Abstract:
PURPOSE:To evaluate a silk fibroin (SF) biomaterial as a substrate for corneal epithelial cell proliferation, differentiation, and stratification in vitro compared with denuded human amniotic membrane (AM). METHODS:Primary human and rabbit corneal epithelial cells and immortalized human corneal limbal epithelial cells were cultured on the SF and denuded AM, respectively. The biological cell behavior, including the morphology, proliferation, differentiation, and stratification, on the two substrates was compared and analyzed. RESULTS:Corneal epithelial cells can adhere and proliferate on the SF and denuded AM with a cobblestone appearance, abundant microvilli on the surface, and wide connection with the adjacent cells. MTT assay showed that cell proliferation on denuded AM was statistically higher than that on SF at 24 and 72 hours after plating (P = 0.001 and 0.0005, respectively). Expression of ΔNp63a and keratin 3/12 was detected in primary cell cultures on the two substrates with no statistical difference. When cultured at the air-liquid interface for 7 days, cells on SF could form a comparable stratified graft with a 2- to 3-cell layering, which compared similarly to AM cultures. CONCLUSIONS:SF, a novel biomaterial, could support corneal epithelial cells to proliferate, differentiate, and stratify, retaining the normal characteristic epithelium phenotype. Compared with AM, its unique features, including the transparency, ease of handling, and transfer, and inherent freedom from disease transmission, make it a promising substrate for corneal wound repair and tissue-engineering purposes.
journal_name
Invest Ophthalmol Vis Scijournal_title
Investigative ophthalmology & visual scienceauthors
Liu J,Lawrence BD,Liu A,Schwab IR,Oliveira LA,Rosenblatt MIdoi
10.1167/iovs.12-9876subject
Has Abstractpub_date
2012-06-26 00:00:00pages
4130-8issue
7eissn
0146-0404issn
1552-5783pii
iovs.12-9876journal_volume
53pub_type
杂志文章abstract:PURPOSE:Protein kinase C α (PKCα) is abundantly expressed in rod bipolar cells (RBCs) in the retina, yet the physiological function of PKCα in these cells is not well understood. To elucidate the role of PKCα in visual processing in the eye, we examined the effect of genetic deletion of PKCα on the ERG and on RBC light...
journal_title:Investigative ophthalmology & visual science
pub_type: 杂志文章
doi:10.1167/iovs.15-16622
更新日期:2015-07-01 00:00:00
abstract:PURPOSE:Bicarbonate transport plays a role in aqueous humor (AH) secretion. The authors examined bicarbonate transport mechanisms and carbonic anhydrase (CA) in porcine nonpigmented ciliary epithelium (NPE). METHODS:Cytoplasmic pH (pH(i)) was measured in cultured porcine NPE loaded with BCECF. Anion exchanger (AE), so...
journal_title:Investigative ophthalmology & visual science
pub_type: 杂志文章
doi:10.1167/iovs.08-2487
更新日期:2009-04-01 00:00:00
abstract:Purpose:Diabetic retinopathy (DR) is a leading cause of vision impairment and blindness worldwide in the working-age population, and the incidence is rising. Until now it has been difficult to define initiating events and disease progression at the molecular level, as available diabetic rodent models do not present the...
journal_title:Investigative ophthalmology & visual science
pub_type: 杂志文章
doi:10.1167/iovs.61.2.43
更新日期:2020-02-07 00:00:00
abstract:PURPOSE:To develop a new test of activities of daily living (ADLs) appropriate for the low-vision population: the Melbourne Low-Vision ADL Index (MLVAI). METHODS:The MLVAI was designed as a desk-based clinical assessment, comprising 18 observed items on complex ADLs in part (a) and 9 questions on broad self-care ADLs ...
journal_title:Investigative ophthalmology & visual science
pub_type: 杂志文章
doi:
更新日期:2001-05-01 00:00:00
abstract:PURPOSE:To determine whether glaucoma alters intrinsically photosensitive retinal ganglion cell (ipRGC) function. METHODS:Forty-one patients (25 with glaucoma and 16 healthy age-matched control participants) were tested. Intrinsically photosensitive retinal ganglion cell function was directly measured by the sustained...
journal_title:Investigative ophthalmology & visual science
pub_type: 杂志文章
doi:10.1167/iovs.10-7069
更新日期:2011-06-21 00:00:00
abstract:PURPOSE:To investigate the human disease due to CRB1 mutations and compare results with the Crb1-mutant rd8 mouse. METHODS:Twenty-two patients with CRB1 mutations were studied. Function was assessed with perimetry and electroretinography (ERG) and retinal structure with optical coherence tomography (OCT). Cortical str...
