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age-related macular degeneration

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https://www.readbyqxmd.com/read/29666476/hif1a-inactivation-rescues-photoreceptor-degeneration-induced-by-a-chronic-hypoxia-like-stress
#1
Maya Barben, Divya Ail, Federica Storti, Katrin Klee, Christian Schori, Marijana Samardzija, Stylianos Michalakis, Martin Biel, Isabelle Meneau, Frank Blaser, Daniel Barthelmes, Christian Grimm
Reduced choroidal blood flow and tissue changes in the ageing human eye impair oxygen delivery to photoreceptors and the retinal pigment epithelium. As a consequence, mild but chronic hypoxia may develop and disturb cell metabolism, function and ultimately survival, potentially contributing to retinal pathologies such as age-related macular degeneration (AMD). Here, we show that several hypoxia-inducible genes were expressed at higher levels in the aged human retina suggesting increased activity of hypoxia-inducible transcription factors (HIFs) during the physiological ageing process...
April 17, 2018: Cell Death and Differentiation
https://www.readbyqxmd.com/read/29666126/domains-of-health-related-quality-of-life-in-age-related-macular-degeneration-a-qualitative-study-in-the-chinese-cultural-context
#2
Wei Bian, Junli Wan, Graeme Smith, Shiying Li, Mingqiong Tan, Fengjiao Zhou
OBJECTIVE: To explore which areas of health-related quality of life were affected in Chinese patients, and to identify whether the areas are well covered by validated questionnaires. DESIGN: A qualitative study based on semistructured interviews was conducted. A qualitative thematic analysis following the approach of Colaizzi was used to analyse the interview data for significant statements and phrases. The themes and subthemes organised from the analysis were then compared by using the following current instruments: National Eye Institute Visual Function Questionnaire (NEI-VFQ-25), Macular Disease Quality of life Questionnaire (MacDQoL) and Low-Luminance Questionnaire (LLD)...
April 17, 2018: BMJ Open
https://www.readbyqxmd.com/read/29664944/ccl2-single-nucleotide-polymorphism-of-rs1024611-implicates-prominence-of-inflammatory-cascade-by-univariate-modeling-in-indian-amd
#3
Neel Kamal Sharma, Kaushal Sharma, Ramandeep Singh, Suresh Kumar Sharma, Akshay Anand
BACKGROUND: The role of chemotactic protein CCL2/MCP-1 has been widely explored in age related macular degeneration (AMD) patients as well as animal models through our previous studies. AIM: Aim of the study was to examine the association of another variance of CCL2, rs1024611 in pathophysiology of AMD. METHODS: This particular SNP has been found to be involved in inflammatory processes in various diseases. Total 171 subjects were recruited in the study with all demographic details by administering a standard questionnaire...
2018: PloS One
https://www.readbyqxmd.com/read/29664159/reading-aids-for-adults-with-low-vision
#4
REVIEW
Gianni Virgili, Ruthy Acosta, Sharon A Bentley, Giovanni Giacomelli, Claire Allcock, Jennifer R Evans
BACKGROUND: The purpose of low-vision rehabilitation is to allow people to resume or to continue to perform daily living tasks, with reading being one of the most important. This is achieved by providing appropriate optical devices and special training in the use of residual-vision and low-vision aids, which range from simple optical magnifiers to high-magnification video magnifiers. OBJECTIVES: To assess the effects of different visual reading aids for adults with low vision...
April 17, 2018: Cochrane Database of Systematic Reviews
https://www.readbyqxmd.com/read/29662155/iray-therapy-as-an-adjuvant-therapy-in-newly-diagnosed-patients-with-neovascular-age-related-macular-degeneration
#5
Christopher Brand, Mark Arnoldussen
OBJECTIVES: To determine the safety and efficacy at 12 months of follow-up after stereotactic radiotherapy in combination therapy with intravitreal ranibizumab injections in treatment naïve patients with neovascular age-related macular degeneration. METHODS: Retrospective data analysis in patients who received stereotactic radiotherapy (IRay Therapy) during the induction phase of intravitreal ranibizumab injections and a monotherapy control group. RESULTS: The baseline VA in the IRay and control group was 59...
