Abstract：
:Experiments were performed using [1-14C]PGH2 endoperoxide as substrate to assess which, if any, of the PGH2 utilizing enzymes were present in rat lens microsomes. After a 15 min incubation, prostaglandins (PGs) were extracted, separated by thin-layer chromatography and labeled PGs located by autoradiography. The bands were cut and counted and product formation expressed as a percentage of the total recovered label. Prostaglandin PGE2 formation accounted for 24% of the label and was not increased (22%) when 1 mM reduced glutathione (GSH), the obligate cofactor of PGH2----PGE2 isomerase, was added. However, the addition of the GSH significantly increased PGF2 alpha generation from 25% to 37%. Pretreatment of the microsomes with p-hydroxymercuribenzoate, a sulfhydryl-blocking agent and an inhibitor of PGH2----PGE2 isomerase, did not limit lens microsomal PGE2 formation (24% vs. 39%) but dramatically inhibited PGF2 alpha production (25% vs. 6%). Boiling the microsomes did not alter PGF2 alpha or PGE2 generation suggesting that these PGs were non-enzymatically produced. No thromboxane B2 or 6-keto-PGF1 alpha (the stable breakdown products of thromboxane A2 and prostacyclin, respectively) were found indicating that their respective synthetases were absent in the lens microsomes. These data suggest that the lens is a unique tissue, generating the primary PGs in the absence of all known PGH2 endoperoxide-utilizing enzymes. It appears that the PGH2 formed by lens cyclo-oxygenase spontaneously breaks down in the lens microsomes into PGE2, PGD2 and PGF2 alpha.
journal_name
Exp Eye Resjournal_title
Experimental eye researchauthors
Keeting PE,Dong DS,Fu SC,Lysz TWdoi
10.1016/s0014-4835(87)80010-6subject
Has Abstractpub_date
1987-02-01 00:00:00pages
261-8issue
2eissn
0014-4835issn
1096-0007journal_volume
44pub_type
杂志文章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：:The lipid composition of retinal pigment epithelial cells was determined for normal cells which have full phagocytic ability and for a genetic variant with impaired phagocytic function. Retinal pigment epithelial cells from 9-14-day-old congenic strains of normal (RCS-rdy+) and dystrophic (RCS-rdy/rdy) rats were separ...
journal_title：Experimental eye research
pub_type： 杂志文章
doi：10.1016/s0014-4835(86)80006-9
更新日期：1986-11-01 00:00:00
abstract：:The biomechanical environment within the eye is of interest in both the regulation of intraocular pressure and the loss of retinal ganglion cell axons in glaucomatous optic neuropathy. Unfortunately, this environment is complex and difficult to determine. Here we provide a brief introduction to basic concepts of mecha...
journal_title：Experimental eye research
pub_type： 杂志文章,评审
doi：10.1016/j.exer.2015.05.024
更新日期：2015-12-01 00:00:00
abstract：:Human Kv3.3/KCNC3 is a Shaw-type potassium channel that has been mapped to chromosome 19q13.3-13.4. Complete mouse and rat Kv3.3 cDNA coding sequences have been published, yet the human Kv3.3 cDNA has remained incomplete for years. We report here for the first time the amino acid sequence for hKv3.3 and the electrophy...
journal_title：Experimental eye research
pub_type： 杂志文章
doi：10.1006/exer.1999.0796
更新日期：2000-03-01 00:00:00
abstract：:Childhood glaucoma is an important cause of blindness world-wide. Eleven genes are currently known to cause inherited forms of glaucoma with onset before age 20. While all the early-onset glaucoma genes cause severe disease, considerable phenotypic variability is observed among mutations carriers. In particular, FOXC1...
journal_title：Experimental eye research
pub_type： 杂志文章,评审
doi：10.1016/j.exer.2019.107893
更新日期：2020-01-01 00:00:00
abstract：:Fatty Liver Shionogi (FLS) mice have been shown to develop a hereditary disorder characterized by localized retinochoroidal defects of the ventral fundus very similar to human typical ocular coloboma without microphthalmia. The objective of this study was to determine when and how the failure of the optic fissure clos...
journal_title：Experimental eye research
pub_type： 杂志文章
doi：10.1016/j.exer.2011.12.004
更新日期：2012-01-01 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
pub_type： 杂志文章
doi：10.1016/j.exer.2006.05.005
更新日期：2006-10-01 00:00:00
abstract：:Previous histochemical and biochemical studies have documented the presence of carbohydrate-containing molecules in the retinal interphotoreceptor matrix (IPM). The lectin peanut agglutinin (PNA), which preferentially binds galactose-containing carbohydrates, especially galactose-galactosamine linkages, selectively la...
