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age related macular degeneration

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https://www.readbyqxmd.com/read/28922378/relationships-of-orientation-discrimination-threshold-and-visual-acuity-with-macular-lesions-in-age-related-macular-degeneration
#1
Haojie Fu, Bin Zhang, Jianliang Tong, Harold Bedell, Hecheng Zhang, Yating Yang, Chaochao Nie, Yingdong Luo, Xiaoling Liu
PURPOSE: To measure visual acuity and metamorphopsia in patients with age-related macular degeneration (AMD) and to explore their relationship with macular lesions. METHODS: In this cross-sectional study, a total of 32 normal subjects (32 eyes) and 35 AMD patients (35 eyes) were recruited. They were categorized into 4 groups: normal, dry AMD, non-active wet AMD, and active wet AMD. Best-corrected visual acuity (BCVA) was measured using the Early Treatment Diabetic Retinopathy Study protocol...
2017: PloS One
https://www.readbyqxmd.com/read/28920007/towards-treatment-of-stargardt-disease-workshop-organized-and-sponsored-by-the-foundation-fighting-blindness
#2
REVIEW
Avery E Sears, Paul S Bernstein, Artur V Cideciyan, Carel Hoyng, Peter Charbel Issa, Krzysztof Palczewski, Philip J Rosenfeld, SriniVas Sadda, Ulrich Schraermeyer, Janet R Sparrow, Ilyas Washington, Hendrik P N Scholl
Accumulation of fluorescent metabolic byproducts of the visual (retinoid) cycle is associated with photoreceptor and retinal pigment epithelial cell death in both Stargardt disease and atrophic (nonneovascular) age-related macular degeneration (AMD). As a consequence of this observation, small molecular inhibitors of enzymes in the visual cycle were recently tested in clinical trials as a strategy to protect the retina and retinal pigment epithelium in patients with atrophic AMD. To address the clinical translational needs for therapies aimed at both diseases, a workshop organized by the Foundation Fighting Blindness was hosted by the Department of Pharmacology at Case Western Reserve University on February 17, 2017, at the Tinkham Veale University Center, Cleveland, OH, USA...
September 2017: Translational Vision Science & Technology
https://www.readbyqxmd.com/read/28919726/gene-expression-levels-of-the-insulin-like-growth-factor-family-in-patients-with-amd-before-and-after-ranibizumab-intravitreal-injections
#3
Barbara Strzalka-Mrozik, Malgorzata Kimsa-Furdzik, Adam Kabiesz, Katarzyna Michalska-Malecka, Malgorzata Nita, Urszula Mazurek
PURPOSE: The present study focused on the assessment of the mRNA levels of the insulin-like growth factor (IGF) family in patients with the exudative form of age-related macular degeneration (AMD) before and after ranibizumab intravitreal injections. PATIENTS AND METHODS: An analysis of the expression profile of the IGF family of genes in patients with AMD was carried out using the oligonucleotide microarray and quantitative reverse transcriptase polymerase chain reaction (RT-qPCR) methods...
2017: Clinical Interventions in Aging
https://www.readbyqxmd.com/read/28918254/permissive-role-for-mglu1-metabotropic-glutamate-receptors-in-excitotoxic-retinal-degeneration
#4
Francesca Liberatore, Domenico Bucci, Giada Mascio, Michele Madonna, Paola Di Pietro, Martina Beneventano, Alda Maria Puliti, Giuseppe Battaglia, Valeria Bruno, Ferdinando Nicoletti, Maria Rosaria Romano
Neuroprotection is an unmet need in eye disorders characterized by retinal ganglion cell (RGC) death, such as prematurity-induced retinal degeneration, glaucoma, and age- related macular degeneration. In all these disorders excitotoxicity is a prominent component of neuronal damage, but clinical data discourage the development of NMDA receptor antagonists as neuroprotectants. Here, we show that activation of mGlu1 metabotropic glutamate receptors largely contributes to excitotoxic degeneration of RGCs. Mice at postnatal day 9 were challenged with a toxic dose of monosodium glutamate (MSG, 3 g/kg), which caused the death of >70% of Brn-3a(+) RGCs...
September 13, 2017: Neuroscience
https://www.readbyqxmd.com/read/28918250/associations-of-cholesteryl-ester-transfer-protein-cetp-gene-variants-with-predisposition-to-age-related-macular-degeneration
#5
Rasa Liutkeviciene, Alvita Vilkeviciute, Greta Streleckiene, Loresa Kriauciuniene, Romanas Chaleckis, Vytenis Pranas Deltuva
PURPOSE: To determine the frequency of the genotypes of single nucleotide polymorphisms (SNPs) in the gene encoding cholesteryl ester transfer protein (CETP) and their associations with age-related macular degeneration (AMD) in the Lithuanian population. STUDY DESIGN: A total of 1264 subjects were examined: 251 patients with early AMD, 206 patients with exudative AMD, and 807 healthy controls. METHODS: The genotyping of CETP (rs5882, rs708272, rs3764261, rs1800775, rs2303790) was carried out using the RT-PCR...
