Confirmation of the role of pneumolysin in ocular infections with Streptococcus pneumoniae.

Abstract:

:In earlier experiments on the role of the cytolytic toxin pneumolysin in ocular infections with pneumococcus, we found that a strain carrying a deletion in the gene encoding pneumolysin was considerably less virulent than wild type when tested in an intracorneal model of keratitis in the rabbit. To confirm this result, we have constructed a strain in which pneumolysin activity was restored by transformation of the deleted strain with a plasmid bearing the complete pneumolysin gene. Hemolytic titers of pneumolysin indicated that only one copy of the plasmid per bacterium expresses the pneumolysin gene in this strain. The virulence of this strain was compared with that of wild type and deleted strains transformed with the vector lacking the pneumolysin gene. Slit lamp examination (SLE) scores for eyes infected with the restored strain were similar to those for eyes infected with wild type and significantly greater than those for the pneumolysin-deleted strain. Molecular analysis of bacteria recovered from infected corneas showed that the vector plasmid was retained; however, in most isolates of the restored strain, the plasmid underwent an excision and lost the pneumolysin gene. The cloned gene apparently persisted long enough to induce the pathologic changes, and the results confirm the importance of pneumolysin as a virulence factor in ocular infections.

journal_name

Curr Eye Res

journal_title

Current eye research

authors

Johnson MK,Hobden JA,O'Callaghan RJ,Hill JM

doi

10.3109/02713689208999547

subject

Has Abstract

pub_date

1992-12-01 00:00:00

pages

1221-5

issue

12

eissn

0271-3683

issn

1460-2202

journal_volume

11

pub_type

杂志文章
  • Optimization of Cultured Human Corneal Endothelial Cell Sheet Transplantation and Post-Operative Sheet Evaluation in a Rabbit Model.

    abstract:PURPOSE:To optimize cultured human corneal endothelial cell (cHCEC) sheet transplantation technique for maintenance of cHCEC viability. MATERIALS AND METHODS:cHCEC sheets cultured on a collagen scaffold were covered with or without Viscoat® and exposed to humidified air in the incubator. cHCEC sheets with or without V...

    journal_title:Current eye research

    pub_type: 杂志文章

    doi:10.3109/02713683.2015.1101774

    authors: Yamaguchi M,Shima N,Kimoto M,Ebihara N,Murakami A,Yamagami S

    更新日期:2016-09-01 00:00:00

  • Flicker perimetry using a luminance threshold strategy at frequencies from 5-25 Hz in glaucoma, ocular hypertension and normal controls.

    abstract::A prototype automated flicker perimeter was used to investigate flicker luminance thresholds in glaucoma patients (n = 11), ocular hypertensives (high risk n = 10, low and intermediate risk n = 21) and normal controls (n = 10). Differential light sensitivity was measured for one eye of each subject using a flickering ...

    journal_title:Current eye research

    pub_type: 杂志文章

    doi:10.3109/02713689409047005

    authors: Austin MW,O'Brien CJ,Wishart PK

    更新日期:1994-10-01 00:00:00

  • Prevalence and Associations of Posterior Segment Manifestations in a Cohort of Egyptian Patients with Pathological Myopia.

    abstract::Purpose: To determine the prevalence of posterior segment manifestations among consecutive patients with pathological myopia attending our University Hospital general ophthalmology clinic and their association with age, refractive error, axial length and each other. Methods: Patients diagnosed with pathological myopia...

    journal_title:Current eye research

    pub_type: 杂志文章

    doi:10.1080/02713683.2019.1606252

    authors: Elnahry AG,Khafagy MM,Esmat SM,Mortada HA

    更新日期:2019-09-01 00:00:00

  • Ocular effects of a N,N-disubstituted 5-OH aminotetralin (N-0437): evidence for a dual mechanism of action.

    abstract::The selective DA2 agonist, N-0437, produced an acute reduction in intraocular pressure (IOP) and pupil diameter (PD) when applied topically to the eyes of normal monkeys. Ocular hypotension and miosis were primarily unilateral in nature, dose-related and lasted 3 to 5 hours following drug instillation. In normal monke...

    journal_title:Current eye research

    pub_type: 杂志文章

    doi:10.3109/02713688708997557

    authors: Crosson CE,Burke JA,Chan MF,Potter DE

    更新日期:1987-11-01 00:00:00

  • Diurnal and long-term variations in corneal thickness in the normal and alloxan-induced diabetic rabbit.

