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https://www.readbyqxmd.com/read/29236343/relationship-between-reticular-pseudodrusen-and-choroidal-thickness-in-intermediate-age-related-macular-degeneration
#1
Chi Yun Doreen Ho, Jia Jia Lek, Khin Zaw Aung, Myra B McGuinness, Chi D Luu, Robyn H Guymer
IMPORTANCE: Reticular pseudodrusen (RPD) is strongly associated with late age-related macular degeneration (AMD) but their etiology remains unknown. RPD have been associated with reduced choroidal thickness but most studies are limited by small sample size and varying severity of AMD. BACKGROUND: To investigate the relationship between choroidal thickness (ChT) and RPD in eyes with intermediate AMD (iAMD), controlling for variables known to influence ChT. DESIGN: Retrospective cohort study PARTICIPANTS: Participants were recruited from Centre for Eye Research Australia...
December 13, 2017: Clinical & Experimental Ophthalmology
https://www.readbyqxmd.com/read/29234807/development-and-validation-of-a-deep-learning-system-for-diabetic-retinopathy-and-related-eye-diseases-using-retinal-images-from-multiethnic-populations-with-diabetes
#2
Daniel Shu Wei Ting, Carol Yim-Lui Cheung, Gilbert Lim, Gavin Siew Wei Tan, Nguyen D Quang, Alfred Gan, Haslina Hamzah, Renata Garcia-Franco, Ian Yew San Yeo, Shu Yen Lee, Edmund Yick Mun Wong, Charumathi Sabanayagam, Mani Baskaran, Farah Ibrahim, Ngiap Chuan Tan, Eric A Finkelstein, Ecosse L Lamoureux, Ian Y Wong, Neil M Bressler, Sobha Sivaprasad, Rohit Varma, Jost B Jonas, Ming Guang He, Ching-Yu Cheng, Gemmy Chui Ming Cheung, Tin Aung, Wynne Hsu, Mong Li Lee, Tien Yin Wong
Importance: A deep learning system (DLS) is a machine learning technology with potential for screening diabetic retinopathy and related eye diseases. Objective: To evaluate the performance of a DLS in detecting referable diabetic retinopathy, vision-threatening diabetic retinopathy, possible glaucoma, and age-related macular degeneration (AMD) in community and clinic-based multiethnic populations with diabetes. Design, Setting, and Participants: Diagnostic performance of a DLS for diabetic retinopathy and related eye diseases was evaluated using 494 661 retinal images...
December 12, 2017: JAMA: the Journal of the American Medical Association
https://www.readbyqxmd.com/read/29234687/delivery-of-cr2-fh-using-aav-vector-therapy-as-treatment-strategy-in-the-mouse-model-of-choroidal-neovascularization
#3
Gloriane Schnabolk, Nathaniel Parsons, Elisabeth Obert, Balasubramaniam Annamalai, Cecile Nasarre, Stephen Tomlinson, Alfred S Lewin, Bärbel Rohrer
Complement activation plays a significant role in age-related macular degeneration (AMD) pathogenesis, and polymorphisms interfering with factor H (fH) function, a complement alternative pathway (AP) inhibitor, are associated with increased AMD risk. We have previously validated an AP inhibitor, a fusion protein consisting of a complement receptor 2 fragment linked to the inhibitory domain of fH (CR2-fH) as an efficacious treatment for choroidal neovascularization (CNV) when delivered intravenously. Here we tested an alternative approach of AAV-mediated delivery (AAV5-VMD2-CR2-fH or AAV5-VMD2-mCherry) using subretinal delivery in C57BL/6J mice...
June 15, 2018: Molecular Therapy. Methods & Clinical Development
https://www.readbyqxmd.com/read/29234583/synthesis-of-metal-fluoride-nanoparticles-supported-on-thermally-reduced-graphite-oxide
#4
Alexa Schmitz, Kai Schütte, Vesko Ilievski, Juri Barthel, Laura Burk, Rolf Mülhaupt, Junpei Yue, Bernd Smarsly, Christoph Janiak
Metal-fluoride nanoparticles, (MF x -NPs) with M = Fe, Co, Pr, Eu, supported on different types of thermally reduced graphite oxide (TRGO) were obtained by microwave-assisted thermal decomposition of transition-metal amidinates, (M{MeC[N(iPr)]2} n ) or [M(AMD) n ] with M = Fe(II), Co(II), Pr(III), and tris(2,2,6,6-tetramethyl-3,5-heptanedionato)europium, Eu(dpm)3, in the presence of TRGO in the ionic liquid (IL) 1-butyl-3-methylimidazolium tetrafluoroborate ([BMIm][BF4]). The crystalline phases of the metal fluorides synthesized in [BMIm][BF4] were identified by powder X-ray diffraction (PXRD) to be MF2 for M = Fe, Co and MF3 for M = Eu, Pr...
