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age-related macular degeneration

Maria V Cicinelli, Adriano Carnevali, Alessandro Rabiolo, Lea Querques, Ilaria Zucchiatti, Vincenzo Scorcia, Francesco Bandello, Giuseppe Querques
PURPOSE: To describe macular-foveal capillaries (MFC) by means of optical coherence tomography angiography and to identify the clinical spectrum of this angiographic feature. METHODS: Patients with MFC presenting at the Medical Retina & Imaging Unit of the Department of Ophthalmology, University Vita-Salute San Raffaele in Milan were recruited. Patients underwent a complete ophthalmologic examination that included slit-lamp examination, fundus examination, measurement of best-corrected visual acuity, fundus autofluorescence, and spectral-domain optical coherence tomography (Spectralis HRA + OCT; Heidelberg Engineering, Heidelberg, Germany)...
July 12, 2016: Retina
Roham Soheilian, Mohammad Hossein Jabbarpour Bonyadi, Hamidreza Moein, Mojgan Babanejad, Alireza Ramezani, Mehdi Yaseri, Masoud Soheilian
PURPOSE: To determine the association of C-reactive protein (CRP) and complement factor H (CFH) gene with exudative age-related macular degeneration (AMD) and any possible interaction among these factors. METHODS: In this case-control study, 139 unrelated patients with exudative AMD and 123 non-AMD controls were recruited. Blood sample was taken for analysis of the CRP levels and DNA testing. DNA fragments of CFH gene variants containing 4 single nucleotide polymorphisms including rs800292, rs1061170, rs2274700, and rs3753395 were assessed...
October 24, 2016: International Ophthalmology
Bose Karthikeyan, Lakshminarasimhan Harini, Vaithilingam Krishnakumar, Velu Rajesh Kannan, Krishnan Sundar, Thandavarayan Kathiresan
Endoplasmic reticulum (ER) stress-mediated apoptosis is a well-known factor in the pathogenesis of age-related macular degeneration (AMD). ER stress leads to accumulation of misfolded proteins, which in turn activates unfolded protein response (UPR) of the cell for its survival. The prolonged UPR of ER stress promotes cell death; however, the transition between adaptation and ER stress-induced apoptosis has not been clearly understood. Hence, the present study investigates the regulatory effect of (-)-epigallocatechin gallate (EGCG) on ER stress-induced by hydrogen peroxide (H2O2) and disturbance of calcium homeostasis by thapsigargin (TG) in mouse retinal pigment epithelial (MRPE) cells...
October 24, 2016: Apoptosis: An International Journal on Programmed Cell Death
Koji M Nishiguchi, Yu Yokoyama, Yusuke Fujii, Kosuke Fujita, Yusuke Tomiyama, Ryo Kawasaki, Toshinori Furukawa, Fumiko Ono, Nobuhiro Shimozawa, Mutsumi Togo, Michihiro Suzuki, Toru Nakazawa
Age-dependent formation of macular drusen caused by the focal accumulation of extracellular deposits beneath the retinal pigment epithelium precede the development of age-related macular degeneration (AMD), one of the leading causes of blindness worldwide. It is established that inflammation contributes to the pathogenesis of drusen and AMD. However, development of a preemptive therapeutic strategy targeting macular drusen and AMD has been impeded by the lack of relevant animal models because most laboratory animals lack macula, an anatomic feature present only in humans and a subset of monkeys...
2016: PloS One
Jürgen Maibaum, Sha-Mei Liao, Anna Vulpetti, Nils Ostermann, Stefan Randl, Simon Rüdisser, Edwige Lorthiois, Paul Erbel, Bernd Kinzel, Fabrice A Kolb, Samuel Barbieri, Julia Wagner, Corinne Durand, Kamal Fettis, Solene Dussauge, Nicola Hughes, Omar Delgado, Ulrich Hommel, Ty Gould, Aengus Mac Sweeney, Bernd Gerhartz, Frederic Cumin, Stefanie Flohr, Anna Schubart, Bruce Jaffee, Richard Harrison, Antonio Maria Risitano, Jörg Eder, Karen Anderson
Complement is a key component of the innate immune system, recognizing pathogens and promoting their elimination. Complement component 3 (C3) is the central component of the system. Activation of C3 can be initiated by three distinct routes-the classical, the lectin and the alternative pathways-with the alternative pathway also acting as an amplification loop for the other two pathways. The protease factor D (FD) is essential for this amplification process, which, when dysregulated, predisposes individuals to diverse disorders including age-related macular degeneration and paroxysmal nocturnal hemoglobinuria (PNH)...
