Abstract:
PURPOSE:Cilostazol, a selective inhibitor of phosphodiesterase 3, has antiplatelet aggregation and peripheral vasodilation effects. We examined the effects of cilostazol on the retinal microvascular diameter to determine its dependence on the endothelium and/or smooth muscle to reveal the signaling mechanisms involved in this vasomotor activity. METHODS:Porcine retinal arterioles were isolated, cannulated, and pressurized without flow in vitro. Video microscopic techniques recorded the diametric responses to cilostazol. RESULTS:The retinal arterioles dilated in response to cilostazol in a dose-dependent (100 pM-10 μM) manner; the dilation decreased by 60% after endothelial removal. The nitric oxide (NO) synthase inhibitor, NG-nitro-L-arginine methyl ester (L-NAME), inhibited cilostazol-induced vasodilation comparable to denudation. Inhibition of soluble guanylyl cyclase and blockade of protein kinase A (PKA) were comparable to L-NAME. Compound C, an AMP-activated protein kinase (AMPK) inhibitor, partially inhibited cilostazol-induced vasodilation, which exhibited a weaker inhibitory effect on cilostazol-induced vasodilation than blockade of PKA. The large-conductance Ca²⁺-activated K channel (BK(Ca) channel) blocker, iberiotoxin, also inhibited cilostazol-induced vasodilation. The residual vasodilation decreased further with co-administration of L-NAME and iberiotoxin. CONCLUSIONS:Cilostazol elicits endothelium-dependent and -independent dilation of the retinal arterioles mediated by NO release and BK(Ca) channel activation, respectively. Endothelial nitric oxide synthase (eNOS) phosphorylation via the cAMP/PKA and AMPK pathways and consequent activation of the soluble guanylyl cyclase/cyclic guanosine monophosphate pathway might play an important role in cilostazol-induced vasodilation of the retinal arterioles.
journal_name
Invest Ophthalmol Vis Scijournal_title
Investigative ophthalmology & visual scienceauthors
Tanano I,Nagaoka T,Omae T,Ishibazawa A,Kamiya T,Ono S,Yoshida Adoi
10.1167/iovs.12-10115subject
Has Abstractpub_date
2013-02-19 00:00:00pages
1443-9issue
2eissn
0146-0404issn
1552-5783pii
iovs.12-10115journal_volume
54pub_type
杂志文章abstract:PURPOSE:Sildenafil increases ocular blood flow. Thus, the authors investigated if it also increases anterior chamber (AC) refilling after paracentesis. METHODS:Corriedale sheep and albino rabbits were used as animal models. Intraocular pressure (IOP) was measured, paracentesis performed on one eye, and AC refilling fo...
journal_title:Investigative ophthalmology & visual science
pub_type: 杂志文章
doi:10.1167/iovs.11-8275
更新日期:2012-02-01 00:00:00
abstract:PURPOSE:To develop and characterize a feline model of retinal degeneration induced by intravitreal injection of adenosine triphosphate (ATP). METHODS:Nineteen normally sighted adult cats received 100 μL intravitreal injections of ATP with a final concentration of 11, 22, or 55 mM at the retina. Four animals were eutha...
journal_title:Investigative ophthalmology & visual science
pub_type: 杂志文章
doi:10.1167/iovs.14-15732
更新日期:2014-11-25 00:00:00
abstract:Purpose:To determine if cytokine tear levels before hematopoietic stem cell transplantation (HSCT) can help anticipate the occurrence of ocular chronic graft-versus-host disease (cGVHD). Methods:In this pilot study, 25 patients undergoing HSCT were followed prospectively for ≤43 months. After ocular examinations, tear...
journal_title:Investigative ophthalmology & visual science
pub_type: 杂志文章
doi:10.1167/iovs.17-21670
更新日期:2017-09-01 00:00:00
abstract:Purpose:To examine the coaggregation and cohesion between the commonly isolated bacteria from contact lens cases. Methods:Four or five strains each of commonly isolated bacteria from contact lens cases, Staphylococcus aureus, Staphylococcus epidermidis, Pseudomonas aeruginosa, and Serratia marcescens, were grown, wash...
