Abstract:
PURPOSE:The betaB2-crystallin gene (Crybb2) is expressed at an increasing level in the postnatal lens cortex. It has been assumed that the gene functions as structural protein, although this has not been directly tested. Here the in vivo functions of betaB2-crystallin are examined via the generation of mice with a targeted disruption of Crybb2. METHODS:Gene targeting in embryonic stem cells was used to generate mouse lines in which Crybb2 was deleted. Gene structure and protein expression were analyzed by PCR, immunoblot, and two-dimensional gel electrophoresis. Knockout mice were screened for cataract with slit lamp biomicroscopy. Microstructure of lens was analyzed by scanning and transmission electron microscopy. The resistance of crystallins in knockout mice to heat-induced denaturation and oxidative stress was examined. RESULTS:The lens appeared to develop normally in the first months of life. In older animals, the weight and axial diameter of the lenses of knockout mice were significantly smaller than in wild-type mice. Cataracts were formed in the posterior and anterior cortex several months after birth and cataract severity increased with age. The thermal stability of the supernatant of a lens homogenate was mildly compromised. The knockout lenses also showed decreased resistance to oxidative stress. CONCLUSIONS:BetaB2-crystallin is not essential for the normal development of a transparent lens in the mouse. It plays an increasingly important role in maintaining the transparency of the lens after birth, possibly by interacting with other crystallins to increase their resistance to thermal denaturation and oxidative stress.
journal_name
Invest Ophthalmol Vis Scijournal_title
Investigative ophthalmology & visual scienceauthors
Zhang J,Li J,Huang C,Xue L,Peng Y,Fu Q,Gao L,Zhang J,Li Wdoi
10.1167/iovs.08-2179subject
Has Abstractpub_date
2008-12-01 00:00:00pages
5476-83issue
12eissn
0146-0404issn
1552-5783pii
iovs.08-2179journal_volume
49pub_type
杂志文章abstract:PURPOSE:To study relationships between glaucoma-sensitive components identified with frequency-domain analysis of global-flash multifocal electroretinogram (mfERG), regional retinal nerve fiber layer thickness (RNFLT), and local visual field sensitivity (VS). METHODS:Eleven macaque monkeys, including four controls and...
journal_title:Investigative ophthalmology & visual science
pub_type: 杂志文章
doi:10.1167/iovs.10-6667
更新日期:2011-06-01 00:00:00
abstract::The monoclonal antibody GRC1 was obtained by immunizing BALB/c mice with human cornea. Screening was performed by indirect immunofluorescence in cryostatic sections of several tissues: cornea, skin, placenta, hyaline cartilage, blood vessels, and nerves. GRC1 was seen to recognize fibrillar structures in all of these ...
journal_title:Investigative ophthalmology & visual science
pub_type: 杂志文章
doi:
更新日期:1990-02-01 00:00:00
abstract::The effects of oral immunization with a recombinant vaccine expressing chlamydial lipopolysaccharide (LPS) on subsequent ocular challenge with Chlamydia trachomatis were studied in cynomolgus monkeys. Groups of four or five monkeys were given an oral vaccine containing 5 X 10(8) parent or recombinant Escherichia coli ...
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:The study aimed to provide a quantitative description of aqueous humor dynamics in healthy rat eyes. Methods:One eye of 26 anesthetized adult Brown-Norway rats was cannulated with a needle connected to a perfusion pump and pressure transducer. Pressure-flow data were measured in live and dead eyes by varying p...
journal_title:Investigative ophthalmology & visual science
pub_type: 杂志文章
doi:10.1167/iovs.17-22915
更新日期:2018-05-01 00:00:00
abstract:PURPOSE:The objective of this study was to characterize the morphology of the anterior opacities formed during recovery from posterior subcapsular cataract (PSC) in Royal College of Surgeons (RCS) rats. METHODS:Lenses from RCS rats at 8 and 12 weeks postnatal (n = 14 and 12, respectively) were examined under a dissect...
