Abstract：
:The phagocytosis of photoreceptor outer segments (OS) by the retinal pigment epithelium (RPE) is a receptor mediated process. A key component of this process is the receptor tyrosine kinase, Mer. RPE cells from the RCS rat, which lacks a functional mer gene, and do not express Mer protein, are able to bind OS, but are unable to ingest them, suggesting that both a binding receptor and an ingestion receptor (Mer) are required for phagocytosis to occur. These rats become blind shortly after birth. To date the binding receptor has not been identified. Recent studies, using an SV40 transformed rat RPE cell line, RPE-J, or cultured human RPE cells, have suggested that the receptor for OS binding is the integrin alphavbeta5. However, the results presented here clearly show that this integrin plays at most a minor role in the phagocytosis of OS by primary cultures of rat RPE cells. OS phagocytosis by normal RPE cells is not affected by a function-blocking antibody to alphavbeta5 integrin, nor by the integrin-specific blocking peptide GRGDSP. Additionally, RPE-J cells do not express the Mer receptor protein, which has been shown to be obligatory for OS phagocytosis, or RPE65, a specific marker for RPE cells. We suggest that the RPE-J cell line is not a valid model with which to study the complex process of OS phagocytosis.
journal_name
Exp Eye Resjournal_title
Experimental eye researchauthors
Hall MO,Abrams TA,Burgess BLdoi
10.1016/s0014-4835(03)00158-1keywords:
subject
Has Abstractpub_date
2003-09-01 00:00:00pages
281-6issue
3eissn
0014-4835issn
1096-0007pii
S0014483503001581journal_volume
77pub_type
杂志文章abstract：:The ability of diinosine polyphosphates, diinosine triphosphate (Ip(3)I), diinosine tetraphosphate (Ip(4)I) and diinosine pentaphosphate (Ip(5)I) to modify intraocular pressure in normotensive New Zealand white rabbits was tested. Ip(5)I produced increase in intraocular pressure, while Ip(3)I and Ip(4)I produced a dec...
journal_title：Experimental eye research
pub_type： 杂志文章
doi：10.1016/j.exer.2012.05.011
更新日期：2012-08-01 00:00:00
abstract：:We have investigated: (a) Phospholipid composition and phosphoinositide-PO4 turnover in rabbit cornea tissues; and (b) the effects of adrenergic and serotonergic agonists on breakdown of phosphoinositides in the rabbit cornea. The data obtained from these studies can be summarized as follows: (1) in the cornea phospha...
journal_title：Experimental eye research
pub_type： 杂志文章
doi：10.1016/s0014-4835(87)80047-7
更新日期：1987-06-01 00:00:00
abstract：:A micropuncture technique involving the use of microcannulas with tip diameters less than 5 microns was used to measure the pressure in Schlemm's canal and in the meshwork at distances approximately 7 and 14 microns from the inner wall of Schlemm's canal. In one set of experiments where the spontaneous intraocular pre...
journal_title：Experimental eye research
pub_type： 杂志文章
doi：10.1016/0014-4835(92)90151-h
更新日期：1992-06-01 00:00:00
abstract：:This study was performed to determine whether cells in the posterior stroma undergo apoptosis in response to endothelial cell injury and to determine whether basement membrane component nidogen-1 was present in the cornea. New Zealand White rabbits had an olive tip cannula inserted into the anterior chamber to mechani...
journal_title：Experimental eye research
pub_type： 杂志文章
doi：10.1016/j.exer.2018.03.025
更新日期：2018-07-01 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：:Erythropoietin (EPO) plays a critical role in the vascular system and exhibits angiogenic activity in endothelial cells (ECs) such as stimulation of cell proliferation, migration and tube formation in vitro. EPO is the major regulator of cell proliferation and differentiation of erythroid precursors and there by preve...
journal_title：Experimental eye research
pub_type： 杂志文章,收录出版
doi：10.1016/j.exer.2010.03.005
更新日期：2010-06-01 00:00:00
abstract：:Fibroblast growth factors play a key role in regulating lens epithelial cell proliferation and differentiation via an anteroposterior gradient that exists between the aqueous and vitreous humours. FGF-2 is the most important for lens epithelial cell proliferation and differentiation. It has been proposed that the pres...
journal_title：Experimental eye research
pub_type： 杂志文章
doi：10.1016/j.exer.2013.12.004
更新日期：2014-03-01 00:00:00
abstract：:Spontaneous retinal venous pulsations (SRVPs), pulsations of branches of the central retinal vein, are affected by intraocular pressure (IOP) and intracranial pressure (ICP) and thus convey potentially-useful information about ICP. However, the exact relationship between SRVPs, IOP, and ICP is unknown. It is not easil...