    abstract::The variation of central corneal thickness with age was measured weekly at 10am by ultrasound pachometry in 10 normal (5 to 19 weeks of age) and 10 alloxan-induced diabetic (9 to 19 weeks of age) rabbits. The diurnal variation of corneal thickness was also measured at 2 hour intervals for a period of 24 hours on both ...

    journal_title:Current eye research

    pub_type: 杂志文章

    doi:10.3109/02713689008999611

    authors: Herse PR

    更新日期:1990-05-01 00:00:00

  • Improving effects of topical administration of iganidipine, a new calcium channel blocker, on the impaired visual evoked potential after endothelin-1 injection into the vitreous body of rabbits.

    abstract:PURPOSE:To investigate the effect of topical iganidipine, a new dihydropyridine derivative calcium channel blocker, on impairment of the ocular circulation caused by endothelin-1 (ET-1), we examined modification of the effect of ET-1 on visual-evoked potential (VEP) in albino rabbits. METHODS:To clarify whether VEP co...

    journal_title:Current eye research

    pub_type: 杂志文章

    doi:

    authors: Oku H,Sugiyama T,Kojima S,Watanabe T,Ikeda T

    更新日期:2000-02-01 00:00:00

  • Esculetin Protects Human Retinal Pigment Epithelial Cells from Lipopolysaccharide-induced Inflammation and Cell Death.

    abstract:PURPOSE:Age-related macular degeneration (AMD) is the most common cause of visual loss. The dry AMD is characterized by retinal pigment epithelium (RPE) death and changes in AMD lead to severe loss of vision. Coumarin-derived esculetin has a number of therapeutic and pharmacological effects such as anti-inflammatory an...

    journal_title:Current eye research

    pub_type: 杂志文章

    doi:10.1080/02713683.2018.1481517

    authors: Ozal SA,Turkekul K,Gurlu V,Guclu H,Erdogan S

    更新日期:2018-09-01 00:00:00

  • Is another mannose receptor-like lectin present in retinal pigment epithelium?

    abstract:PURPOSE:This study was designed to investigate the presence of the secretory phospholipase A2 receptor in RPE, a protein closely related to the phagocytic mannose receptor. METHODS:Proteins from cultured rat, pig, and human RPE were separated by SDS-PAGE and immunoblotted with a polyclonal guinea pig sPLA2 receptor an...

    journal_title:Current eye research

    pub_type: 杂志文章

    doi:10.1076/ceyr.19.1.1.5345

    authors: Wilt SD,McLaughlin BJ

    更新日期:1999-07-01 00:00:00

  • Variability of retinal steepness at the posterior pole in children 7-15 years of age.

    abstract:PURPOSE:Considerable evidence suggests that both axial and peripheral refraction play important roles in eye growth control. The large variability in peripheral refraction seen in adults and children indicates that the peripheral retina is exposed to a wide range of refractive errors. The current lack of appropriate me...

    journal_title:Current eye research

    pub_type: 杂志文章

    doi:10.1076/ceyr.27.2.61.15454

    authors: Schmid GF

    更新日期:2003-07-01 00:00:00

  • Neuroprotective Effects of Psalmotoxin-1, an Acid-Sensing Ion Channel (ASIC) Inhibitor, in Ischemia Reperfusion in Mouse Eyes.

    abstract:PURPOSE:The purpose of the current study is to assess changes in the expression of Acid-Sensing Ion Channel (ASIC)1a and ASIC2 in retinal ganglion cells (RGCs) after retinal ischemia and reperfusion (I/R) injury and to test if inhibition of ASIC1a provides RGC neuroprotection. METHODS:Transient ischemia was induced in...

    journal_title:Current eye research

    pub_type: 杂志文章

    doi:10.1080/02713683.2018.1454478

    authors: Dibas A,Millar C,Al-Farra A,Yorio T

    更新日期:2018-07-01 00:00:00

  • Retinal neurodegeneration in diabetic peripheral neuropathy by optical coherence tomography: a systematic review and meta-analysis.

    abstract::Purpose: The optical coherence tomography (OCT) has been used to evaluate the changes of retinal degeneration in patients with diabetic peripheral neuropathy (DPN) in recent years, but the results of previous studies were controversial. Therefore, systematic review and meta-analysis were performed to evaluate the degr...

