Abstract:
PURPOSE:The authors examined the muscarinic acetylcholine receptor (mAChR) subtypes in rabbit corneal epithelial and endothelial cells and in subcellular fractions of these cell types. A Chinese hamster ovary (CHO) cell line (nontransfected CHO K1), expected to be a negative control, also was investigated. METHODS:Whole cell homogenate and subcellular fractions were labeled with the covalent-binding, mAChR-specific ligand [3H]propylbenzilylcholine mustard ([3H]PrBChM) and were analyzed by a combination of sodium dodecyl sulfate-polyacrylamide gel electrophoresis, or SDS-PAGE, and autoradiography. RESULTS:A pattern of multiple PrBChM-binding proteins was detected in homogenates of corneal epithelial and endothelial cells and, surprisingly, in the CHO cells. Ligand binding to all of these proteins is inhibited by the mAChR antagonists atropine sulfate and quinculidinyl benzilate. The sizes of four of the labeled protein bands are the same as the molecular masses deduced from mAChR sequence data for subtypes m3, m4, m5, and either m1 or m2. One band of 47 kd, smaller than any reported sequence, was also observed. Two of the [3H]PrBChM-binding proteins, one at 59 to 62 kd (corresponding to m5 in size) and another at 47 kd, clearly were present when highly purified nuclei were analyzed. CONCLUSIONS:The presence of multiple mAChR-like proteins at low concentrations in these disparate cell types suggests the possibility of a more general regulatory role for this type of receptor than was considered previously. Combined with other reports, the identification of proteins with the characteristics of mAChRs in purified nuclei adds support to data indicating the likelihood of G-protein-coupled signaling across the nuclear envelope.
journal_name
Invest Ophthalmol Vis Scijournal_title
Investigative ophthalmology & visual scienceauthors
Lind GJ,Cavanagh HDsubject
Has Abstractpub_date
1995-07-01 00:00:00pages
1492-507issue
8eissn
0146-0404issn
1552-5783journal_volume
36pub_type
杂志文章abstract:Purpose:Treatment success in clinical trials for AMD would ideally be aligned to measurable performance in visual tasks rather than imperceptible changes on clinical charts. We test the hypothesis that patients with dry AMD perform worse than visually healthy peers on computer-based surrogates of "real-world" visual se...
journal_title:Investigative ophthalmology & visual science
pub_type: 杂志文章
doi:10.1167/iovs.16-21122
更新日期:2017-03-01 00:00:00
abstract::The morphology of the apical surface of rabbit retinal pigment epithelium was studied by scanning electron microscopy from the first minute to several hours after making small nonrhegmatogenous retinal detachments (blebs). From 0 to 5 min, there were only slight changes in the homogeneous, dense mat of filamentous mic...
journal_title:Investigative ophthalmology & visual science
pub_type: 杂志文章
doi:
更新日期:1986-12-01 00:00:00
abstract:PURPOSE:To develop a new test of activities of daily living (ADLs) appropriate for the low-vision population: the Melbourne Low-Vision ADL Index (MLVAI). METHODS:The MLVAI was designed as a desk-based clinical assessment, comprising 18 observed items on complex ADLs in part (a) and 9 questions on broad self-care ADLs ...
journal_title:Investigative ophthalmology & visual science
pub_type: 杂志文章
doi:
更新日期:2001-05-01 00:00:00
abstract:PURPOSE:To examine human corneal morphology and nerve recovery 5 years after photorefractive keratectomy (PRK). METHODS:Fourteen eyes of 14 patients (ages, 27-53 years) who underwent 6-mm diameter PRK for low to moderate myopia (spherical equivalent [SE] -2.5 to -8.0 D) were examined once 5 years after surgery. Nine h...
journal_title:Investigative ophthalmology & visual science
pub_type: 杂志文章
doi:10.1167/iovs.02-0247
更新日期:2003-03-01 00:00:00
abstract:Purpose:To assess changes in Schlemm's canal (SC), intraocular pressure (IOP), and autonomic nervous system activity in healthy individuals after performing the water-drinking test (WDT). Methods:The SC area (SCAR), trabecular meshwork (TM) thickness, IOP, high frequency (HF) of heart rate variability (HRV), heart rat...
journal_title:Investigative ophthalmology & visual science
pub_type: 杂志文章
doi:10.1167/iovs.18-23909
更新日期:2018-07-02 00:00:00
abstract:PURPOSE:The association of age and blood pressure (BP) with retinal vessel change is widely reported, with inverse relationships between retinal arteriolar and venular diameter and increasing age and elevated BP. No previous studies have dissected the separate effects of age and BP on the diameter of retinal vessels. ...
journal_title:Investigative ophthalmology & visual science
pub_type: 杂志文章
doi:10.1167/iovs.06-0893
更新日期:2007-02-01 00:00:00
abstract:PURPOSE:To determine the effects of enzymes on mammalian vitreous gel and to thus infer the structural roles of hyaluronan and chondroitin sulfate in the gel. METHODS:The wet weights of bovine vitreous gels were compared before and after incubation with Streptomyces hyaluronan lyase, chondroitin ABC lyase, testicular ...
