26 - 50 of 182
Number of results to display per page
26 Levine, Edward M.Sonic hedgehog promotes rod photoreceptor differentiation in mammalian retinal cells in vitro.The hedgehog gene family encodes secreted proteins important in many developmental patterning events in both vertebrates and invertebrates. In the Drosophila eye disk, hedgehog controls the progression of photoreceptor differentiation in the morphogenetic furrow. To investigate whether hedgehog prot...Sonic hedgehog; Indian hedgehog; Desert hedgehog; Retina; Mitogenesis; Differentiation; Rod Photoreceptor1997-08-15
27 Olson, Randall J.Comparison of thermal features associated with 2 phacoemulsification machinesPURPOSE: To determine the thermal characteristics of the Legacy Advantec and Sovereign WhiteStar phacoemulsification machines during different clinically relevant scenarios. SETTING: In vitro study. METHODS: In water, temperature was recorded continuously on the sleeve in an artificial chamber, and ...Cataracts; Wound Burns; Thermal Characteristics2006-02
28 Zhang, KangExpression of wild type and mutant ELOVL4 in cell culture: subcellular localization and cell viabilityPURPOSE: ELOVL4 is a member of the fatty acid elongase (ELO) family of genes. Mutations of this gene are responsible for autosomal dominant Stargardt-like macular degeneration. However, the specific role of ELOVL4 in photoreceptor cells and the mechanism by which mutations in ELOVL4 causes macular d...Endoplasmic Reticulum; Green Fluorescent Proteins; Microscopy, Fluorescence2004
29 Baehr, WolfgangCharacterization of bovine rod outer segment G-proteinA simple modified procedure is described for isolating and purifying peripherally bound membrane proteins from bovine rod outer segment disks. The methods yield milligram quantities of G-protein and cGMP phosphodiesterase which are suitable for reconstitution with membranes containing visual pi...Heterotrimeric GTP-Binding Proteins; Macromolecular Substances; Rhodopsin1982
30 Baehr, WolfgangAnnotation and analysis of 10,000 expressed sequence tags from 3 mouse eye cDNA librariesBACKGROUND: As a biomarker of cellular activities, the transcriptome of a specific tissue or cell type during development and disease is of great biomedical interest. We have generated and analyzed 10,000 expressed sequence tags (ESTs) from three mouse eye tissue cDNA libraries: embryonic day 15.5 (...Cluster Analysis; DNA, Complementary; Gene Expression Profiling2003
31 Jones, Bryan W.Molecular phenotyping of retinal ganglion cellsClassifying all of the ganglion cells in the mammalian retina has long been a goal of anatomists, physiologists, and cell biologists. The rabbit retinal ganglion cell layer was phenotyped using intrinsic small molecule signals (aspartate, glutamate, glycine, glutamine, GABA, and taurine) and glutama...Aspartic Acid/metabolism; Image Cytometry/methods2002
32 Kriesel, John D.; Gooch, Willis M.; Pavia, Andrew T.Invasive sinonasal disease due to Scopulariopsis candida: case report and review of scopulariopsosis.Sinonasal infection with fungi of the order Mucorales--termed mucormycosis or zygomycosis--is sometimes seen in immunosuppressed patients, including those with diabetic ketoacidosis and malignancy. We describe a case of invasive sinonasal infection with Scopulariopsis candida (not among the Mucorale...Granulocyte Colony-Stimulating Factor; Itraconazole; Maxillary Sinus1994
33 Kriesel, John D.; Spruance, Spotswood L.Treatment of herpes simplex labialis.Recurrent herpes simplex labialis is associated with mild morbidity, but remains a significant problem for people with frequent and/or severe recurrences. Both topical and peroral episodic antiviral treatments of recurrences are modestly effective at reducing the duration of signs and symptoms. Rece...Randomized Controlled Trials; Steroids; Drug Administration Routes2002
