Abstract：
Purpose:To determine whether high glucose (HG) or diabetes alters mitochondrial morphology and promotes mitochondrial fragmentation in retinal vascular cells and thereby triggers apoptosis associated with diabetic retinopathy. Methods:To assess whether diabetes promotes mitochondrial fragmentation and thereby triggers apoptosis, retinas from nondiabetic and diabetic rats were analyzed using electron microscopy (EM) and in parallel, wild-type, diabetic, and OPA1+/- mice were analyzed for optic atrophy gene 1 (OPA1) and cytochrome c levels using Western blot (WB) analysis. To assess the relationship between mitochondrial fragmentation and OPA1 levels, rat retinal endothelial cells (RRECs) were grown in normal (N; 5 mmol/L) medium, HG (30 mmol/L) medium, or in N medium transfected with OPA1 siRNA for seven days. Cells were examined for OPA1 expression and cytochrome c release by WB. In parallel, cells were stained with MitoTracker Red and assessed for mitochondrial fragmentation in live cells using confocal microscopy. Results:EM images revealed significant mitochondrial fragmentation in vascular cells of retinal capillaries of diabetic rats compared with that of nondiabetic rats. WB analysis showed significant OPA1 downregulation concomitant with increased levels of proapoptotic cytochrome c levels in cells grown in HG and in cells transfected with OPA1 siRNA alone. Similarly, OPA1 level was significantly reduced in diabetic retinas compared with that of nondiabetic retinas. Interestingly, OPA1+/- animals exhibited elevated cytochrome c release similar to those of diabetic mice. Conclusions:Findings indicate that diabetes promotes mitochondrial fragmentation in retinal vascular cells, which are driven, at least in part, by decreased OPA1 levels leading to apoptosis in diabetic retinopathy.
journal_name
Invest Ophthalmol Vis Scijournal_title
Investigative ophthalmology & visual scienceauthors
Kim D,Roy Sdoi
10.1167/iovs.61.10.10subject
Has Abstractpub_date
2020-08-03 00:00:00pages
10issue
10eissn
0146-0404issn
1552-5783pii
2770577journal_volume
61pub_type
杂志文章abstract：Purpose:To assess if ripasudil has a neuroprotective effect using mice with excitatory amino acid carrier 1 (EAAC1) deletion (EAAC1 knockout [KO] mice), a mouse model of normal tension glaucoma. Methods:Topical administration (5 μL/day) of two different concentrations of ripasudil (0.4% and 2%) were applied to EAAC1 K...
journal_title：Investigative ophthalmology & visual science
pub_type： 杂志文章
doi：10.1167/iovs.17-23276
更新日期：2018-04-01 00:00:00
abstract：PURPOSE:To investigate the alterations in microRNA (miRNA) expression during replicative senescence (RS) in human trabecular meshwork (HTM) cells. METHODS:Two HTM cell lines were serially passaged until they reached RS. Changes in expression of 30 miRNAs were assessed by real-time quantitative (q)-PCR. The effects of ...
journal_title：Investigative ophthalmology & visual science
pub_type： 杂志文章
doi：10.1167/iovs.09-4874
更新日期：2010-06-01 00:00:00
abstract：PURPOSE:The endothelium produces nitric oxide and endothelin (ET). This study was designed to investigate the endothelium-dependent regulation of the porcine ophthalmic microcirculation. METHODS:Isolated porcine eyes were perfused with a modified Langendorff setup (Hugo Sachs Elektronik KG, Freiburg, Germany) at a per...
journal_title：Investigative ophthalmology & visual science
pub_type： 杂志文章
doi：
更新日期：1993-12-01 00:00:00
abstract：PURPOSE:To determine whether the size and configuration of the optic chiasm in humans with albinism is different from that in normal control subjects. METHODS:Seventeen patients and 15 control subjects underwent magnetic resonance imaging of the entire head. Images were reformatted to the chiasm region and analyzed wi...
journal_title：Investigative ophthalmology & visual science
pub_type： 杂志文章
doi：10.1167/iovs.02-0156
更新日期：2003-01-01 00:00:00
abstract：PURPOSE:To examine the expression of matrix metalloproteinases (MMPs) and their inhibitors during the development of retinal neovascularization (NV) in a mouse model. METHODS:A well-characterized murine model of retinal NV was used to study the expression of specific MMPs (MMP-2, MMP-9, and MT1-MMP) and tissue inhibit...