2017: Beilstein Journal of Nanotechnology
https://www.readbyqxmd.com/read/29232163/application-of-mine-water-leaching-protocol-on-coal-fly-ash-to-assess-leaching-characteristics-for-suitability-as-a-mine-backfill-material
#5
Godfrey Madzivire, Koena Ramasenya, Supi Tlowana, Henk Coetzee, Viswanath R K Vadapalli
Over the years, coal mining in the Mpumalanga Province of South Africa has negatively affected the environment by causing pollution of water resources, land subsidence and spontaneous coal combustion. Previous studies show that in-situ treatment of acid mine drainage (AMD) using coal fly ash (CFA) from local power stations was possible and sludge recovered out of such treatment can be used to backfill mines. In this article, the authors have attempted to understand the leaching characteristics of CFA when placed underground as a backfill material using the mine water leaching protocol (MWLP)...
December 12, 2017: Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering
https://www.readbyqxmd.com/read/29232131/a-quantitative-assessment-of-the-energetics-of-dopamine-translocation-by-human-dopamine-transporter
#6
Mary Hongying Cheng, Cihan Kaya, Ivet Bahar
Computational evaluation of the energetics of substrate binding, transport and release events of neurotransmitter transporters at the molecular level is a challenge, as the structural transitions of these membrane proteins involve coupled global and local changes that span time scales of several orders of magnitude, from nanoseconds to seconds. Here, we provide a quantitative assessment of the energetics of dopamine (DA) translocation through the human DA transporter (hDAT), using a combination of molecular modeling, simulations and analysis tools...
December 12, 2017: Journal of Physical Chemistry. B
https://www.readbyqxmd.com/read/29229653/investigation-of-time-to-first-presentation-and-extrahospital-factors-in-the-treatment-of-neovascular-age-related-macular-degeneration-a-retrospective-cross-sectional-study
#7
Peng Yong Sim, Sonul Gajree, Baljean Dhillon, Shyamanga Borooah
OBJECTIVES: To assess the time from symptom onset to treatment for neovascular age-related macular degeneration (nvAMD) and to measure the awareness of AMD in Southeast Scotland. DESIGN: Retrospective cross-sectional study. SETTING: Secondary care, Southeast of Scotland. METHODS: Patients treated with intravitreal therapy (IVT) for nvAMD in Southeast Scotland between 2013 and 2015 were identified using a treatment register...
December 10, 2017: BMJ Open
https://www.readbyqxmd.com/read/29229444/neural-control-of-choroidal-blood-flow
#8
REVIEW
Anton Reiner, Malinda E C Fitzgerald, Nobel Del Mar, Chunyan Li
The choroid is richly innervated by parasympathetic, sympathetic and trigeminal sensory nerve fibers that regulate choroidal blood flow in birds and mammals, and presumably other vertebrate classes as well. The parasympathetic innervation has been shown to vasodilate and increase choroidal blood flow, the sympathetic input has been shown to vasoconstrict and decrease choroidal blood flow, and the sensory input has been shown to both convey pain and thermal information centrally and act locally to vasodilate and increase choroidal blood flow...
December 8, 2017: Progress in Retinal and Eye Research
https://www.readbyqxmd.com/read/29227822/automated-retinal-health-diagnosis-using-pyramid-histogram-of-visual-words-and-fisher-vector-techniques
#9
Joel E W Koh, Eddie Y K Ng, Sulatha V Bhandary, Yuki Hagiwara, Augustinus Laude, U Rajendra Acharya
Untreated age-related macular degeneration (AMD), diabetic retinopathy (DR), and glaucoma may lead to irreversible vision loss. Hence, it is essential to have regular eye screening to detect these eye diseases at an early stage and to offer treatment where appropriate. One of the simplest, non-invasive and cost-effective techniques to screen the eyes is by using fundus photo imaging. But, the manual evaluation of fundus images is tedious and challenging. Further, the diagnosis made by ophthalmologists may be subjective...
December 5, 2017: Computers in Biology and Medicine
https://www.readbyqxmd.com/read/29225722/cellular-senescence-in-age-related-macular-degeneration-can-autophagy-and-dna-damage-response-play-a-role
#10
REVIEW
Janusz Blasiak, Malgorzata Piechota, Elzbieta Pawlowska, Magdalena Szatkowska, Ewa Sikora, Kai Kaarniranta
Age-related macular degeneration (AMD) is the main reason of blindness in developed countries. Aging is the main AMD risk factor. Oxidative stress, inflammation and some genetic factors play a role in AMD pathogenesis. AMD is associated with the degradation of retinal pigment epithelium (RPE) cells, photoreceptors, and choriocapillaris. Lost RPE cells in the central retina can be replaced by their peripheral counterparts. However, if they are senescent, degenerated regions in the macula cannot be regenerated...