journal_title：Experimental eye research
pub_type： 杂志文章
doi：10.1016/s0014-4835(87)80163-x
更新日期：1987-04-01 00:00:00
abstract：:Mounting evidence suggests neuroinflammation is a key process in glaucoma, yet the precise roles are not known. Understanding these complex processes, which may also be a key in other common neurodegenerations such as Alzheimer's disease, will lead to targeted therapeutics for a disease that affects as many as 80 mill...
journal_title：Experimental eye research
pub_type： 杂志文章,评审
doi：10.1016/j.exer.2017.02.014
更新日期：2017-04-01 00:00:00
abstract：:Although the presence of 'cartilage-specific' collagens in the eye has been documented earlier, very little is known about their synthesis rates during ocular development, growth and aging. The purpose of the present study was to follow changes in the mRNA levels and distribution of key components of the extracellular...
journal_title：Experimental eye research
pub_type： 杂志文章
doi：10.1006/exer.2000.0972
更新日期：2001-04-01 00:00:00
abstract：:To investigate the nature of the 140 kDa glycoprotein in the trabecular meshwork, polypeptides were extracted with either urea/sodium dodecyl sulfate (SDS)/beta-2-mercaptoethanol (BME) or guanidine hydrochloride followed by pepsin digestion. After electrophoresis and immunoblotting with anti-type-VI-collagen antibodie...
journal_title：Experimental eye research
pub_type： 杂志文章
doi：10.1006/exer.1994.1006
更新日期：1994-02-01 00:00:00
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 ...
journal_title：Experimental eye research
pub_type： 杂志文章
doi：10.1016/s0014-4835(87)80052-0
更新日期：1987-06-01 00:00:00
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...
journal_title：Experimental eye research
pub_type： 杂志文章
doi：10.1016/s0014-4835(03)00068-x
更新日期：2003-07-01 00:00:00
abstract：:The Otx2 gene encodes a transcription factor essential for the normal development of brain, cerebellum, pineal gland, and eye. In the retina, Otx2 has essential functions from early embryogenesis to adulthood. As soon as the optic vesicle is formed, the gene is required for retinal pigment epithelium specification. Ot...
journal_title：Experimental eye research
pub_type： 杂志文章,评审
doi：10.1016/j.exer.2013.03.007
更新日期：2013-06-01 00:00:00
abstract：:We have investigated the biochemical and cell biological basis of the reported beneficiary effects of the leaf extracts of the plant Ginkgo biloba, which has been used as a possible ophthalmic drug. The antioxidant, antimicrobial, anti-apoptotic and cytoprotective properties of the standardized extract called EGb761 w...
journal_title：Experimental eye research
pub_type： 杂志文章
doi：
更新日期：2002-10-01 00:00:00
abstract：:SV40 human corneal epithelial cell (HCEC) populations are readily used as a substitute for primary corneal epithelial cells that are difficult to maintain in vitro. To initiate cell-cycle experiments with the SV40-HCEC cells, two separate methods of cell synchronization were compared including serum starvation and ste...
journal_title：Experimental eye research
pub_type： 杂志文章
doi：10.1016/j.exer.2005.11.007
更新日期：2006-07-01 00:00:00
abstract：:This review is focused on iron metabolism in the retina and in the lens and its relation to their respective age-related pathologies, macular degeneration (AMD) and cataract (ARC). Several aspects of iron homeostasis are considered first in the retina and second in the lens, paying particular attention to the transpor...
journal_title：Experimental eye research
pub_type： 杂志文章,评审
doi：10.1016/j.exer.2010.03.003
更新日期：2010-06-01 00:00:00
abstract：:Retinoblastoma generally occurs before 5 years of age and often requires enucleation (surgical removal of one eye) of the cancerous eye. We have previously shown using behavioural methods that this disruption in binocular vision during the critical period of visual development results in impaired face perception. In t...
journal_title：Experimental eye research
pub_type： 杂志文章
doi：10.1016/j.exer.2018.09.013
更新日期：2019-06-01 00:00:00
abstract：:The rd (retinal degeneration) chick possesses an autosomal recessive mutation which results in behavioral and electrophysiological blindness at hatch. Using the technique of two-dimensional gel electrophoresis, we have identified two groups of proteins whose expression in the retina/pigment epithelium/choroid (RET/PE/...