journal_title:Investigative ophthalmology & visual science
pub_type: 杂志文章
doi:10.1167/iovs.11-7701
更新日期:2011-08-29 00:00:00
abstract:PURPOSE:To develop an imaging technique that maps the distribution of free cystine in the rat lens at subcellular resolution and enables cystine accumulation to be compared with the expression of the cystine-glutamate exchanger (Xc-). METHODS:Whole lenses were fixed, cryoprotected, and then cryosectioned in either an ...
journal_title:Investigative ophthalmology & visual science
pub_type: 杂志文章
doi:10.1167/iovs.06-0861
更新日期:2007-03-01 00:00:00
abstract::We have investigated alterations of the metabolic state in vitamin A-deficient (A-) corneas using phosphorus-31 (31P) nuclear magnetic resonance (NMR) spectroscopy. Comparing to the control, A- corneas showed a prominent rise of phosphocreatine (PCr) as well as a total loss of glycerophosphorylcholine (GPC). Further, ...
journal_title:Investigative ophthalmology & visual science
pub_type: 杂志文章
doi:
更新日期:1989-04-01 00:00:00
abstract:PURPOSE:Recent studies on ocular shape have raised increased interest in the peripheral characteristics of the eye, as it potentially triggers changes in the central vision. Current techniques are, however, not capable of accurately measuring the three-dimensional shape of the retina. We describe a new magnetic resonan...
journal_title:Investigative ophthalmology & visual science
pub_type: 杂志文章
doi:10.1167/iovs.14-15161
更新日期:2015-01-15 00:00:00
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journal_title:Investigative ophthalmology & visual science
pub_type: 杂志文章,多中心研究,随机对照试验
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abstract:PURPOSE:The epidermal growth factor receptor (EGFR) appears in astrocytes after neural injury. The authors' laboratory has reported the presence of EGFR in glaucomatous optic nerves. The activation of EGFR is often associated with induction of cyclooxygenase (COX)-2. In this study, the induction of COX-2 pathway in rat...
journal_title:Investigative ophthalmology & visual science
pub_type: 杂志文章
doi:10.1167/iovs.04-1473
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abstract::Iron is a potent generator of oxidative damage whose levels increase with age, potentially exacerbating age-related diseases. Several lines of evidence suggest that iron accumulation may be a factor in age-related macular degeneration (AMD). AMD retinas have more iron within the photoreceptors, RPE, and drusen than do...
journal_title:Investigative ophthalmology & visual science
pub_type:
doi:10.1167/iovs.06-0568
更新日期:2006-11-01 00:00:00
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journal_title:Investigative ophthalmology & visual science
pub_type: 杂志文章
doi:10.1167/iovs.17-21535
更新日期:2017-08-01 00:00:00
abstract::During the past decade, ambient ultraviolet radiation has been implicated in the age-related increase in fluorescence and pigmentation of the human lens nucleus. 8-Methoxypsoralen (8-MOP) (currently in vogue for the treatment of psoriasis) is a well-known photosensitizing agent. This drug lar fluorescence (360/440 nm....
journal_title:Investigative ophthalmology & visual science
pub_type: 杂志文章
doi:
更新日期:1977-11-01 00:00:00
abstract::Swollen rabbit corneas incubated in vitro with their posterior surfaces blocked with silicone oil maintained fairly constant thickness over an 11 hr. period. Increasing the simulated intraocular pressure from 10 to 30 mm. Hg did not produce stromal thinning. When theophylline was added to stimulate epithelial Cl secre...
journal_title:Investigative ophthalmology & visual science
pub_type: 杂志文章
doi:
更新日期:1977-10-01 00:00:00
abstract::Sodium iodate and sodium iodoacetate were employed as biological probes to evaluate component forces contributing to the strength of retinal adhesion to the retinal pigment epithelium (RPE). Iodate treatment produced a rapid reduction in the strength of adhesion, which was complete within 1 hr without evidence of conc...
journal_title:Investigative ophthalmology & visual science
pub_type: 杂志文章
doi:
更新日期:1980-12-01 00:00:00
abstract:PURPOSE:To assess the effects of diabetes mellitus on corneal structure and function. METHODS:The authors measured endothelial permeability to fluorescein and corneal deswelling for 7.5 hours after 2 hours of hypoxic contact lens wear in 20 patients with diabetes who had nonproliferative retinopathy and 21 age-matched...
