Abstract：
:To apply nuclear magnetic resonance (NMR) spectroscopy to study the penetration of dexamethasone phosphate into the aqueous humour from rabbit following topical administration. After topical administration of 0.1%, 1.0% and 10% dexamethasone phosphate solutions, respectively, samples of aqueous humour were aspirated, freeze-dried, redissolved in deuterium oxide and analyzed by high resolution 1H and 19F NMR spectroscopy. In order to study the lipophilic and hydrophilic metabolites of the drug, samples obtained after application of 1% dexamethasone phosphate were extracted with methanol/chloroform, and then extracted with perchloric acid. In all samples obtained from eyes denuded of the corneal epithelium prior to administration of dexamethasone, signals corresponding to the chemical shifts of the drug were identified in 19F NMR spectra. In the experiments performed with 1% dexamethasone phosphate, both dexamethasone and dexamethasone phosphate were detected in the aqueous humour. Using 10% dexamethasone phosphate solutions, signals from the drug were detected in 1H NMR spectra simultaneously with signals from about twenty other substances present in the aqueous humour. NMR spectroscopy appears to be a valuable method for studying dexamethasone metabolism and penetration into ocular tissues. It provides simultaneous detection of both the drug metabolites and other substances in the sample and might offer a complementary approach to other analytical methods.
journal_name
Exp Eye Resjournal_title
Experimental eye researchauthors
Midelfart A,Dybdahl A,MUller N,Sitter B,Gribbestad IS,Krane Jdoi
10.1006/exer.1997.0429subject
Has Abstractpub_date
1998-03-01 00:00:00pages
327-37issue
3eissn
0014-4835issn
1096-0007pii
S0014-4835(97)90429-2journal_volume
66pub_type
杂志文章abstract：:RPE65-related Leber's congenital amaurosis (LCA) is a rod-cone dystrophy whose clinical outcome is mainly attributed to the loss of rod photoreceptors followed by cone degeneration. Pathogenesis in Rpe65(-/-) mice is characterized by a slow and progressive degeneration of rods dependent on the constitutive activation ...
journal_title：Experimental eye research
pub_type： 杂志文章
doi：10.1016/j.exer.2011.12.019
更新日期：2012-03-01 00:00:00
abstract：:Developing canine retina, fixed in Bouin's or Tellyesnizky's acetic alcoholic formalin, was examined with a battery of biotinylated lectins. ConA and WGA consistently bound to all retinal layers including the tapetum cellulosum, retinal pigment epithelium, inner and outer segments, plexiform layers and ganglion cells....
journal_title：Experimental eye research
pub_type： 杂志文章
doi：10.1016/0014-4835(90)90150-s
更新日期：1990-10-01 00:00:00
abstract：:The relative distribution of acetylcholine (ACh) receptors on the surface of the isolated ocular lens of the rabbit was determined from induced changes in translens short-circuit current (I(SC)) and the translenticular resistance (R(t)) at seven delineated, parallel zones from the anterior to the posterior pole. For t...
journal_title：Experimental eye research
pub_type： 杂志文章
doi：10.1006/exer.2002.1185
更新日期：2002-06-01 00:00:00
abstract：:Dark-rearing has been found to slow the rate of retinal degeneration in albino P23H but not S334ter mutant rhodopsin transgenic (Tg) rats. Since eye pigmentation has the same protective slowing effect as dark-rearing in RCS rats, we examined whether eye pigmentation has a comparable slowing effect in the different mut...
journal_title：Experimental eye research
pub_type： 杂志文章
doi：10.1016/j.exer.2019.107755
更新日期：2019-10-01 00:00:00
abstract：:Eyes with age-related macular degeneration (AMD) demonstrate accumulation of specific deposits and extracellular matrix (ECM) molecules under the retinal pigment epithelium (RPE). AMD is about two times more prevalent in aging postmenopausal women. Therefore we studied whether 17beta-estradiol (E(2)) modulates the exp...
journal_title：Experimental eye research
pub_type： 杂志文章
doi：10.1016/j.exer.2008.01.010
更新日期：2008-04-01 00:00:00
abstract：:We wished to conduct a light and electron microscopic investigation of pigmentation within the trabecular meshwork of normals and primary open angle glaucoma (POAG) patients. In particular we wished to get a precise determination of whether there was a relationship between pigmentation and age. In addition we wanted t...
journal_title：Experimental eye research
pub_type： 杂志文章
doi：10.1016/j.exer.2005.10.009
更新日期：2006-06-01 00:00:00
abstract：:Immunofluorescent imaging is an indispensable technique to study morphology and molecular aspects in tissues. Classical approaches make it necessary to cut physical sections of tissue samples to overcome the limited penetration depth of light, restricting the available information to two dimensions. Recent advances in...
journal_title：Experimental eye research
pub_type： 杂志文章
doi：10.1016/j.exer.2018.12.001
更新日期：2019-03-01 00:00:00
abstract：BACKGROUND:The laser-induced choroidal neovascularization (CNV) mouse model, as the most classic animal model of age-related macular degeneration (AMD), has been widely used. We designed a hand-held mouse holder to optimize mouse fixation in the laser-induced CNV modelling process, which was inconvenient until now. Thi...