journal_title：Experimental eye research
pub_type： 杂志文章
doi：10.1016/s0014-4835(89)80061-2
更新日期：1989-10-01 00:00:00
abstract：:We previously demonstrated that there are two waves of increased collagen synthesis following corneal laceration in rabbits. In the present study, we have examined whether increases in collagen synthesis and degradation result from increased amounts of mRNAs for collagen and collagenase, respectively. Rabbits were ane...
journal_title：Experimental eye research
pub_type： 杂志文章
doi：10.1016/0014-4835(91)90086-t
更新日期：1991-03-01 00:00:00
abstract：:Argon laser energy was applied to the trabecular meshwork of pigmented rabbits in an attempt to develop an animal model of 'glaucoma'. Laser energy was varied to determine the optimal level needed to produce sustained ocular hypertension. An initial response of ocular hypertension followed by hypotension was observed ...
journal_title：Experimental eye research
pub_type： 杂志文章
doi：10.1016/0014-4835(86)90067-9
更新日期：1986-12-01 00:00:00
abstract：:A serum-free culture of chicken retinal pigmented epithelial cells has been established in order to analyse how cell-substrate interactions or environmental factors affect the process of transdifferentiation into lens cells from pigmented epithelial cells. The serum-free culture medium for chicken pigmented epithelial...
journal_title：Experimental eye research
pub_type： 杂志文章
doi：10.1016/0014-4835(92)90190-4
更新日期：1992-08-01 00:00:00
abstract：:Human tear fluid was collected with blunted glass capillaries before and after performing the Schirmer test (ST). The test caused an increase in the tear fluid (TF) plasmin concentration (from 0.40 +/- 0.29 microgram ml-1 (mean +/- S.E.M.) to 1.14 +/- 0.26 microgram ml-1; Mann-Whitney test P less than 0.001) and a dec...
journal_title：Experimental eye research
pub_type： 杂志文章
doi：10.1016/0014-4835(90)90223-h
更新日期：1990-02-01 00:00:00
abstract：:Glaucoma is defined as a progressive optic neuropathy and is characterized by an irreversible loss of retinal ganglion cells. The main risk factor to develop glaucoma is an increased intraocular pressure (IOP). During the course of glaucoma structural changes in the optic nerve head (ONH) take place which lead to the ...
journal_title：Experimental eye research
pub_type： 杂志文章,评审
doi：10.1016/j.exer.2015.08.014
更新日期：2016-01-01 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：:By using immunohistochemical techniques, we demonstrated that HLA class I (A, B and C) and HLA class II (DR), the major histocompatibility antigens in man, are expressed constitutively by cells of the trabecular meshwork/Schlemm's canal system and corneal endothelium, as well as by the conjunctival epithelium, Langerh...
journal_title：Experimental eye research
pub_type： 杂志文章
doi：10.1016/0014-4835(90)90023-n
更新日期：1990-09-01 00:00:00
abstract：:Interphotoreceptor retinoid-binding protein (IRBP) is a vitamin A carrier present only in the extracellular material lying between the neural retina and the retinal pigment epithelium of vertebrate eyes. The amount of retinol bound endogenously by IRBP in this interphotoreceptor space is known to increase upon illumin...
journal_title：Experimental eye research
pub_type： 杂志文章
doi：10.1016/0014-4835(91)90239-b
更新日期：1991-09-01 00:00:00
abstract：:The response of the lens to changes in the distribution and concentration of electrolytes can be measured by characterizing the changes in resistivity that occur secondary to variations in intracellular composition. Regional intracellular cytoplasmic resistivities of lens fiber cells can be approximated by homogenates...
journal_title：Experimental eye research
pub_type： 杂志文章
doi：10.1016/s0014-4835(87)80164-1
更新日期：1987-04-01 00:00:00
abstract：:Exposure to hyposmotic solution causes release of ATP from lens cells via hemichannels. Because hemichannel opening feasibly could swamp the cells with calcium, we carried out studies to measure the magnitude of the increase in cytoplasmic calcium concentration caused by hemichannel opening. In studies on porcine lens...
journal_title：Experimental eye research
pub_type： 杂志文章
doi：10.1016/j.exer.2015.01.012
更新日期：2015-03-01 00:00:00
abstract：:There has been generally little attention paid to the utilization of biomaterials as an anti-myopia treatment. The purpose of this study was to investigate whether polymeric hydrogels, either implanted or injected adjacent to the outer scleral surface, slow ocular elongation. White Leghorn (Gallus gallus domesticus) c...
journal_title：Experimental eye research
pub_type： 杂志文章
doi：10.1016/j.exer.2008.10.029
更新日期：2009-03-01 00:00:00