    journal_title:Current eye research

    pub_type: 杂志文章

    doi:10.1080/02713683.2021.1874025

    authors: Liu B,Wang W,Zhou R,Zeng X,Zhu Z

    更新日期:2021-01-11 00:00:00

  • Spontaneous Blinking Kinetics on Paralytic Lagophthalmos After Lid Load with Gold Weight or Autogenous Temporalis Fascia Sling.

    abstract:PURPOSE:To assess the upper eyelid kinematics during spontaneous blinking in unilateral paralytic lagophthalmos before and after upper eyelid load with gold weight (GW) or autogenous temporalis fascia (TF) sling. DESIGN:Comparative case series. SUBJECTS:Patients with long-standing unresolved unilateral facial palsy w...

    journal_title:Current eye research

    pub_type: 杂志文章,随机对照试验

    doi:10.3109/02713683.2015.1031252

    authors: Wambier SP,Garcia DM,Cruz AA,Messias A

    更新日期:2016-04-01 00:00:00

  • Effects of serotonergic compounds on aqueous humor dynamics in monkeys.

    abstract:PURPOSE:The effects of several serotonergic agonists on aqueous humor formation (AHF), total outflow facility (OF) and intraocular pressure (IOP) were investigated in living cynomolgus monkeys. METHODS:We determined the effect of a single topical unilateral 300 microg or 3 mg dose of the 5-HT agonists serotonin, 5-car...

    journal_title:Current eye research

    pub_type: 杂志文章

    doi:10.1076/ceyr.23.2.120.5477

    authors: Gabelt BT,Millar CJ,Kiland JA,Peterson JA,Seeman JL,Kaufman PL

    更新日期:2001-08-01 00:00:00

  • Oxidative stress on lens and cataract formation: role of light and oxygen.

    abstract::The mechanism of oxidative damage to the lens through intraocular photochemical generation of superoxide and its derivatization to other oxidants such as singlet oxygen, hydroxyl radical and hydrogen peroxide has been studied. Rat lenses when organ cultured aerobically in TC 199 containing additional amounts of ribofl...

    journal_title:Current eye research

    pub_type: 杂志文章,评审

    doi:10.3109/02713688408997186

    authors: Varma SD,Chand D,Sharma YR,Kuck JF Jr,Richards RD

    更新日期:1984-01-01 00:00:00

  • Ciliary neurotrophic factor induces glial fibrillary acidic protein in retinal Müller cells through the JAK/STAT signal transduction pathway.

    abstract:PURPOSE:Intravitreal injection of ciliary neurotrophic factor (CNTF) is known to induce glial intermediate filament protein (GFAP) expression in retinal Müller cells. Because CNTF binding can activate multiple signaling kinases, we have examined the involvement of JAK/STAT pathway in GFAP induction in Müller cells. ME...

    journal_title:Current eye research

    pub_type: 杂志文章

    doi:10.1076/ceyr.24.4.305.8408

    authors: Wang Y,Smith SB,Ogilvie JM,McCool DJ,Sarthy V

    更新日期:2002-04-01 00:00:00

  • Changes in the normal corneal endothelial cellular pattern as a function of age.

    abstract::Human endothelial morphologic changes were quantitated by specular microscopy and computer-assisted morphometry to establish normal baselines of various morphologic parameters. Cellular polymegethism and cellular pleomorphism increases with age, and normal baseline parameters are detailed. Furthermore, no significant ...

    journal_title:Current eye research

    pub_type: 杂志文章

    doi:10.3109/02713688509017661

    authors: Yee RW,Matsuda M,Schultz RO,Edelhauser HF

    更新日期:1985-06-01 00:00:00

  • Dry Eye-Related Visual Blurring and Irritative Symptoms and Their Association with Depression and Anxiety in Eye Clinic Patients.

    abstract:PURPOSE:Dry eye is a common condition known to have many systemic co-morbidities. We aim to report the frequency of depression and anxiety suspects in eye clinic patients and explore the association between dry eye signs and symptoms with depression and anxiety. MATERIALS AND METHODS:Adult outpatients were recruited f...

    journal_title:Current eye research

    pub_type: 杂志文章

    doi:10.3109/02713683.2015.1056804

    authors: Liyue H,Chiang PP,Sung SC,Tong L

    更新日期:2016-05-01 00:00:00

  • Fatty acid composition and arachidonic acid metabolism in vitreous lipids from canine and human eyes.

