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, and calpastatin antibodies were used for identification of the respective proteins. The extent of calcium-mediated 68 kD NFP degradation compared to EGTA controls, served to quantify calpain activity, while the extent of calpain autolysis measured the activation of the enzyme. A progressive loss of 68 kD NFP was observed at 15 min (42.1%), 1 hr (52.7%) and 6 hr (73.4%) incubation periods compared to EGTA controls. The immunoreactive calpain bands showed progressive autolysis after 15 min (26.6%), 1 hr (31.4%) and 6 hr (43.4%) incubations. We also found degradation of low molecular weight isoforms of calpastatin (43 kD and 27 kD) in the presence of calcium compared to controls. These results indicate that calpain is present in optic nerve in its inactive form but when calcium is added, it undergoes autolysis and becomes active. Thus, active calpain is capable of degrading endogenous substrates (e.g. cytoskeletal and myelin proteins) and may promote the degeneration of optic nerve in optic neuritis.
journal_name
Exp Eye Resjournal_title
Experimental eye researchauthors
Shields DC,Leblanc C,Banik NLdoi
10.1006/exer.1997.0286subject
Has Abstractpub_date
1997-07-01 00:00:00pages
15-21issue
1eissn
0014-4835issn
1096-0007pii
S0014-4835(97)90286-4journal_volume
65pub_type
杂志文章abstract：:Osteopontin (OPN) is elevated during the progression of experimental autoimmune uveoretinitis (EAU) in C57BL/6 (B6) mice. Furthermore, EAU symptoms are ameliorated in OPN knockout mice or in B6 mice treated with anti-OPN antibody (M5). Recently, OPN has been shown to promote the Th1 response not only in the extracellu...
journal_title：Experimental eye research
pub_type： 杂志文章
doi：10.1016/j.exer.2009.09.008
更新日期：2010-01-01 00:00:00
abstract：:The aim of this study was to identify the molecular genetic cause of disease in posterior polymorphous corneal dystrophy (PPCD) probands of diverse origin and to assess the utility of massively parallel sequencing in the detection of ZEB1 mutations. We investigated a total of 12 families (five British, four Czech, one...
journal_title：Experimental eye research
pub_type： 杂志文章
doi：10.1016/j.exer.2019.03.002
更新日期：2019-05-01 00:00:00
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
pub_type： 杂志文章
doi：10.1016/j.exer.2008.12.006
更新日期：2009-05-01 00:00:00
abstract：:An enzymatic procedure for the estimation of organic hydroperoxides has been adapted to biological tissues and applied to the measurement of hydroperoxides in the rat retina. Hydroperoxides are determined from the coupled activities of glutathione peroxidase and glutathione reductase as measured by the loss of NADPH a...
journal_title：Experimental eye research
pub_type： 杂志文章
doi：10.1016/0014-4835(83)90116-1
更新日期：1983-03-01 00:00:00
abstract：:The central retinal artery (CRA) is the main vessel for inner retinal oxygen and nutrition supply. While the intraocular branches lack autonomic innervation, the innervation pattern of the extra-ocular part of this vessel along its course within the optic nerve is poorly investigated. This part however is essential fo...
journal_title：Experimental eye research
pub_type： 杂志文章
doi：10.1016/j.exer.2012.11.020
更新日期：2013-05-01 00:00:00
abstract：:Early-onset Fuchs endothelial corneal dystrophy (FECD) has been associated with nonsynonymous mutations in collagen VIII α2 (COL8A2), a key extracellular matrix (ECM) protein in Descemet's membrane (DM). Two knock-in strains of mice have been generated to each express a mutant COL8A2 protein (Col8a2L450W/L450W and Col...
journal_title：Experimental eye research
pub_type： 杂志文章
doi：10.1016/j.exer.2018.11.021
更新日期：2019-03-01 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
abstract：:The effect of kainic acid (KA) on rat retinal morphology was investigated with emphasis on the ganglion cell layer. Two hours after intraocular injection of KA, 70% of the neurones in the ganglion cell layer display morphological alterations. These alterations at the ultrastructural level include the absence of identi...
journal_title：Experimental eye research
pub_type： 杂志文章
doi：10.1016/0014-4835(83)90014-3
更新日期：1983-02-01 00:00:00
abstract：:Bombina variegata 8 (Bv8), also known as prokineticin-2 (PK-2), is a potent pro-angiogenic factor. However, its role in retinal neovascularization (RNV) remains unknown. In this study, we explored the role of Bv8 in the pathogenesis of RNV. We found that the expression of Bv8 was significantly increased in two differe...