October 24, 2016: Nature Chemical Biology
Rebecca J Sardell, Muneeswar G Nittala, Larry D Adams, Reneé A Laux, Jessica N Cooke Bailey, Denise Fuzzell, Sarada Fuzzell, Lori Reinhart-Mercer, Laura J Caywood, Violet Horst, Tine Mackay, Debbie Dana, SriniVas R Sadda, William K Scott, Dwight Stambolian, Jonathan L Haines, Margaret A Pericak-Vance
PURPOSE: To evaluate the heritability of choroidal thickness and its relationship to age-related macular degeneration (AMD). DESIGN: Cohort study. PARTICIPANTS: Six hundred eighty-nine individuals from Amish families with early or intermediate AMD. METHODS: Ocular coherence tomography was used to quantify choroidal thickness, and fundus photography was used to classify eyes into categories using a modified Clinical Age-Related Maculopathy Staging (CARMS) system...
October 19, 2016: Ophthalmology
Marko Popovic, Varun Chaudhary, Bryon R McKay, Prima Moinul, Mohammad Mohaghagh, Anne Beattie, Mark Fava, Dalia Eino, Keith Mann, Lawrence Kobetz, Joshua Barbosa
OBJECTIVE: The purpose of this study was to investigate the extent of agreement between physicians and patients in reporting ocular history and to determine whether there are any predictive factors for physician-patient consensus. DESIGN: Retrospective chart review. PARTICIPANTS: Between June and September 2014, adult patients undergoing cataract surgery were recruited for the study. METHODS: Before surgery, patient demographics and self-reported ocular history were extracted from a prospectively collected database...
October 2016: Canadian Journal of Ophthalmology. Journal Canadien D'ophtalmologie
Gabriëlle H S Buitendijk, Ada J Hooghart, Corina Brussee, Paulus T V M de Jong, Albert Hofman, Johannes R Vingerling, Caroline C W Klaver
Purpose: Reticular pseudodrusen (RPD) are considered to be a distinct feature in AMD. Population studies have studied the epidemiology of RPD using standard color fundus photographs (CFP). However, recent studies have shown that RPD are better imaged using near-infrared (NIR) imaging. We studied the epidemiology of RPD in a large population-based study using NIR and CFP. Methods: Participants aged 65+ years from the Rotterdam Study underwent ophthalmologic examination including NIR and CFP...
October 1, 2016: Investigative Ophthalmology & Visual Science
Haibo Wang, Xiaokun Han, Eric Kunz, M Elizabeth Hartnett
Purpose: This study addresses the hypothesis that age-related stresses upregulate Thy-1 in choroidal endothelial cells (CECs) and contribute to CEC activation and migration, processes important in choroidal neovascularization (CNV). Methods: Measurements were made of Thy-1 protein (Western blot) in CECs and Thy-1 mRNA (real time quantitative PCR) in CECs treated with VEGF, CCL11, or PBS or in RPE/choroids from young or old donors or lasered or nonlasered mice. Immunolabeled Thy-1 in ocular sections was compared from young versus old human donor eyes or those with or without neovascular AMD or from lasered versus nonlasered mice...
October 1, 2016: Investigative Ophthalmology & Visual Science
Anita Barikian, Haytham Salti, Ammar Safar, Ziyad R Mahfoud, Ziad F Bashshur
PURPOSE: To study the benefit of intravitreal dexamethasone implant in the management of neovascular age-related macular degeneration resistant to bevacizumab and ranibizumab. METHODS: Patients with persistent macular fluid on optical coherence tomography despite monthly treatment with at least three consecutive bevacizumab injections followed by at least three ranibizumab injections were prospectively enrolled. A single dexamethasone implant was administered followed by intravitreal ranibizumab 1 week later...
October 20, 2016: Retina
J Q Gil, J P Marques, R Hogg, C Rosina, M L Cachulo, A Santos, G Staurenghi, U Chakravarthy, R Silva
PurposeTo determine whether reticular pseudodrusen (RPD) confer a long-term increased risk of progression to late age-related macular degeneration (AMD) in the fellow eye of patients with unilateral wet-AMD.Patients and methodsThis was a multicenter, combined prospective and retrospective, longitudinal, observational, study. Patients with wet-AMD in one eye were recruited from two centers and evaluated on the risk of progression to late-AMD in the second eye (study eye). A minimum follow-up of 5 years was required, unless progression occurred first...
October 21, 2016: Eye
Melinda Vass, Ágnes Diószegi, Norbert Németh, Viktória Sógor, Sándor Baráth, Eszter Szalai, László Módis, Soltész Pál
Rheopheresis is an extracorporal selective double-filtration procedure. In the first part of the treatment the blood is passes through the plasma filter, which separates blood cells from the plasma. Then the plasma flow to a second filter called MONET (Membranefiltration Optimised Novel Extracorporal Treatment). The MONET filter retains high molecular weight proteins such LDL, Lp(a), fibrinogen, α2 macroglobulin, vWF and IgM. Hereby the whole blood and plasma viscosity decrease, improves microcirculation, and has a positive effect on lipid profile as well...
