Abstract：
:The purpose of this study was to correlate potential mechanisms with site(s) of action for TNPA-induced ocular hypotension. In response to R(-)-2, 10, 11-trihydroxy-N-propyl-noraporphine hydrobromide (TNPA, 75 microg), a D2 dopamine receptor agonist, the intraocular pressure decreased by 4.5 and 8 mm Hg at 1 and 2 hr, respectively, as measured by pneumatonometry. The levels of norepinephrine in aqueous humor, as determined by high performance liquid chromatography with electrochemical detection, were reduced by 38% and 79% at 1 and 2 hr, respectively, following topical application of TNPA (75 microg). Following pretreatment with raclopride (750 microg), a D2 receptor antagonist, and a subsequent challenge with TNPA (75 microg), the depression of intraocular pressure and levels of norepinephrine induced by TNPA (75 microg, 2 hr) were antagonized. In order to examine sites of action, immunohistochemistry of D2 dopamine receptors was performed in the ciliary body of normal and sympathetically denervated rabbits utilizing a goat polyclonal D2 receptor IgG and anti-goat IgG-FITC. Results from immunolocalization experiments demonstrated that D2 receptors are present on postganglionic sympathetic nerves in the ciliary body of normal rabbits but minimally detectable in that of sympathectomized rabbits. It is concluded that immunohistochemical identification of D2 receptors in the ciliary body associated with the suppression of aqueous norepinephrine levels by topical application of the D2 receptor agonist, TNPA, provide strong evidence of prejunctional (neuronal) site of action of TNPA. Antagonism of TNPA-induced ocular hypotension by raclopride coupled with the immunohistochemical and norepinephrine data suggest that D2 dopamine receptors are located on postganglionic sympathetic neurons in the ciliary body.
journal_name
Exp Eye Resjournal_title
Experimental eye researchauthors
Chu E,Chu TC,Potter DEdoi
10.1006/exer.1999.0734keywords:
subject
Has Abstractpub_date
1999-12-01 00:00:00pages
611-6issue
6eissn
0014-4835issn
1096-0007pii
S0014-4835(99)90734-0journal_volume
69pub_type
杂志文章abstract：:Mammalian lens development involves cell-cell and cell-ECM interactions. As integrins are a major family of cell adhesion molecules, we examined the expression patterns of several integrin subunits (alpha3A, alpha3B, alpha6A, alpha6B, beta1 and beta4) during rat lens development. RT-PCR, in situ hybridisation, immunof...
journal_title：Experimental eye research
pub_type： 杂志文章
doi：10.1016/j.exer.2005.02.005
更新日期：2005-09-01 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：:This study presents a computational model of the growth of the normal human lens and the induction of spoke-like cortical cataract in the aging lens. The anterior lens is modelled as a 2-D disk with a circumferential germinative zone. Lens cortical fibre cells in the same generation cover the surface in three identica...
journal_title：Experimental eye research
pub_type： 杂志文章
doi：10.1006/exer.2000.0883
更新日期：2000-09-01 00:00:00
abstract：:In addition to its role as an inhibitor of urokinase plasminogen activator (uPA), plasminogen activator inhibitor-1 (PAI-1) is hypothesized to regulate epithelial cell adhesion and migration. We have previously reported that PAI-1 may be an important regulatory factor of the uPA system in cornea. The purpose of this s...
journal_title：Experimental eye research
pub_type： 杂志文章
doi：10.1016/j.exer.2004.06.006
更新日期：2005-01-01 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：:Adenosine, produced from the decomposition of adenosine triphosphate, is believed to provide protective effects during ischemia. On the other hand, adenosine metabolites may serve as precursors for oxygen free radical formation. The time course of formation of adenosine and its purine metabolites was studied during re...
journal_title：Experimental eye research
pub_type： 杂志文章
doi：10.1006/exer.1997.0391
更新日期：1997-12-01 00:00:00
abstract：:γ-secretase inhibitor has been shown to promote intestinal goblet cell differentiation. We now demonstrated that the in vitro addition of γ-secretase inhibitor in the culture of human conjunctival epithelial cells significantly promoted the differentiation of conjunctival goblet cells with typical droplet-like phenoty...
journal_title：Experimental eye research
pub_type： 杂志文章
doi：10.1016/j.exer.2014.04.001
更新日期：2014-06-01 00:00:00
abstract：:Retinal pigment epithelial (RPE) cell-mediated extracellular matrix contraction is believed to contribute to developing proliferative vitreoretinopathy. It has been shown that platelet-derived growth factor (PDGF) and its intracellular signaling pathway, including mitogen-activated protein kinase (MAPK) and phosphatid...