journal_title：Investigative ophthalmology & visual science
pub_type： 杂志文章
doi：
更新日期：2001-01-01 00:00:00
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journal_title：Investigative ophthalmology & visual science
pub_type： 杂志文章
doi：10.1167/iovs.09-5139
更新日期：2010-10-01 00:00:00
abstract：PURPOSE:Hormone diseases induce changes in the lacrimal gland (LG) and ocular surface (OS). Thyroid hormone (TH) induces cell proliferation and lipid metabolism through the activation of TH receptors. The aim of the present study was to evaluate the location and comparative expression of TH receptor beta-1 (Thrb) in LG...
journal_title：Investigative ophthalmology & visual science
pub_type： 杂志文章
doi：10.1167/iovs.06-1309
更新日期：2007-07-01 00:00:00
abstract：PURPOSE:This was a pilot study conducted to examine the expression of osteopontin in uveal melanoma and to determine whether serum osteopontin can be used in detecting metastatic uveal melanoma. METHODS:Osteopontin mRNA was measured in three uveal melanoma cell lines of various invasive potential by real-time PCR. Tis...
journal_title：Investigative ophthalmology & visual science
pub_type： 杂志文章
doi：10.1167/iovs.05-0422
更新日期：2006-03-01 00:00:00
abstract：:We describe an instrument called a scanning ocular spectrofluorophotometer (SOSF) that measures fluorescence in a two-dimensional cross-section through the anterior chamber and cornea and provides the ability to change excitation and emission wavelengths rapidly. The output of a xenon arc lamp is filtered by a diffrac...
journal_title：Investigative ophthalmology & visual science
pub_type： 杂志文章
doi：
更新日期：1988-08-01 00:00:00
abstract：:The hypotensive effect of ascorbate on intraocular pressure has been reported following topical application, oral administration, or anterior chamber infusion in animals. The present report describes the correlation of aqueous humor ascorbate concentration with intraocular pressure as well as outflow facility in vivo....
journal_title：Investigative ophthalmology & visual science
pub_type： 杂志文章
doi：
更新日期：1978-08-01 00:00:00
abstract：:Sodium iodate and sodium iodoacetate were employed as biological probes to evaluate component forces contributing to the strength of retinal adhesion to the retinal pigment epithelium (RPE). Iodate treatment produced a rapid reduction in the strength of adhesion, which was complete within 1 hr without evidence of conc...
journal_title：Investigative ophthalmology & visual science
pub_type： 杂志文章
doi：
更新日期：1980-12-01 00:00:00
abstract：PURPOSE:This study compared the performance of a video-based infrared three-dimensional eye tracker device (Chronos) with the scleral search coil method. METHODS:Three-dimensional eye movements were measured simultaneously with both systems during fixation, saccades, optokinetic stimulation, and vestibular stimulation...
journal_title：Investigative ophthalmology & visual science
pub_type： 杂志文章
doi：10.1167/iovs.05-0234
更新日期：2006-01-01 00:00:00
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journal_title：Investigative ophthalmology & visual science
pub_type： 临床试验,杂志文章
doi：
更新日期：1984-12-01 00:00:00
abstract：PURPOSE:To identify risk factors for the development of high-risk proliferative diabetic retinopathy (PDR) and for the development of severe visual loss or vitrectomy (SVLV) in eyes assigned to deferral of photocoagulation in the Early Treatment Diabetic Retinopathy Study (ETDRS). METHODS:Multivariable Cox models were...
journal_title：Investigative ophthalmology & visual science
pub_type： 临床试验,杂志文章,随机对照试验
doi：
更新日期：1998-02-01 00:00:00
abstract：Purpose:To assess the presence of binocular gain in macular telangiectasia type 2 (MacTel) and its correlation to paracentral scotomas. Methods:Sixty-eight patients with MacTel were consecutively recruited for a cross-sectional analysis. Best-corrected visual acuity (BCVA), reading acuity, and reading speed were teste...
journal_title：Investigative ophthalmology & visual science
pub_type： 杂志文章
doi：10.1167/iovs.18-26414
更新日期：2019-09-03 00:00:00
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journal_title：Investigative ophthalmology & visual science
pub_type： 杂志文章
doi：10.1167/iovs.06-0834
更新日期：2007-04-01 00:00:00
abstract：PURPOSE:The anatomy of individual myofibers within the orbicularis oculi muscle was examined to determine individual myofiber lengths in the different regions of the muscle. A wide variety of eyelid conditions require eyelid surgery or drug injections directly into the eyelid. Knowledge of regional myofiber anatomy and...