journal_title：Experimental eye research
pub_type： 杂志文章
doi：10.1016/j.exer.2020.107993
更新日期：2020-04-01 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：:cDNA clones encoding S-antigen (arrestin) were isolated from the expression library constructed from porcine retina and sequenced. The 1490 base pair fragment contained a 1215 base pair open reading frame. From the nucleotide sequence, an amino acid sequence consisting of 405 residues was deduced and a molecular mass ...
journal_title：Experimental eye research
pub_type： 杂志文章
doi：10.1006/exer.1996.0036
更新日期：1996-03-01 00:00:00
abstract：:Retinal inflammation is an integral component of many retinal diseases including diabetic retinopathy (DR), age-related macular degeneration (AMD) and retinopathy of prematurity (ROP). Inflammation is commonly initiated and perpetuated by myeloid-derived immune cells. In the retina, microglial cells are resident macro...
journal_title：Experimental eye research
pub_type： 杂志文章
doi：10.1016/j.exer.2019.05.010
更新日期：2019-08-01 00:00:00
abstract：:This study sought to pharmacologically characterize bradykinin receptors on SV40-immortalized human trabecular meshwork (HTM3) cells. Phosphoinositide (PI) turnover studies were conducted using [3H]myo-inositol-labeled HTM3 cells and anion exchange chromatography to quantify [3H]inositol phosphates generated in respon...
journal_title：Experimental eye research
pub_type： 杂志文章
doi：10.1006/exer.1996.0157
更新日期：1996-12-01 00:00:00
abstract：:The biosafety and efficiency of transplanting retinal pigment epithelial (RPE) cells derived from both human embryonic stem cells (hESCs) and induced pluripotent stem cells (iPSCs) have been evaluated in phase I and phase II clinical trials. For further large-scale application, cryopreserved RPE cells must be used; th...
journal_title：Experimental eye research
pub_type： 杂志文章
doi：10.1016/j.exer.2020.108305
更新日期：2021-01-01 00:00:00
abstract：:Choroidal neovascularization (CNV) is one of the severe pathological consequences of the end-stage of age-related macular degeneration (AMD). Several lines of evidence implicate increased levels of vascular endothelial growth factor (VEGF) in the retinas of AMD patients. Current available agents for the inhibition of ...
journal_title：Experimental eye research
pub_type： 杂志文章
doi：10.1016/j.exer.2010.06.019
更新日期：2010-09-01 00:00:00
abstract：:N-methyl-D-aspartate (NMDA)-induced excitotoxicity is an acute form of experimental retinal injury as a result of overactivation of glutamate receptors. NLRP3 (nucleotide-binding domain, leucine-rich-repeat containing family, pyrin domain containing-3) inflammasome, one of the most studied sensors of innate immunity, ...
journal_title：Experimental eye research
pub_type： 杂志文章
doi：10.1016/j.exer.2019.01.018
更新日期：2019-04-01 00:00:00
abstract：:Sodium hyaluronates with molecular weights of 18000, 500000 and 4 x 10(6), labelled with either 3H or 14C, were injected into the anterior chamber or into the centre of the vitreous body of rabbits and their rates of disappearance were followed. The out-flow from the anterior chamber in anaesthetized animals was virtu...
journal_title：Experimental eye research
pub_type： 杂志文章
doi：10.1016/0014-4835(83)90043-x
更新日期：1983-04-01 00:00:00
abstract：:Thrombospondin-1 (TSP-1) is a multifunctional matrix protein that has recently been examined in various wound processes, primarily for its ability to activate the latent complex of transforming growth factor-beta (TGF-β). TGF-β has been shown to play a major role in stimulating mesenchymal cells to synthesize extracel...
journal_title：Experimental eye research
pub_type： 杂志文章
doi：10.1016/j.exer.2011.06.018
更新日期：2011-10-01 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：:The effects of metabolic inhibitors on the apical and basal membrane potentials were studied in the isolated retinal pigment epithelium of the lizard Gekko gekko. Adding dinitrophenol or cyanide or cooling the tissue to 15 degrees C first depolarized the apical membrane and then hyperpolarized the basal membrane. The ...
