Abstract:
PURPOSE:To characterize the effect of glutamate receptor activation/inhibition on the secretion of vascular endothelial growth factor (VEGF) in retina-specific glial (Müller) cells under experimental conditions of hyperglycemia and hypoxia, two intrinsic pathologic conditions of diabetic retinopathy. METHODS:Purified rat Müller cells were grown in normoglycemic or diabetic-like, hyperglycemic (5.6 or 25 mM glucose, respectively) culture media under normoxic or chemically-induced hypoxic conditions. After treatments, cells were incubated with glutamate receptor agonists and antagonists and VEGF secretion was determined by ELISA. Cell viability was determined by Lactate Dehydrogenase (LDH) secretion-assay and Ki67 immunocytochemistry. Activation of the Akt signal transduction pathway was assessed by western blot using antibodies against phosphorylated Akt. The bio-activity of the secreted VEGF was analyzed by western blot with a phospho-VEGF receptor 2 specific antibody and an in vitro endothelial cell proliferation assay. RESULTS:In control (normoglycemic/normoxic) conditions, N-methyl-D-aspartate receptor (NMDA-R) antagonists MK801 and AP-5 increased secretion of VEGF from Müller cells, and this was not observed after AMPA/kainate receptor blockade. VEGF secretion after NMDA-R antagonists was independent of cell proliferation or cell lysis and it was maintained in cultures grown in hyperglycemia or hypoxia. However, under hyperglycemic and hypoxic conditions, the observed phenomenon was impaired. We also determined that NMDA-R blockade causes a rapid and sustained increase on Akt phosphorylation, a signaling molecule that has been previously linked to VEGF expression. Müller cell-derived VEGF was capable of promoting VEGF receptor 2 phosphorylation and proliferation of endothelial cells. CONCLUSIONS:Our results show that NMDA-R exert a tonic inhibition on VEGF secretion in cultures of rat purified Müller cells and indicate that in healthy retina, glutamatergic stimulation could potentially contribute to the protective antiangiogenic role of Müller glia. We suggest that conditions present on diabetic retinopathy could cause malfunction of control points on VEGF synthesis on Müller cells.
journal_name
Curr Eye Resjournal_title
Current eye researchauthors
Cervantes-Villagrana AR,Garcia-Román J,González-Espinosa C,Lamas Mdoi
10.3109/02713683.2010.483312subject
Has Abstractpub_date
2010-08-01 00:00:00pages
733-41issue
8eissn
0271-3683issn
1460-2202journal_volume
35pub_type
杂志文章abstract::Many tissues which require vitamin A store the vitamin as long-chain fatty acyl esters of retinol. As part of a study designed to characterize vitamin A metabolism in the lacrimal gland, which transports retinol from blood to lacrimal gland fluid, extracts from lacrimal glands of rabbits and rats were analyzed by non-...
journal_title:Current eye research
pub_type: 杂志文章
doi:10.3109/02713688809015147
更新日期:1988-10-01 00:00:00
abstract:PURPOSE:To compare the quality of corneal endothelium of precut Descemet-stripping automated endothelial keratoplasty (DSAEK) tissue when transported with and without the anterior lamellar corneal tissue (ALCT) when organ-culture corneal storage methods are used. METHODS:After microkeratome-assisted excision of anteri...
journal_title:Current eye research
pub_type: 杂志文章
doi:10.3109/02713683.2011.648045
更新日期:2012-02-01 00:00:00
abstract:PURPOSE:To investigate the biomechanical effect induced by radial keratotomy on outflow facility in paired, enucleated whole porcine eyes. METHODS:Freshly enucleated porcine eyes were perfused at a constant pressure of 10 mm Hg. Radial keratotomy (RK), with a 3.5 mm central clear zone and eight radial incisions, was p...
journal_title:Current eye research
pub_type: 杂志文章
doi:10.1076/ceyr.16.12.1193.5027
更新日期:1997-12-01 00:00:00
abstract:PURPOSE:Most studies of cell growth of the RPE employ cultures which have been previously passaged, but here we investigated freshly-explanted RPE cells, which may have been growth-quiescent for years, within the eye to determine whether co-culture affects initial outgrowth in primary culture. METHODS:Bovine or human ...