journal_title:Investigative ophthalmology & visual science
pub_type: 杂志文章
doi:10.1167/iovs.16-20593
更新日期:2017-01-01 00:00:00
abstract:PURPOSE:To define the phenotypes of retinal degenerations associated with mutations in the gene encoding CRX (cone-rod homeobox), a photoreceptor-specific transcription factor. METHODS:Heterozygotes with the E168 [delta1 bp], E168 [delta2 bp], or G217 [delta1 bp] CRXgene mutation were studied clinically, with visual f...
journal_title:Investigative ophthalmology & visual science
pub_type: 杂志文章
doi:
更新日期:1998-11-01 00:00:00
abstract:PURPOSE:Retinal pigment epithelium (RPE) transplantation is a promising strategy for the treatment of dry age-related macular degeneration (AMD). However, previous attempts at subretinal RPE cell transplantation have experienced limited success due to poor adhesion, organization, and function on aged or diseased Bruch'...
journal_title:Investigative ophthalmology & visual science
pub_type: 杂志文章
doi:10.1167/iovs.13-12833
更新日期:2014-03-25 00:00:00
abstract:PURPOSE:To determine whether tonometric readings of increases in intraocular pressure (IOP) during the water-drinking test (WDT) are affected by variations in central corneal thickness (CCT) induced by photorefractive keratectomy (PRK). METHODS:Data from 30 randomly selected eyes of 30 patients (18 men and 12 women; m...
journal_title:Investigative ophthalmology & visual science
pub_type: 杂志文章
doi:10.1167/iovs.04-1240
更新日期:2005-09-01 00:00:00
abstract:Purpose:Uveal melanoma (UM) is the most common primary intraocular malignancy in adults and approximately half of those diagnosed will die of metastasis. This study investigates whether UM progression is driven by a subpopulation of stem-like cells, termed "cancer stem cells" (CSCs). Methods:Expression of postulated s...
journal_title:Investigative ophthalmology & visual science
pub_type: 杂志文章
doi:10.1167/iovs.17-22272
更新日期:2017-10-01 00:00:00
abstract::Sections of the ciliary epithelium of adult sharks (Squalus acanthias) were mounted in Ussing-type chambers (area 0.2 cm2) for measurements of transepithelial potential difference (PD), short circuit current (SCC) and calculation of transepithelial resistance (R). In 15 preparations PD was aqueous side negative (-0.51...
journal_title:Investigative ophthalmology & visual science
pub_type: 杂志文章
doi:
更新日期:1987-08-01 00:00:00
abstract:PURPOSE:To evaluate changes of levels of erythropoietin (EPO) and VEGF in aqueous humor before and after an intravitreal injection of bevacizumab (IVB) and determine the underlying correlation between them. METHODS:This prospective study involved 21 eyes of 21 patients with surgery-required advanced neovascular glauco...
journal_title:Investigative ophthalmology & visual science
pub_type: 杂志文章
doi:10.1167/iovs.12-11507
更新日期:2013-06-04 00:00:00
abstract:PURPOSE:Tubby-like proteins (TULPs) are a family of four proteins, two of which have been linked to neurosensory disease phenotypes. TULP1 is a photoreceptor-specific protein that is mutated in retinitis pigmentosa, an inherited retinal disease characterized by the degeneration of rod and cone photoreceptor cells. To i...
journal_title:Investigative ophthalmology & visual science
pub_type: 杂志文章
doi:10.1167/iovs.06-0059
更新日期:2007-06-01 00:00:00
abstract:PURPOSE:Connexin50 (Cx50) is absolutely essential for normal postnatal lens growth. Deletion of Cx50 or replacement with Cx46 by knockin resulted in smaller lenses containing fewer cells. To determine why Cx50-deficient lenses fail to grow normally, cell proliferation was assayed during the period of growth failure. M...