journal_title：Experimental eye research
pub_type： 杂志文章
doi：10.1016/0014-4835(90)90015-m
更新日期：1990-01-01 00:00:00
abstract：:Sugar alcohols have been reported to accumulate in retinal pigment epithelium (RPE) of diabetic animals. This finding has raised interest in the role of RPE in diabetes-associated retinal changes such as cystoid macular edema. To confirm the presence of aldose reductase in this tissue, the NADPH-dependent enzyme was p...
journal_title：Experimental eye research
pub_type： 杂志文章
doi：10.1006/exer.1993.1119
更新日期：1993-08-01 00:00:00
abstract：:In the ophthalmological clinic, intravitreally applied antibodies or Fc-containing fusion proteins are frequently used, but the biology and pharmacokinetics of these therapeutics in the retina are not well understood. We have previously shown intracellular uptake of Fc-containing molecules in RPE cells. In this study,...
journal_title：Experimental eye research
pub_type： 杂志文章
doi：10.1016/j.exer.2015.12.013
更新日期：2016-04-01 00:00:00
abstract：:This is a brief overview of multifaceted anatomical, experimental and clinical studies conducted by the author since 1955 on the optic nerve head circulation in health and disease. Conclusions, based on the accumulated information provided by these studies, are summarized. The studies on the pattern of blood supply of...
journal_title：Experimental eye research
pub_type： 杂志文章,评审
doi：10.1016/s0014-4835(05)80121-6
更新日期：1995-09-01 00:00:00
abstract：:Type I and type II isoenzymes of cyclic AMP-dependent protein kinase were identified by anion exchange chromatography and immunoblotting in human retina at various stages of development. The type I form was typical of the early fetal stage during which proliferation and migration were the primary cellular processes. I...
journal_title：Experimental eye research
pub_type： 杂志文章
doi：10.1016/0014-4835(89)90059-6
更新日期：1989-06-01 00:00:00
abstract：:The immunolocalization of the low density lipoprotein receptor-related protein 1 (LRP1) and its ligand alpha 2-Macroglobulin (alpha(2)M) was examined in tissues from human donor eyes of normal, diabetic and sickle cell disease subjects. Streptavidin alkaline phosphatase immunohistochemistry was performed with a mouse ...
journal_title：Experimental eye research
pub_type： 杂志文章
doi：10.1016/j.exer.2010.05.017
更新日期：2010-08-01 00:00:00
abstract：:Vitreous from bovine, human and chick embryo has been found to contain a trypsin inhibitory activity. Chymotrypsin-inhibitory activity was also identified in bovine and chick embryo vitreous. Following either ultrafiltration or Bio Gel P-10 chromatography, these activities appear in fractions having a molecular weight...
journal_title：Experimental eye research
pub_type： 杂志文章
doi：10.1016/0014-4835(85)90031-4
更新日期：1985-11-01 00:00:00
abstract：:Understanding mechanisms of glaucomatous optic nerve damage is essential for developing effective therapies to augment conventional pressure-lowering treatments. This requires that we understand not only the physical forces in play, but the cellular responses that translate these forces into axonal injury. The former ...
journal_title：Experimental eye research
pub_type： 杂志文章,评审
doi：10.1016/j.exer.2010.08.005
更新日期：2011-08-01 00:00:00
abstract：:Diabetic retinopathy is a complication of diabetes and a leading cause of vision loss among working-age adults. To assess whether the Wistar rat with Streptozotocin (STZ)-induced diabetes is a suitable animal model of human proliferative diabetic retinopathy we evaluated the vascular changes to assess the diabetic ret...
journal_title：Experimental eye research
pub_type： 杂志文章
doi：10.1016/j.exer.2019.04.025
更新日期：2019-07-01 00:00:00
abstract：:The shapes of two human lenses of different ages (27 and 46 years old) were altered by applying a stretching force to the ciliary muscle. The force was in the outward radial direction and was produced by an electronically driven stretching instrument which is described. The lenses were photographed for different degre...
journal_title：Experimental eye research
pub_type： 杂志文章
doi：10.1006/exer.1993.1168
更新日期：1993-11-01 00:00:00
abstract：:VEGF secretion by the human retinal pigment epithelium (hRPE) plays an important role in retinal and choroidal neovascularization. In this study, transforming growth factor-beta2 (TGF-beta2)-induced vascular endothelial growth factor (VEGF) gene expression was investigated in hRPE cells. Treatment of hRPE cells with T...
journal_title：Experimental eye research
pub_type： 杂志文章
doi：10.1016/j.exer.2006.12.016
更新日期：2007-05-01 00:00:00
