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https://www.readbyqxmd.com/read/29334156/the-retinal-ganglion-cell-layer-predicts-normal-appearing-white-matter-tract-integrity-in-multiple-sclerosis-a-combined-diffusion-tensor-imaging-and-optical-coherence-tomography-approach
#1
Carolina Alves, Sónia Batista, Otília C d'Almeida, Lívia Sousa, Luís Cunha, Rui Bernardes, Miguel Castelo-Branco
We investigated the relationship between retinal layers and normal-appearing white matter (WM) integrity in the brain of patients with relapsing-remitting multiple sclerosis (MS), using a combined diffusion tensor imaging and high resolution optical coherence tomography approach. Fifty patients and 62 controls were recruited. The patients were divided into two groups according to presence (n = 18) or absence (n = 32) of optic neuritis. Diffusion tensor data were analyzed with a voxel-wise whole brain analysis of diffusion metrics in WM with tract-based spatial statistics...
January 15, 2018: Human Brain Mapping
https://www.readbyqxmd.com/read/29333905/linear-nevus-sebaceous-syndrome-presenting-as-circumscribed-choroidal-hemangioma
#2
Jose J Echegaray, Rachel Chen, Claudine Bellerive, Arun D Singh
A 4-year-old female with a unilateral circumscribed choroidal hemangioma and secondary total exudative retinal detachment. A nasal skin scar-like lesion incised to confirm a histopathologic diagnosis of linear nevus sebaceous. Further imaging disclosed asymmetry of the lateral ventricle frontal horns, suggestive of the diagnosis of linear nevus sebaceous syndrome. The choroidal hemangioma was treated with I-125 episcleral brachytherapy (apical dose of 45 Gy). At 6 months post-radiation, the tumor showed regression with total resolution of exudative retinal detachment...
January 15, 2018: Ophthalmic Genetics
https://www.readbyqxmd.com/read/29333897/adherence-to-the-american-diabetes-association-retinal-screening-guidelines-for-population-with-diabetes-in-the-united-states
#3
JaeJin An, Fang Niu, Adam Turpcu, Yamina Rajput, T Craig Cheetham
PURPOSE: (1) To assess long-term adherence to American Diabetes Association guideline-recommended retinal screening among population with diabetes in the United States. (2) To determine factors associated with long-term adherence to routine eye screening exams. METHODS: A retrospective cohort study was conducted in adult patients with diabetes identified from January 2009 to December 2010. Patients were followed until disenrollment, death, or study end date (December 2013)...
January 15, 2018: Ophthalmic Epidemiology
https://www.readbyqxmd.com/read/29333896/cataract-surgery-in-hiv-seropositive-patients-long-term-follow-up
#4
Massimo Accorinti, Michela Cecere, Andrea Scala, Maria Pia Pirraglia
PURPOSE: To study epidemiology and clinical findings of cataract in HIV+ patients. METHODS: A total of 32 HIV+ patients, 11 with uveitis/retinitis before surgery and 21 without, mean follow-up 44.9 ± 36.6 months, and 114 HIV- patients, 57 with uveitis/retinitis before surgery and 57 without, were retrospectively compared. RESULTS: Visual acuity improved in all HIV+ patients (p < 0.001), who were younger (p = 0.01) and more frequently males (p = 0...
January 15, 2018: Ocular Immunology and Inflammation
https://www.readbyqxmd.com/read/29332249/correlation-of-flow-density-as-measured-using-optical-coherence-tomography-angiography-with-structural-and-functional-parameters-in-glaucoma-patients
#5
Maged Alnawaiseh, Larissa Lahme, Viktoria Müller, André Rosentreter, Nicole Eter
PURPOSE: To evaluate the correlation between flow density, as measured by optical coherence tomography angiography (OCTA), and structural and functional parameters in patients with open-angle glaucoma. METHODS: Thirty-four eyes of 34 patients with open-angle glaucoma and 35 eyes of 35 healthy subjects were prospectively included in this study. OCTA was performed using RTVue XR Avanti with AngioVue. The macula was imaged with a 3 × 3 mm scan and the optic nerve head (ONH) with a 4...
