Abstract：
:The effect of systemic hypoxia on the maintained firing rate (MFR) of single retinal ganglion cells has been measured in the cat at a constant luminance level. Systemic hypoxia was produced by reducing the percentage of oxygen in the respiratory mixture under forced ventilation so that arterial PCO2 and pH were constant. Extracellular recordings were obtained from both X and Y retinal ganglion cells before, during, and after systemic hypoxia, with each cell acting as its own control. The MFR was unaltered by arterial PO2 levels of greater than 45 mm Hg. However, at and below this level of hypoxia the MFR was reversibly increased in 67% of the cells tested. Whether or not this increase occurred was independent of cell type or location. For arterial PO2 values of 24 to 34 mm Hg the initial increase in MFR was followed by a decrease for these cells; for PO2 values of less than 24 mm Hg the MFR showed a large initial increase followed by a complete cessation of firing. The remaining 33% of cells displayed only reduced MFR during hypoxia. The results indicate that ganglion cell function may be drastically affected by hypoxia. This may be relevant to the visual loss of a variety of retinal disorders.
journal_name
Invest Ophthalmol Vis Scijournal_title
Investigative ophthalmology & visual scienceauthors
Alder VA,Constable IJsubject
Has Abstractpub_date
1981-09-01 00:00:00pages
450-6issue
3eissn
0146-0404issn
1552-5783journal_volume
21pub_type
杂志文章abstract：PURPOSE:In amblyopia, neuronal deficits deteriorate spatial vision including visual acuity, possibly because of a lack of use-dependent fine-tuning of afferents to the visual cortex during infancy; but temporal processing may deteriorate as well. METHODS:Temporal, rather than spatial, resolution was investigated in pa...
journal_title：Investigative ophthalmology & visual science
pub_type： 杂志文章
doi：10.1167/iovs.07-1604
更新日期：2009-11-01 00:00:00
abstract：PURPOSE:The chemokine receptor CX3CR1 is expressed by monocyte-derived dendritic cells (DCs) and macrophages. CX3CR1 mediates leukocyte migration and adhesion in homeostatic and inflammatory conditions. Mice lacking Cx3cr1 have altered distribution and function of DC subpopulations in some tissue microenvironments. The...
journal_title：Investigative ophthalmology & visual science
pub_type： 杂志文章
doi：10.1167/iovs.07-0953
更新日期：2008-04-01 00:00:00
abstract：PURPOSE:A pilot study of human neural retinal transplantation was undertaken to investigate three major issues: whether a safe surgical procedure could be devised for transplantation of neural retinal tissue into the subretinal space, whether the transplant would be accepted in the subretinal space, and whether an impr...
journal_title：Investigative ophthalmology & visual science
pub_type： 临床试验,杂志文章
doi：
更新日期：2000-09-01 00:00:00
abstract：Purpose:We compare the choroidal vascular area between Bietti crystalline dystrophy (BCD) patients with CYP4V2 mutations, retinitis pigmentosa (RP) patients with EYS mutations, and normal controls, and investigate the correlation between choroidal vascular area and associated parameters. Methods:This prospective case-...
journal_title：Investigative ophthalmology & visual science
pub_type： 杂志文章
doi：10.1167/iovs.17-21515
更新日期：2017-08-01 00:00:00
abstract：PURPOSE:To evaluate diurnal intraocular pressure (DIOP) among individuals with primary angle closure (PAC) or primary angle-closure suspect (PACS). Additionally, the hypothesis that greater DIOP fluctuation is related to smaller angle parameters was investigated. METHODS:Forty Caucasian newly referred untreated patien...
journal_title：Investigative ophthalmology & visual science
pub_type： 杂志文章
doi：10.1167/iovs.14-15385
更新日期：2015-05-01 00:00:00
abstract：PURPOSE:Inhibiting mechanistic target of rapamycin (mTOR) by pharmacological or genetic approaches can extend lifespan in mammals. The kinase activity of mTOR is controlled by upstream regulatory proteins and its subcellular localization. The purpose of this study was to characterize age-related alterations and functio...