journal_title:Investigative ophthalmology & visual science
pub_type: 杂志文章
doi:
更新日期:1999-03-01 00:00:00
abstract::Previous investigations have shown that corneal epithelium, migrating to cover a wound, synthesizes protein and glycoprotein at a faster rate than does normal stratified epithelium. The authors have found that the maximal rate of synthesis, as indicated by the incorporation of leucine and glucosamine, occurs 16 hr aft...
journal_title:Investigative ophthalmology & visual science
pub_type: 杂志文章
doi:
更新日期:1986-01-01 00:00:00
abstract:Purpose:Geographic atrophy (GA) is the late stage of non-neovascular age-related macular degeneration. A lack of animal models for GA has hampered treatment efforts. Presented herein is a rat model for GA using subretinal injection of sodium iodate (NaIO3). Methods:Rats were given subretinal injections of NaIO3 (5 μg/...
journal_title:Investigative ophthalmology & visual science
pub_type: 杂志文章
doi:10.1167/iovs.18-24245
更新日期:2018-03-20 00:00:00
abstract:Purpose:The present study investigated retinal glia and choroidal vessels in flatmounts and sections from individuals with clinically diagnosed Stargardt disease (STGD). Methods:Eyes from three donors clinically diagnosed with STGD were obtained through the Foundation Fighting Blindness (FFB). Genetic testing was perf...
journal_title:Investigative ophthalmology & visual science
pub_type: 杂志文章
doi:10.1167/iovs.61.8.27
更新日期:2020-07-01 00:00:00
abstract::It is possible to record a pattern electroretinogram (PERG) of near normal amplitude in a situation when the eye containing the active electrode is occluded. Because PERG recording requires high amplification and sensitive signal retrieval techniques, the electrode in the occluded eye records a distant potential from ...
journal_title:Investigative ophthalmology & visual science
pub_type: 杂志文章
doi:
更新日期:1983-06-01 00:00:00
abstract:PURPOSE:To apply tissue-engineered cell sheet transplantation after excimer laser keratectomy as a novel approach for the reduction of postoperative corneal haze. METHODS:Limbal biopsy specimens were obtained, and epithelial cells were cultured on temperature-responsive culture inserts without the use of feeder cells....
journal_title:Investigative ophthalmology & visual science
pub_type: 杂志文章
doi:10.1167/iovs.05-0995
更新日期:2006-02-01 00:00:00
abstract:PURPOSE:To design a contrast sensitivity perimetry (CSP) protocol that decreases variability in glaucomatous defects while maintaining good sensitivity to glaucomatous loss. METHODS:Twenty patients with glaucoma and 20 control subjects were tested with a CSP protocol implemented on a monitor-based testing station. In ...
journal_title:Investigative ophthalmology & visual science
pub_type: 杂志文章
doi:10.1167/iovs.07-1205
更新日期:2008-07-01 00:00:00
abstract:PURPOSE:To investigate the role of intralysosomal redox-active iron in oxidative stress-induced damage in trabecular meshwork (TM) cells. METHODS:Chronic oxidative stress was applied using the hyperoxic model; acute oxidative stress was applied with H(2)O(2). Microarray analysis was performed using microarrays. mRNA a...
journal_title:Investigative ophthalmology & visual science
pub_type: 杂志文章
doi:10.1167/iovs.10-5410
更新日期:2010-12-01 00:00:00
abstract:Purpose:To elucidate the molecular events in solute carrier family 4 member 11 (SLC4A11)-deficient corneal endothelium that lead to the endothelial dysfunction that characterizes the dystrophies associated with SLC4A11 mutations, congenital hereditary endothelial dystrophy (CHED) and Fuchs endothelial corneal dystrophy...