January 13, 2018: Graefe's Archive for Clinical and Experimental Ophthalmology
https://www.readbyqxmd.com/read/29332245/reprogramming-the-metabolome-rescues-retinal-degeneration
#6
REVIEW
Karen Sophia Park, Christine L Xu, Xuan Cui, Stephen H Tsang
Metabolomics studies in the context of ophthalmology have largely focused on identifying metabolite concentrations that characterize specific retinal diseases. Studies involving mass spectrometry (MS) and nuclear magnetic resonance (NMR) spectroscopy have shown that individuals suffering from retinal diseases exhibit metabolic profiles that markedly differ from those of control individuals, supporting the notion that metabolites may serve as easily identifiable biomarkers for specific conditions. An emerging branch of metabolomics resulting from biomarker studies, however, involves the study of retinal metabolic dysfunction as causes of degeneration...
January 13, 2018: Cellular and Molecular Life Sciences: CMLS
https://www.readbyqxmd.com/read/29332242/selective-ikk2-inhibitor-imd0354-disrupts-nf-%C3%AE%C2%BAb-signaling-to-suppress-corneal-inflammation-and-angiogenesis
#7
Anton Lennikov, Pierfrancesco Mirabelli, Anthony Mukwaya, Mira Schaupper, Muthukumar Thangavelu, Mieszko Lachota, Zaheer Ali, Lasse Jensen, Neil Lagali
Corneal neovascularization is a sight-threatening condition caused by angiogenesis in the normally avascular cornea. Neovascularization of the cornea is often associated with an inflammatory response, thus targeting VEGF-A alone yields only a limited efficacy. The NF-κB signaling pathway plays important roles in inflammation and angiogenesis. Here, we study consequences of the inhibition of NF-κB activation through selective blockade of the IKK complex IκB kinase β (IKK2) using the compound IMD0354, focusing on the effects of inflammation and pathological angiogenesis in the cornea...
January 13, 2018: Angiogenesis
https://www.readbyqxmd.com/read/29332130/cerebrospinal-fluid-pressure-revisiting-factors-influencing-optic-nerve-head-biomechanics
#8
Yi Hua, Andrew P Voorhees, Ian A Sigal
Purpose: To model the sensitivity of the optic nerve head (ONH) biomechanical environment to acute variations in IOP, cerebrospinal fluid pressure (CSFP), and central retinal artery blood pressure (BP). Methods: We extended a previously published numerical model of the ONH to include 24 factors representing tissue anatomy and mechanical properties, all three pressures, and constraints on the optic nerve (CON). A total of 8340 models were studied to predict factor influences on 98 responses in a two-step process: a fractional factorial screening analysis to identify the 16 most influential factors, followed by a response surface methodology to predict factor effects in detail...
January 1, 2018: Investigative Ophthalmology & Visual Science
https://www.readbyqxmd.com/read/29332121/pattern-onset-ergs-and-veps-produced-by-patterns-arising-from-light-increment-and-decrement
#9
Dennis M Fritsch, Jane C Sowden, Dorothy A Thompson
Purpose: Our aim was to elaborate how on and off signals contribute to pattern ERGs and pattern visual evoked potentials (VEPs) by using pedestal patterns arising from incremental and decremental onset stimulation. Methods: Pattern onset/offset ERGs and VEPs were produced by black and white checks of 60' side length and 88% spatial contrast appearing in a 16° field for 200 ms from white (110 cd/m2), black (7 cd/m2), and gray (48 cd/m2) backgrounds and disappeared for 1000 ms...
January 1, 2018: Investigative Ophthalmology & Visual Science
https://www.readbyqxmd.com/read/29332120/severe-loss-of-tritan-color-discrimination-in-rpe65-associated-leber-congenital-amaurosis
#10
Neruban Kumaran, Caterina Ripamonti, Angelos Kalitzeos, Gary S Rubin, James W B Bainbridge, Michel Michaelides
Purpose: RPE65-associated Leber congenital amaurosis (RPE65-LCA) is a progressive severe retinal dystrophy with early profound dysfunction of rod photoreceptors followed by progressive cone photoreceptor degeneration. We aim to provide detailed information about how cone dysfunction affects color discrimination. Methods: Seven adults (aged 16-21) with RPE65-LCA underwent monocular color discrimination assessment using the Trivector and Ellipse versions of three computerized tests: Cambridge Colour Test (CCT), low vision version of the Cambridge Colour Test (lvvCCT), and the Universal Colour Discrimination Test (UCDT)...