journal_title:Investigative ophthalmology & visual science
pub_type: 杂志文章
doi:
更新日期:1999-09-01 00:00:00
abstract:PURPOSE:To investigate the effect of retinal eccentricity on the phenomenon of dichoptic suppression of the mfVEP amplitude and to examine the relationship between the degree of simulated unilateral visual impairment and the possible release of dichoptic suppression in the contralateral eye. METHOD:Eight subjects with...
journal_title:Investigative ophthalmology & visual science
pub_type: 杂志文章
doi:10.1167/iovs.10-5769
更新日期:2010-12-01 00:00:00
abstract:PURPOSE:Migration of Müller glial cells is enhanced in proliferative retinopathies, but the mechanisms involved are ill defined. Sphingosine-1-phosphate (S1P) is a bioactive sphingolipid synthesized by sphingosine kinase (SphK), which promotes proliferation, migration, and inflammation, acting as an intracellular media...
journal_title:Investigative ophthalmology & visual science
pub_type: 杂志文章
doi:10.1167/iovs.14-16195
更新日期:2015-09-01 00:00:00
abstract:PURPOSE:Because immune rejection is likely to be a major barrier to successful retinal transplantation, it is important to determine whether immune privilege for allogeneic retinal grafts is a feature of the subretinal space and vitreous cavity. METHODS:Newborn neural retinas of C57BL/6 mice were implanted into the su...
journal_title:Investigative ophthalmology & visual science
pub_type: 杂志文章
doi:
更新日期:1993-11-01 00:00:00
abstract:PURPOSE:To investigate the effect of varying levels of ocular surface stimulation on the timing and amplitude of the blink and tear secretion. METHODS:Following instillation of fluorescein dye, increasing levels of air flow were directed toward the central corneas of 10 healthy subjects. Interblink interval (IBI), tea...
journal_title:Investigative ophthalmology & visual science
pub_type: 杂志文章
doi:10.1167/iovs.14-16313
更新日期:2015-07-01 00:00:00
abstract:PURPOSE:To reconstruct the role played by vascular endothelium in the elevation of circulating von Willebrand factor (vWf) in diabetic patients with microangiopathy and, specifically, to determine whether storage and synthesis of vWf is altered in diabetic retinal vessels. METHODS:Trypsin digests were prepared from re...
journal_title:Investigative ophthalmology & visual science
pub_type: 杂志文章
doi:
更新日期:1994-02-01 00:00:00
abstract:PURPOSE:Early visual defects in degenerative diseases such as retinitis pigmentosa (RP) may arise from phased remodeling of the neural retina. The authors sought to explore the functional expression of ionotropic (iGluR) and group 3, type 6 metabotropic (mGluR6) glutamate receptors in late-stage photoreceptor degenerat...
journal_title:Investigative ophthalmology & visual science
pub_type: 杂志文章
doi:10.1167/iovs.07-0032
更新日期:2007-07-01 00:00:00
abstract:PURPOSE:Methylenetetrahydrofolate reductase (Mthfr) is a key enzyme in homocysteine-methionine metabolism. We investigated Mthfr expression in retina and asked whether mild hyperhomocysteinemia, due to Mthfr deficiency, alters retinal neurovascular structure and function. METHODS:Expression of Mthfr was investigated a...
journal_title:Investigative ophthalmology & visual science
pub_type: 杂志文章
doi:10.1167/iovs.14-16190
更新日期:2015-04-01 00:00:00
abstract::The retinal pigment epithelium (RPE)-choroid was isolated from cynomolgus monkey eyes with experimental retinal detachments and the volume flow was determined in vitro using Ussing-type chambers. With zero pressure difference across the membrane, retina-to-choroid volume flow was 5.0 microliter/hr/cm2 in eyes with sub...
journal_title:Investigative ophthalmology & visual science
pub_type: 杂志文章
doi:
更新日期:1988-11-01 00:00:00
abstract:Purpose:To evaluate the potential of lactoferrin (Lf) as a diagnostic biomarker for ocular diseases using a meta-analytic approach. Methods:All original studies reporting an estimate of the average Lf concentration in healthy subjects and those affected by ocular diseases were searched up to March 2020. The DerSimonia...
journal_title:Investigative ophthalmology & visual science
pub_type: 杂志文章
doi:10.1167/iovs.61.12.9
更新日期:2020-10-01 00:00:00
abstract:PURPOSE:To demonstrate the application of multiphoton fluorescence (MF) and second harmonic generation (SHG) microscopy for ex vivo characterization of the structural alterations of human corneas due to keratoconus. METHODS:Buttons of keratoconic corneas derived from penetrating keratoplasty were sent for structural a...
journal_title:Investigative ophthalmology & visual science
pub_type: 杂志文章
doi:10.1167/iovs.06-0386
更新日期:2006-12-01 00:00:00
abstract:PURPOSE:Identification of causative mutations for retinal blinding disorders is often limited by restricted understanding of gene expression and underlying molecular mechanisms that trigger degenerative processes. This study was conducted to develop a catalog of canine retina-expressed genes that would provide a unique...
