Abstract：
:Transport of circulating sulfur amino acids (SAA) into the lens epithelium and de novo glutathione (GSH) synthesis were studied in the perfused guinea-pig eye. Plasma-to-aqueous transfer of SAA was in their intact form (> or = 98%) and comparable with sucrose (an extracellular marker) within 30 min. The unidirectional transport rates (ml min-1 g-1) of 35S-labeled cystine, cystine and methionine into the epithelium were: 0.0057, 0.0003 and 0.0073 from plasma, and 1.41, 0.005 and 1.69 from aqueous, respectively. The unidirectional epithelial uptake was limited to 1 min for all three [35S]SAA, and the isotopic steady-state ratio was achieved between 1 and 30 min. Cortical uptake was time-dependent and progressive between 1 and 30 min, but undetectable within 1 min. The high performance liquid chromatography (HPLC) analysis of the epithelium revealed that following 1 min of unidirectional [35S]cysteine transport, 3% of the label was incorporated into GSH and > or = 95% was as cysteine. An average incorporation of [35S]cysteine into GSH within the 30 min period was 0.83% min-1 and 1%/min for the epithelium and cortex, respectively. Infusions of [35S]cystine and methionine failed to demonstrate incorporation into GSH. Maximal rates of de novo GSH epithelial synthesis were approximately 3 and 12 pmol g-1 from plasma and aqueous cysteine, respectively. A t1/2 of 5480 hr was estimated if epithelial GSH had to be replaced exclusively by synthesis from aqueous cysteine. Given the limited aqueous and epithelial cysteine pools, and low (from cysteine) or undetectable (from cystine and methionine) incorporation of the label into GSH, we conclude that de novo GSH synthesis from circulating and aqueous SAA can be only a minor source of the millimolar concentration of GSH in the epithelium.
journal_name
Exp Eye Resjournal_title
Experimental eye researchauthors
Mackic JB,Kannan R,Kaplowitz N,Zlokovic BVdoi
10.1006/exer.1996.0260subject
Has Abstractpub_date
1997-04-01 00:00:00pages
615-26issue
4eissn
0014-4835issn
1096-0007pii
S0014-4835(96)90260-2journal_volume
64pub_type
杂志文章abstract：:Stromal transparency is a critical factor contributing to normal function of the visual system. Corneal injury, surgery, disease and infection elicit complex wound healing responses that serve to protect against insults and maintain the integrity of the cornea, and subsequently to restore corneal structure and transpa...
journal_title：Experimental eye research
pub_type： 杂志文章,评审
doi：10.1016/j.exer.2014.09.013
更新日期：2014-12-01 00:00:00
abstract：:The following lectins: Con A, WGA, sWGA, PNA, RCA and UEA were used to study developmental changes in the expression of glycoconjugates during chicken lens morphogenesis. Con A, WGA, sWGA binding epitopes were observed in the lens placode and vesicle. Once the fiber mass was formed, the glycoconjugates were mainly fou...
journal_title：Experimental eye research
pub_type： 杂志文章
doi：10.1006/exer.1996.0047
更新日期：1996-04-01 00:00:00
abstract：:Axonal cytoskeleton proteins are intrinsically related to retinal ganglion cell (RGC) health and disease. This study quantifies and documents the sectoral distribution of axonal cytoskeleton proteins in the different laminar compartments of the normal human optic nerve head (ONH). Nine human eyes were used (mean age o...
journal_title：Experimental eye research
pub_type： 杂志文章
doi：10.1016/j.exer.2014.10.006
更新日期：2014-11-01 00:00:00
abstract：:Thrombospondin-1 (TSP-1) is a multifunctional matrix protein that has recently been examined in various wound processes, primarily for its ability to activate the latent complex of transforming growth factor-beta (TGF-β). TGF-β has been shown to play a major role in stimulating mesenchymal cells to synthesize extracel...