journal_title:Investigative ophthalmology & visual science
pub_type: 杂志文章
doi:10.1167/iovs.04-0194
更新日期:2004-09-01 00:00:00
abstract:Purpose:Corneal endothelial cells (CECs) are critical in maintaining clarity of the cornea. This study was initiated to develop peripheral blood mononuclear cell (PBMC)-originated, induced pluripotent stem cell (iPSC)-derived CECs. Methods:We isolated PBMCs and programmed the mononuclear cells to generate iPSCs, which...
journal_title:Investigative ophthalmology & visual science
pub_type: 杂志文章
doi:10.1167/iovs.17-22927
更新日期:2018-05-01 00:00:00
abstract:PURPOSE:To estimate the heritability of the iridotrabecular angle width measured by anterior segment optical coherence tomography (ASOCT) in a classic twin study. METHODS:Twins aged 8 to 16 years were identified from the Guangzhou Twin Registry. ASOCT was used to obtain one horizontal scan, and the images were analyze...
journal_title:Investigative ophthalmology & visual science
pub_type: 杂志文章
doi:10.1167/iovs.07-1397
更新日期:2008-04-01 00:00:00
abstract:PURPOSE:To describe an in vivo mouse model for the study of recurrent corneal erosion syndrome (RCES) in mice and to characterize the changes in alpha9 integrin expression during wound healing. METHODS:Corneal epithelial debridement wounds of two sizes (1.5 and 2.5 mm) were made on the ocular surface of BALB/c mice an...
journal_title:Investigative ophthalmology & visual science
pub_type: 杂志文章
doi:10.1167/iovs.03-1194
更新日期:2004-06-01 00:00:00
abstract:PURPOSE:Excessive and continuously produced free radicals in the outer retina are implicated in retinal aging and the pathogenesis of sight-threatening retinopathies, yet measuring outer retinal oxidative stress in vivo remains a challenge. Here, we test the hypothesis that continuously produced paramagnetic free radic...
journal_title:Investigative ophthalmology & visual science
pub_type: 杂志文章
doi:10.1167/iovs.15-18420
更新日期:2015-12-01 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:To determine whether basic fibroblast growth factor (bFGF) and transforming growth factor-beta 2 (TGF-beta 2) influence the contractile activity and the expression of alpha-smooth muscle actin (alpha-SMA) in bovine lens epithelial cells (LECs). To examine whether modulation of contractile activity by these grow...
journal_title:Investigative ophthalmology & visual science
pub_type: 杂志文章
doi:
更新日期:1995-07-01 00:00:00
abstract::Congenic mice of the MRL/Mp strain spontaneously develop an autoimmune connective tissue disease that shares immunologic and histopathologic features with the human disorders systemic lupus erythematosus, rheumatoid arthritis, and systemic vasculitis. The autoimmune disorder in these mice is markedly accelerated by th...
journal_title:Investigative ophthalmology & visual science
pub_type: 杂志文章
doi:
更新日期:1985-09-01 00:00:00
abstract:Purpose:We describe the spatial distribution and cross-sectional associations with physical and lifestyle attributes. Methods:The participants of the Montrachet (Maculopathy Optic Nerve, nuTRition neurovAsCular and HEarT) study underwent an exhaustive ophthalmologic examination, including optical coherence tomography,...
journal_title:Investigative ophthalmology & visual science
pub_type: 杂志文章,多中心研究
doi:10.1167/iovs.16-19958
更新日期:2016-08-01 00:00:00
abstract:PURPOSE:To investigate, using multifocal electroretinography (mfERG) and optical coherence tomography (OCT), potential spatial associations between local neuroretinal function and local retinal thickness in patients with diabetes. METHODS:Forty-five patients without retinopathy (10 with Type 1 diabetes; 35 with Type 2...
journal_title:Investigative ophthalmology & visual science
pub_type: 杂志文章
doi:10.1167/iovs.12-10293
更新日期:2012-09-12 00:00:00
abstract:PURPOSE:To determine whether the size and configuration of the optic chiasm in humans with albinism is different from that in normal control subjects. METHODS:Seventeen patients and 15 control subjects underwent magnetic resonance imaging of the entire head. Images were reformatted to the chiasm region and analyzed wi...