34 Baehr, WolfgangExpression and mutagenesis of mouse rod photoreceptor cGMP phosphodiesteraseUsing recombinant baculovirus vectors, the three subunits of mouse rod photoreceptor cGMP phosphodiesterase (PDE) (alpha beta gamma 2) have been expressed in insect cells. The recombinant alpha,beta subunits accumulate to 5 mg/liter culture, but most (98%) of the expressed polypeptides are insoluble...Electrophoresis, Polyacrylamide Gel; Macromolecular Substances; Protein Processing, Post-Translational1994
35 Olson, Randall J.; Pingree, Michael F.; Lundergan, Maureen K.Penetrating keratoplasty for keratoconus: a long-term review of results and complicationsPURPOSE: To study the long-term complications of penetrating keratoplasty (PKP) to evaluate current recommendations to patients with keratoconus. SETTING: John Moran Eye Center, University of Utah, Salt Lake City, Utah, USA. METHODS: Retrospective study of all PKP procedures for keratoconus performe...Visual Acuity; Refraction, Ocular; Keratoconus; Astigmatism2000-07
36 Olson, Randall J.; Mamalis, Nick; Spencer, Terrence S.Postoperative sterile endophthalmitis (TASS) associated with the memorylensPURPOSE: To report 10 cases of delayed-onset acute intraocular inflammation following cataract extraction and posterior chamber implantation of the MemoryLens(R) intraocular lens (IOL). SETTING: John A. Moran Eye Center, Department of Ophthalmology, University of Utah, Salt Lake City, Utah, USA. MET...Memory Lens; Toxic Anterior Segment Syndrome; Retrospective Studies; adverse effects2000-12
37 Normann, Richard A.Background and bleaching adaptation in luminosity type horizontal cells in the isolated turtle retina1. The effects of background illumination and bleached photopigment on luminosity type horizontal cells were studied in the isolated turtle retina. 2. Background illumination, which produced less than 60% bleaching, hyperpolarized and desensitized the horizontal cells to a degree which depended upon...Turtles; Retina; Photoreceptors; Bleached photopigment; Dark Adaptation1990
38 Baehr, WolfgangGuanylyl cyclase activating protein. A calcium-sensitive regulator of phototransductionGuanylyl cyclase activating protein (GCAP1) has been proposed to act as a calcium-dependent regulator of retinal photoreceptor guanylyl cyclase (GC) activity. Using immunocytochemical and biochemical methods, we show here that GCAP1 is present in rod and cone photoreceptor outer segments where photo...Cloning, Molecular; DNA Primers; Molecular Sequence Data1995
39 Normann, Richard A.; Campbell, Patrick K.; Jones, Kelly E.100 electrode intracortical array: structural variabilityA technique has been developed for fabricating three dimensional "hair brush" electrode arrays from monocrystalline silicon blocks. Arrays consist of a square pattern of 100 penetrating electrodes, with 400 microns interelectrode spacing. Each electrode is 1.5mm in length and tapers from about 100 m...Microelectrode arrays; Stimulation; Micromachining1990
40 Olson, Randall J.Wound complications associated with incision enlargement for foldable intraocular lens implantation during cataract surgeryPURPOSE: To determine the relationship between various intraocular lens (IOL) types and the incidence of unwanted light images. SETTING: The Moran Eye Center, University of Utah, Salt Lake City, Utah, USA. METHODS: A telephone questionnaire was administered to 302 postoperative patients who had rece...Cararact Surgery; Incision Enlargement; Wound Complications; Vision Disorders2000-06
41 Frederick, Jeanne M.Inactivity of human β,β-carotene-9′, 10-′dioxygenase (BCO2) underlies retinal accumulation of the human macular carotenoid pigmentThe macula of the primate retina uniquely concentrates high amounts of the xanthophyll carotenoids lutein, zeaxanthin, and meso-zeaxanthin, but the underlying biochemical mechanisms for this spatial- and species-specific localization have not been fully elucidated. For example, despite abundant reti...2014-01-01