journal_title：Experimental eye research
pub_type： 杂志文章
doi：10.1016/j.exer.2011.06.018
更新日期：2011-10-01 00:00:00
abstract：:The chelating agent Na2EDTA was perfused through the anterior chambers of monkeys eyes in an attempt to find a concentration that would cause a rise in outflow facility without harming the cornea or anterior uvea. Na2EDTA (0.5 mM) proved effective in increasing the facility within 60 min. There were marked effects on ...
journal_title：Experimental eye research
pub_type： 杂志文章
doi：10.1016/s0014-4835(87)80002-7
更新日期：1987-02-01 00:00:00
abstract：:With the combined purpose of facilitating useful vision over a lifetime, a number of ocular cells have evolved specialized features not found elsewhere in the body. The trabecular meshwork (TM) cell at the irido-corneal angle, which is a key regulator of intraocular pressure, is no exception. Examination of cells in c...
journal_title：Experimental eye research
pub_type： 杂志文章,评审
doi：10.1016/j.exer.2016.07.009
更新日期：2017-05-01 00:00:00
abstract：:There has been generally little attention paid to the utilization of biomaterials as an anti-myopia treatment. The purpose of this study was to investigate whether polymeric hydrogels, either implanted or injected adjacent to the outer scleral surface, slow ocular elongation. White Leghorn (Gallus gallus domesticus) c...
journal_title：Experimental eye research
pub_type： 杂志文章
doi：10.1016/j.exer.2008.10.029
更新日期：2009-03-01 00:00:00
abstract：:The retinal pigment epithelium is a transporting epithelium that helps regulate the volume and composition of the subretinal space surrounding photoreceptor outer segments. The capacity of the RPE to actively transport Na+ and K+ between the retina and the blood supply depends on the localization of the Na+, K(+)-ATPa...
journal_title：Experimental eye research
pub_type： 杂志文章
doi：10.1006/exer.1994.1144
更新日期：1994-11-01 00:00:00
abstract：:This study tested the hypothesis that the beta-adrenergic antagonists betaxolol and timolol, cause retinal arteriolar vasodilatation in addition to their ability to reduce intraocular pressure (IOP), and compared their vasodilatory ability with that of a known Ca2+ channel entry blocker nimodipine in donor human and p...
journal_title：Experimental eye research
pub_type： 杂志文章
doi：10.1006/exer.1998.0495
更新日期：1998-07-01 00:00:00
abstract：:The photopigment of avian pineal which mediates light sensitivity was sought via its chromophore. Chick pineal cells in primary cultures were incubated overnight in the dark with [3H]retinol. Reduction of Schiff's bases with cyanoborohydride prior to SDS-PAGE revealed radioactivity bound to a 30 kDa component in pinea...
journal_title：Experimental eye research
pub_type： 杂志文章
doi：10.1016/s0014-4835(88)80042-3
更新日期：1988-06-01 00:00:00
abstract：:Our previous gene expression analysis suggested that conjunctival epithelial cells of Sjögren's syndrome (SS) are inclined to hyper-proliferation and keratinisation status. The goal of this study is to elucidate whether such pathological situations really exist in the conjunctival epithelium of SS. Also, involvement o...
journal_title：Experimental eye research
pub_type： 杂志文章
doi：10.1016/j.exer.2005.07.009
更新日期：2006-03-01 00:00:00
abstract：:The biosafety and efficiency of transplanting retinal pigment epithelial (RPE) cells derived from both human embryonic stem cells (hESCs) and induced pluripotent stem cells (iPSCs) have been evaluated in phase I and phase II clinical trials. For further large-scale application, cryopreserved RPE cells must be used; th...
journal_title：Experimental eye research
pub_type： 杂志文章
doi：10.1016/j.exer.2020.108305
更新日期：2021-01-01 00:00:00
abstract：:Simvastatin is a cholesterol-lowering drug which exhibits numerous pleiotropic effects including anti-cancer activity. Yet, the anti-cancer effects in choroidal melanoma remain poorly characterized. Therefore, in this study, we investigated the effects of simvastatin on OCM-1 cells growth, apoptosis and cycle. Simvast...
