Abstract:
:We have previously shown that corticotropin-releasing hormone plays an important proinflammatory role in the induction of experimental autoimmune uveoretinitis. In this study, we examined the role of apoptosis in the destruction of the retina during experimental autoimmune uveoretinitis, and the role of corticotropin-releasing hormone as a local regulator of Fas and Fas Ligand expression in this condition. We evaluated apoptosis by the terminal deoxynucleotidyl transferase dUTP nick end labeling method and Fas and Fas Ligand presence by immunohistochemistry. We examined formalin-fixed, paraffin-embedded eye sections from female Lewis rats or B10.A mice immunized with the major pathogenetic epitope (R16 peptide) of the interphotoreceptor retinoid-binding protein. Female B10.A mice similarly immunized were treated with intraperitoneal injections of the rabbit anti-corticotropin-releasing hormone antibody TS-2 or nonimmune rabbit serum. The percentage of retinal cells undergoing apoptosis and the expression of Fas and Fas Ligand were increased in inflamed retinas in immunized Lewis rats and B10.A mice, compared to controls. Retinas from immunized B10.A mice treated with anti-corticotropin-releasing hormone antibody showed significantly lower apoptosis and Fas and Fas Ligand expression than placebo-treated animals. In conclusion, retinal cells in experimental autoimmune uveoretinitis undergo apoptosis associated with concurrent upregulation of Fas and Fas Ligand. The local presence of corticotropin-releasing hormone appears to be of pivotal importance in this process.
journal_name
Exp Eye Resjournal_title
Experimental eye researchauthors
Poulaki V,Mitsiades N,Mastorakos G,Caspi RR,Chrousos GP,Bouzas Edoi
10.1006/exer.2001.0992keywords:
subject
Has Abstractpub_date
2001-06-01 00:00:00pages
623-9issue
6eissn
0014-4835issn
1096-0007pii
S0014-4835(01)90992-3journal_volume
72pub_type
杂志文章abstract::The DBA/2 mouse has been used as a model for spontaneous secondary glaucoma. We attempted to determine the in vivo time course and spatial distribution of retinal ganglion cells (RGCs) undergoing apoptotic death in DBA/2 mice. Female DBA/2 mice, 3, 9-10, 12, 15, and 18 months of age, received intravitreal injections o...
journal_title:Experimental eye research
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abstract::The ocular lens is surrounded by the lens capsule, which is an elastic and unusually thick basal membrane. Anionic sites are thought to be responsible for charge-selective permeability barriers in basal membranes. We have used cationic colloidal gold as a tracer for anionic binding sites to investigate the distributio...
journal_title:Experimental eye research
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doi:10.1006/exer.2000.0952
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abstract::Retinal arrestin is known to participate in the quenching of phototransduction through binding to light-activated and phosphorylated rhodopsin. Recently, a splice variant of retinal arrestin was identified in bovine photoreceptors which could bind unphosphorylated photoactive rhodopsin. In this report, a splice varian...
journal_title:Experimental eye research
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doi:10.1006/exer.1996.0069
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abstract::The objective of this study was to determine the cellular localization of P2Y(2) receptor gene expression in rabbit and primate ocular tissues using the technique of non-isotopic in situ hybridization. Fresh frozen whole eye from a New Zealand White rabbit and whole eye and eyelid from a rhesus macaque were cut into 5...
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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
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abstract::The purpose of this study was to describe the distribution of Muller cell within the peripapillary retinal nerve fiber layer (RNFL) in human eyes. Eleven unpaired normal postmortem eyes were recruited into this study. Each eye was sectioned using the "umbrella technique" to obtain a concentric peripapillary ring cente...
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abstract::Previous studies have suggested that abnormal corneal wound healing in patients after photorefractive keratectomy (PRK) is associated with the appearance of myofibroblasts in the stroma between two and four weeks after surgery. The purpose of this study was to examine potential myofibroblast progenitor cells that migh...
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abstract::Evidence is presented that alpha-crystallin isolated at 37 degrees C exists as a species, alpha m, which has a minimum molecular weight of about 320000 and a sedimentation coefficient of about 12 S. The amino acid composition, subunit distribution, near- and far-UV CD spectra and immunochemical properties were identic...
journal_title:Experimental eye research
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abstract::There are few previous estimates of the size of the human lens epithelium. In this study the lens epithelium is measured by specular reflex photography with a macro camera. The results are corrected for cornea magnification. One hundred subjects were studied ranging in age from 11 to 75 and including 20 diabetics and ...
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journal_title:Experimental eye research
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journal_title:Experimental eye research
pub_type: 杂志文章
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更新日期:1994-07-01 00:00:00
abstract::The current study investigates the cellular events which trigger activation of proapoptotic Bcl-2-associated × protein (Bax) in retinal cell death induced by all-trans-retinal (atRAL). Cellular events which activate Bax, such as DNA damage by oxidative stress and phosphorylation of p53, were evaluated by immunochemica...