journal_title：Investigative ophthalmology & visual science
pub_type： 杂志文章
doi：10.1167/iovs.14-14758
更新日期：2014-12-09 00:00:00
abstract：PURPOSE:Allopregnanolone is a neurosteroid and powerful modulator of neuronal excitability. The neuroprotective effects of allopregnanolone involve potentiation of γ-aminobutyric acid (GABA) inhibitory responses. Although glutamate excitotoxicity contributes to ganglion cell death in glaucoma, the role of GABA in glauc...
journal_title：Investigative ophthalmology & visual science
pub_type： 杂志文章
doi：10.1167/iovs.14-15624
更新日期：2014-11-18 00:00:00
abstract：PURPOSE:Recently, a segregation study in families with uveal and cutaneous melanoma identified 9q21 as a potential locus harboring a tumor-suppressor gene (TSG). One of the genes in this area, RASEF, was then analyzed as a candidate TSG, but lack of point mutations and copy number changes could not confirm this. In thi...
journal_title：Investigative ophthalmology & visual science
pub_type： 杂志文章
doi：10.1167/iovs.07-1135
更新日期：2008-04-01 00:00:00
abstract：:Chronic blepharitis has been a difficult disease to define either microbiologically or biochemically. Sterols from meibomian secretions of normal subjects and patients were analyzed, and important differences were observed. Based on analyses of these secretions, two significantly different (P less than 0.001) types of...
journal_title：Investigative ophthalmology & visual science
pub_type： 杂志文章
doi：
更新日期：1991-07-01 00:00:00
abstract：:Hypothesis-driven science is expected to result in a continuum of studies and findings along a discrete path. By comparison, serendipity can lead to new directions that branch into different paths. Herein, I describe a diverse series of findings that were motivated by hypotheses, but driven by serendipity. I summarize...
journal_title：Investigative ophthalmology & visual science
pub_type：
doi：10.1167/iovs.11-8330
更新日期：2011-09-29 00:00:00
abstract：PURPOSE:We examined changes of the central nervous system in patients with advanced primary open-angle glaucoma (POAG). METHODS:The clinical observational study included 15 patients with bilateral advanced POAG and 15 healthy normal control subjects, matched for age and sex with the study group. Retinal nerve fiber l...
journal_title：Investigative ophthalmology & visual science
pub_type： 杂志文章
doi：10.1167/iovs.12-9893
更新日期：2013-01-17 00:00:00
abstract：:The integrity of the RPE barrier function in retinal detachment was studied in vitro. The retinal pigment epithelium (RPE)-choroid tissue was isolated from cynomolgus monkey eyes with acute (less than 1 hr), subacute (1-2 weeks), and chronic (8-20 months) retinal detachments, and clamped between Ussing-type chambers. ...
journal_title：Investigative ophthalmology & visual science
pub_type： 杂志文章
doi：
更新日期：1987-11-01 00:00:00
abstract：PURPOSE:To determine and compare gene expression patterns in the whole retina and retinal ganglion cell layer (RGCL) in a rodent glaucoma model. METHODS:IOP was unilaterally elevated in Brown Norway rats (N = 26) by injection of hypertonic saline and monitored for 5 weeks. A cDNA microarray was used on whole retinas f...
journal_title：Investigative ophthalmology & visual science
pub_type： 杂志文章
doi：10.1167/iovs.09-4663
更新日期：2010-06-01 00:00:00
abstract：PURPOSE:To develop a method to isolate human iris microvascular endothelial cells (HIECs) for exploring their constitutive and inflammatory agent-modulated expression of intercellular adhesion molecules (ICAM)-1 and -2, vascular cell adhesion molecule (VCAM)-1, and E-selectin. METHODS:Endothelial cells from collagenas...