journal_title：Experimental eye research
pub_type： 杂志文章
doi：10.1016/j.exer.2020.108392
更新日期：2020-12-15 00:00:00
abstract：:The facilitated diffusion glucose transporter in the plasma membrane of intact outer segments isolated from bovine retinal rods (ROS) was characterized by measurements of: (1) 14C-labeled 3-O-methylglucose fluxes; and (2) glucose-sensitive binding of 3H-labeled cytochalasin B to ROS membranes. Inhibition of 3-O-methyl...
journal_title：Experimental eye research
pub_type： 杂志文章
doi：10.1006/exer.1994.1117
更新日期：1994-09-01 00:00:00
abstract：:Retinal stimulation with high spatial resolution requires close proximity of electrodes to target cells. This study examines the effects of material coatings and 3-dimensional geometries of subretinal prostheses on their integration with the retina. A trans-scleral implantation technique was developed to place microfa...
journal_title：Experimental eye research
pub_type： 杂志文章
doi：10.1016/j.exer.2008.09.018
更新日期：2009-01-01 00:00:00
abstract：:Cochlin deposits were observed in the trabecular meshwork (TM) of 8-month-old glaucomatous DBA/2J mice, coincident with the reported onset of increased intraocular pressure and optic nerve damage. An age-dependent increase in cochlin was observed up to 10 months of age and was paralleled by a decrease in type II colla...
journal_title：Experimental eye research
pub_type： 信件
doi：10.1016/j.exer.2005.01.028
更新日期：2005-05-01 00:00:00
abstract：:The mass receptor potential of the excised, superfused retina of the bullfrog was studied. Photoreceptor responses were isolated by addition of sodium aspartate to the Ringer solutions. Responses of the cones were monitored independently from responses of the rods by employing a two-flash method of stimulation which t...
journal_title：Experimental eye research
pub_type： 杂志文章
doi：10.1016/0014-4835(84)90007-1
更新日期：1984-08-01 00:00:00
abstract：:Post-translational modifications by transglutaminase may contribute to the remodeling of cellular architecture in the development of lens fiber cells, and there is evidence that the enzyme may also play a role in cataract formation. It catalyses hydrolytic deamidations as well as amide exchanges on select glutamine si...
journal_title：Experimental eye research
pub_type： 杂志文章
doi：10.1006/exer.1997.0463
更新日期：1998-05-01 00:00:00
abstract：:Keratoconus is a debilitating corneal thinning disease that principally develops in the second and third decades of life. Our group previously developed a novel approach to studying keratoconus, based on the observation that there is a gradient of damage across the keratoconic cone. We identified a number of cellular ...
journal_title：Experimental eye research
pub_type： 杂志文章
doi：10.1016/s0014-4835(03)00148-9
更新日期：2003-10-01 00:00:00
abstract：:Photovoltaic arrays (PVA) implanted into the subretinal space of patients with retinitis pigmentosa (RP) are designed to electrically stimulate the remaining inner retinal circuitry in response to incident light, thereby recreating a visual signal when photoreceptor function declines or is lost. Preservation of inner ...
journal_title：Experimental eye research
pub_type： 杂志文章
doi：10.1016/j.exer.2014.09.004
更新日期：2014-11-01 00:00:00
abstract：:Lens epithelium-derived growth factor (LEDGF) has been shown to enhance survival of lens epithelial cells (LECs) against stress. The objectives of these studies are to determine how LEDGF controls PKC gamma activity in normal LECs: how this control of PKC gamma regulates the phosphorylation of Connexin 43, the inhibit...
journal_title：Experimental eye research
pub_type： 杂志文章
doi：10.1016/s0014-4835(03)00049-6
更新日期：2003-05-01 00:00:00
abstract：:Proliferative diabetic retinopathy (PDR) is characterized by intraocular formation of fibroglial vascularized tissue by active vasoproliferative mechanisms. Using immunocytochemistry, we have studied changes in the distribution pattern of fibronectin (FN), laminin (LN), vitronectin (VN) and their receptors in the newl...
journal_title：Experimental eye research
pub_type： 杂志文章
doi：10.1016/s0014-4835(05)80079-x
更新日期：1995-01-01 00:00:00
abstract：:A dark reaction is known to occur in retinal extracts of the gecko (Gekko gekko), in which the natural 11-cis-chromophore of the 521-pigment is apparently replaced by adding 9-cis-retinal to form the 9-cis-photopigment. With chloride-deficient extracts the reaction involves some 70% of the 521-pigment. Anions like nit...
journal_title：Experimental eye research
pub_type： 杂志文章
doi：10.1016/0014-4835(89)90074-2
更新日期：1989-07-01 00:00:00
abstract：:Basic fibroblast growth factor (bFGF) has been shown to rescue dying photoreceptor cells in the RCS rat, a model with a genetic defect of the RPE that impairs outer segment phagocytosis. The purpose of the present study was to determine whether intravitreal injection of bFGF would have a similar effect on photorecepto...