September 13, 2017: Gene
https://www.readbyqxmd.com/read/28918058/reducible-peg-pod-dna-nanoparticles-for-gene-transfer-in%C3%A2-vitro-and-in%C3%A2-vivo-application-in-a-mouse-model-of-age-related-macular-degeneration
#6
Bhanu Chandar Dasari, Siobhan M Cashman, Rajendra Kumar-Singh
Non-viral gene delivery systems are being developed to address limitations of viral gene delivery. Many of these non-viral systems are modeled on the properties of viruses including cell surface binding, endocytosis, endosomal escape, and nuclear targeting. Most non-viral gene transfer systems exhibit little correlation between in vitro and in vivo efficiency, hampering a systematic approach to their development. Previously, we have described a 3.5 kDa peptide (peptide for ocular delivery [POD]) that targets cell surface sialic acid...
September 15, 2017: Molecular Therapy. Nucleic Acids
https://www.readbyqxmd.com/read/28918027/adeno-associated-viral-vector-mediated-mtor-inhibition-by-short-hairpin-rna-suppresses-laser-induced-choroidal-neovascularization
#7
Tae Kwann Park, Si Hyung Lee, Jun Sub Choi, Seung Kwan Nah, Hee Jong Kim, Ha Yan Park, Heuiran Lee, Steven Hyun Seung Lee, Keerang Park
Choroidal neovascularization (CNV) is the defining characteristic feature of the wet subtype of age-related macular degeneration (AMD) and may result in irreversible blindness. Based on anti-vascular endothelial growth factor (anti-VEGF), the current therapeutic approaches to CNV are fraught with difficulties, and mammalian target of rapamycin (mTOR) has recently been proposed as a possible therapeutic target, although few studies have been conducted. Here, we show that a recombinant adeno-associated virus-delivered mTOR-inhibiting short hairpin RNA (rAAV-mTOR shRNA), which blocks the activity of both mTOR complex 1 and 2, represents a promising therapeutic approach for the treatment of CNV...
September 15, 2017: Molecular Therapy. Nucleic Acids
https://www.readbyqxmd.com/read/28916483/recombinant-humanized-anti-vascular-endothelial-growth-factor-monoclonal-antibody-efficiently-suppresses-laser-induced-choroidal-neovascularization-in-rhesus-monkeys
#8
Wan-Wan Ji, Dong-An Yu, Peng Yang, Peng Fang, Yu-Xia Cao, Hu Li, Ning Xie, Shou-Sheng Yan
Neovascular age-related macular degeneration, characterized by abnormal choroidal neovascularization (CNV), is a major cause of blindness worldwide. Anti-vascular endothelial growth factor (VEGF) antibodies have demonstrated significant efficacy in improving visual acuity. TMAB001 is a new recombinant humanized rabbit anti-VEGF monoclonal antibody. It presents high activities in vitro studies. In the binding affinity assay, TMAB001 exhibited a high binding capability to VEGF with an affinity constant of 10(-11)M...
September 12, 2017: European Journal of Pharmaceutical Sciences
https://www.readbyqxmd.com/read/28916333/human-plasma-metabolomics-study-across-all-stages-of-age-related-macular-degeneration-identifies-potential-lipid%C3%A2-biomarkers
#9
Inês Laíns, Rachel S Kelly, John B Miller, Rufino Silva, Demetrios G Vavvas, Ivana K Kim, Joaquim N Murta, Jessica Lasky-Su, Joan W Miller, Deeba Husain
PURPOSE: To characterize the plasma metabolomic profile of patients with age-related macular degeneration (AMD) using mass spectrometry (MS). DESIGN: Cross-sectional observational study. PARTICIPANTS: We prospectively recruited participants with a diagnosis of AMD and a control group (>50 years of age) without any vitreoretinal disease. METHODS: All participants underwent color fundus photography, used for AMD diagnosis and staging, according to the Age-Related Eye Disease Study classification scheme...
August 31, 2017: Ophthalmology
https://www.readbyqxmd.com/read/28915445/exploring-the-association-of-rs10490924-polymorphism-with-age-related-macular-degeneration-an-in-silico-approach
#10
Farhad Jahanfar, Hamed Hamishehkar
The polymorphism rs10490924 (A69S) in the age-related maculopathy susceptibility 2 (ARMS2) gene is highly associated with age-related macular degeneration, which is the leading cause of blindness among the elderly population. The ARMS2 gene encodes a putative small (11kDa) protein, which the function and localization of the ARMS2 protein remain under debate. For a better understanding of functional impacts of the A69S mutation, we performed a detailed analysis of the ARMS2 sequence with a broad set of bioinformatics tools...