    abstract::About 55% of the acyl groups of dog and human vitreous are unsaturated fatty acids. The major components are oleate (18:1, n-9) and arachidonate (20:4, n-6) with moderate amounts of linoleate (18:2, n-6) and docosahexaenoate (22:6, n-3). Palmitate (16:0) and stearate (18:0) are the major saturated fatty acids. There a...

    journal_title:Current eye research

    pub_type: 杂志文章

    doi:10.3109/02713688609015113

    authors: Reddy TS,Birkle DL,Packer AJ,Dobard P,Bazan NG

    更新日期:1986-06-01 00:00:00

  • Protein kinase C-mediated regulation of matrix metalloproteinase and tissue inhibitor of metalloproteinase production in a human retinal müller cells.

    abstract:PURPOSE:Matrix metalloproteinases (MMPs) play an important role in the degradation of extracellular matrix (ECM) proteins in the retina. Breakdown of ECM proteins results in neovascularization and tractional retinal detachment, which eventually lead to the symptoms of proliferative diabetic retinopathy. Müller cells ar...

    journal_title:Current eye research

    pub_type: 杂志文章

    doi:10.3109/02713683.2012.682635

    authors: Miyata Y,Kase M,Sugita Y,Shimada A,Nagase T,Katsura Y,Kosano H

    更新日期:2012-09-01 00:00:00

  • Type I collagen accelerates the spreading of lens epithelial cells through the expression and activation of matrix metalloproteinases.

    abstract:PURPOSE:Matrix metalloproteinases (MMPs) are involved in posterior capsule opacification (PCO), but the mechanisms that promote MMP expression are yet to be determined. In this study, we investigated whether type I collagen, which is only detected in aged or cataractous lens capsules, affects the expression and activat...

    journal_title:Current eye research

    pub_type: 杂志文章

    doi:10.3109/02713683.2013.853194

    authors: Shimada A,Miyata Y,Kosano H

    更新日期:2014-05-01 00:00:00

  • Transforming growth factor-beta stimulates collagen and fibronectin synthesis by human corneal stromal fibroblasts in vitro.

    abstract::The effects of transforming growth factor-beta (TGF beta) and epidermal growth factor (EGF) on the synthesis of collagen and fibronectin, and on the proliferation of human corneal stromal fibroblasts in vitro, were evaluated. Human corneal stromal fibroblasts in culture were incubated for 48 hours with TGF beta or EGF...

    journal_title:Current eye research

    pub_type: 杂志文章

    doi:10.3109/02713689308995765

    authors: Ohji M,SundarRaj N,Thoft RA

    更新日期:1993-08-01 00:00:00

  • Effect of Congenital Lower Eyelid Epiblepharon Surgery on Asymmetric Margin Reflex Distance 1.

    abstract::Objectives: To investigate the characteristics of margin reflex distance 1 (MRD1) asymmetry in congenital lower eyelid epiblepharon and its resolution after surgical correction of epiblepharon. Methods: Among patients who underwent lower eyelid epiblepharon surgery from November 2015 to September 2017, patients with a...

    journal_title:Current eye research

    pub_type: 杂志文章

    doi:10.1080/02713683.2020.1857781

    authors: Yang MK,Kim N,Choung HK,Khwarg SI

    更新日期:2020-12-15 00:00:00

  • Short-Term Vitreoretinal Tamponade with Heavy Liquid Following Surgery for Giant Retinal Tear.

    abstract:PURPOSE:To study the efficacy and outcomes of short-term postoperative vitreoretinal tamponade with perfluorocarbon heavy liquid in patients with giant retinal tear. MATERIALS AND METHODS:The study group consisted of 13 consecutive patients (13 eyes) who presented with giant retinal tear at a tertiary medical center i...

    journal_title:Current eye research

    pub_type: 杂志文章

    doi:10.1080/02713683.2016.1266664

    authors: Eiger-Moscovich M,Gershoni A,Axer-Siegel R,Weinberger D,Ehrlich R

    更新日期:2017-07-01 00:00:00

  • Lectin-affinity isolation of microvillous membranes from the pigmented epithelium of rat retina.

    abstract::The pigmented epithelium of the vertebrate retina phagocytizes the discarded tips of photoreceptors and it is likely that a specific cellular recognition process is involved in this phenomenon. The apical surface of retinal pigmented epithelium (RPE) contains microvilli which interdigitate with the outer segment regio...