journal_title:Current eye research
pub_type: 杂志文章
doi:10.1076/ceyr.16.9.891.5051
更新日期:1997-09-01 00:00:00
abstract:PURPOSE:A new technique for the cryopreservation of rabbit corneas in 20% w/w dimethylsulfoxide, which has been shown to preserve significant structural and functional integrity of the endothelium, was tested in porcine corneas. METHODS:The characteristics of uptake of dimethylsulfoxide into porcine corneas were measu...
journal_title:Current eye research
pub_type: 杂志文章
doi:10.1076/ceyr.19.3.228.5310
更新日期:1999-09-01 00:00:00
abstract::Purpose: To investigate to what extent the OSDI can be utilized as a discriminative test for clinical findings. Methods: One thousand and ninety patients with dry eye disease (DED) were consecutively included and examined for osmolarity, tear film break-up time (TFBUT), ocular protection index (OPI), ocular surface st...
journal_title:Current eye research
pub_type: 杂志文章
doi:10.1080/02713683.2019.1604972
更新日期:2019-09-01 00:00:00
abstract:PURPOSE:Retinal ischemia and neovascularization (NV) are important components of many retinal disorders. To facilitate further investigation of retinal ischemia and neovascularization, we sought to develop a reproducible in vivo experimental model of venous occlusion by photodynamic thrombosis in rats. METHODS:After a...
journal_title:Current eye research
pub_type: 杂志文章
doi:10.1076/ceyr.16.1.26.5116
更新日期:1997-01-01 00:00:00
abstract::Corneal acidosis has been shown to reduce corneal hydration control (CHC) as measured by the rate, expressed as the percent recovery per hour (PRPH), at which the thickness of the cornea decreases exponentially after an increased hydration load. Since the effect of pH on corneal function is of scientific interest and ...
journal_title:Current eye research
pub_type: 临床试验,杂志文章,随机对照试验
doi:10.3109/02713689508999932
更新日期:1995-05-01 00:00:00
abstract:PURPOSE:Folic acid (FA) is an essential nutrient for normal embryonic development. FA deficiency (FAD) in maternal diet increases the risk of several defects among the progeny, especially, neural tube defects. The eye begins its development from the neural tube; however, the relationship between FAD and ocular developm...
journal_title:Current eye research
pub_type: 杂志文章
doi:10.1080/02713683.2018.1545911
更新日期:2019-04-01 00:00:00
abstract:PURPOSE:Robo1, a member of the roundabout (Robo) family, serves as neuronal guidance receptors and has been reported to mediate tumor angiogenesis. In this study, we investigated the function of Robo1 and its possible role in retinal angiogenesis in vitro and in vivo. METHODS:Expression of Robo1 in relation to retinal...
journal_title:Current eye research
pub_type: 杂志文章
doi:10.3109/02713680903308495
更新日期:2009-12-01 00:00:00
abstract:PURPOSE:To evaluate serum and aqueous humor levels of fetuin-A in patients with pseudoexfoliation syndrome (PEXS) in comparison with those of age- and sex-matched healthy subjects. MATERIALS AND METHODS:This prospective study included 25 patients with PEXS and 25 control subjects who were undergoing cataract surgery w...
journal_title:Current eye research
pub_type: 杂志文章
doi:10.1080/02713683.2017.1324629
更新日期:2017-10-01 00:00:00
abstract:PURPOSE:Investigated the effect of N-3-aminomethylbenzylacetamidine (1400 W), a highly selective inhibitor of inducible nitric oxide synthase (iNOS), on the effector phase of EAU. METHODS:Sixteen Lewis rats were sensitized with bovine retinal S-antigen; ten of them injected subcutaneously with 1400 W (20 mg/kg) three ...
journal_title:Current eye research
pub_type: 杂志文章
doi:10.1076/ceyr.26.1.1.14250
更新日期:2003-01-01 00:00:00
abstract:PURPOSE:This study was performed to compare the positive predictive value of peripapillary retinal nerve fiber layer (RNFL) thickness measurements obtained using Cirrus high-definition optical coherence tomography (Cirrus HD-OCT; Carl Zeiss Meditec, Dublin, CA) and spectral OCT/scanning laser ophthalmoscopy (SLO) (OPKO...