October 15, 2016: Clinical Hemorheology and Microcirculation
Yafeng Wang, Mingxu Wang, Xiaoqing Zhang, Jing Nie, Ming Zhang, Xiaohong Liu, Le Ma
The purpose of this study was to evaluate the association of the hepatic lipase (LIPC) rs493258 polymorphism and susceptibility to age-related macular degeneration (AMD). A systematic search in PubMed, EMBASE, and ISI web of science databases was performed to identify eligible published studies without language restrictions up to April 2016. Pooled odds ratios (ORs) with 95% confidence intervals (CIs) in different stages of AMD were estimated under different genetic models using meta-analytic methods. Seven studies comprising 20,559 cases and 17,200 controls met the inclusion criteria and were included in the meta-analysis...
October 18, 2016: International Journal of Environmental Research and Public Health
Chandrakumar Balaratnasingam, Lawrence A Yannuzzi, Christine A Curcio, William H Morgan, Giuseppe Querques, Vittorio Capuano, Eric Souied, Jesse Jung, K Bailey Freund
Purpose: Drusenoid pigment epithelial detachments (PEDs) are a defined path to atrophy in age-related macular degeneration (AMD). We analyzed the relationships between retinal pigment epithelium (RPE) and drusen volume changes during the PED lifecycle, using spectral-domain optical coherence tomography (SD-OCT). Methods: Twenty-one cases of drusenoid PED tracked using SD-OCT through periods of growth and collapse were evaluated. Volumetric calculations and piece-wise linear regression analysis were used to determine the breakpoint between growth and collapse...
October 1, 2016: Investigative Ophthalmology & Visual Science
Elizabeth A Atchison, Ahmed F Omar, Raymond Iezzi, Andrew J Barkmeier, Sophie J Bakri
PURPOSE: To examine the safety outcomes of an intravitreal injection-only clinic where patients needing long-term anti-vascular endothelial growth factor therapy are treated with injections at a predetermined interval for a set number of injections without an accompanying clinic visit. METHODS: This is a retrospective chart review of all patients with exudative macular degeneration treated in an intravitreal injection clinic over a 4-year period. Data on the outcome measures of interest were gathered from electronic medical records...
October 18, 2016: Retina
Eung Suk Kim, Yonguk Kim, Seung-Young Yu, Moosang Kim
No abstract text is available yet for this article.
2016: Patient Preference and Adherence
Rogan G Fraser, Rose Tan, Lauren N Ayton, Emily Caruso, Robyn H Guymer, Chi D Luu
Purpose: We determine the feasibility of using a dark-adapted chromatic (DAC) perimeter to obtain dark-adapted static and dynamic rod function at multiple retinal locations, and compare these functional parameters between subjects with intermediate age-related macular degeneration (AMD) and normal controls. Methods: Perimetric dark-adapted retinal sensitivities for the 505 and 620 nm stimuli across 7 retinal locations within the central 12° were repeatedly measured after exposing to a single photobleach in 22 intermediate AMD subjects and 8 controls...
October 1, 2016: Investigative Ophthalmology & Visual Science
Junhui Shen, Jianfeng He, Fang Wang
In the past decades, much investigation has been done on the role of lipids in the development and progression of age-related macular degeneration (AMD). The lipids involved in those research studies had included PUFAs, phospholipids, sphingolipids, cholesterol, lipid protein, etc. There are a large number of clinical research studies on the association of PUFAs with the development and progression of AMD. The relationship between cholesterol level and AMD has been explored for decades and much data and analysis results have been obtained...
September 2016: Discovery Medicine
Mohammed Ali Khan, Abtin Shahlaee, Alok S Bansal, Joseph I Maguire
PURPOSE: To describe a surgical technique for fluorescein-assisted subretinal tissue plasminogen activator delivery during pars plana vitrectomy for submacular hemorrhage. METHODS: Retrospective, interventional, consecutive case series. RESULTS: Six eyes of 6 patients were reviewed. Etiology of submacular hemorrhage was age-related macular degeneration in 2 eyes and polypoidal choroidal vasculopathy in 4 eyes. Twenty-three-gauge pars plana vitrectomy was performed and fluorescein-stained tissue plasminogen activator was injected in the subretinal space through a 41-gauge cannula in all eyes...
October 11, 2016: Retina
Konstantinos Balaskas, Michael Karampelas, Mania Horani, Oana Hotu, Pearse Keane, Tariq Aslam
PURPOSE: To assess whether best-corrected visual acuity and pigment epithelial detachment (PED) height, volume, and reflectivity in patients with wet age-related macular degeneration are influenced by baseline anatomical and functional parameters, including quantifiable metrics of PED morphology and choice of treatment. METHODS: One hundred two consecutive, treatment-naive wet age-related macular degeneration patients with PED (>50 μm) treated with aflibercept (52) or ranibizumab (50) were retrospectively included...
October 11, 2016: Retina
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