Abstract:
Purpose:To investigate the effect of reducing high glucose (HG)-induced lysyl oxidase (LOX) overexpression and increased activity on retinal endothelial cell apoptosis. Methods:Rat retinal endothelial cells (RRECs) were grown in normal (N) or HG (30 mM glucose) medium for 7 days. In parallel, RRECs were grown in HG medium and transfected with LOX small interfering RNA (siRNA), scrambled siRNA as control, or exposed to β-aminopropionitrile (BAPN), a LOX inhibitor. LOX expression, AKT activation, and caspase-3 activity were determined by Western blot (WB) analysis and apoptosis by differential dye staining assay. Moreover, to determine whether diabetes-induced LOX overexpression alters AKT activation and promotes apoptosis, changes in LOX expression, AKT phosphorylation, caspase-3 activation, and Bax expression were assessed in retinas of streptozotocin (STZ)-induced diabetic mice and LOX heterozygous knockout (LOX+/-) mice. Results:WB analysis indicated significant LOX overexpression and reduced AKT activation under HG condition in RRECs. Interestingly, when cells grown in HG were transfected with LOX siRNA or exposed to BAPN, the number of apoptotic cells was significantly decreased concomitant with increased AKT phosphorylation. Diabetic mouse retinas exhibited LOX overexpression, decreased AKT phosphorylation, and increased Bax and caspase-3 activation compared to values in nondiabetic mice. In LOX+/- mice, reduced LOX levels were observed with increased AKT activity, and reduced Bax and caspase-3 activity. Furthermore, decreased levels of LOX in the LOX+/- mice was protective against diabetes-induced apoptosis. Conclusions:Findings from this study indicate that preventing LOX overexpression may be protective against HG-induced apoptosis in retinal vascular cells associated with diabetic retinopathy.
journal_name
Invest Ophthalmol Vis Scijournal_title
Investigative ophthalmology & visual scienceauthors
Kim D,Mecham RP,Trackman PC,Roy Sdoi
10.1167/iovs.16-21340subject
Has Abstractpub_date
2017-05-01 00:00:00pages
2725-2731issue
5eissn
0146-0404issn
1552-5783pii
2629437journal_volume
58pub_type
杂志文章abstract::A method for denuding Descemet's membrane by dissection of all overlying stroma, while preserving the corneal endothelial layer, was developed and evaluated. The technique consists in treating the stroma with trypsin and surgically removing the softened stromal layers. With an automated thickness-measuring technique, ...
journal_title:Investigative ophthalmology & visual science
pub_type: 杂志文章
doi:
更新日期:1978-11-01 00:00:00
abstract:PURPOSE:The secreted Ly6/uPAR-related protein-1 (Slurp1), associated with the hyperkeratotic disorder mal de Meleda, is abundantly expressed in corneas. Here, we examine its corneal expression and functions. METHODS:Gene expression was quantified by quantitative PCR (qPCR), immunoblots, and immunofluorescent staining....
journal_title:Investigative ophthalmology & visual science
pub_type: 杂志文章
doi:10.1167/iovs.12-10759
更新日期:2012-12-19 00:00:00
abstract:PURPOSE:To establish mouse models for RPGR-associated diseases by generating and characterizing an Rpgr mutation (in-frame deletion of exon 4) in two different genetic backgrounds (BL/6 and BALB/c). METHODS:Gene targeting in embryonic stem (ES) cells was performed to introduce a in-frame deletion of exon 4 in the Rpgr...
journal_title:Investigative ophthalmology & visual science
pub_type: 杂志文章
doi:10.1167/iovs.08-2742
更新日期:2010-02-01 00:00:00
abstract:PURPOSE:To evaluate changes of levels of erythropoietin (EPO) and VEGF in aqueous humor before and after an intravitreal injection of bevacizumab (IVB) and determine the underlying correlation between them. METHODS:This prospective study involved 21 eyes of 21 patients with surgery-required advanced neovascular glauco...