April 17, 2018: Eye
https://www.readbyqxmd.com/read/29661534/a-new-chlorin-formulation-promotes-efficient-photodynamic-action-in-choriocapillaris-of-rabbit-s-eyes
#6
Gustavo H A Salomao, Adjaci U Fernandes, Mauricio S Baptista, João Paulo Tardivo, Stella Gianssante, Juliana Mora Veridiano, Olga Maria S Toledo, Giuliana Petri, Denise Maria Christofolini, João Antonio Correa
Age-related macular degeneration (AMD) as well as other choroidal diseases, demand novel therapeutic methods. Photodynamic therapy (PDT), which uses light and photosensitizer (PS) to cause specific vascular occlusion in the macula, is an interesting alternative. The only drug approved for the PDT treatment of AMD (Verteporfin) has a natural tendency to aggregate, demanding an expensive separation procedure during purification. We report a novel and affordable PS that is intrinsically protected against aggregation, the Monomeric Chlorin at High Concentration (MCHC-Chlorin), whose liposomal formulation was developed to provoke effective photodynamic action on the choroidal vasculature...
April 4, 2018: Bioorganic & Medicinal Chemistry Letters
https://www.readbyqxmd.com/read/29660843/mortality-after-a-cerebrovascular-event-in-age-related-macular-degeneration-patients-treated-with-bevacizumab-ocular-injections
#7
Joel Hanhart, Doron S Comaneshter, Shlomo Vinker
PURPOSE: To analyse the mortality associated with intravitreal injections of bevacizumab for age-related macular degeneration (AMD) in patients previously diagnosed with stroke or transient ischaemic attack (TIA). METHODS: We reviewed bevacizumab-treated AMD patients with a diagnosis of stroke or TIA prior to their first bevacizumab injection (n = 948). Those patients, naïve to any anti-vascular endothelial growth factor (anti-VEGF) at the time of stroke/TIA, were then compared to age- and gender-matched patients who had a stroke/TIA at the same time and had never been exposed to anti-VEGF...
April 16, 2018: Acta Ophthalmologica
https://www.readbyqxmd.com/read/29659183/predictors-of-visual-outcomes-in-patients-with-neovascular-age-related-macular-degeneration-treated-with-anti-vascular-endothelial-growth-factor-therapy-post-hoc-analysis-of-the-view-studies
#8
Paolo Lanzetta, Alan F Cruess, Salomon Y Cohen, Jason S Slakter, Todd Katz, Olaf Sowade, Oliver Zeitz, Christiane Ahlers, Paul Mitchell
PURPOSE: Identify predictors for response to anti-vascular endothelial growth factor (VEGF) therapy in patients with neovascular (wet) age-related macular degeneration (nAMD). METHODS: Retrospective, post hoc analysis of VIEW 1/2. Patients were randomized 1:1:1:1 to 0.5 mg intravitreal aflibercept (IVT-AFL) injection every 4 weeks (0.5q4); 2 mg IVT-AFL every 4 weeks (2q4); 2 mg IVT-AFL every 8 weeks (2q8) after an initial three injections at weeks 0, 4 and 8 or 0...
April 16, 2018: Acta Ophthalmologica
https://www.readbyqxmd.com/read/29655643/automated-segmentation-of-lesions-including-subretinal-hyperreflective-material-in-neovascular-age-related-macular-degeneration
#9
Hyungwoo Lee, Kyung Eun Kang, Hyewon Chung, Hyung Chan Kim
PURPOSE: To evaluate an automated segmentation algorithm with a convolutional neural network (CNN) to quantify and detect intraretinal fluid (IRF), subretinal fluid (SRF), pigment epithelial detachment (PED), and subretinal hyperreflective material (SHRM) through analyses of spectral domain optical coherence tomography (SD-OCT) images from patients with neovascular age-related macular degeneration (nAMD). DESIGN: Reliability and validity analysis of a diagnostic tool...
April 12, 2018: American Journal of Ophthalmology
https://www.readbyqxmd.com/read/29655642/estimating-medicare-and-patient-savings-from-the-use-of-bevacizumab-for-the-treatment-of-exudative-age-related-macular-degeneration
#10
Philip J Rosenfeld, Matthew A Windsor, William J Feuer, Sissi J J Sun, Kevin D Frick, Eric A Swanson, David Huang
PURPOSE: The Medicare cost savings from the use of bevacizumab in the United States for the treatment of exudative age-related macular degeneration (AMD) were estimated by replacing the use of bevacizumab with ranibizumab and aflibercept. DESIGN: Retrospective trend study. METHODS: Main outcome measures were spending by Medicare as tracked by Current Procedural Terminology (CPT) codes for intravitreal injections (67028) and treatment-specific J-codes (J0178, J2778, J9035, J3490 and J3590) for inhibitors of vascular endothelial growth factor...