journal_title：Experimental eye research
pub_type： 杂志文章
doi：10.1016/j.exer.2019.06.003
更新日期：2019-08-01 00:00:00
abstract：:Human, monkey, and bovine retinal pigment epithelial (RPE) cells exhibit an M-type K+ current, which in many other cell types is mediated by channels composed of KCNQ α-subunits and KCNE auxiliary subunits. Recently, we demonstrated the expression of KCNQ1, KCNQ4, and KCNQ5 in the monkey RPE. Here, we investigated the...
journal_title：Experimental eye research
pub_type： 杂志文章
doi：
更新日期：2013-11-01 00:00:00
abstract：:Aquaporin-0 (AQP0), the major integral membrane protein in lens fiber cells, becomes highly modified with increasing age. The functional consequences of these modifications are being revealed, and the next step is to determine how these modifications affect the ocular lens, which is directly related to their abundance...
journal_title：Experimental eye research
pub_type： 杂志文章
doi：10.1016/j.exer.2011.10.007
更新日期：2011-12-01 00:00:00
abstract：:This study tested the hypothesis that the beta-adrenergic antagonists betaxolol and timolol, cause retinal arteriolar vasodilatation in addition to their ability to reduce intraocular pressure (IOP), and compared their vasodilatory ability with that of a known Ca2+ channel entry blocker nimodipine in donor human and p...
journal_title：Experimental eye research
pub_type： 杂志文章
doi：10.1006/exer.1998.0495
更新日期：1998-07-01 00:00:00
abstract：:This study was conducted to compare the effects of two anti-VEGF-A drugs, Ranibizumab and Aflibercept, on the expression and secretion of VEGFs family members, and on their influence in proliferation and migration of endothelial cells (HECV) in vitro. HECV cells were exposed 24 h (T1), 4 days (T2) and 6 days (T3) to R...
journal_title：Experimental eye research
pub_type： 杂志文章
doi：10.1016/j.exer.2015.12.014
更新日期：2016-05-01 00:00:00
abstract：:Research in animal models have shown that exposing the eye to positive or negative spectacle lenses can lead to predictable changes in eye growth. Recent research indicates that brief periods (1-2 h) of monocular defocus results in small, but significant changes in axial length and choroidal thickness of human subject...
journal_title：Experimental eye research
pub_type： 杂志文章
doi：10.1016/j.exer.2019.03.019
更新日期：2019-05-01 00:00:00
abstract：:Our previous studies in bovine eyes demonstrated that the structural correlate to the increase in outflow facility after either Rho-kinase inhibitor Y-27632 (Y27) treatment or washout appeared to be separation between the juxtacanalicular tissue (JCT) and inner wall (IW) of the aqueous plexus, the bovine equivalent of...
journal_title：Experimental eye research
pub_type： 杂志文章
doi：10.1016/j.exer.2011.05.012
更新日期：2011-10-01 00:00:00
abstract：PURPOSE:To characterize multilamellar bodies (MLBs), determine their distribution along the optic axis and predict their potential Mie scattering within human age-related nuclear cataracts. Previous studies restricted to the equatorial plane have shown that MLBs are rare spherical objects that are 1-4 microm in diamete...
journal_title：Experimental eye research
pub_type： 杂志文章
doi：10.1016/j.exer.2004.05.017
更新日期：2004-10-01 00:00:00
abstract：:We wished to conduct a light and electron microscopic investigation of pigmentation within the trabecular meshwork of normals and primary open angle glaucoma (POAG) patients. In particular we wished to get a precise determination of whether there was a relationship between pigmentation and age. In addition we wanted t...
journal_title：Experimental eye research
pub_type： 杂志文章
doi：10.1016/j.exer.2005.10.009
更新日期：2006-06-01 00:00:00
abstract：:Epidermal growth factor (EGF) previously has been shown to stimulate short-term survival in vitro of cells derived from the native amphibian retinal pigment epithelium (RPE). In the present experiments, we have examined intracellular signaling pathways responsible for mediating these survival-specific growth factor ef...
journal_title：Experimental eye research
pub_type： 杂志文章
doi：10.1016/j.exer.2004.02.017
更新日期：2004-07-01 00:00:00
abstract：:Recently we determined that the Transient Receptor Potential Vanilloid 4 ion channel (TRPV4) has a crucial signaling role in a pathway that regulates various aspects of lens epithelium function. Here, we report on a different TRPV channel, TRPV1, in porcine lens. The presence of TRPV1 in the lens was evident from RT-P...
journal_title：Experimental eye research
pub_type： 杂志文章
doi：10.1016/j.exer.2018.04.006
更新日期：2018-07-01 00:00:00
abstract：:Electrical stimulation of the preganglionic cervical sympathetic nerve produced ocular vasoconstrictor responses as measured from the anterior choroid of anesthetized cats using laser-Doppler flowmetry. Ipsilateral nictitating membrane contractions were simultaneously measured as an established index of neural sympath...