journal_title:Investigative ophthalmology & visual science
pub_type: 杂志文章
doi:10.1167/iovs.05-1463
更新日期:2006-06-01 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::Experimental esotropia was produced surgically in infant rhesus monkeys (Macaca mulatta) for brief periods of time. Electrophysiological studies of the visual cortex showed that esotropia of only 2 weeks duration in an infant monkey is sufficient to cause a marked shift of dominance in favor of the fixating eye and to...
journal_title:Investigative ophthalmology & visual science
pub_type: 杂志文章
doi:
更新日期:1979-05-01 00:00:00
abstract:PURPOSE:To determine whether resolvin E1 (RvE1), an endogenous oxygenation product of eicosapentaenoic acid (EPA), induces increases in migration in human corneal epithelial cells (HCECs) and to identify signal pathways mediating this response. METHODS:Migration was measured with the scratch wound assay. Western blot ...
journal_title:Investigative ophthalmology & visual science
pub_type: 杂志文章
doi:10.1167/iovs.09-4468
更新日期:2010-11-01 00:00:00
abstract::Quantitative autoradiography was used to study the incorporation of 3H-thymidine into the retina of albino rats following in vivo exposure to 300-nm radiation. Relative to background labeling in unexposed eyes, there was 8-20 times as much label per unit area in the outer nuclear layer, inner nuclear layer, and gangli...
journal_title:Investigative ophthalmology & visual science
pub_type: 杂志文章
doi:
更新日期:1985-03-01 00:00:00
abstract:PURPOSE:To investigate the effect of ABCA4 mutation status on lipofuscin-related quantitative autofluorescence (qAF) in humans and on bisretinoid accumulation in mice. METHODS:Genotyped parents (n = 26; age 37-64 years) of patients with biallelic ABCA4-related retinopathy underwent in-depth retinal phenotyping includi...
journal_title:Investigative ophthalmology & visual science
pub_type: 杂志文章
doi:10.1167/iovs.15-17629
更新日期:2015-12-01 00:00:00
abstract:PURPOSE:To characterize the features and possible mechanism of plus disease in the mouse oxygen-induced retinopathy (OIR) model for retinopathy of prematurity. METHODS:Wild-type and Adam (A Disintegrin And Metalloproteinase) knockout mice were exposed to 75% oxygen from postnatal day 7 to 12 (P7 to P12) (hyperoxia), t...
journal_title:Investigative ophthalmology & visual science
pub_type: 杂志文章
doi:10.1167/iovs.12-11492
更新日期:2013-08-07 00:00:00
abstract::Parallel studies of the ionic balance and membrane permeability characteristics of normal human lenses were carried out in three countries (USA, England and Italy). Similar age-related changes were found in each laboratory. The lens membrane potential and resistance declined markedly with age while internal Na+ and fr...
journal_title:Investigative ophthalmology & visual science
pub_type: 杂志文章
doi:
更新日期:1989-08-01 00:00:00
abstract:PURPOSE:To evaluate changes in the multifocal electroretinogram (mfERG) in patients with neovascular age-related macular degeneration (nAMD) undergoing ranibizumab treatment. METHODS:This was an observational, longitudinal, prospective study. Treatment-naive patients with nAMD who met the inclusion and exclusion crite...
journal_title:Investigative ophthalmology & visual science
pub_type: 杂志文章
doi:10.1167/iovs.10-6588
更新日期:2011-06-01 00:00:00
abstract:PURPOSE:Human leukocyte antigen (HLA) polymorphisms have been associated with the development of autoimmune diseases. In uveal melanoma, a high expression of HLA classes I and II, and infiltration with lymphocytes and macrophages are associated with a bad prognosis. Inflammation has an important role in this malignancy...
journal_title:Investigative ophthalmology & visual science
pub_type: 杂志文章
doi:10.1167/iovs.11-8901
更新日期:2012-05-04 00:00:00
abstract:PURPOSE:To investigate the long-term effects of transient ligature of the ophthalmic vessels (LOV) on the inner and outer retina as well as on retinotectal projection, and whether brimonidine (BMD) has protective effects. METHODS:In adult rats, the left eye was subjected to 90 minutes of LOV. One hour before ischemia,...
journal_title:Investigative ophthalmology & visual science
pub_type: 杂志文章
doi:10.1167/iovs.05-0392
更新日期:2005-10-01 00:00:00
abstract::The morphologic effects on rabbit corneal endothelium of several common ophthalmic vehicle constituents were examined following subconjunctival administration. Profound dose-dependent changes consisting of intercellular vacuolization and thickening of the endothelial layer were noted within 1 day following administrat...
journal_title:Investigative ophthalmology & visual science
pub_type: 杂志文章
doi:
更新日期:1986-04-01 00:00:00
abstract:Purpose:Light-emitting diodes that emit high-intensity blue light are associated with blue-light hazard. Here, we report that blue light disturbs circadian rhythms by interfering with the clock gene in the suprachiasmatic nucleus (SCN) and that suppression of blue light at night ameliorates metabolic abnormalities by c...
journal_title:Investigative ophthalmology & visual science
pub_type: 临床试验,杂志文章
doi:10.1167/iovs.19-27195
更新日期:2019-09-03 00:00:00