journal_title:Current eye research
pub_type: 临床试验,杂志文章
doi:10.3109/02713683.2013.824989
更新日期:2014-01-01 00:00:00
abstract:PURPOSE:Intravitreal injection of ciliary neurotrophic factor (CNTF) is known to induce glial intermediate filament protein (GFAP) expression in retinal Müller cells. Because CNTF binding can activate multiple signaling kinases, we have examined the involvement of JAK/STAT pathway in GFAP induction in Müller cells. ME...
journal_title:Current eye research
pub_type: 杂志文章
doi:10.1076/ceyr.24.4.305.8408
更新日期:2002-04-01 00:00:00
abstract:PURPOSE:It has been demonstrated that chick eye growth compensates for defocus imposed by spectacle lenses: the eye elongates in response to hyperopic defocus imposed by negative lenses and slows its elongation in response to myopic defocus imposed by positive lenses. We ask whether the synthesis of scleral extracellul...
journal_title:Current eye research
pub_type: 杂志文章
doi:10.1076/ceyr.16.4.320.10697
更新日期:1997-04-01 00:00:00
abstract:PURPOSE:To evaluate the toxicity of indocyanine green (ICG) in combination with light. METHODS:Human retinal pigment epithelial cells (ARPE-19) and rat neurosensory retinal cells (R28) were treated with four different concentrations of ICG in combination with light exposure. Cell viability, mitochondrial function, and...
journal_title:Current eye research
pub_type: 杂志文章
doi:10.1080/02713680590959312
更新日期:2005-06-01 00:00:00
abstract:PURPOSE/AIMS:To evaluate the prognostic factors for the best corrected visual acuity (BCVA) and central subfield macular thickness (CSMT) after vitrectomy with internal limiting membrane (ILM) peeling for diabetic macular edema. MATERIALS AND METHODS:A total of 44 eyes of 35 patients who had undergone vitrectomy with ...
journal_title:Current eye research
pub_type: 杂志文章
doi:10.3109/02713683.2013.820327
更新日期:2013-12-01 00:00:00
abstract::The effect of cyclosporine (CsA) treatment in both primary and secondary Chlamydia trachomatis ocular infection in cynomolgus monkeys was studied. Following primary infection, CsA-treated animals developed severe clinical symptoms which persisted for up to 12 weeks compared to control animals which developed less seve...
journal_title:Current eye research
pub_type: 杂志文章
doi:10.3109/02713688709034831
更新日期:1987-05-01 00:00:00
abstract::Rainbow trout (Oncorhynchus mykiss) were used to model the solar radiation-induced cataract that occurs in hatchery-reared lake trout (Salvelinus namaycush). Rainbow trout eyes were exposed to wideband predominantly UVB radiant energy from a filtered 1000W xenon source. Lenticular damage was assessed and classified an...
journal_title:Current eye research
pub_type: 杂志文章
doi:10.3109/02713689308999477
更新日期:1993-02-01 00:00:00
abstract:PURPOSE:To determine the role of matrix metalloproteinase 9 (MMP9) in advanced glycation end-products (AGEs) induced damage to blood-retinal barrier (BRB) and the therapeutic effects of minocycline, an MMP inhibitor, against the BRB damages. METHODS:Forty-eight Sprague Dawley rats were randomly assigned to 3 groups (1...
journal_title:Current eye research
pub_type: 杂志文章
doi:10.1080/02713680802450984
更新日期:2008-11-01 00:00:00
abstract:PURPOSE:Recent advances in technology now provide tools capable of tracking genome-wide expression changes occurring in progressive pathological processes. The present experiments were carried out to determine if acetylcholine receptor α 6 subunit (Chrna6) is a reliable retinal ganglion cell (RGC) marker in adult mouse...