journal_title:Investigative ophthalmology & visual science
pub_type: 杂志文章
doi:10.1167/iovs.61.8.39
更新日期:2020-07-01 00:00:00
abstract::An animal model has been developed to study the effects of various prophylaxis agents on acquisition of chlamydial conjunctivitis. When Hartley strain newborn guinea pigs received ocular inoculations of Chlamydia psittaci followed by the instillation of various agents, 1% AgNO3 significantly lowered the risk of develo...
journal_title:Investigative ophthalmology & visual science
pub_type: 杂志文章
doi:
更新日期:1987-09-01 00:00:00
abstract:Purpose:To investigate the association of microRNA (miRNA) copy number variants (CNVs) with acute anterior uveitis (AAU) with or without ankylosing spondylitis (AS) and to assess underlying disease mechanisms. Methods:This study included 768 patients with AAU+AS+ or AAU+AS- and 660 controls from a Chinese Han populati...
journal_title:Investigative ophthalmology & visual science
pub_type: 杂志文章
doi:10.1167/iovs.16-21047
更新日期:2017-04-01 00:00:00
abstract:Purpose:To explore patterns of disease progression in nonneovascular age-related macular degeneration (AMD) associated with hyperreflective crystalline deposits (HCDs) in the sub-retinal pigment epithelium-basal laminar space. Methods:Retrospective review of medical records, multimodal imaging, and longitudinal eye-tr...
journal_title:Investigative ophthalmology & visual science
pub_type: 杂志文章
doi:10.1167/iovs.19-26589
更新日期:2019-07-01 00:00:00
abstract:PURPOSE:Adhesion molecules play a critical role in leukocyte emigration to wound sites, but differences are evident in different vascular beds. In this study, the contributions of P-selectin to neutrophil emigration into the cornea after central epithelial abrasion were investigated. METHODS:Re-epithelialization, neut...
journal_title:Investigative ophthalmology & visual science
pub_type: 杂志文章
doi:10.1167/iovs.06-0381
更新日期:2006-11-01 00:00:00
abstract:PURPOSE:Aquaporin (AQP) is a hexahelical integral membrane protein that functions as a constitutive channel for water and regulated channel for cations in fluid transporting tissues, including many in the eye. Although AQP1 has been cloned from a cDNA library prepared from cultures of retinal pigment epithelial (RPE) c...
journal_title:Investigative ophthalmology & visual science
pub_type: 杂志文章
doi:10.1167/iovs.03-0001
更新日期:2003-06-01 00:00:00
abstract:Purpose:Patients with diabetes mellitus are reported to have ocular surface defects, impaired ocular surface barrier function, and a higher incidence of corneal and conjunctival infections. Tight junctions are critical for ocular surface barrier function. The present study was designed to investigate the effect of high...
journal_title:Investigative ophthalmology & visual science
pub_type: 杂志文章
doi:10.1167/iovs.61.11.3
更新日期:2020-09-01 00:00:00
abstract:PURPOSE:Platelet-derived growth factor (PDGF) is an important stimulatory factor for proliferative retinopathies. Expression of PDGF-B in the retinas of transgenic mice (hemizygous rho/PDGF-B mice) results in rapid-onset retinal detachment caused by proliferation of glial cells, endothelial cells, and pericytes, wherea...
journal_title:Investigative ophthalmology & visual science
pub_type: 杂志文章
doi:10.1167/iovs.02-1143
更新日期:2003-08-01 00:00:00
abstract:OBJECTIVE:To investigate the role of macrophages in the development of laser-induced choroidal neovascularization (CNV) by selective depletion with liposomal clodronate (Cl(2)MDP-LIP). METHODS:Laser photocoagulation was used to induce CNV in wild-type C57BL/6J mice. Animals were treated with intravenous (IV) and/or su...
journal_title:Investigative ophthalmology & visual science
pub_type: 杂志文章
doi:10.1167/iovs.03-0097
更新日期:2003-08-01 00:00:00
abstract::The activities of Mg(2+)-dependent and Na(+)-K(+)-stimulated ATPase in homogenates of rat retina were measured in the presence of increasing concentrations of oxidized glutathione (GSSG). The Mg(2+)-ATPase was not inhibited by GSSG at any of the concentrations tested. The Na(+)-K(+)-stimulated ATPase was not inhibited...