journal_title：Experimental eye research
pub_type： 杂志文章
doi：10.1016/j.exer.2005.08.014
更新日期：2006-03-01 00:00:00
abstract：:The aim of the study was to determine anatomical and growth factor profiles in patients with clinically significant macular oedema (CSMO) undergoing pars plana vitrectomy (PPV). Twenty patients with moderate nonproliferative diabetic retinopathy (NPDR) with persistent CSMO underwent PPV. Patients had baseline and post...
journal_title：Experimental eye research
pub_type： 杂志文章
doi：10.1016/j.exer.2005.10.002
更新日期：2006-05-01 00:00:00
abstract：:Crystalline lenses excised from 5-7-month-old rabbits and pigs were extracted for lipids with chloroform/methanol, 2/1 using the Folch method. The extracted crude lipids were analyzed at 202 MHz by 31P-NMR spectroscopy. Twelve membrane phospholipids were detected. Both rabbit and pig phospholipid profiles contained ph...
journal_title：Experimental eye research
pub_type： 杂志文章
doi：10.1016/0014-4835(90)90207-b
更新日期：1990-03-01 00:00:00
abstract：:Collagen was isolated from bovine cornea and tested for reactivity towards platelets and IgG-coated polystyrene latex particles. The corneal collagen caused a dose- and temperature-dependent platelet aggregation in all human platelet-rich plasmas studied. As little as 0 . 31 micrograms of purified corneal collagen cou...
journal_title：Experimental eye research
pub_type： 杂志文章
doi：10.1016/0014-4835(83)90122-7
更新日期：1983-03-01 00:00:00
abstract：:In this study, we examined calcium-mediated degradation of a neurofilament protein (NFP), and autolytic activation of calpain in Lewis rat optic nerve in vitro. After incubation with calcium, homogenized optic nerve samples were analysed by SDS-PAGE in association with ECL immunoblot techniques. 68 kD NFP, calpain, an...
journal_title：Experimental eye research
pub_type： 杂志文章
doi：10.1006/exer.1997.0286
更新日期：1997-07-01 00:00:00
abstract：:Tears serve as a viable diagnostic fluid with advantages including less invasive sample to collect and less complex to prepare for analysis. Several water-soluble and fat-soluble vitamins were detected and quantified in human tears and compared with blood serum levels. Samples from 15 family pairs, each pair consistin...
journal_title：Experimental eye research
pub_type： 杂志文章
doi：10.1016/j.exer.2016.12.007
更新日期：2017-02-01 00:00:00
abstract：:Mice are now routinely utilized in studies of aqueous humor outflow dynamics. In particular, conventional aqueous outflow facility (C) is routinely measured via perfusion of the aqueous chamber by a number of laboratories. However, in mouse eyes perfused ex-vivo, values for C are variable depending upon whether the pe...
journal_title：Experimental eye research
pub_type： 杂志文章
doi：10.1016/j.exer.2017.08.011
更新日期：2017-11-01 00:00:00
abstract：:Pericytes exert an important influence on the control of retinal blood flow; however, little is known regarding the molecular basis of retinal pericyte excitability. The purpose of this study was to elucidate the signaling pathway of how prostacyclin (PGI2), an important endogenous regulator of retinal blood flow, sti...
journal_title：Experimental eye research
pub_type： 杂志文章
doi：10.1016/j.exer.2006.07.011
更新日期：2006-12-01 00:00:00
abstract：:It has long been assumed that unstimulated tears are more thoroughly equilibrated with epithelial secretions than stimulated tears, since they are in contact with tarsal, bulbar and corneal surfaces for longer. It was also believed from results with model solutions that soluble mucin is responsible for the observed su...
journal_title：Experimental eye research
pub_type： 杂志文章
doi：10.1006/exer.1998.0600
更新日期：1999-02-01 00:00:00
abstract：:There is currently no available method to efficiently deliver proteins across the plasma membrane of photoreceptor or retinal pigment epithelium (RPE) cells in vivo. Thus, current clinical application of recombinant proteins in ophthalmology is limited to the use of proteins that perform their biological function extr...
journal_title：Experimental eye research
pub_type： 杂志文章
doi：10.1016/j.exer.2016.02.009
更新日期：2016-04-01 00:00:00
abstract：:We aim to determine whether lymphatic drainage from the eye changes with age. Using quantitative photoacoustic tomography, groups of young and older mice were studied in the live state. 10 CD-1 mice of 2-3 months (5M/5F) were studied in addition to 13 older mice of 12-13 months (6M/7F). In each of 23 mice, near-infrar...