journal_title:Investigative ophthalmology & visual science
pub_type: 杂志文章
doi:10.1167/iovs.12-11507
更新日期:2013-06-04 00:00:00
abstract::Recent work demonstrated that a mannose receptor is involved in the phagocytosis of rod outer segments by the rat retinal pigment epithelium (RPE). In this study the binding of soluble mannose-containing ligands by human RPE explants is described. In addition, the authors report the isolation of a mannose receptor fro...
journal_title:Investigative ophthalmology & visual science
pub_type: 杂志文章
doi:
更新日期:1991-05-01 00:00:00
abstract:PURPOSE:This study explores variation in the axial location of Bruch's membrane opening (BMO) to determine if this reference plane varies with age and race. METHODS:There were 168 spectral-domain optical coherence tomography (SDOCT) optic nerve head volumes that were obtained from healthy subjects and manually delinea...
journal_title:Investigative ophthalmology & visual science
pub_type: 杂志文章,多中心研究
doi:10.1167/iovs.13-12937
更新日期:2014-03-28 00:00:00
abstract:PURPOSE:Retinopathy of prematurity (ROP) is a major problem among very preterm survivors of neonatal intensive care. Neovascularization of the retina is prominent in the proliferative stages of ROP and is under the control of several factors such as vascular endothelial growth factor (VEGF). This study was undertaken o...
journal_title:Investigative ophthalmology & visual science
pub_type: 杂志文章
doi:10.1167/iovs.03-1303
更新日期:2004-06-01 00:00:00
abstract::The mitotic rate and goblet cell content of conjunctival epithelium following total or central corneal epithelial removal using n-heptanol was measured to determine how the conjunctival epithelium responds to injury and whether conjuctiva responds to central corneal epithelial loss. One day following a wound that remo...
journal_title:Investigative ophthalmology & visual science
pub_type: 杂志文章
doi:
更新日期:1987-09-01 00:00:00
abstract:PURPOSE:Subtle structural and functional neuroretinal changes have been described in human immunodeficiency virus (HIV)-infected adults without retinitis treated with combination antiretroviral therapy (cART). However, studies on this subject in HIV-infected children are scarce. This study aimed to assess the presence ...
journal_title:Investigative ophthalmology & visual science
pub_type: 杂志文章
doi:10.1167/iovs.15-16855
更新日期:2015-06-01 00:00:00
abstract:PURPOSE:Chronic, subclinical inflammation contributes to the pathogenesis of several ocular diseases, including age-related macular degeneration. Proinflammatory cytokines affect tight junctions in epithelia that lack claudin-19, but in the retinal pigment epithelium claudin-19 predominates. We examined the effects of ...
journal_title:Investigative ophthalmology & visual science
pub_type: 杂志文章
doi:10.1167/iovs.11-8311
更新日期:2012-07-27 00:00:00
abstract:PURPOSE:Tendency-oriented perimetry (TOP) is a new strategy designed to estimate the sensitivity of the visual field quickly, by using linear interpolation between test locations. This study determined the spatial resolution characteristics of TOP. METHODS:A Monte-Carlo technique was used to simulate visual fields, an...
journal_title:Investigative ophthalmology & visual science
pub_type: 杂志文章
doi:10.1167/iovs.02-0828
更新日期:2003-05-01 00:00:00
abstract:PURPOSE:To investigate in impression cytology (IC) specimens the expression of inflammatory and apoptosis-related markers by conjunctival epithelial cells from patients with dry eye as a rationale for treatment with topical cyclosporine. METHODS:Immunologic anomalies were identified at baseline, before treatment with ...
journal_title:Investigative ophthalmology & visual science
pub_type: 临床试验,杂志文章,多中心研究,随机对照试验
doi:
更新日期:2000-05-01 00:00:00
abstract:PURPOSE:Previous studies have shown that binocular coordination during saccadic eye movement is affected in humans with large strabismus. The purpose of this study was to examine the conjugacy of saccadic eye movements in monkeys with sensory strabismus. METHODS:The authors recorded binocular eye movements in four str...