journal_title:Current eye research
pub_type: 杂志文章
doi:10.3109/02713683.2012.724512
更新日期:2013-01-01 00:00:00
abstract:PURPOSE:To compare the efficacy and tolerability of diclofenac and bromfenac ophthalmic solutions as adjunctive therapy after cataract surgery. MATERIALS AND METHODS:This prospective randomized controlled study included 130 patients who underwent cataract surgery. One hundred patients were randomized to receive postop...
journal_title:Current eye research
pub_type: 杂志文章,随机对照试验
doi:10.1080/02713683.2018.1501489
更新日期:2018-12-01 00:00:00
abstract:PURPOSE:Transplantation of in vitro cultured limbal epithelial stem cells (LESCs) is a treatment widely used for LESC deficiency. However, the number of limbal tissue donors is limited, and protocols for LESC cultivation often include compounds and/or feeder layers that can induce side effects and/or increase the cost ...
journal_title:Current eye research
pub_type: 杂志文章
doi:10.1080/02713683.2016.1250278
更新日期:2017-05-01 00:00:00
abstract:PURPOSE:Histidine is an indispensable amino acid with an imidazole ring and it is a precursor of histamine, carnosine, and anserine. Histidine has been proposed to act as a neurotransmitter or neuromodulator in mammalian central nervous system (CNS), including retina. In this study, we report histidine-like immunoreact...
journal_title:Current eye research
pub_type: 杂志文章
doi:10.1076/ceyr.16.6.600.5084
更新日期:1997-06-01 00:00:00
abstract:PURPOSE:To determine whether substance P is present in human tears. METHODS:Tear samples (1-2 microliters) were collected from one eye of each of 12 subjects. Two of the eyes had dry eye syndrome, two wore contact lenses and had dry eye syndrome, and eight were normal. Five of the eight normal eyes were scheduled to u...
journal_title:Current eye research
pub_type: 杂志文章
doi:10.1076/ceyr.16.9.960.5040
更新日期:1997-09-01 00:00:00
abstract:AIMS:To elucidate the intramuscular distribution and branching patterns of the abducens nerve in the lateral rectus (LR) muscle so as to provide anatomical confirmation of the presence of compartmentalization, including for use in clinical applications such as botulinum toxin injections. METHODS:Thirty whole-mount hum...
journal_title:Current eye research
pub_type: 杂志文章
doi:10.1080/02713683.2018.1438631
更新日期:2018-06-01 00:00:00
abstract:PURPOSE:To investigate optic nerve head (ONH) pallor quantitatively in patients with primary open-angle glaucoma (POAG) and in healthy subjects, and to examine the relationship to mean deviation in perimetry (MD), cup-disk ratio (CDR), and diameters of retinal vessels. METHODS:A total of 89 POAG patients (67.6 ± 11.1 ...
journal_title:Current eye research
pub_type: 杂志文章
doi:10.1080/02713683.2017.1307415
更新日期:2017-09-01 00:00:00
abstract:PURPOSE:To compare the long-term outcomes and recurrence rate of extensive versus limited subconjunctival pterygium excision with conjunctival autograft. METHODS:This retrospective study included 135 consecutive patients (161 eyes) who had pterygium excision with conjunctival autograft at the cornea performed at the c...
journal_title:Current eye research
pub_type: 杂志文章
doi:10.1080/02713680802045099
更新日期:2008-05-01 00:00:00
abstract:PURPOSE:To examine the effect of elevated extracellular glucose, thus simulating diabetes, on migration, adhesion and proliferation of SV40 transformed human corneal epithelial (HCE) cells. METHODS:HCE cells were maintained in serum supplemented media containing 5 mM, 17.5 mM or 38 mM D-glucose. Cell migration was det...
journal_title:Current eye research
pub_type: 杂志文章
doi:10.1076/ceyr.17.9.924.5133
更新日期:1998-09-01 00:00:00
abstract::Serum zinc and copper levels were analyzed in 26 retinitis pigmentosa patients and compared with serum zinc levels of a control group. Serum zinc levels were documented to be decreased with a mean concentration of 0.735 +/- 0.167 micrograms/ml (p less than 0.001). Serum copper levels, on the other hand, were found to ...
journal_title:Current eye research
pub_type: 杂志文章
doi:10.3109/02713688409011750
更新日期:1984-08-01 00:00:00