42 Normann, Richard A.Acute human brain responses to intracortical microelectrode arrays: challenges and future prospectsThe emerging field of neuroprosthetics is focused on the development of new therapeutic interventions that will be able to restore some lost neural function by selective electrical stimulation or by harnessing activity recorded from populations of neurons. As more and more patients benefit from thes...2014-01-01
43 Normann, Richard A.Adaptive parameter selection for asynchronous intrafascicular multi-electrode stimulationThis paper describes an adaptive algorithm for selecting perelectrode stimulus intensities and inter-electrode stimulation phasing to achieve desired isometric plantar-flexion forces via asynchronous, intrafascicular multi-electrode stimulation. The algorithm employed a linear model of force product...2012-01-01
44 Normann, Richard A.; Shah, Maulik R.Study of printed spiral coils for neuroprosthetic transcranial telemetry applicationsWe have explored the use of printed spiral coils (PSC's) for neuroprosthetic transcranial telemetry applications. We fabricated two-dimensional PSC's on a thin (25 microns) polyimide substrate using copper (35 microns) as a conducting material. All the coils had a fixed inner diameter of 1.0 cm. We ...Blindness; Neuroprosthesis; Transcranial Telemetry System; Prosthesis Design1998
45 Bernstein, Paul S.Evaluation of the G protein coupled receptor-75 (GPR75) in age related macular degeneration2001
46 Bernstein, Paul S.Biochemical characterization of the retinoid isomerase system of the eyeWe have previously shown that membranes from the retinal pigment epithelium can transform added all-trans-retinol into a mixture of 11-cis-retinoids, demonstrating the "missing reaction" in the visual cycle for the first time (Bernstein, P. S., Law, W. C., and Rando, R. R. (1987) Proc. Natl. Acad. S...Hydrogen-Ion Concentration1987
47 Olson, Randall J.Update on a long-term, prospective study of capsulotomy and retinal detachment rates after cataract surgeryPURPOSE: To evaluate the retinal detachment risks and neodymium:YAG (Nd:YAG) capsulotomy rates associated with different cataract approaches and intraocular lens (IOL) styles in a long-term,prospective clinical study. SETTING: Clinical practice of 1 ophthalmologist, Fort Collins, Colorado, USA. METH...Cataract Extraction; Laser Therapy; Retinal Detachment; Risk Factors2000-07
48 Olson, Randall J.; Crandall, Alan S.; Mamalis, NickIntraoperative miotics and posterior capsular opacification following phacoemulsification with intraocular lens insertionBACKGROUND AND OBJECTIVES: Posterior capsular opacification (PCO) is a frequent complication following phacoemulsification with intraocular lens (IOL) implantation. A series of consecutive patients receiving capsular bag-fixated, silicone IOL implants were assessed for both incidence of PCO and the ...Intraocular Lens; Nd:YAG Laser Capsulotomy; Miochol; Miostat; Phacoemulsification; Posterior Capsular Opacification1997-11
49 Zhang, KangLoss of ER retention and sequestration of the wild-type ELOVL4 by Stargardt disease dominant negative mutantsPURPOSE: Mutations in ELOVL4, a member of the fatty acid elongase (ELO) family, are responsible for autosomal dominant Stargardt-like macular degeneration. The specific role of ELOVL4 in photoreceptors and the degenerative events induced by dominant ELOVL4 mutations are not well understood. As a fir...Macular Degeneration; Transcription Factor CHOP; Molecular Chaperones2005
50 Normann, Richard A.; Horch, Kenneth W.; Cha, KichulMobility performance with a pixelized vision systemA visual prosthesis, based on electrical stimulation of the visual cortex, has been suggested as a means for partially restoring functional vision in the blind. The prosthesis would create a pixelized visual sense consisting of punctate spots of light (phosphenes). The present study investigated the...Visual Prosthesis; Mobility; Phosphene Simulator1992
26 - 50 of 182