journal_title：Experimental eye research
pub_type： 杂志文章
doi：10.1016/j.exer.2013.05.013
更新日期：2013-08-01 00:00:00
abstract：:The corneal endothelium of man, primates and carnivores has limited regenerative ability. Fibroblast growth factor (FGF) stimulates the proliferation of various mesoderm-derived cells, including corneal endothelial cells, in vitro. In the present work the effect of FGF on the regeneration of injured cat endothelium in...
journal_title：Experimental eye research
pub_type： 杂志文章
doi：10.1016/s0014-4835(87)80097-0
更新日期：1987-12-01 00:00:00
abstract：:The bird retina offers an excellent model to investigate the mechanisms that coordinate the morphogenesis, histogenesis, and differentiation of neuron and glial cells. Although these developmental features have been intensively studied in the chicken (Gallus gallus, Linnaeus 1758), a precocial bird species, little is ...
journal_title：Experimental eye research
pub_type： 杂志文章
doi：10.1016/j.exer.2019.107869
更新日期：2020-01-01 00:00:00
abstract：:Preeclampsia (PE) is a hypertensive complication of pregnancy. Its cause is still unknown and it could be a risk factor for future ophthalmic problems. Retinal vascular bed alterations have been described as a consequence of PE, suggesting a retinopathy. Factors related to angiogenesis and vascular permeability, such ...
journal_title：Experimental eye research
pub_type： 杂志文章
doi：10.1016/j.exer.2020.107981
更新日期：2020-04-01 00:00:00
abstract：:Recent studies of the distribution and relative concentration of caveolin-1 in fractions of bovine lens epithelial and fiber cells have led to the novel concept that caveolin-1 may largely exist as a peripheral membrane protein in some cells. Caveolin-1 is typically viewed as a scaffolding protein for caveolae in plas...
journal_title：Experimental eye research
pub_type： 杂志文章
doi：10.1016/j.exer.2007.05.011
更新日期：2007-10-01 00:00:00
abstract：:Beta-crystallins are major protein constituents of the mammalian lens, where their stability and association into higher order complexes are critical for lens clarity and refraction. Dimerization is an initial step in formation of beta-crystallin complexes. Beta-crystallin association into dimers is energetically high...
journal_title：Experimental eye research
pub_type： 杂志文章,评审
doi：10.1016/j.exer.2004.06.011
更新日期：2004-09-01 00:00:00
abstract：:Fungal keratitis is a common disease that causes blindness. An effective animal model for fungal keratitis is essential for advancing research on this disease. Our objective is to develop a novel mouse model of Fusarium solani keratitis through the inoculation of fluorescent-labeled fungi into the cornea to facilitate...
journal_title：Experimental eye research
pub_type： 杂志文章
doi：10.1016/j.exer.2013.03.002
更新日期：2013-05-01 00:00:00
abstract：:Rituximab is a monoclonal antibody directed against the CD20 B-cell antigen and is approved for the treatment of B-cell lymphoma. We investigated the pharmacokinetics of rituximab following intravitreal administration to assess the feasibility of treating primary intraocular lymphoma. Intravitreal injections of rituxi...
journal_title：Experimental eye research
pub_type： 杂志文章
doi：10.1016/j.exer.2005.09.018
更新日期：2006-05-01 00:00:00
abstract：:Calf lens alpha-crystallin was isolated and the lysine residues were extensively modified with a variety of chemical agents. The effect of these modifications on elastase inhibitor activity, apparent molecular size, antibody reactivity and solubility were determined. The addition of either a methyl group or a threose ...
journal_title：Experimental eye research
pub_type： 杂志文章
doi：10.1006/exer.1993.1015
更新日期：1993-01-01 00:00:00
abstract：:The early events that occur rapidly after injury trigger signal cascades that are essential for proper wound closure of corneal epithelial cells. We hypothesize that injury releases ATP, which stimulates purinergic receptors and elicits the phosphorylation of epidermal growth factor receptor (EGFR) tyrosine residues a...