January 1, 2018: Investigative Ophthalmology & Visual Science
https://www.readbyqxmd.com/read/29332050/supplemental-retinal-carotenoids-enhance-memory-in-healthy-individuals-with-low-levels-of-macular-pigment-in-a-randomized-double-blind-placebo-controlled-clinical-trial
#11
Rebecca Power, Robert F Coen, Stephen Beatty, Riona Mulcahy, Rachel Moran, Jim Stack, Alan N Howard, John M Nolan
BACKGROUND: There is a biologically plausible rationale whereby the dietary carotenoids lutein (L), zeaxanthin (Z), and meso-zeaxanthin (MZ), which are collectively referred to as macular pigment (MP) in the central retina (macula), support the maintenance of cognition via their antioxidant and anti-inflammatory properties. OBJECTIVE: To investigate the impact of supplemental L, Z, and MZ on memory, executive function, and verbal fluency among healthy individuals with low MP levels...
2018: Journal of Alzheimer's Disease: JAD
https://www.readbyqxmd.com/read/29332034/microhemodynamic-indices-to-evaluate-the-effectiveness-of-herbal-medicine-in-diabetes-a-comparison-between-alpha-mangostin-and-curcumin-in-the-retina-of-type-2-diabetic-rats
#12
Amporn Jariyapongskul, Chonticha Areebambud, Niimi Hideyuki
OBJECTIVE: This study was aimed to develop microhemodynamic indices to evaluate the effectiveness of herbal medicine in diabetic tissues. METHODS: Male Sprague-Dawley rats were divided into four groups: normal control rats (Control), type 2 diabetic rats without (DM2) and with supplementation of alpha mangostin (DM2-MG) or curcumin (DM2-CUR). Alpha-mangostin or curcumin (200 mg/kg BW) were fed followed by i.p. injection of streptozotocin (STZ). Mean arterial pressure (MAP) and retinal blood flow (RBF) were measured and retinal flow resistance (RFR) was calculated...
January 10, 2018: Clinical Hemorheology and Microcirculation
https://www.readbyqxmd.com/read/29331294/-study-of-the-results-scleral-fixated-intraocular-lenses-in-the-absence-of-capsular-support
#13
A Benarous, A Drimbea, S Milazzo
INTRODUCTION: In the absence of sufficient capsular support, scleral fixation of the intraocular lens is an interesting alternative. The goal is to evaluate this implantation technique when traditional implantation is impossible. PATIENTS AND METHODS: This is an observational, retrospective, monocentric study at the Amiens university medical center between August 2013 and March 2016. Patients all underwent scleral fixation of a three-piece implant without suturing of the haptics, after posterior vitrectomy...
January 10, 2018: Journal Français D'ophtalmologie
https://www.readbyqxmd.com/read/29330660/theobromine-consumption-does-not-improve-fasting-and-postprandial-vascular-function-in-overweight-and-obese-subjects
#14
Lotte Smolders, Ronald P Mensink, Jose J van den Driessche, Peter J Joris, Jogchum Plat
BACKGOUND: Theobromine, a component of cocoa, may favorably affect conventional lipid-related cardiovascular risk markers, but effects on flow-mediated dilation (FMD) and other vascular function markers are not known. OBJECTIVE: To evaluate the effects of 4-week theobromine consumption (500 mg/day) on fasting and postprandial vascular function markers. DESIGN: In a randomized, double-blind crossover study, 44 apparently healthy overweight (N = 30) and obese (N = 14) men and women with low HDL-C concentrations, consumed daily 500 mg theobromine or placebo for 4 weeks...
January 12, 2018: European Journal of Nutrition
https://www.readbyqxmd.com/read/29330497/visual-learning-with-reduced-adaptation-is-eccentricity-specific
#15
Hila Harris, Dov Sagi
Visual learning is known to be specific to the trained target location, showing little transfer to untrained locations. Recently, learning was shown to transfer across equal-eccentricity retinal-locations when sensory adaptation due to repetitive stimulation was minimized. It was suggested that learning transfers to previously untrained locations when the learned representation is location invariant, with sensory adaptation introducing location-dependent representations, thus preventing transfer. Spatial invariance may also fail when the trained and tested locations are at different distance from the center of gaze (different retinal eccentricities), due to differences in the corresponding low-level cortical representations (e...
