to inflammation and edema. Corneal neovascularization occurs when the balance between angiogenic and antiangiogenic factors is tipped toward angiogenic molecules. Vascular endothelial growth factor (VEGF), one of the most important mediators of angiogenesis, is upregulated during neovascularization. In fact, anti-VEGF agents have efficacy in the treatment of neovascular age-related macular degeneration, diabetic retinopathy, macular edema, neovascular glaucoma, and other neovascular diseases. These same agents have great potential for the treatment of corneal neovascularization. We review some of the most promising anti-VEGF therapies, including bevacizumab, VEGF trap, siRNA, and tyrosine kinase inhibitors.
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Affiliation(s)
- Jin-Hong Chang
- Department of Ophthalmology and Visual Sciences, Illinois Eye and Ear Infirmary, University of Illinois at Chicago, Chicago 60612, USA.
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Han KY, T. Azar D, Sabri A, Lee H, Jain S, Lee BS, Chang JH. Characterization of the Interaction Between Endostatin Short Peptide and VEGF Receptor 3. Protein Pept Lett 2012; 19:969-74. [DOI: 10.2174/092986612802084465] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2011] [Revised: 03/03/2012] [Accepted: 03/15/2012] [Indexed: 11/22/2022]
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Ghanem RC, Han KY, Rojas J, Ozturk O, Kim DJ, Jain S, Chang JH, Azar DT. Semaphorin 7A promotes angiogenesis in an experimental corneal neovascularization model. Curr Eye Res 2012; 36:989-96. [PMID: 21999225 DOI: 10.3109/02713683.2011.593730] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
PURPOSE To characterize the involvement of Semaphorin 7A (Sema7a) in corneal neovascularization (NV). METHODS We generated anti-Sema7A antibodies to detect protein expression in corneal fibroblasts. Corneal fibroblast cells were cultured, stimulated with basic fibroblast growth factor (bFGF or FGF-2), immunostained with anti-Sema7A antibodies, and visualized by confocal microscopy. bFGF pellets were implanted in mouse corneal micropockets for 3-10 days, and corneal sections were immunostained with anti-Sema7A antibodies. Mouse corneas were injected with a Sema7A expression vector or a control vector for 3, 7, and 10 days. Mouse corneas were imaged by slit lamp microscopy, and areas of corneal NV were calculated using the ImageJ program. Mouse corneal sections were also immunostained with anti-macrophage marker (F4/80) and anti-vascular endothelial growth factor (VEGF)-A antibodies. RESULTS Our data showed enhanced Sema7A expression levels in bFGF-stimulated cultured corneal fibroblasts. bFGF corneal implantation also demonstrated enhanced Sema7A expression. Corneas injected with a Sema7A expression vector showed evidence of significant corneal NV compared to controls on day 10 (1.8 mm(2) vs. 0.11 mm(2); p < 0.02). Additionally, immunolocalization of Sema7A expression vector-injected corneas (at day 7) revealed macrophage recruitment and enhanced VEGF-A levels. CONCLUSIONS We demonstrated that Sema7A was expressed in vascularized corneas and showed pro-angiogenic properties in our corneal model. Understanding the mechanism of Sema7A in angiogenesis may provide a therapeutic target for the treatment of corneal angiogenesis-related disorders.
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Affiliation(s)
- Ramon C Ghanem
- Department of Ophthalmology and Visual Sciences, University of Illinois at Chicago, USA
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Abstract
The ongoing quest for a safe, simple, effective, minimally invasive, and stable refractive surgical procedure to correct refractive errors has stimulated the development of surface ablation techniques and laser in situ keratomileusis. In this review, we describe the history, patient assessment, techniques, outcomes, and complications of surface ablation (photorefractive keratectomy, laser-assisted sub-epithelial keratectomy, epithelial laser-assisted in situ keratomileusis) and compare the results of various surface techniques. Surface ablation procedures will continue to evolve, with potential improvements in outcomes accompanying future sophisticated ablation profiles and laser technology.