April 12, 2018: American Journal of Ophthalmology
https://www.readbyqxmd.com/read/29652691/visual-acuity-in-pseudoxanthoma-elasticum
#11
Sara Risseeuw, Jeannette Ossewaarde-van Norel, Caroline C W Klaver, Johanna M Colijn, Saskia M Imhof, Redmer van Leeuwen
PURPOSE: To assess the age-specific proportion of visual impairment in patients with pseudoxanthoma elasticum (PXE) and to compare this with foveal abnormality and similar data of late age-related macular degeneration patients. METHODS: Cross-sectional data of 195 patients with PXE were reviewed, including best-corrected visual acuity and imaging. The World Health Organisation criteria were used to categorize bilateral visual impairment. These results were compared with similar data of 131 patients with late age-related macular degeneration from the Rotterdam study...
April 12, 2018: Retina
https://www.readbyqxmd.com/read/29651346/choriocapillaris-loss-in-advanced-age-related-macular-degeneration
#12
REVIEW
Carlos A Moreira-Neto, Eric M Moult, James G Fujimoto, Nadia K Waheed, Daniela Ferrara
The purpose of this review is to summarize the current knowledge on choriocapillaris loss in advanced age macular degeneration (AMD). Several histopathological studies in animal models and human eyes had showed that the choriocapillaris density decreases with age. However, the role of choriocapillaris loss is still unclear in AMD and its advanced forms, either choroidal neovascularization (CNV) or geographic atrophy (GA). Some authors have hypothesized that choriocapillaris loss might precede overt retinal pigment epithelium atrophy...
2018: Journal of Ophthalmology
https://www.readbyqxmd.com/read/29650998/a-mega-analysis-of-expression-quantitative-trait-loci-eqtl-provides-insight-into-the-regulatory-architecture-of-gene-expression-variation-in-liver
#13
Tobias Strunz, Felix Grassmann, Javier Gayán, Satu Nahkuri, Debora Souza-Costa, Cyrille Maugeais, Sascha Fauser, Everson Nogoceke, Bernhard H F Weber
Genome-wide association studies (GWAS) have identified numerous genetic variants in the human genome associated with diseases and traits. Nevertheless, for most loci the causative variant is still unknown. Expression quantitative trait loci (eQTL) in disease relevant tissues is an excellent approach to correlate genetic association with gene expression. While liver is the primary site of gene transcription for two pathways relevant to age-related macular degeneration (AMD), namely the complement system and cholesterol metabolism, we explored the contribution of AMD associated variants to modulate liver gene expression...
April 12, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29642425/lutein-and-zeaxanthin-are-positively-associated-with-visual-spatial-functioning-in-older-adults-an-fmri-study
#14
Catherine M Mewborn, Cutter A Lindbergh, Talia L Robinson, Marissa A Gogniat, Douglas P Terry, Kharine R Jean, Billy Randy Hammond, Lisa M Renzi-Hammond, Lloyd Stephen Miller
Lutein (L) and zeaxanthin (Z) are two xanthophyll carotenoids that have antioxidant and anti-inflammatory properties. Previous work has demonstrated their importance for eye health and preventing diseases such as age-related macular degeneration. An emerging literature base has also demonstrated the importance of L and Z in cognition, neural structure, and neural efficiency. The present study aimed to better understand the mechanisms by which L and Z relate to cognition, in particular, visual-spatial processing and decision-making in older adults...
April 7, 2018: Nutrients
https://www.readbyqxmd.com/read/29629297/influences-of-pinpoint-plantar-long-wavelength-infrared-light-irradiation-stress-free-therapy-on-chorioretinal-hemodynamics-atherosclerosis-factors-and-vascular-endothelial-growth-factor
#15
Keisou Ishimaru, Takuma Nakajima, Yoshihisa Namiki, Kenji Ryotokuji
Background: We previously reported that pinpoint plantar long-wavelength infrared light irradiation (stress-free therapy; SFT) is useful for alleviating insulin resistance and improving intracranial blood flow in patients with type 2 diabetes mellitus. This study was undertaken to evaluate the influences of SFT on chorioretinal hemodynamics (retinal artery and vein blood flows) as well as atherosclerosis-related factors (TG, LDL-C) and VEGF in patients with dyslipidemia. Methods: Four patients with dyslipidemia received 15-minute irradiation with a stress-free apparatus (far-infrared wavelength, 30 mW)...