journal_title:Investigative ophthalmology & visual science
pub_type: 杂志文章
doi:10.1167/iovs.02-0156
更新日期:2003-01-01 00:00:00
abstract:PURPOSE:To quantitate in vivo retinal ganglion cell (RGC) survival after transient periods of pressure-induced ischemia of the rat retina and after different survival intervals. METHODS:In adult rats, RGCs were labeled with fluorogold applied to their main targets in the brain. Seven days later, in several groups of r...
journal_title:Investigative ophthalmology & visual science
pub_type: 杂志文章
doi:
更新日期:1996-09-01 00:00:00
abstract:PURPOSE:In the rabbit iris sphincter muscle, sodium nitroprusside (SNP), a nitric oxide (NO) donor, inhibits cholinergic contraction but does not affect tachykinergic contraction in vitro. The objectives of the current study were to clarify the mechanism for the different responsiveness to NO in cholinergic and tachyki...
journal_title:Investigative ophthalmology & visual science
pub_type: 杂志文章
doi:
更新日期:1997-08-01 00:00:00
abstract::The elastic fiber consists of several components: a central core of alpha-elastin and a microfibrillar sheath containing three components: fibrillin, microfibril-associated glycoprotein, and a 35-kD protein with amine oxidase activity. Elastin is a major component of the elastic fibers of the extracellular matrix (ECM...
journal_title:Investigative ophthalmology & visual science
pub_type: 杂志文章
doi:
更新日期:1992-09-01 00:00:00
abstract:PURPOSE:We studied the correlation between outer nuclear layer (ONL) thickness and cone density in normal eyes and eyes with retinitis pigmentosa (RP). METHODS:Spectral-domain optical coherence tomography (SD-OCT) scans were acquired using a displaced pupil entry position of the scanning beam to distinguish Henle's fi...
journal_title:Investigative ophthalmology & visual science
pub_type: 杂志文章,随机对照试验
doi:10.1167/iovs.14-15521
更新日期:2014-12-16 00:00:00
abstract:PURPOSE:To investigate the long-term effects of transient ligature of the ophthalmic vessels (LOV) on the inner and outer retina as well as on retinotectal projection, and whether brimonidine (BMD) has protective effects. METHODS:In adult rats, the left eye was subjected to 90 minutes of LOV. One hour before ischemia,...
journal_title:Investigative ophthalmology & visual science
pub_type: 杂志文章
doi:10.1167/iovs.05-0392
更新日期:2005-10-01 00:00:00
abstract:PURPOSE:To assess the impact of amblyopia, strabismus and glasses on subjective visual and psychological function among amblyopes. METHODS:Questionnaires were administered to 120 teenagers with amblyopia (cases), with residual amblyopia after treatment, or with or without strabismus and 120 control subjects (controls)...
journal_title:Investigative ophthalmology & visual science
pub_type: 杂志文章
doi:10.1167/iovs.05-1365
更新日期:2006-10-01 00:00:00
abstract::We evaluated the dose relationship between the antiproliferative and toxic effects of 5-fluorouracil (5-FU) on the ocular surface epithelium following experimental corneal epithelial wounding in rabbits. Central corneal epithelial defects 8 mm in diameter were made using n-heptanol. 5-FU (0.05 mg, 0.5 mg, or 5.0 mg pe...
journal_title:Investigative ophthalmology & visual science
pub_type: 杂志文章
doi:
更新日期:1987-10-01 00:00:00
abstract:PURPOSE:Modalities for inhibiting neovascularization may be one avenue to the development of effective therapies for retinopathy. The effect of squalamine, an antiangiogenic amino sterol, on oxygen-induced retinopathy (OIR) was assessed in a mouse model. METHODS:OIR was induced in C57BL6 mice by a 5-day exposure to 75...
journal_title:Investigative ophthalmology & visual science
pub_type: 杂志文章
doi:
更新日期:2000-05-01 00:00:00