journal_title：Experimental eye research
pub_type： 杂志文章
doi：10.1016/j.exer.2007.03.009
更新日期：2007-07-01 00:00:00
abstract：:Myo/Nog cells are essential for eye development in the chick embryo and respond to injury in adult tissues. These cells express mRNA for the skeletal muscle specific transcription factor MyoD, the bone morphogenetic protein (BMP) inhibitor Noggin and the cell surface protein recognized by the G8 monoclonal antibody (m...
journal_title：Experimental eye research
pub_type： 杂志文章,评审
doi：10.1016/j.exer.2015.11.023
更新日期：2016-05-01 00:00:00
abstract：:Recent studies indicate a key role of Mitf (microphthalmia-associated transcription factor) in the differentiation of the retinal pigment epithelium (RPE). To explore transdifferentiation processes, we used small interfering RNA (siRNA) targeting Mitf. Transfection of embryonic chick RPE cells with a non-silencing flu...
journal_title：Experimental eye research
pub_type： 杂志文章
doi：10.1016/j.exer.2005.01.004
更新日期：2005-07-01 00:00:00
abstract：:Between 5 and 70% of genetic disease is caused by in-frame nonsense mutations, which introduce a premature termination codon (PTC) within the disease-causing gene. Consequently, during translation, non-functional or gain-of-function truncated proteins of pathological significance, are formed. Approximately 50% of all ...
journal_title：Experimental eye research
pub_type： 杂志文章,评审
doi：10.1016/j.exer.2017.01.001
更新日期：2017-02-01 00:00:00
abstract：:We sought to characterize the ocular pharmacology, tolerability and intraocular pressure (IOP)-lowering efficacy of FR-190997, a non-peptidic bradykinin (BK) B2-receptor agonist. FR-190997 possessed a relatively high receptor binding affinity (Ki = 27 nM) and a high in vitro potency (EC50 = 18.3 ± 4.4 nM) for inositol...
journal_title：Experimental eye research
pub_type： 杂志文章
doi：10.1016/j.exer.2014.10.008
更新日期：2014-11-01 00:00:00
abstract：:Whole mounts of lens epithelia from rats fed on a galactose-rich diet for one, two, three or seven days were examined for morphological alterations. The meridional rows of epithelia from lenses of animals fed on galactose for seven days were found to be grossly disorganized or abnormally elongated. There was some indi...
journal_title：Experimental eye research
pub_type： 杂志文章
doi：10.1016/0014-4835(84)90183-0
更新日期：1984-06-01 00:00:00
abstract：:Erythropoietin (EPO) plays a critical role in the vascular system and exhibits angiogenic activity in endothelial cells (ECs) such as stimulation of cell proliferation, migration and tube formation in vitro. EPO is the major regulator of cell proliferation and differentiation of erythroid precursors and there by preve...
journal_title：Experimental eye research
pub_type： 杂志文章,收录出版
doi：10.1016/j.exer.2010.03.005
更新日期：2010-06-01 00:00:00
abstract：:Intravitreal cidofovir has been shown to be a long acting and highly efficacious treatment for CMV retinitis; however decrease in IOP is an adverse effect. We wanted to determine the effect of cidofovir on intraocular pressure (IOP) in the guinea pig, and rabbit eye to develop an animal model of cidofovir induced ocul...
journal_title：Experimental eye research
pub_type： 杂志文章
doi：10.1006/exer.1996.0273
更新日期：1997-05-01 00:00:00
abstract：:This study evaluated the efficacy of Plasma rich in growth factors (PRGF-Endoret) on the corneal wound healing process after Photorefractive keratectomy (PRK). To address this, blood from three healthy donors was collected, centrifuged and, the whole plasma column (WP) and the plasma fraction with the highest platelet...
journal_title：Experimental eye research
pub_type： 杂志文章
doi：10.1016/j.exer.2013.07.007
更新日期：2013-10-01 00:00:00