March 2018: Integrative Medicine Research
https://www.readbyqxmd.com/read/29628756/combination-of-ranibizumab-and-indomethacin-for-neovascular-age-related-macular-degeneration-randomized-controlled-trial
#16
Andrea Russo, Nicolò Scaroni, Elena Gambicorti, Raffaele Turano, Francesco Morescalchi, Ciro Costagliola, Francesco Semeraro
Purpose: The aim of this study was to evaluate whether indomethacin eye drops and intravitreal ranibizumab (IVR) injections would provide additional benefit over ranibizumab alone in the treatment of choroidal neovascularization (CNV). Participants and methods: This was a randomized, prospective pilot study of eyes with new-onset CNV. Fifty-eight patients were randomized 1:1 into a ranibizumab monotherapy (RM) group and a ranibizumab plus indomethacin (RI) group...
2018: Clinical Ophthalmology
https://www.readbyqxmd.com/read/29628329/structure-guided-evolution-of-a-2-phenyl-4-carboxyquinoline-chemotype-into-ppar%C3%AE-selective-agonists-new-leads-for-oculovascular-conditions
#17
Xiao-Zheng Dou, Dinesh Nath, Younghwa Shin, Jian-Xing Ma, Adam S Duerfeldt
Small molecule agonism of PPARα represents a promising new avenue for the development of non-invasive treatments for oculovascular diseases like diabetic retinopathy and age-related macular degeneration. Herein we report initial structure-activity relationships for the newly identified quinoline-based PPARα agonist, Y-0452. Preliminary computational studies led to the hypothesis that carboxylic acid transposition and deconstruction of the Y-0452 quinoline system would enhance ligand-protein interactions and better complement the nature of the binding pocket...
April 5, 2018: Bioorganic & Medicinal Chemistry Letters
https://www.readbyqxmd.com/read/29627466/a-polysaccharide-from-green-tea-camellia-sinensis-l-protects-human-retinal-endothelial-cells-against-hydrogen-peroxide-induced-oxidative-injury-and-apoptosis
#18
Yitao Yan, Yanfan Ren, Xinmin Li, Xinxia Zhang, Huiqing Guo, Yutong Han, Junxi Hu
Oxidative damage of retinal pigment epithelium (RPE) cells is involved in the pathogenesis age related macular degeneration (AMD). The purpose of this study was to evaluate the potential protective effect of a purified green tea polysaccharide (GTWP) against hydrogen peroxide (H2 O2 ) induced oxidative stress and apoptosis in human retinal pigment epithelial cells (ARPE-19 cells). Human ARPE-19 cells were treated with 1 h of 500 μM H2 O2 before incubation with GTWP for 24 h. Pretreatment of GTWP decreased H2 O2 -induced cell death and cell apoptosis, and efficiently suppressed the intracellular ROS production and malondialdehyde (MDA) generation induced by H2 O2 treatment...
April 5, 2018: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/29625486/structure-function-analysis-in-patients-with-intermediate-age-related-macular-degeneration
#19
Marlene Saßmannshausen, Julia S Steinberg, Rolf Fimmers, Maximilian Pfau, Sarah Thiele, Monika Fleckenstein, Frank G Holz, Steffen Schmitz-Valckenberg
Purpose: To examine the topographic correlation between retinal morphology and retinal sensitivity by mesopic and scotopic fundus-controlled perimetry (FCP) in eyes with intermediate AMD. Methods: Thirty-five eyes from 32 patients (mean age 70.9 years) and 29 age-matched controls prospectively underwent spectral-domain optical coherence tomography (SD-OCT) imaging. Mesopic (Goldman III, 200 ms, 4-2 strategy) and scotopic (Goldman V, 200 ms, 4-2 strategy) FCP with a 56-stimulus point grid was performed in AMD patients with the MP-1S...
March 1, 2018: Investigative Ophthalmology & Visual Science
https://www.readbyqxmd.com/read/29624116/evaluation-of-congo-red-staining-in-degenerating-porcine-photoreceptors-in-vitro-protective-effects-by-structural-and-trophic-support
#20
Camilla Mohlin, Dick Delbro, Anders Kvanta, Kjell Johansson
Congo red (CR) is a histological stain used for the detection of extracellular amyloids mediating various neurodegenerative diseases. Given that damaged photoreceptors appear to degenerate similarly to other nerve cells, CR staining was evaluated in experimentally injured porcine retina. CR staining appeared mostly as discrete cytosolic deposits with no obvious plaque formation during the investigated time period. Increases of CR labeling coincided temporally with the known accumulation of mislocalized opsins and increases of cell death...
April 1, 2018: Journal of Histochemistry and Cytochemistry: Official Journal of the Histochemistry Society
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