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Affiliation(s)
- Suphi Taneri
- Center for Refractive Surgery, St Franziskus Hospital, Münster, Germany
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Taneri S, Oehler S, Azar DT. Influence of mydriatic eye drops on wavefront sensing with the Zywave aberrometer. J Refract Surg 2011; 27:678-85. [PMID: 21446641 DOI: 10.3928/1081597x-20110317-01] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2010] [Accepted: 03/09/2011] [Indexed: 11/20/2022]
Abstract
PURPOSE To investigate a potential influence of mydriatic eye drops on wavefront sensing with the Zywave aberrometer (Technolas Perfect Vision) in terms of predicted phoropter refraction (PPR) and higher order aberrations (HOA). METHODS In this prospective study, 200 myopic eyes were measured in miosis and pharmacologically induced mydriasis with an aberrometer and automated refraction. One hundred eyes were dilated with tropicamide 0.5%+phenylephrine 2.5% eye drops (tropicamide/phenylephrine group), and the remaining 100 eyes with tropicamide 0.5% (tropicamide only group). The PPR values for a pupil diameter of 3.5 mm in miosis and mydriasis, respectively, were compared and correlated to the corresponding values of automated refraction. Changes in HOAs up to the 4th order were recorded. RESULTS Predicted phoropter refraction values obtained in mydriasis were less myopic than in miosis. The spherical equivalent refraction of PPR differed by an average of 0.36 ± 0.36 diopters (D) in the tropicamide/phenylephrine group. In the tropicamide only group, the difference was 0.24 ± 0.43 D. Sphere of PPR differed by an average of 0.33 ± 0.36 D in the tropicamide/phenylephrine group and by an average of 0.24 ± 0.35 D in the tropicamide only group. Patient age had no major influence on the level of difference. Automated refraction yielded a smaller difference in spherical equivalent refraction. Changes in HOA root-mean-square were statistically significant. CONCLUSIONS The cycloplegic effect of mydriatic eye drops should be taken into account when interpreting aberration measurements and planning a wavefront-guided ablation. Ideally, the use of mydriatic eye drops should be avoided to minimize refractive surprises.
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Affiliation(s)
- Suphi Taneri
- Zentrum fur Refraktive Chirurgie, Munster, Germany.
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Vasaiwala R, Jackson WB, Azar DT, Al-Muammar A. Excimer Laser Surface Treatment. Cornea 2011. [DOI: 10.1016/b978-0-323-06387-6.00168-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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Abbott RL, Adrean SD, Al-Muammar A, Akhtar J, Alfonso EC, Allen RC, Almond MC, Alvarenga L, Alward WLM, Ambrósio R, Anwar M, Azar DT, Ball JL, Barney NP, Bartow RM, Baum J, Belin MW, Bell JH, Benetz BA, Berbos Z, Beuerman RW, Bhasin AK, Bhat PV, Biber JM, Bidros M, Birnbaum AD, Bouchard CS, Bradley JC, Brandt JD, Brasington RD, Brilakis HS, Burkat CN, Calatayud M, Cameron JD, Campos M, Carpel EF, Cavanagh HD, Chan C, Chang RI, Chang BH, Chern KC, Ching S, Chodosh J, Choo PH, Chung G, Ciolino JB, Clayton JA, Cohen EJ, Comyn O, Cortina MS, Cowden JW, Croasdale CR, Davidson RS, Davis EA, Daya SM, Freitas DD, DeMill DL, de Oliveira LA, de Smet MD, de Sousa LB, Djalilian AR, Dohlman CH, Donnenfeld ED, Dortzbach RK, Driebe WT, Dunn SP, Eagle RC, Edelstein SL, Eiferman RA, Eliason JA, Farid M, Faulkner WJ, Feder RS, Feiz V, Feng MT, Fingert JH, Florakis GJ, Fontana L, Forster