journal_title:Investigative ophthalmology & visual science
pub_type: 杂志文章
doi:
更新日期:1995-03-01 00:00:00
abstract:PURPOSE:Adeno-associated virus serotype 2 (AAV2) has been shown to be effective in transducing inner retinal neurons after intravitreal injection in several species. However, results in nonprimates may not be predictive of transduction in the human inner retina, because of differences in eye size and the specialized mo...
journal_title:Investigative ophthalmology & visual science
pub_type: 杂志文章
doi:10.1167/iovs.10-6250
更新日期:2011-04-25 00:00:00
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journal_title:Investigative ophthalmology & visual science
pub_type: 杂志文章
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更新日期:2016-07-01 00:00:00
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journal_title:Investigative ophthalmology & visual science
pub_type: 杂志文章
doi:10.1167/iovs.07-1234
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abstract::Neodymium: yttrium aluminum garnet (Nd:YAG) laser transscleral cyclophotocoagulation has been shown to be an effective method of lowering intraocular pressure (IOP). Transmission and absorption features of diode laser radiation (810 nm) make these new laser sources suitable for production of transscleral thermal lesio...
journal_title:Investigative ophthalmology & visual science
pub_type: 杂志文章
doi:
更新日期:1991-04-01 00:00:00
abstract:PURPOSE:To study the damaging effect of UV-A irradiation on the chaperone-like properties of alpha-crystallin and the subsequent recovery process of young and old bovine lenses. METHODS:Young and old bovine lenses were kept in organ culture. After 24 hours of incubation they were irradiated with UV-A at 365 nm, and op...
journal_title:Investigative ophthalmology & visual science
pub_type: 杂志文章
doi:
更新日期:2000-01-01 00:00:00
abstract::Corneas of fetal and young albino rabbits were examined by light and transmission electron microscopy. In addition, DNA and hydroxyproline content were measured in developing stroma. The results were compared with similar data from healing corneas in adult rabbits and from developing corneas of other animal species. I...
journal_title:Investigative ophthalmology & visual science
pub_type: 杂志文章
doi:
更新日期:1983-05-01 00:00:00
abstract:PURPOSE:To assess cross-sectional and longitudinal associations between exposure to Chlamydia pneumoniae infection and age-related macular degeneration (AMD) in the nested case-control sample drawn from the Blue Mountains Eye Study (BMES) cohort. METHODS:The BMES examined 3654 persons aged 49 to 97 years during 1992 t...
journal_title:Investigative ophthalmology & visual science
pub_type: 杂志文章
doi:10.1167/iovs.06-1434
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journal_title:Investigative ophthalmology & visual science
pub_type: 杂志文章
doi:10.1167/iovs.10-7055
更新日期:2011-07-15 00:00:00
abstract:PURPOSE:To determine whether polyamines are present in corneal cells, whether corneal cell polyamines can be depleted by blocking the first rate-limiting enzyme in the polyamine synthesis pathway, ornithine decarboxylase (ODC), and whether polyamines are required for proliferation in all three corneal cell types. METH...
journal_title:Investigative ophthalmology & visual science
pub_type: 杂志文章
doi:10.1167/iovs.02-0889
更新日期:2003-06-01 00:00:00
abstract:Purpose:Melanopsin expressing intrinsically photosensitive retinal ganglion cells (ipRGC) input to multiple brain regions including those for pupil control, circadian rhythms, sleep and mood regulation. Here we measured ipRGC function and its relationship to sleep quality and depression in patients with advanced AMD. ...
journal_title:Investigative ophthalmology & visual science
pub_type: 杂志文章
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更新日期:2017-02-01 00:00:00
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journal_title:Investigative ophthalmology & visual science
pub_type: 杂志文章
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更新日期:2005-08-01 00:00:00
abstract::In order to investigate the effect of traction of the vasculature on induction or acceleration of neovascularization, the chorioallantoic membranes (CAMs) of the developing chick embryo were placed under tension with 10-0 nylon sutures and subsequently examined histologically. In the initial phase of the study, CAMs f...
journal_title:Investigative ophthalmology & visual science
pub_type: 杂志文章
doi:
更新日期:1989-04-01 00:00:00
abstract::Retinoblastoma patients have cellular and humoral reactivity towards antigens expressed on retinoblastoma cells. We report the ultrastructural, cytogenetic, and immunologic features of four new retinoblastoma derived tissue culture cell lines. Studies with hybridoma produced monoclonal antibodies demonstrate that thes...
journal_title:Investigative ophthalmology & visual science
pub_type: 杂志文章
doi:
更新日期:1984-01-01 00:00:00