journal_title：Experimental eye research
pub_type： 杂志文章
doi：10.1006/exer.1993.1146
更新日期：1993-10-01 00:00:00
abstract：:Photoreceptor outer segments (OS) in the vertebrate retina undergo a process of continual renewal involving shedding of disc membranes that are cleared by phagocytic uptake into the retinal pigment epithelium (RPE). In dystrophic Royal College of Surgeons (RCS) rats, OS phagocytosis is blocked by a mutation in the gen...
journal_title：Experimental eye research
pub_type： 杂志文章
doi：10.1016/j.exer.2015.08.006
更新日期：2015-11-01 00:00:00
abstract：:The cornea is a self-renewing tissue located at the front of the eye. Its transparency is essential for allowing light to focus onto the retina for visual perception. The continuous renewal of corneal epithelium is supported by limbal stem cells (LSCs) which are located in the border region between conjunctiva and cor...
journal_title：Experimental eye research
pub_type： 杂志文章
doi：10.1016/j.exer.2016.09.008
更新日期：2016-11-01 00:00:00
abstract：:A number of deep-sea fish have bright yellow lenses whose coloration is attributable to a variety of largely unidentified short-wave absorbing pigments. Here the pigment of the deep-sea fish Stylephorus chordatus has been isolated and identified by NMR and mass spectroscopy as kynurenine; a pigment also found in the h...
journal_title：Experimental eye research
pub_type： 杂志文章
doi：10.1016/0014-4835(92)90091-6
更新日期：1992-07-01 00:00:00
abstract：:The C-terminal region of peripherin/rds contains three predicted alpha-helical domains. One of these domains, corresponding to amino acids 311-322, form an amphiphilic alpha-helix previously shown to promote membrane fusion. The present studies were conducted to determine how the additional alpha-helical regions of th...
journal_title：Experimental eye research
pub_type： 杂志文章
doi：10.1006/exer.2002.2013
更新日期：2002-08-01 00:00:00
abstract：:A single intraperitoneal dose of endotoxin (lipopolysaccharide or LPS) induces an acute inflammatory response in the uveal tract of rats. This inflammation is characterized by a breakdown of the blood/aqueous barrier within 3 hr after the LPS and the subsequent development of clinical disease and a cellular infiltrate...
journal_title：Experimental eye research
pub_type： 杂志文章
doi：10.1016/0014-4835(84)90065-4
更新日期：1984-11-01 00:00:00
abstract：:We have determined the pattern of RNA labeling (uridine incorporation) in the normal retina of the domestic cat. One eye in each of eight cats was labeled by injecting [3H]uridine into the vitreous cavity. Two of the labeled eyes had the lens and vitreous removed 10 days before labeling. Three additional animals recei...
journal_title：Experimental eye research
pub_type： 杂志文章
doi：10.1016/0014-4835(90)90066-4
更新日期：1990-08-01 00:00:00
abstract：:Diabetic retinopathy is a sight-threatening complication of diabetes, characterized by loss of retinal pericytes and abnormal angiogenesis. We previously demonstrated that extracellular vesicles (EVs) derived from mesenchymal stem cells cultured in diabetic-like conditions are able to enter the pericytes, causing thei...
journal_title：Experimental eye research
pub_type： 杂志文章
doi：10.1016/j.exer.2018.07.003
更新日期：2018-11-01 00:00:00
abstract：:Ischaemia/reperfusion contributes to the pathophysiological process of many retinal diseases. Previous studies have shown that retinal ischaemia/reperfusion mainly results in neuronal degeneration, including thinning of the retina, retinal ganglion cell death and reductions in electroretinography. A high-salt diet con...
journal_title：Experimental eye research
pub_type： 杂志文章
doi：10.1016/j.exer.2019.107784
更新日期：2019-11-01 00:00:00
abstract：:Polyclonal antisera have been made to synthetic peptides corresponding to the N- and C-terminal regions of the putative gamma 1-2 gene from human lens. These antisera are specific for gamma crystallin, showing no cross-reactivity with any polypeptides of the alpha- and beta-crystallin fractions. Western blot analysis ...
journal_title：Experimental eye research
pub_type： 杂志文章
doi：10.1016/s0014-4835(87)80144-6
更新日期：1987-08-01 00:00:00
abstract：:The differentiation of rat lens epithelial cells to fibre cells can be mimicked using lens epithelial explants, which differentiate in vitro when exposed to fibroblast growth factor (FGF). A previous study demonstrated that FGF is required only for initiation of differentiation: once induced by FGF, differentiation ca...
journal_title：Experimental eye research
pub_type： 杂志文章
doi：10.1006/exer.1998.0534
更新日期：1998-10-01 00:00:00
abstract：:Familial exudative vitreoretinopathy (FEVR) is a disease exhibits a wide range of clinical signs, ranging mild peripheral retinal vascular anomalies to severe retinal detachments. Individuals with mild FEVR are frequently asymptomatic with good visual function and are often undiagnosed. However, little is known about ...
journal_title：Experimental eye research
pub_type： 杂志文章
doi：10.1016/j.exer.2020.107941
更新日期：2020-03-01 00:00:00