RK, Foster CS, Foster FS, Foulks GN, Friedlander MH, Fukuda M, Galor A, Gan TJ, Garg P, Garg S, Glasser DB, Goins KM, Goldstein DA, Gottlieb C, Grimmett MR, Gris O, Groos EB, Gruzensky WD, Güell JL, Gupta PK, Hamill MB, Hammersmith KM, Hamrah P, Hannush SB, Hardten DR, Harrison A, Heck EL, Heidemann DG, Herman DC, Heur JM, Hodge WG, Hoffman CJ, Holland EJ, Holland GN, Honig MA, Hood CT, Hoskins EN, Huang AJW, Huang D, Hui JI, Iuorno JD, Jackson WB, Jakobiec FA, Jeng BH, Jester JV, Jordan DR, Kaiura TL, Karp CL, Katz DG, Kaufman SC, Kersten RC, Khachikian SS, Kim JH, Kim JY, Kim SK, Kim T, Kirkness CM, Klyce SD, Koch DD, Kowalski RP, Krachmer JH, Laibson PR, Lane SS, Lass JH, Lee WB, Lee OA, Lemp MA, Lenhart PD, Li Y, Liesegang TJ, Lim MC, Lin LK, Lin MP, Lindquist TD, Lindstrom RL, Litoff D, Liu C, Lowder CY, Lubniewski AJ, McGee HT, McLean IW, Macsai MS, Manero F, Mannis MJ, Mantopoulos D, Martinez CE, Mártonyi CL, Mashor RS, Mathers WD, Mehta MN, Meisler DM, Mian SI, Miller D, Miller CA, Montoya M, Morral M, Moyes AL, Murphy ML, Nassiri N, Neff KD, Nelson JD, Nerad JA, Netto MV, Newton CJ, Nijm LM, Nishida T, Noble BA, Nordlund ML, Nussenblatt RB, O'Day DG, Ongkosuwito JV, Oxford KW, Palay DA, Palmon FE, Paranjpe DR, Parikh M, Park DH, Park DJJ, Parsons MR, Pavlin CJ, Pearlstein ES, Perry A, Petroll WM, Pfister DR, Pfister RR, Pflugfelder SC, Price FW, Price MO, Probst LE, Purcell JJ, Pyott AAE, Raizman MB, Raju LV, Randleman JB, Rao GN, Rapuano CJ, Reilly CD, de Candelaria Renesto A, Rezende RA, Robertson DM, Rootman DS, Rothman JS, Rubinfeld RS, Sadowsky AE, Saika S, Sakhalkar MV, Salz JJ, Sangwan VS, Scarpi M, Scharf BH, Schmidt G, Schmitt A, Schmitt FP, Schteingart MT, Schwab IR, Schwam BL, Schwartz GS, Sen HN, Shapiro MB, Shimmura S, Singal N, Skeens HM, Skolnick CA, Slomovic AR, Smith JA, Snyder ME, Solomon R, Soukiasian SH, Srinivasan S, Stamler JF, Steinert RF, Stoller GL, Streeten BW, Stulting RD, Sugar A, Sugar J, Tan D, Tauber J, Terry MA, Tessler HH, Torrabadella M, Traboulsi EI, Trattler WB, Tsai JH, Tse DT, Tu EY, Ursea R, Vaddavalli PK, Van Meter WS, Varley GA, Vasaiwala R, Verachtert AJ, Verdier DD, Vieira AC, Virasch VV, Wang L, Waring GO, Waring GO, Warner MA, Warrian KJ, Webster GF, Weikert MP, Weisenthal RW, Weiss JS, Wichiensin P, Wilhelmus KR, Wilson SE, Woodward MA, Yee RW, Yoo S. Contributors. Cornea 2011. [DOI: 10.1016/b978-0-323-06387-6.00005-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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Winokur J, Lee J, Kumar G, Azar DT. Surgical technique of femtosecond dovetail rotational autograft. Br J Ophthalmol 2010; 95:434-6. [PMID: 21156703 DOI: 10.1136/bjo.2010.194027] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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Yeh SI, Han KY, Sabri A, Rosenblatt MI, Azar DT, Jain S, Chang JH. MMP-7 knock-in corneal fibroblast cell lines secrete MMP-7 with proteolytic activity towards collagen XVIII. Curr Eye Res 2010; 35:799-805. [PMID: 20795861 DOI: 10.3109/02713683.2010.494239] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