journal_title：Experimental eye research
pub_type： 杂志文章
doi：10.1016/j.exer.2020.108029
更新日期：2020-05-01 00:00:00
abstract：:We examined the expression of mGlu2/3 metabotropic glutamate receptors in the retina of the goldfish Carassius auratus. mGlu2/3 receptors were expressed in all retinal layers internal to the photoreceptor layer, particularly in the outer and inner nuclear layers. Although the goldfish brain is able to tolerate prolong...
journal_title：Experimental eye research
pub_type： 杂志文章
doi：10.1016/j.exer.2006.11.008
更新日期：2007-03-01 00:00:00
abstract：:Peroxisomes were localized in the head of wild-type and mutant strains of Drosophila melanogaster by use of a cytochemical method for the demonstration of D-amino acid oxidase activity. With similar techniques we had found previously that vertebrate photoreceptors have few, if any, bodies with cytochemically demonstra...
journal_title：Experimental eye research
pub_type： 杂志文章
doi：10.1016/0014-4835(90)90092-9
更新日期：1990-11-01 00:00:00
abstract：:Diabetic retinopathy shares many characteristics features of a low grade chronic inflammatory disease. Its progression resists arrest when good metabolic control is re-established after a period of poor metabolic control, suggesting a 'metabolic memory' phenomenon. The aim of this study is to investigate the effect of...
journal_title：Experimental eye research
pub_type： 杂志文章
doi：10.1016/j.exer.2010.02.006
更新日期：2010-05-01 00:00:00
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journal_title：Experimental eye research
pub_type： 杂志文章
doi：10.1016/j.exer.2017.07.006
更新日期：2017-09-01 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：:Argon laser energy was applied to the trabecular meshwork of pigmented rabbits in an attempt to develop an animal model of 'glaucoma'. Laser energy was varied to determine the optimal level needed to produce sustained ocular hypertension. An initial response of ocular hypertension followed by hypotension was observed ...
journal_title：Experimental eye research
pub_type： 杂志文章
doi：10.1016/0014-4835(86)90067-9
更新日期：1986-12-01 00:00:00
abstract：:SPARC (secreted protein acidic and rich in cysteine) is a matricellular protein that regulates cellular adhesion and proliferation. In this report, we show that SPARC protein is restricted to epithelial cells of the murine lens and ends abruptly at the equatorial bow region where lens fiber differentiation begins. SPA...
journal_title：Experimental eye research
pub_type： 杂志文章
doi：10.1006/exer.1998.0608
更新日期：1999-03-01 00:00:00
abstract：:Ischemic preconditioning (IPC) protects the rat retina against the injury that ordinarily follows severe ischemia. We showed previously that release of adenosine and de novo protein synthesis were required for IPC protection. The mechanisms of IPC were studied in the rat retina by examining the signal transduction med...
journal_title：Experimental eye research
pub_type： 杂志文章
doi：10.1006/exer.2000.0843
更新日期：2000-06-01 00:00:00
abstract：:Rhegmatogenous retinal detachment is by far the most common indication for retinal surgery and a major cause of severe vision loss. Increased levels of glutamate found in the vitreous of human patients and persistent remodeling, even after reattachment, suggest substantial neurochemical, functional and anatomical chan...
journal_title：Experimental eye research
pub_type： 杂志文章
doi：10.1016/j.exer.2012.02.009
更新日期：2012-04-01 00:00:00
abstract：:Elevated permeability of retinal endothelial cells (REC), as observed in diabetic retinopathy (DR), is induced by extended exposure to ≥25 ng/ml vascular endothelial growth factor A165 (VEGF165) for up to 3 d and this effect is more pronounced when equimolar amounts of basic fibroblast growth factor (bFGF) and insulin...
journal_title：Experimental eye research
pub_type： 杂志文章
doi：10.1016/j.exer.2013.07.018
更新日期：2013-10-01 00:00:00
abstract：:In a previous investigation into the fate of fluorescently labelled antigen (Ag) injected into the anterior chamber (AC) of the rat eye, a large number of Ag+ cells were noted in the conventional and non-conventional aqueous humour outflow pathways together with the external limbus. The aim of this study was to invest...
journal_title：Experimental eye research
pub_type： 杂志文章
doi：10.1016/j.exer.2004.06.009
更新日期：2004-10-01 00:00:00
abstract：:The purpose of this study was to determine whether trans-scleral pressure affects scleral solute permeability by altering scleral thickness or hydration, and to investigate the sustained release delivery of dexamethasone. Scleral sections from donor human globes were mounted for in vitro flux studies. Scleral thicknes...
journal_title：Experimental eye research
pub_type： 杂志文章
doi：10.1016/s0014-4835(03)00211-2
更新日期：2004-03-01 00:00:00