journal_title：Experimental eye research
pub_type： 杂志文章
doi：10.1006/exer.1996.0147
更新日期：1996-11-01 00:00:00
abstract：:Age-related Macular Degeneration (AMD) is the leading cause of visual impairment and blindness in the elderly in developed countries. Neovascular/exudative (wet) AMD is the aggressive form of AMD and can involve choroidal neovascularization and vascular leakage. Anti-vascular endothelial growth factor (anti-VEGF) medi...
journal_title：Experimental eye research
pub_type： 杂志文章
doi：10.1016/j.exer.2016.02.010
更新日期：2016-04-01 00:00:00
abstract：:Thioltransferase (TTase) activity was identified and partially purified from the ocular tissue for the first time. The enzyme activity depended on the presence of reduced glutathione (GSH), glutathione reductase (GR) and NADPH to reduce the disulfide bond in a synthetic substrate, hydroxyl ethyl disulfide (HEDS). Maxi...
journal_title：Experimental eye research
pub_type： 杂志文章
doi：10.1006/exer.1996.0133
更新日期：1996-10-01 00:00:00
abstract：:A serum-free culture of chicken retinal pigmented epithelial cells has been established in order to analyse how cell-substrate interactions or environmental factors affect the process of transdifferentiation into lens cells from pigmented epithelial cells. The serum-free culture medium for chicken pigmented epithelial...
journal_title：Experimental eye research
pub_type： 杂志文章
doi：10.1016/0014-4835(92)90190-4
更新日期：1992-08-01 00:00:00
abstract：:Changes in the distribution of keratan sulfate in the anterior segment of developing ocular tissue were investigated histochemically and immunohistochemically using human eyes from 5 weeks gestation to 2 years after birth. Enzyme digestion methods with streptomyces hyaluronidase, chondroitinase and keratanase showed t...
journal_title：Experimental eye research
pub_type： 杂志文章
doi：10.1006/exer.1994.1018
更新日期：1994-03-01 00:00:00
abstract：:Rho GTPase regulated contractile signaling in the trabecular meshwork (TM) has been shown to modulate aqueous humor (AH) outflow and intraocular pressure (IOP). To explore whether elevated IOP, a major risk factor for primary open angle glaucoma (POAG) influences Rho GTPase signaling in the TM, we recorded AH outflow ...
journal_title：Experimental eye research
pub_type： 杂志文章
doi：10.1016/j.exer.2015.05.001
更新日期：2015-07-01 00:00:00
abstract：:Müller cells can completely repair retinal injury by acting as endogenous stem/progenitor cells in lower-order vertebrates. However, a safe and effective approach to activate progenitor potential of retinal Müller cells in higher-order vertebrates, which rarely re-enter the cell cycle, is a bottleneck problem. In the ...
journal_title：Experimental eye research
pub_type： 杂志文章
doi：10.1016/j.exer.2015.01.008
更新日期：2015-03-01 00:00:00
abstract：:Albino mice exposed to 1 X 10(-4) W cm-2 of UV radiation in the range 290-400 nm for 12 hr per day developed anterior lens opacities within 1-2 months after onset of the exposure. Histological changes demonstrated marked derangement of the lens epithelium. When the radiation was filtered with glass, eliminating radiat...
journal_title：Experimental eye research
pub_type： 杂志文章
doi：10.1016/s0014-4835(85)80011-7
更新日期：1985-10-01 00:00:00
abstract：:The development of a synthetic material allowing increased cellular adhesion and ingrowth would improve keratoprosthetic devices and requires an understanding of cell colonization processes. Interlamellar implantation of hydrophobic synthetic material may lead to poor corneal nutrition with subsequent necrosis. The pr...
journal_title：Experimental eye research
pub_type： 杂志文章
doi：10.1006/exer.1994.1193
更新日期：1994-01-01 00:00:00
abstract：:We describe a model of acute intraocular pressure (IOP) elevation in the mouse eye that induces reversible loss of inner retinal function associated with oxidative stress, glial cell activation and minimal loss of retinal ganglion cell (RGC) number. Young healthy mouse eyes recover inner retinal function within 7-days...
journal_title：Experimental eye research
pub_type： 杂志文章
doi：10.1016/j.exer.2015.03.006
更新日期：2015-12-01 00:00:00
abstract：:Jin H. Kinoshita has had a major role in fostering investigations on the molecular biology of the eye during his tenure as Scientific Director of the National Eye Institute (N.E.I.). His appreciation and support of molecular biology have been the basis for many advances in this area in the N.E.I. and have led to a fer...
journal_title：Experimental eye research
pub_type： 杂志文章,评审
doi：10.1016/0014-4835(90)90121-a
更新日期：1990-06-01 00:00:00
abstract：:The calcium-binding regulatory protein, calmodulin, was immunohistologically examined in feline rod outer segments. The peroxidase antiperoxidase technique was used for the immunohistological analysis and protein A-gold, to localize calmodulin electron-microscopically. Calmodulin was found to be located in the distal ...
journal_title：Experimental eye research
pub_type： 杂志文章
doi：10.1016/s0014-4835(87)80178-1
更新日期：1987-03-01 00:00:00