journal_title：Investigative ophthalmology & visual science
pub_type： 杂志文章
doi：
更新日期：2001-11-01 00:00:00
abstract：PURPOSE:To determine the effect of macrophage depletion on herpes simplex virus type (HAV)-1 replication in the eye and on the establishment of latency in trigeminal ganglia (TG) of immunized and ocularly infected mice. METHODS:BALB/c mice were immunized with five HSV-1 glycoprotein DNA genes or were sham immunized. T...
journal_title：Investigative ophthalmology & visual science
pub_type： 杂志文章
doi：10.1167/iovs.07-0894
更新日期：2007-12-01 00:00:00
abstract：:The predominant risk factor for the progression of glaucoma is an increase in IOP, mediated via a reduction in aqueous outflow through the conventional (trabecular meshwork and Schlemm's canal) outflow pathway. Current IOP lowering pharmacological strategies target the uveoscleral (nonconventional) outflow pathway or ...
journal_title：Investigative ophthalmology & visual science
pub_type： 杂志文章,评审
doi：10.1167/iovs.14-14515
更新日期：2014-08-14 00:00:00
abstract：:The life history of melanin and lipofuscin granules of human retinal pigment epithelium (RPE) was studied in 30 human eyes spanning nine decades of life. Autofluorescent granules in the cytoplasm of eye over 30 years of age were shown, ultrastructurally and through lipid solvent extraction, to be lipofuscin granules. ...
journal_title：Investigative ophthalmology & visual science
pub_type： 杂志文章
doi：
更新日期：1978-07-01 00:00:00
abstract：PURPOSE:The transdifferentiation of Tenon fibroblasts to myofibroblasts is a pivotal step in filtering bleb scarring. It is mediated by the cytokine TGF-beta, Rho-dependent contractility, and cell-matrix interactions in an interdependent fashion. HMG-CoA-reductase inhibitors (statins) have been shown to inhibit Rho-GTP...
journal_title：Investigative ophthalmology & visual science
pub_type： 杂志文章
doi：10.1167/iovs.07-1610
更新日期：2008-09-01 00:00:00
abstract：PURPOSE:Myopia is a common complex trait that affects up to 60% of some populations. Its development is influenced by multiple genes and environmental factors. PAX6 and SOX2 are genes with fundamental roles in ocular growth and development, and they have been linked with myopia in a recent linkage study. The authors in...
journal_title：Investigative ophthalmology & visual science
pub_type： 杂志文章
doi：10.1167/iovs.07-0231
更新日期：2007-10-01 00:00:00
abstract：PURPOSE:This study focuses on the identification of regulatory elements that contribute to lens-specific expression of the human CP49 gene within the 5'-flanking DNA sequences. METHODS:The DNA sequence upstream of the human CP49 coding region was subcloned as a set of 5' and 3' deletion series. The constructs were tra...
journal_title：Investigative ophthalmology & visual science
pub_type： 杂志文章
doi：10.1167/iovs.02-0162
更新日期：2003-01-01 00:00:00
abstract：PURPOSE:Heparanase and VEGF are related closely to angiogenesis in cancer. The purpose of our study was to evaluate the expression and correlation of heparanase and VEGF in hypoxia-induced retinal neovascularization. METHODS:C57BL/6 oxygen-induced retinopathy (OIR) mice and human retinal microvascular endothelial cell...
journal_title：Investigative ophthalmology & visual science
pub_type： 杂志文章
doi：10.1167/iovs.11-9144
更新日期：2012-10-03 00:00:00
abstract：PURPOSE:We sought to determine whether conjunctival ultraviolet autofluorescence (UVAF), a biomarker of outdoor light exposure, is associated with myopia. METHODS:We performed a cross-sectional study on Norfolk Island and recruited individuals aged ≥ 15 years. Participants completed a sun-exposure questionnaire and un...