journal_title:Investigative ophthalmology & visual science
pub_type: 杂志文章
doi:10.1167/iovs.06-0955
更新日期:2007-07-01 00:00:00
abstract:PURPOSE:Clonidine and brimonidine, two alpha-2 agonists, have been shown to reduce intraocular pressure (IOP) in patients with glaucoma. Little is known, however, about the exact role of alpha receptors in the control of ocular blood flow in the posterior pole of the eye. Hence, the study was conducted to investigate t...
journal_title:Investigative ophthalmology & visual science
pub_type: 杂志文章,随机对照试验
doi:10.1167/iovs.07-0178
更新日期:2007-09-01 00:00:00
abstract:Purpose:The lysozyme 2 (Lyz2 or LysM) cre mouse is extensively used to achieve genetic manipulation in myeloid cells and it has been widely employed in retinal research. However, LysM has been recently described to be expressed in brain neurons and there is a debate on whether it is also expressed by resident microglia...
journal_title:Investigative ophthalmology & visual science
pub_type: 杂志文章
doi:10.1167/iovs.61.3.51
更新日期:2020-03-09 00:00:00
abstract:PURPOSE:To examine the expression of c-fos proto-oncogene and phosphorylation of cAMP responsive element binding (CREB) protein in the rat retina after changes in the light-dark condition. METHODS:Rats were exposed to both steady light and flashing light and were killed at the end of light exposure. The retinas were a...
journal_title:Investigative ophthalmology & visual science
pub_type: 杂志文章
doi:
更新日期:1996-01-01 00:00:00
abstract:PURPOSE:To determine and compare gene expression patterns in the whole retina and retinal ganglion cell layer (RGCL) in a rodent glaucoma model. METHODS:IOP was unilaterally elevated in Brown Norway rats (N = 26) by injection of hypertonic saline and monitored for 5 weeks. A cDNA microarray was used on whole retinas f...
journal_title:Investigative ophthalmology & visual science
pub_type: 杂志文章
doi:10.1167/iovs.09-4663
更新日期:2010-06-01 00:00:00
abstract:PURPOSE:To determine whether poor fetal growth, as determined by size at birth, is associated with increased risk of age-related macular degeneration. METHODS:A total of 660 men and women born in Sheffield, United Kingdom, between 1922 and 1930 and whose size at birth was available were traced and invited to take part...
journal_title:Investigative ophthalmology & visual science
pub_type: 杂志文章
doi:
更新日期:2002-12-01 00:00:00
abstract:PURPOSE:Linkage intervals for erosive vitreoretinopathy (ERVR) and Wagner disease previously were found to overlap at 5q14.3. In a Japanese family with Wagner disease, a CSPG2/Versican splice site mutation (c.4004-2A-->G) was recently reported that resulted in a 39-nucleotide exon 8 in-frame deletion. We investigated w...
journal_title:Investigative ophthalmology & visual science
pub_type: 杂志文章
doi:10.1167/iovs.06-0141
更新日期:2006-08-01 00:00:00
abstract:PURPOSE:Mice (Pdegtm1/Pdegtm1) homozygous for a mutant allele of the gamma subunit of retinal cyclic guanosine monophosphate phosphodiesterase (PDE gamma) suffer a severe photoreceptor degeneration. To determine whether the antiapoptotic BCL2 gene is effective in delaying the cell death pathway in this new strain of mu...
journal_title:Investigative ophthalmology & visual science
pub_type: 杂志文章
doi:
更新日期:1997-04-01 00:00:00
abstract:Purpose:To compare in vivo lamina cribrosa (LC) strains (deformations) following acute IOP elevation in healthy, glaucoma, and ocular hypertensive subjects. Methods:There were 20 healthy, 20 high-tension primary open-angle glaucoma (POAG), 16 primary angle-closure glaucoma (PACG), and 20 ocular hypertensive (OHT; with...
journal_title:Investigative ophthalmology & visual science
pub_type: 杂志文章
doi:10.1167/iovs.17-21982
更新日期:2018-01-01 00:00:00
abstract:PURPOSE:Vitreous degeneration contributes to several age-related eye diseases, including retinal detachment, macular hole, macular traction syndrome, and nuclear cataracts. Remarkably little is understood about the molecular interactions responsible for maintaining vitreous structure. The purpose of this study was to m...