PURPOSE To determine whether matrix metalloproteinase-7 (MMP-7) that is stably overexpressed by mouse corneal fibroblast cell lines exhibits proteolytic activity against the NC1 fragment of collagen XVIII. METHODS Corneal fibroblasts isolated from MMP-7 knockout (7ko) mice were subjected to SV40 T-antigen immortalization and stably transfected with a bicistronic retroviral vector encoding green fluorescence protein and active MMP-7. The resulting MMP-7 knock-in fibroblasts (7ko-MMP-7 cells) were isolated and enriched by fluorescence activated cell sorting (FACS). Culture media samples from 7ko and 7ko-MMP-7 cells were then incubated with the recombinant NC1 fragment of collagen XVIII, and NC1 degradation was monitored by immunoblotting. RESULTS Immunoblot analysis revealed that MMP-7 was present in lysates and culture media from 7ko-MMP-7 fibroblasts, but not media from immortalized 7ko fibroblasts. Importantly, lower amounts of the NC1 fragment were present in in vitro enzymatic reaction mixtures containing concentrated 7ko-MMP-7 media than in those containing concentrated 7ko media. CONCLUSION Immortalized fibroblasts stably transfected with MMP-7 secrete active MMP-7 with proteolytic activity towards the NC1 fragment of collagen XVIII.
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Affiliation(s)
- Shu-I Yeh
- Department of Ophthalmology, Massachusetts Eye and Ear Infirmary, Boston, Massachusetts, USA
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Chang JH, Han KY, Azar DT. Wound healing fibroblasts modulate corneal angiogenic privilege: interplay of basic fibroblast growth factor and matrix metalloproteinases in corneal angiogenesis. Jpn J Ophthalmol 2010; 54:199-205. [PMID: 20577852 DOI: 10.1007/s10384-010-0801-5] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2009] [Accepted: 02/16/2010] [Indexed: 12/17/2022]
Affiliation(s)
- Jin-Hong Chang
- Department of Ophthalmology and Visual Sciences, Illinois Eye and Ear Infirmary, University of Illinois at Chicago, Chicago, IL 60612, USA
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Oliveira HB, Sakimoto T, Javier JAD, Azar DT, Wiegand SJ, Jain S, Chang JH. VEGF Trap(R1R2) suppresses experimental corneal angiogenesis. Eur J Ophthalmol 2010; 20:48-54. [PMID: 19882518 DOI: 10.1177/112067211002000106] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
PURPOSE To determine the effect of vascular endothelial growth factor (VEGF) TrapR1R2 on bFGF-induced experimental corneal neovascularization (NV). METHODS Control pellets or pellets containing 80 ng bFGF were surgically implanted into wild-type C57BL/6 and VEGF-LacZ mouse corneas. The corneas were photographed, harvested, and the percentage of corneal NV was calculated. The harvested corneas were evaluated for VEGF expression. VEGF-LacZ mice received tail vein injections of an endothelial-specific lectin after pellet implantation to determine the temporal and spatial relationship between VEGF expression and corneal NV. Intraperitoneal injections of VEGF TrapR1R2 or a human IgG Fc domain control protein were administered, and bFGF pellet-induced corneal NV was evaluated. RESULTS NV of the corneal stroma began on day 4 and was sustained through day 21 following bFGF pellet implantation. Progression of vascular endothelial cells correlated with increased VEGF-LacZ expression. Western blot analysis showed increased VEGF expression in the corneal NV zone. Following bFGF pellet implantation, the area of corneal NV in untreated controls was 1.05+/-0.12 mm2 and 1.53+/-0.27 mm2 at days 4 and 7, respectively. This was significantly greater than that of mice treated with VEGF Trap (0.24+/-0.11 mm2 and 0.35+/-0.16 mm2 at days 4 and 7, respectively; p<0.05). CONCLUSIONS Corneal keratocytes express VEGF after bFGF stimulation and bFGF-induced corneal NV is blocked by intraperitoneal VEGF TrapR1R2 administration. Systemic administration of VEGF TrapR1R2 may have potential therapeutic applications in the management of corneal NV.