September 6, 2017: Journal of Molecular Graphics & Modelling
https://www.readbyqxmd.com/read/28913999/five-year-outcomes-of-ranibizumab-in-neovascular-age-related-macular-degeneration-real-life-clinical-experience
#11
Abdullah Ozkaya, Zeynep Alkin, Mesut Togac, Sibel Ahmet, Irfan Perente, Muhittin Taskapili
PURPOSE: To evaluate the outcomes of 5-year ranibizumab treatment in neovascular age-related macular degeneration (nAMD) in a single center and real life clinical setting. METHODS: The records of nAMD patients who were treated with ranibizumab between January 2010 and June 2011 were retrospectively reviewed. Patients who completed 5 years of follow-up were included. Main outcome measures were change in best-corrected visual acuity, central retinal thickness, and visit and injection numbers...
September 11, 2017: Korean Journal of Ophthalmology: KJO
https://www.readbyqxmd.com/read/28913998/depressive-symptoms-and-quality-of-life-in-age-related-macular-degeneration-based-on-korea-national-health-and-nutrition-examination-survey-knhanes
#12
So Jung Ryu, Won June Lee, Leslie Bishop Tarver, Yong Un Shin, Min Ho Kang, Mincheol Seong, Hee Yoon Cho
PURPOSE: This study was conducted to investigate the depressive symptoms and quality of life (QOL) in patients with age-related macular degeneration (AMD) using data obtained from the Korea National Health and Nutritional Examination Survey V-2 (KNHANES V-2) conducted in 2011. METHODS: This was a population-based, cross-sectional study that selected 329 participants from the fifth KNHANES (2011) who were diagnosed with AMD by an ophthalmologist based on fundus photography...
August 18, 2017: Korean Journal of Ophthalmology: KJO
https://www.readbyqxmd.com/read/28913923/an-ipsc-patient-specific-model-of-cfh-y402h-polymorphism-displays-characteristic-features-of-amd-and-indicates-a-beneficial-role-for-uv-light-exposure
#13
Dean Hallam, Joseph Collin, Sanja Bojic, Valeria Chichagova, Adriana Buskin, Yaobo Xu, Lucia Lafage, Elsje G Otten, George Anyfantis, Carla Mellough, Stefan Przyborski, Sameer Alharthi, Viktor Korolchuk, Andrew Lotery, Gabriele Saretzki, Martin McKibbin, Lyle Armstrong, David Steel, David Kavanagh, Majlinda Lako
Age related macular degeneration (AMD) is the most common cause of blindness, accounting for 8.7% of all blindness globally. Vision loss is caused ultimately by apoptosis of the retinal pigment epithelium (RPE) and overlying photoreceptors. Treatments are evolving for the wet form of the disease, however these do not exist for the dry form. Complement factor H (CFH) polymorphism in exon 9 (Y402H) has shown a strong association with susceptibility to AMD resulting in complement activation, recruitment of phagocytes, retinal pigment epithelium (RPE) damage and visual decline...
September 15, 2017: Stem Cells
https://www.readbyqxmd.com/read/28913545/periostin-in-vitreoretinal-diseases
#14
REVIEW
Shigeo Yoshida, Takahito Nakama, Keijiro Ishikawa, Shintaro Nakao, Koh-Hei Sonoda, Tatsuro Ishibashi
Proliferative vitreoretinal diseases such as diabetic retinopathy, proliferative vitreoretinopathy (PVR), and age-related macular degeneration are a leading cause of decreased vision and blindness in developed countries. In these diseases, retinal fibro(vascular) membrane (FVM) formation above and beneath the retina plays an important role. Gene expression profiling of human FVMs revealed significant upregulation of periostin. Subsequent analyses demonstrated increased periostin expression in the vitreous of patients with both proliferative diabetic retinopathy and PVR...
September 14, 2017: Cellular and Molecular Life Sciences: CMLS
https://www.readbyqxmd.com/read/28913517/intravitreal-injection-of-ziv-aflibercept-in-the-treatment-of-choroidal-and-retinal-vascular-diseases
#15
Kamran HodjatJalali, Shiva Mehravaran, Hooshang Faghihi, Hassan Hashemi, Pegah Kazemi, Hadith Rastad
PURPOSE: To investigate the short-term outcomes after intravitreal injection of ziv-aflibercept in the treatment of choroidal and retinal vascular diseases. METHODS: Thirty-four eyes of 29 patients with age-related macular degeneration (AMD), diabetic retinopathy, and retinal vein occlusion (RVO) received a single dose intravitreal injection of 0.05 ml ziv-aflibercept (1.25 mg). Visual acuity, spectral domain optical coherence tomography (SD-OCT) activity, and possible side effects were assessed before and at 1 week and 1 month after the intervention...