journal_title：Investigative ophthalmology & visual science
pub_type： 杂志文章
doi：
更新日期：1996-08-01 00:00:00
abstract：PURPOSE:To assess the repeatability and interoperator and intersession reproducibility of central corneal thickness (CCT) measurements made by a commercially available optical coherence tomography (OCT) system. METHODS:Intersession and interoperator reproducibility and repeatability were defined according to the guide...
journal_title：Investigative ophthalmology & visual science
pub_type： 杂志文章
doi：
更新日期：2002-06-01 00:00:00
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journal_title：Investigative ophthalmology & visual science
pub_type： 杂志文章
doi：10.1167/iovs.14-15920
更新日期：2014-12-23 00:00:00
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journal_title：Investigative ophthalmology & visual science
pub_type： 杂志文章
doi：
更新日期：1994-02-01 00:00:00
abstract：PURPOSE:The chemokine receptor CX3CR1 is expressed by monocyte-derived dendritic cells (DCs) and macrophages. CX3CR1 mediates leukocyte migration and adhesion in homeostatic and inflammatory conditions. Mice lacking Cx3cr1 have altered distribution and function of DC subpopulations in some tissue microenvironments. The...
journal_title：Investigative ophthalmology & visual science
pub_type： 杂志文章
doi：10.1167/iovs.07-0953
更新日期：2008-04-01 00:00:00
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journal_title：Investigative ophthalmology & visual science
pub_type： 杂志文章
doi：10.1167/iovs.10-5744
更新日期：2011-02-01 00:00:00
abstract：:The life history of melanin and lipofuscin granules of human retinal pigment epithelium (RPE) was studied in 30 human eyes spanning nine decades of life. Autofluorescent granules in the cytoplasm of eye over 30 years of age were shown, ultrastructurally and through lipid solvent extraction, to be lipofuscin granules. ...
journal_title：Investigative ophthalmology & visual science
pub_type： 杂志文章
doi：
更新日期：1978-07-01 00:00:00
abstract：PURPOSE:To determine the prevalence of presbyopia in the state of Andhra Pradesh in south India. METHODS:Comprehensive ocular examinations including logMAR (logarithm of the minimum angle of resolution) distance and near (presenting and best corrected) visual acuity, slit lamp biomicroscopy of the anterior segment, an...
journal_title：Investigative ophthalmology & visual science
pub_type： 杂志文章
doi：10.1167/iovs.05-1192
更新日期：2006-06-01 00:00:00
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journal_title：Investigative ophthalmology & visual science
pub_type： 杂志文章
doi：10.1167/iovs.11-8984
更新日期：2012-04-18 00:00:00
abstract：PURPOSE:To investigate the induction of vascular endothelial growth factor (VEGF) and basic fibroblast growth factor (bFGF) gene expression by prostaglandin E2 (PGE2) in cultured rat Müller cells and to study the mechanism of the induction. METHODS:Müller cells were obtained from neonatal Sprague-Dawley rat retinas an...
journal_title：Investigative ophthalmology & visual science
pub_type： 杂志文章
doi：
更新日期：1998-03-01 00:00:00
abstract：PURPOSE:To explore factors affecting the glaucoma diagnostic capability of macular thickness and circumpapillary retinal nerve fiber layer (cRNFL) thickness as determined by spectral domain-optical coherence tomography. METHODS:Area under the curve (AUC) of the receiver operating characteristics (ROC) discriminating h...
journal_title：Investigative ophthalmology & visual science
pub_type： 杂志文章
doi：10.1167/iovs.11-7833
更新日期：2011-10-11 00:00:00
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journal_title：Investigative ophthalmology & visual science
pub_type： 杂志文章
doi：10.1167/iovs.14-16091
更新日期：2015-08-01 00:00:00
abstract：PURPOSE:Parstatin is a 41-mer peptide formed by proteolytic cleavage on activation of the PAR1 receptor. The authors recently showed that parstatin is a potent inhibitor of angiogenesis. The purpose of the present study was to evaluate the therapeutic effect of parstatin on ocular neovascularization. METHODS:Choroidal...
journal_title：Investigative ophthalmology & visual science
pub_type： 杂志文章
doi：10.1167/iovs.10-5576
更新日期：2010-11-01 00:00:00
abstract：PURPOSE:Previous studies have demonstrated a role for the retinal pigment epithelium (RPE) in the development and maintenance of the choroidal vasculature, suggesting that RPE serves a trophic role for the choroidal vessels. The goal of this study was to determine the expression pattern of vascular endothelial growth f...
journal_title：Investigative ophthalmology & visual science
pub_type： 杂志文章
doi：10.1167/iovs.05-1229
更新日期：2006-07-01 00:00:00