journal_title：Investigative ophthalmology & visual science
pub_type： 杂志文章
doi：10.1167/iovs.11-8677
更新日期：2012-07-01 00:00:00
abstract：PURPOSE:To determine the relationship between optical coherence tomography (OCT) images of the retina and retinal substructure in vitro and in vivo. METHODS:In vitro, OCT images of human and bovine retina were acquired after sequential excimer laser ablation of the inner retinal layers. Measurements of bands in the OC...
journal_title：Investigative ophthalmology & visual science
pub_type： 杂志文章
doi：
更新日期：1999-09-01 00:00:00
abstract：:The comparison of intracellular pH (pHi) regulation between fresh (FBCE) and cultured (CBCE) bovine corneal endothelium was extended to HCO3- transport mechanisms. Upon introduction of CO2/HCO3- Ringer's solution, there was a small, sharp acidification followed by an alkalinization .09 and .18 pH U above the HCO3- fre...
journal_title：Investigative ophthalmology & visual science
pub_type： 杂志文章
doi：
更新日期：1992-10-01 00:00:00
abstract：PURPOSE:The loss of attentional visual field (AVF) has been linked to poor mobility and car crashes. We investigated the risk factors associated with a decrease in AVF over time among participants in the Salisbury Eye Evaluation Driving Study (SEEDS). METHODS:In a longitudinal cohort of 968 individuals ages 67 to 87, ...
journal_title：Investigative ophthalmology & visual science
pub_type： 杂志文章
doi：10.1167/iovs.11-8874
更新日期：2013-03-13 00:00:00
abstract：PURPOSE:We tested the hypotheses that the mismatch between the clinical disc margin (CDM) and Bruch's membrane opening (BMO) is a function of BMO area (BMOA) and is affected by the presence of glaucoma. METHODS:A total of 45 normal eyes (45 subjects) and 53 glaucomatous eyes (53 patients) were enrolled and underwent r...
journal_title：Investigative ophthalmology & visual science
pub_type： 杂志文章
doi：10.1167/iovs.15-18382
更新日期：2016-03-01 00:00:00
abstract：PURPOSE:To assess the thickness and surface area of porcine sclera. METHODS:One hundred twenty-eight porcine globes were sectioned from the center of the cornea to the region of the optic nerve. Photographs of the sectioned sclera including a millimeter scale were taken. Photographic slides were projected onto blank p...
journal_title：Investigative ophthalmology & visual science
pub_type： 杂志文章
doi：
更新日期：2002-08-01 00:00:00
abstract：PURPOSE:There is a correlation between cell volume changes and changes in the rate of aqueous humor outflow; agents that decrease trabecular meshwork (TM) cell volume increase the rate of aqueous humor outflow. This study investigated the effects of the nitric oxide (NO)-independent activators of soluble guanylate cycl...
journal_title：Investigative ophthalmology & visual science
pub_type： 杂志文章
doi：10.1167/iovs.08-3127
更新日期：2009-07-01 00:00:00
abstract：PURPOSE:To determine how the different stages of retinal processing change after photoreceptor degeneration in rabbits carrying the Pro347Leu rhodopsin mutation (Tg rabbits). METHODS:Cone electroretinograms (ERGs) were elicited by 150-ms duration stimuli from 13 Tg rabbits at 12 and 24 weeks of age. The ERG recordings...
journal_title：Investigative ophthalmology & visual science
pub_type： 杂志文章
doi：10.1167/iovs.11-7611
更新日期：2011-09-29 00:00:00
abstract：Purpose:Individuals with developmental dyslexia suffer not only from reading problems as more general motor deficits can also be observed in this patient group. Both psychometric clinical tests and objective eyetracking methods suggest that unstable binocular fixation may contribute to reading problems. Because binocul...
journal_title：Investigative ophthalmology & visual science
pub_type： 杂志文章
doi：10.1167/iovs.16-21305
更新日期：2017-12-01 00:00:00