September 2017: Journal of Current Ophthalmology
https://www.readbyqxmd.com/read/28912584/niche-harmony-search-algorithm-for-detecting-complex-disease-associated-high-order-snp-combinations
#16
Shouheng Tuo, Junying Zhang, Xiguo Yuan, Zongzhen He, Yajun Liu, Zhaowen Liu
Genome-wide association study is especially challenging in detecting high-order disease-causing models due to model diversity, possible low or even no marginal effect of the model, and extraordinary search and computations. In this paper, we propose a niche harmony search algorithm where joint entropy is utilized as a heuristic factor to guide the search for low or no marginal effect model, and two computationally lightweight scores are selected to evaluate and adapt to diverse of disease models. In order to obtain all possible suspected pathogenic models, niche technique merges with HS, which serves as a taboo region to avoid HS trapping into local search...
September 14, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28912512/assessing-individual-risk-for-amd-with-genetic-counseling-family-history-and-genetic-testing
#17
R Cascella, C Strafella, G Longo, L Manzo, M Ragazzo, C De Felici, S Gambardella, L T Marsella, G Novelli, P Borgiani, F Sangiuolo, A Cusumano, F Ricci, E Giardina
PurposeThe goal was to develop a simple model for predicting the individual risk profile for age-related macular degeneration (AMD) on the basis of genetic information, disease family history, and smoking habits.Patients and methodsThe study enrolled 151 AMD patients following specific clinical and environmental inclusion criteria: age >55 years, positive family history for AMD, presence of at least one first-degree relative affected by AMD, and smoking habits. All of the samples were genotyped for rs1061170 (CFH) and rs10490924 (ARMS2) with a TaqMan assay, using a 7500 Fast Real Time PCR device...
September 15, 2017: Eye
https://www.readbyqxmd.com/read/28912276/cavin-2-regulates-the-activity-and-stability-of-endothelial-nitric-oxide-synthase-enos-in-angiogenesis
#18
Gandhi T K Boopathy, Madhura Kulkarni, Sze Yuan Ho, Adrian Boey, Edmond Wei Min Chua, Veluchamy A Barathi, Tom J Carney, Xiaomeng Wang, Wanjin Hong
Angiogenesis is a highly regulated process for formation of new blood vessels from pre-existing ones. Angiogenesis is dysregulated in various pathologies, including age-related macular degeneration, arthritis, and cancer. Inhibiting pathological angiogenesis therefore represents a promising therapeutic strategy for treating these disorders, highlighting the need to study angiogenesis in more detail. To this end, identifying the genes essential for blood vessel formation and elucidating their function are crucial for a complete understanding of angiogenesis...
September 14, 2017: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/28910435/repeatability-and-reproducibility-of-superficial-macular-retinal-vessel-density-measurements-using-optical-coherence-tomography-angiography-en-face-images
#19
Jianqin Lei, Mary K Durbin, Yue Shi, Akihito Uji, Siva Balasubramanian, Elmira Baghdasaryan, Mayss Al-Sheikh, Srinivas R Sadda
Importance: The repeatability and reproducibility of quantitative metrics from optical coherence tomographic angiography (OCTA) must be assessed before these data can be confidently interpreted in clinical research and practice. Objective: To evaluate the repeatability and reproducibility of OCTA-derived retinal vascular quantitative metrics. Design, Setting and Participants: In this cross-sectional study, 21 healthy volunteers (42 eyes) and 22 patients with retinal disease (22 eyes), including 14 with age-related macular degeneration, 3 with epiretinal membrane, 2 with diabetic retinopathy, 2 with myopic macular degeneration, and 1 with retinal vein occlusion, were enrolled...
September 14, 2017: JAMA Ophthalmology
https://www.readbyqxmd.com/read/28910205/gender-differences-in-the-relationship-between-sex-hormone-deficiency-and-soft-drusen
#20
Han Jo Kwon, Seung Min Lee, Kang Yeun Pak, Sung Who Park, Ji Eun Lee, Ik Soo Byon
PURPOSE: To investigate the association between sex hormone deficiency and soft drusen in women and men. MATERIALS AND METHODS: We retrospectively reviewed the medical records and fundus photographs of subjects who underwent a health screening for additional examination of climacterium and age-related changes including sex hormone status. In women, sex hormone deficiency was defined as cessation of menstruation that had lasted for at least 12 months and follicular stimulating hormone (FSH) levels ≥ 25 mIU/mL; in men, it was defined as testosterone levels ≤ 3...
September 14, 2017: Current Eye Research
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