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Affiliation(s)
- Hailton B Oliveira
- The Schepens Eye Research Institute, Harvard Medical School, Boston, MA, USA
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Shi J, Ellenberg D, Kim JY, Qian H, Ripps H, Jain S, Chang JH, Azar DT. Restoration of electroretinogram activity in exenterated swine eyes following ophthalmic artery anastomosis. Restor Neurol Neurosci 2009; 27:351-7. [PMID: 19738327 DOI: 10.3233/rnn-2009-0485] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
PURPOSE To determine the feasibility of restoring electroretinogram (ERG) activity of exenterated swine eyes following in vivo arterial anastomosis. METHODS The carotid artery was exposed and cannulated. The eye was exenterated along with the extraocular muscles and surrounding connective tissue. Prior to eye transplantation, the ophthalmic artery was identified and anastomosed to the carotid artery. Perfusion was confirmed by injecting FITC-conjugated tomato lectin into the anastomotic tubing and performing confocal microscopy of retinal flat-mounts. Dark-adapted ERG and optic nerve responses were analyzed to assess retinal function, and dilated eye examination and retinal imaging were performed. RESULTS Arterial anastomosis resulted in perfusion of blood from the carotid artery through the anastomosis and into the ophthalmic artery. Arterial perfusion was confirmed by the presence of tomato lectin-stained retinal vessels. Immediately following the anastomosis, ERG and optic nerve activities were minimal. However, an "a" wave (representing photoreceptor activity), "b" wave (representing bipolar cell activity), and optic nerve responses (representing RGC activity) were detected 30 min after reperfusion. CONCLUSIONS Electroretinographic function is partially recovered following re-anastomosis of exenterated swine eyes. This model would be useful for further studies on eye transplantation.
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Affiliation(s)
- Jun Shi
- Department of Ophthalmology and Visual Sciences, University of Illinois at Chicago, Chicago, IL 60612, USA
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Abstract
AIM To report a dovetail configuration for femtosecond-enabled penetrating keratoplasty (PK) with the corresponding laser parameters and suturing technique. METHODS A 40-year-old man, with a history of penetrating corneal injury as a child, underwent femtosecond-enabled dovetail keratoplasty, anterior vitrectomy and secondary intraocular lens suturing to repair his corneal scar and aphakia. A partial thickness dovetail pattern was performed in the recipient cornea using the femotsecond laser. The posterior side-cut was initiated approximately 100 microm anterior to the Descemet membrane and extended obliquely towards the outer edge of a ring lamellar cut, positioned at approximately 300 microm stromal depth. The anterior side-cut was extended from the internal edge of the ring lamellar cut to the corneal surface. Using an artificial chamber, the femtosecond laser was used to create a full-thickness 0.2 mm oversized femtosecond-enabled dovetail trephination with similar anterior lamellar depth (approximately 300 microm). Wound closure, using interrupted 10-0 nylon sutures, was guided by preplaced radial alignment laser microincisions and tongue-in-groove midstromal suture positioning. RESULTS AND DISCUSSION Excellent alignment and stability of the donor and recipient tissue were observed immediately postoperatively and 5 months after surgery. The feasibility of the "dovetail" pattern of PK and the tongue-in-groove suture positioning is demonstrated.
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Affiliation(s)
- J Lee
- Department of Ophthalmology and Visual Sciences, Illinois Eye Ear Infirmary, University of Illinois, Chicago, IL 60612, USA
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