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doi:10.1016/j.exer.2014.04.003
更新日期:2014-06-01 00:00:00
abstract::Murine macrophages treated with TGF-beta2 are capable of inducing anterior chamber-associated immune deviation (ACAID), and these macrophages are characterized by impaired IL-12 production and CD40 expression, consequently failing to promote Th1 cell differentiation. In this study, we investigated whether human monocy...
journal_title:Experimental eye research
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doi:10.1016/j.exer.2006.05.005
更新日期:2006-10-01 00:00:00
abstract::The mechanisms by which sulfhydryl (SH-) binding reagents modulate the light-sensitive conductance of retinal rods were investigated by current recording from single rods, by patch clamp recording from the plasma membrane of the rod outer segment (ROS), and by biochemical study of their effects on the light-induced hy...
journal_title:Experimental eye research
pub_type: 杂志文章
doi:10.1016/0014-4835(90)90176-u
更新日期:1990-07-01 00:00:00
abstract::Neovascular age-related macular degeneration (AMD) is a leading cause of vision loss worldwide. Although intravitreal injection of anti-VEGF antibodies and VEGF Trap have significant clinical benefits, the complications of intravitreal injection, drug resistance and patient compliance still need to be concerned. In th...
journal_title:Experimental eye research
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abstract::Dietary restriction can effectively extend lifespan and retard many age-related debilities. One hypothesis to explain the beneficial effects of dietary restriction is that it prolongs maintenance of cellular homeostasis by limiting endogenous oxidative stress and preserves oxidative defense mechanisms during aging. As...
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abstract::We showed previously that treatment of cultured rabbit lens epithelial cells (LECs) with hyperbaric oxygen (HBO) produced DNA strand-breaks, caused reversible inhibition of protein synthesis and induced the synthesis of a 32 kD protein. In the present work, we employed immunostaining procedures to identify the 32 kD p...
journal_title:Experimental eye research
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更新日期:1997-09-01 00:00:00
abstract::A key model for examining the activity-dependent development of primary visual cortex (V1) involves the imbalance in activity between the two eyes induced by monocular deprivation (MD). MD early in life causes dramatic changes in the functional and structural organization of mammalian visual cortex. The molecular sign...
journal_title:Experimental eye research
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doi:10.1016/j.exer.2012.12.016
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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
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abstract::The development and growth of the vertebrate ocular lens is dependent on the regulated proliferation of an anterior monolayer of epithelial cells, and their subsequent differentiation into elongate fiber cells. The growth factor rich ocular media that bathes the lens mediates these cellular processes, and their respec...
journal_title:Experimental eye research
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abstract::Myofibroblast development and haze generation in the corneal stroma is mediated by cytokines, including transforming growth factor-beta (TGF-beta), and possibly other cytokines. This study examined the effects of stromal PDGF-beta blockade on the development of myofibroblasts in response to -9.0 diopter photorefractiv...
journal_title:Experimental eye research
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abstract::The ocular lens fiber cell assembles a novel cytoskeletal element, the Beaded Filament, from CP49 and filensin, two proteins expressed only in the differentiated lens fiber cell. We report the primary sequence, secondary structural analysis, gene structure and Yeast Two Hybrid interaction data for human filensin, and ...
journal_title:Experimental eye research
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abstract::Early stages of glaucoma and optic neuropathies are thought to show inner retina remodeling and functional changes of retinal ganglion cells (RGCs) before they die. To assess RGC functional plasticity, we investigated the contrast-gain control properties of the pattern electroretinogram (PERG), a sensitive measure of ...
journal_title:Experimental eye research
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journal_title:Experimental eye research
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doi:10.1006/exer.1993.1168
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abstract::Preretinal pH was measured in the avascular region of 19 rabbit retinas during alternating cycles of light and dark, using a miniature, needle-type pH electrode. In 14 experiments with the rabbits breathing room air, cyclic changes in pH, decreasing in the dark and increasing in the light, were observed. The transitio...
journal_title:Experimental eye research
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abstract::Careful control of iron availability in the retina is central to maintenance of iron homeostasis, as its imbalance is associated with oxidative stress and the progression of several retinopathies. Ferritin, known for its role in iron storage and detoxification, has also been proposed as an iron-transporter protein, th...
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abstract::The human lens crystallin gene CRYGC T5P is associated with Coppock-like cataract and has a phenotype of a dust-like opacity of the fetal lens nucleus and deep cortical region. Previous in vitro mutation studies indicate that the protein has changed conformation, solubility, and stability, which may make it susceptibl...
journal_title:Experimental eye research
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abstract::In normal retina the developing photoreceptor cells first show presence of opsin over the distal ends of the ciliary protrusions. In a fully differentiated cell intense activity is seen over the rod outer-segment discs; some activity is also seen over the Golgi zone and near the distal ends of the inner segments but t...
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