January 12, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29330064/antiplatelet-and-anticoagulant-drugs-do-not-affect-visual-outcome-in-neovascular-age-related-macular-degeneration-in-the-bramd-trial
#16
Gabriëlle H S Buitendijk, Ann-Sofie M E Schauwvlieghe, Johannes R Vingerling, Reinier O Schlingemann, Caroline C W Klaver
PURPOSE: To determine if use of antiplatelet or anticoagulant (AP/AC) medication influences visual acuity in patients with active neovascular age-related macular degeneration (N-AMD). DESIGN: Retrospective analysis of data from a randomized controlled trial METHODS: Setting: Multi-center STUDY POPULATION: 330 patients with active N-AMD from the BRAMD study, a comparative trial between bevacizumab and ranibizumab in the Netherlands. OBSERVATION PROCEDURES: Patients underwent an extensive ophthalmic examination...
January 9, 2018: American Journal of Ophthalmology
https://www.readbyqxmd.com/read/29330062/fundus-densitometry-findings-suggest-optic-disc-hemorrhages-in-primary-open-angle-glaucoma-have-an-arterial-origin
#17
Jonathan C Chou, Clara C Cousins, John B Miller, Brian J Song, Lucy Q Shen, Michael A Kass, Janey L Wiggs, Louis R Pasquale
PURPOSE: To analyze optic disc hemorrhages (DH) associated with primary open-angle glaucoma by quantifying their geometric profile and comparing their densitometry with hemorrhages from retinal vein occlusions (RVO) and retinal macroaneurysms (MA), which have venous and arterial sources of bleeding, respectively. DESIGN: Retrospective cross-sectional study METHODS: Setting: Massachusetts Eye & Ear POPULATION: Fundus images of DH (n=40), MA (n=14), and RVO (n=25) were identified...
January 9, 2018: American Journal of Ophthalmology
https://www.readbyqxmd.com/read/29329973/altered-gene-expression-in-tree-shrew-retina-and-retinal-pigment-epithelium-produced-by-short-periods-of-minus-lens-wear
#18
Li He, Michael R Frost, John T Siegwart, Thomas T Norton
Hyperopic refractive error is detected by retinal neurons, which generate GO signals through a direct emmetropization signaling cascade: retinal pigment epithelium (RPE) into choroid and then into sclera, thereby increasing axial elongation. To examine signaling early in this cascade, we measured gene expression in the retina and RPE after short exposure to hyperopia produced by minus-lens wear. Gene expression in each tissue was compared with gene expression in combined retina + RPE. Starting 24 days after normal eye opening, three groups of juvenile tree shrews (n = 7 each) wore a monocular -5 D lens...
January 9, 2018: Experimental Eye Research
https://www.readbyqxmd.com/read/29329580/evidence-for-the-activation-of-pyroptotic-and-apoptotic-pathways-in-rpe-cells-associated-with-nlrp3-inflammasome-in-the-rodent-eye
#19
Jiangyuan Gao, Jing Z Cui, Eleanor To, Sijia Cao, Joanne A Matsubara
BACKGROUND: Age-related macular degeneration (AMD) is a devastating eye disease causing irreversible vision loss in the elderly. Retinal pigment epithelium (RPE), the primary cell type that is afflicted in AMD, undergoes programmed cell death in the late stages of the disease. However, the exact mechanisms for RPE degeneration in AMD are still unresolved. The prevailing theories consider that each cell death pathway works independently and without regulation of each other. Building upon our previous work in which we induced a short burst of inflammasome activity in vivo, we now investigate the effects of prolonged inflammasome activity on RPE cell death mechanisms in rats...
January 12, 2018: Journal of Neuroinflammation
https://www.readbyqxmd.com/read/29329516/bilateral-giant-retinal-tears-in-osteogenesis-imperfecta
#20
Paolo Scollo, Martin Paul Snead, Allan James Richards, Rebecca Pollitt, Catherine DeVile
BACKGROUND: Osteogenesis imperfecta (OI) is a rare primarily autosomal dominant condition in which the connective tissues of bones, ligaments and sclerae do not form properly. Typically, mutations in COL1A1 and COL1A2 genes lead to the defective formation or quantity of type I collagen, the principle matrix in these tissues. Molecular genetic studies have now elucidated multiple genetic subtypes of the disorder but little literature exists on the risk of retinal tears and detachments in OI...
January 12, 2018: BMC Medical Genetics
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