journal_title:Investigative ophthalmology & visual science
pub_type: 杂志文章
doi:10.1167/iovs.13-13026
更新日期:2014-01-03 00:00:00
abstract:PURPOSE:To assess the strength of the association between retinal nerve fiber layer (RNFL) thickness and optic disc topography measured with confocal retinal tomography (HRT II; Heidelberg Engineering, Dossenheim, Germany), optical coherence tomography (StratusOCT; Carl Zeiss Meditec, Inc., Dublin, CA), and scanning la...
journal_title:Investigative ophthalmology & visual science
pub_type: 杂志文章
doi:10.1167/iovs.05-1489
更新日期:2006-07-01 00:00:00
abstract:PURPOSE:As efforts to noninvasively measure intracranial pressure (ICP) increase, we thought it important to investigate the timing of retinal venous pulsation in relation to the intraocular and intracranial pressure pulses. METHODS:Neurosurgical patients undergoing continuous direct ICP monitoring had video recording...
journal_title:Investigative ophthalmology & visual science
pub_type: 杂志文章
doi:10.1167/iovs.12-9837
更新日期:2012-07-10 00:00:00
abstract:Purpose:To test the hypothesis that emmetropization buffers against genetic and environmental risk factors for myopia by investigating whether risk factor effect sizes vary depending on children's position in the refractive error distribution. Methods:Refractive error was assessed in participants from two birth cohort...
journal_title:Investigative ophthalmology & visual science
pub_type: 杂志文章
doi:10.1167/iovs.61.2.41
更新日期:2020-02-07 00:00:00
abstract::Two-dimensional electrophoretic maps of extracts from eleven normal and eleven keratoconus corneas were compared. Of the eleven corneas analyzed, eight were pooled and the remaining three were analyzed individually. Several differences were demonstrated between electrophoretic patterns of normal and keratoconus cornea...
journal_title:Investigative ophthalmology & visual science
pub_type: 杂志文章
doi:
更新日期:1989-12-01 00:00:00
abstract:PURPOSE:To explore the susceptibilities of adult retinal neurons in dissociated culture to treatments with excitotoxic agonists and the mechanisms of the resultant retinal cell death. METHODS:C57B6 mice were used. Retinas were removed, dissociated, plated on a polylysine/laminin substrate, and maintained in vitro for ...
journal_title:Investigative ophthalmology & visual science
pub_type: 杂志文章
doi:10.1167/iovs.04-0166
更新日期:2004-12-01 00:00:00
abstract:PURPOSE:To investigate whether mucosal immune responses directed against the ubiquitous parasite Toxoplasma gondii can be detected in tears of healthy humans. METHODS:Nonstimulated tears and blood were obtained from 62 healthy humans (mean age, 35 +/- 10 [SD] years). Serum anti-T. gondii immunoglobulin titers were det...
journal_title:Investigative ophthalmology & visual science
pub_type: 杂志文章
doi:
更新日期:2000-08-01 00:00:00
abstract:PURPOSE:To study the spatial distribution of posterior pole choroidal thickness (CT) in healthy eyes using spectral domain optical coherence tomography (SD-OCT). METHODS:Fifty-nine eyes from 30 subjects with no retinal or choroidal disease were examined with high-definition (HD) OCT using macular volume cube scanning ...
journal_title:Investigative ophthalmology & visual science
pub_type: 杂志文章
doi:10.1167/iovs.11-8046
更新日期:2011-09-01 00:00:00
abstract:PURPOSE:The iron carrier transferrin is expressed at remarkably high levels in normal retinas and is upregulated during retinal degeneration. The authors characterized the consequences of genetically reduced retinal transferrin production on retinal structure and function. METHODS:Hypotransferrinemic (HPX⁻/⁻) mice tre...
journal_title:Investigative ophthalmology & visual science
pub_type: 杂志文章
doi:10.1167/iovs.11-7436
更新日期:2012-02-02 00:00:00