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Страница 1 од 293 резултати
Transcytotic passage of albumin through lens epithelial cells.
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OBJECTIVE
To characterize the transcytotic passage of albumin through lens epithelial cells.
METHODS
N/N 1003A rabbit lens epithelial cells were grown to a confluent monolayer on porous filter supports (Transwell Corning, Inc., Corning, NY). Monolayers were exposed apically to Alexa 488-labeled
Albumin adsorption to contact lens materials: a review.
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During contact lens wear, tear film components such as lipids, mucins and proteins tend to deposit on and within the lens material and may cause discomfort, reduced vision and inflammatory reactions. The tear film protein that has attracted most interest when studying contact lens deposition is the
Drug uptake and release by a hydrogel intraocular lens and the human crystalline lens.
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Implantation of a hydrogel (IOGEL) intraocular lens in humans has been reported. The polyhydroxyethyl methacrylate (poly HEMA) matrix of this hydrogel is permeable to water soluble drugs and may adsorb agents used intracamerally during cataract extraction or topically during the postoperative
Changes in the refractive index of lens fibre membranes during maturation--impact on lens transparency.
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OBJECTIVE
Local variations in refractive index are the physical cause of light scattering in a material or tissue and also induce phase changes of propagating light waves. The goal of this study was to analyse local differences in refractive index by phase contrast microscopy of sections of human
Biochemical factors in the lens opacities. Case-control study. The Lens Opacities Case-Control Study Group.
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OBJECTIVE
To evaluate associations with biochemical indicators of nutritional and other risk factors in the Lens Opacities Case-Control Study.
METHODS
Case-control study.
METHODS
The Lens Opacities Case-Control Study determined risk factors for cortical, nuclear, and posterior subcapsular opacities
Tear analysis in contact lens wearers.
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Tear analysis in contact lens wearers was compared with tear analysis in aphakics without contact lens wear and normal phakic patients. Subjects were divided into five groups: group 1, aphakic without contact lens; group 2, phakic with daily-wear hard contact lens; group 3, phakic with daily-wear
Spontaneous generation of superoxide anion by human lens proteins and by calf lens proteins ascorbylated in vitro.
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The proteins isolated from aged human lenses and brunescent cataracts exhibit extensive disulfide bond formation. Diabetic rat lenses similarly contain disulfide-bonded protein aggregates. These observations are consistent with the known link between diabetes, glycation and oxidative damage, and
Contact lens interactions with the tear film.
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Biochemical changes brought about by the influence of the contact lens on the tear film are conveniently split into two categories. Firstly, the lens can remove or reduce the levels of specific components in the tear film, and secondly, the lens can augment the tear film, by stimulating the influx
Imaging protein deposits on contact lens materials.
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OBJECTIVE
The majority of studies investigating protein deposition on contact lens materials require that the deposit of interest be removed, potentially resulting in erroneous results if some proteins are not removed adequately. The purpose of this study was to investigate the use of in situ
Post-translational arginylation in the bovine lens.
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This study demonstrates post-translational arginylation of bovine serum albumin and endogenous lens proteins by bovine lens arginyl-tRNA:protein transferase. This reaction has been proposed to be the first step in marking specific proteins for degradation by the non-lysosomal, ATP-dependent,
Amoebicidal effects of contact lens disinfecting solutions.
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OBJECTIVE
To compare the traditional manual hemacytometer method and an automated counter (Vi-cell) to enumerate and distinguish between viable and non-viable amoeba, and to determine the efficacies of contact lens (CL) disinfecting solutions against three species of Acanthamoeba. The efficacies in
Hydrogel lens monomer constituents modulate protein sorption.
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OBJECTIVE
To examine the effect of hydrogel lens monomer constituents on protein sorption.
METHODS
A series of hydroxyethylmethacrylate (HEMA)-based hydrogels with various amounts of methacrylic acid (MAA) or N-vinyl pyrrolidone (NVP) were synthesized. A radiolabel tracer technique was used to
In vivo passage of albumin from the aqueous humor into the lens.
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OBJECTIVE
To determine if albumin, the major protein component of the aqueous humor, passes into the lens in vivo.
METHODS
Rat albumin was covalently-labeled with Alexa 488 fluorophore, purified by gel permeation chromatography, then injected into the aqueous chamber of living rats. At 5 min
Albumin in the Vitreous Body, Retina and Lens of Human Fetal Eye.
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The content of serum albumin was evaluated in the vitreous body, retina, and lens of human fetuses of 14, 16, 17, 18 and 24 weeks of gestation. Albumin was detected in these tissues. PCR analysis revealed no albumin mRNA in the retina or in the lens, while in fetal liver (control) mRNA for this
Fibronectin concentration in tears of contact lens wearers.
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The tears of soft contact lens wearers (wearing lenses on an extended were schedule) were analysed for the amount of fibronectin, albumin and total protein. Tears were collected during the day without stimulation and the levels were then compared to levels in non-contact lens wearers tears. The
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