    journal_title:Current eye research

    pub_type: 杂志文章

    doi:10.3109/02713688709034868

    authors: Cooper NG,Tarnowski BI,McLaughlin BJ

    更新日期:1987-08-01 00:00:00

  • Characterization of the pupil light reflex, electroretinogram and tonometric parameters in healthy rat eyes.

    abstract:PURPOSE:To characterize the pupil light reflex (PLR), electroretinographic (ERG) and tonometric parameters in healthy rat eyes. METHODS:Brown Norway rats were used for experiments. The PLR was evaluated with a computerized pupillometer (n = 27), ERGs were recorded simultaneously from both eyes (n = 27) and IOP was mea...

    journal_title:Current eye research

    pub_type: 杂志文章

    doi:10.1076/ceyr.25.2.69.10156

    authors: Grozdanic S,Sakaguchi DS,Kwon YH,Kardon RH,Sonea IM

    更新日期:2002-08-01 00:00:00

  • Experimental preretinal neovascularization by laser-induced venous thrombosis in rats.

    abstract:PURPOSE:Retinal ischemia and neovascularization (NV) are important components of many retinal disorders. To facilitate further investigation of retinal ischemia and neovascularization, we sought to develop a reproducible in vivo experimental model of venous occlusion by photodynamic thrombosis in rats. METHODS:After a...

    journal_title:Current eye research

    pub_type: 杂志文章

    doi:10.1076/ceyr.16.1.26.5116

    authors: Saito Y,Park L,Skolik SA,Alfaro DV,Chaudhry NA,Barnstable CJ,Liggett PE

    更新日期:1997-01-01 00:00:00

  • MMP9 is involved in glycation end-products induced increase of retinal vascular permeability in rats and the therapeutic effect of minocycline.

    abstract:PURPOSE:To determine the role of matrix metalloproteinase 9 (MMP9) in advanced glycation end-products (AGEs) induced damage to blood-retinal barrier (BRB) and the therapeutic effects of minocycline, an MMP inhibitor, against the BRB damages. METHODS:Forty-eight Sprague Dawley rats were randomly assigned to 3 groups (1...

    journal_title:Current eye research

    pub_type: 杂志文章

    doi:10.1080/02713680802450984

    authors: Chen YD,Xu X,Xia X,Wu H,Liu K,Zheng Z,Zhu D

    更新日期:2008-11-01 00:00:00

  • Characteristics and Risk Factors for Pupillary Capture of Intraocular Lens in Congenital Ectopia Lentis.

    abstract::Importance: To analyze the characteristics and risk factors for pupillary capture (PC) of the intraocular lens (IOL) in congenital ectopia lentis (CEL) patients.Methods: Data of CEL patients who underwent lens extraction and intraocular implantation from 2013 to 2016 at Zhongshan Ophthalmic Center in China were collec...

    journal_title:Current eye research

    pub_type: 杂志文章

    doi:10.1080/02713683.2019.1668418

    authors: Jin G,Lin J,Xiao B,Chen A,Young CA,Zheng D

    更新日期:2020-04-01 00:00:00

  • Altered Functional Connectivity of the Primary Visual Cortex in Adult Comitant Strabismus: A Resting-State Functional MRI Study.

    abstract:PURPOSE:The aim of this study was to examine the functional connectivity between the primary visual cortex and other cortical areas during rest in normal subjects and patients with comitant strabismus using functional magnetic resonance imaging (fMRI). METHODS:A prospective, observational study was conducted. Ten pati...

    journal_title:Current eye research

    pub_type: 杂志文章

    doi:10.1080/02713683.2018.1540642

    authors: Yan X,Wang Y,Xu L,Liu Y,Song S,Ding K,Zhou Y,Jiang T,Lin X

    更新日期:2019-03-01 00:00:00

  • PGE2 synthesis and response pathways in cultured corneal endothelial cells: the effects of in vitro aging.

    abstract:PURPOSE:The purpose of these studies is to develop an in vitro model of corneal endothelial aging and to investigate age-related changes in morphology, mitosis, prostaglandin synthesis and prostaglandin response pathways. METHODS:First-passage rabbit corneal endothelial cells were grown in vitro for up to 30 days afte...

    journal_title:Current eye research

    pub_type: 杂志文章

    doi:10.1076/ceyr.16.5.428.7048

    authors: Jumblatt MM

    更新日期:1997-05-01 00:00:00