journal_title:Investigative ophthalmology & visual science
pub_type: 杂志文章
doi:
更新日期:1991-09-01 00:00:00
abstract::As part of an ophthalmic and anthropometric survey of two free-breeding rhesus monkey (Macaca mulatta) populations, intraocular pressure (IOP) of 114 animals was measured under ketamine catalepsia with the use of a floating-tip pneumatonometer. The mean IOP of the 102 animals included in the main analyses was 14.9 +/-...
journal_title:Investigative ophthalmology & visual science
pub_type: 杂志文章
doi:
更新日期:1979-08-01 00:00:00
abstract:Purpose:To evaluate the contribution of fixational saccades toward fixation instability in strabismic monkeys. Methods:Binocular eye movements were measured as six experimental monkeys (five strabismic monkeys and one monkey with downbeat nystagmus) and one normal monkey fixated targets of two shapes (Optotype, Disk) ...
journal_title:Investigative ophthalmology & visual science
pub_type: 杂志文章
doi:10.1167/iovs.17-22389
更新日期:2017-11-01 00:00:00
abstract:Purpose:This study evaluates the associations of haplotype-tagging single nucleotide polymorphisms (SNPs) in the PARL-ABCC5-HTR3D-HTR3C region with primary angle closure glaucoma (PACG), with a view to identify the responsible SNP in this region. Methods:Thirty SNPs from the PARL-ABCC5-HTR3D-HTR3C region were genotype...
journal_title:Investigative ophthalmology & visual science
pub_type: 杂志文章
doi:10.1167/iovs.17-22304
更新日期:2017-08-01 00:00:00
abstract:Purpose:To radiologically examine for the presence of bony remodeling of the orbit in thyroid eye disease (TED). Methods:Computed tomography (CT) scans of 248 orbits of 124 patients with TED and 185 orbits of 138 controls were retrospectively reviewed, and the following parameters measured: the angle of the inferomedi...
journal_title:Investigative ophthalmology & visual science
pub_type: 杂志文章
doi:10.1167/iovs.16-21035
更新日期:2017-05-01 00:00:00
abstract:PURPOSE:Increasing evidence indicates that the macular pigments (MP) protect the central retina and may retard macular disease. For that reason, a practical method for measuring MP that does not require elaborate optics and can be applied to diverse populations by operators with a modest amount of experience was develo...
journal_title:Investigative ophthalmology & visual science
pub_type: 杂志文章
doi:
更新日期:1999-10-01 00:00:00
abstract::In tear fluid, a large number of proteins can be detected with electrophoretic or immunologic techniques. The composition of serum proteins in tears resembles that of whole serum. By comparison of the protein patterns resulting from different sampling methods, it was shown that serum albumin is not present in the secr...
journal_title:Investigative ophthalmology & visual science
pub_type: 杂志文章
doi:
更新日期:1983-05-01 00:00:00
abstract::The adhesion complex of the corneal epithelium consists of the hemidesmosome and its associated structures, such as anchoring filaments, lamina densa of the basement membrane, and anchoring fibrils. It contributes to the adhesion of the corneal epithelium to Bowman's layer. To understand the adhesion complex better, a...
journal_title:Investigative ophthalmology & visual science
pub_type: 杂志文章
doi:
更新日期:1992-02-01 00:00:00
abstract:Purpose:To investigate the molecular pathways that drive thyroid stimulating hormone receptor (TSHR)-induced cellular proliferation in orbital fibroblasts (OFs) from thyroid eye disease (TED) patients. Methods:Orbital fibroblasts from TED and non-TED patients were treated with TSH and changes in gene expression and pr...
journal_title:Investigative ophthalmology & visual science
pub_type: 杂志文章
doi:10.1167/iovs.19-27865
更新日期:2019-10-01 00:00:00