2017: Oxidative Medicine and Cellular Longevity
https://www.readbyqxmd.com/read/29225397/concurrent-oct-imaging-of-stimulus-evoked-retinal-neural-activation-and-hemodynamic-responses
#11
Taeyoon Son, Benquan Wang, Yiming Lu, Yanjun Chen, Dingcai Cao, Xincheng Yao
It is well established that major retinal diseases involve distortions of the retinal neural physiology and blood vascular structures. However, the details of distortions in retinal neurovascular coupling associated with major eye diseases are not well understood. In this study, a multi-modal optical coherence tomography (OCT) imaging system was developed to enable concurrent imaging of retinal neural activity and vascular hemodynamics. Flicker light stimulation was applied to mouse retinas to evoke retinal neural responses and hemodynamic changes...
2017: Proceedings of SPIE
https://www.readbyqxmd.com/read/29224928/association-of-rare-predicted-loss-of-function-variants-in-cellular-pathways-with-sub-phenotypes-in-age-related-macular-degeneration
#12
Alexandra Pietraszkiewicz, Freekje van Asten, Alan Kwong, Rinki Ratnapriya, Goncalo Abecasis, Anand Swaroop, Emily Y Chew
PURPOSE: To investigate the association of rare predicted loss-of-function (pLoF) variants within age-related macular degeneration (AMD) risk loci and AMD sub-phenotypes. DESIGN: Case-control study. PARTICIPANTS: Participants of AREDS, AREDS2, and Michigan Genomics Initiative. METHODS: Whole genome sequencing data were analyzed for rare pLoF variants (frequency <0.1%) in the regions of previously identified 52 independent risk variants known to be associated with AMD...
December 7, 2017: Ophthalmology
https://www.readbyqxmd.com/read/29224926/fully-automated-detection-and-quantification-of-macular-fluid-in-oct-using-deep-learning
#13
Thomas Schlegl, Sebastian M Waldstein, Hrvoje Bogunovic, Franz Endstraßer, Amir Sadeghipour, Ana-Maria Philip, Dominika Podkowinski, Bianca S Gerendas, Georg Langs, Ursula Schmidt-Erfurth
PURPOSE: Development and validation of a fully automated method to detect and quantify macular fluid in conventional OCT images. DESIGN: Development of a diagnostic modality. PARTICIPANTS: The clinical dataset for fluid detection consisted of 1200 OCT volumes of patients with neovascular age-related macular degeneration (AMD, n = 400), diabetic macular edema (DME, n = 400), or retinal vein occlusion (RVO, n = 400) acquired with Zeiss Cirrus (Carl Zeiss Meditec, Dublin, CA) (n = 600) or Heidelberg Spectralis (Heidelberg Engineering, Heidelberg, Germany) (n = 600) OCT devices...
December 8, 2017: Ophthalmology
https://www.readbyqxmd.com/read/29224056/a-5-year-multicenter-prospective-cohort-study-on-the-long-term-visual-prognosis-and-predictive-factors-for-visual-outcome-in-japanese-patients-with-age-related-macular-degeneration-the-amd2000-study
#14
Yumiko Akagi-Kurashige, Akitaka Tsujikawa, Mitsuko Yuzawa, Tatsuro Ishibashi, Hideo Nakanishi, Eiji Nakatani, Satoshi Teramukai, Masanori Fukushima, Nagahisa Yoshimura
PURPOSE: In this study (AMD2000), we aimed to determine the visual prognosis of Japanese patients with age-related macular degeneration (AMD). METHODS: This was a multicenter prospective observational cohort study. In total, 460 patients with AMD were recruited from April 2006 to March 2009 from 18 clinical trial sites in Japan. They were followed up for 5 years, as they continued to receive medical treatment. RESULTS: Of the 409 study eyes followed up for at least 1 year, 243 eyes (59...
December 9, 2017: Japanese Journal of Ophthalmology
https://www.readbyqxmd.com/read/29223681/language-processing-in-age-related-macular-degeneration-associated-with-unique-functional-connectivity-signatures-in-the-right-hemisphere
#15
Jie Zhuang, David J Madden, Xuan Duong-Fernandez, Nan-Kuei Chen, Scott W Cousins, Guy G Potter, Michele T Diaz, Heather E Whitson
Age-related macular degeneration (AMD) is a retinal disease associated with significant vision loss among older adults. Previous large-scale behavioral studies indicate that people with AMD are at increased risk of cognitive deficits in language processing, particularly in verbal fluency tasks. The neural underpinnings of any relationship between AMD and higher cognitive functions, such as language processing, remain unclear. This study aims to address this issue using independent component analysis of spontaneous brain activity at rest...
November 14, 2017: Neurobiology of Aging
https://www.readbyqxmd.com/read/29222443/metabolic-versatility-of-small-archaea-micrarchaeota-and-parvarchaeota
#16
Lin-Xing Chen, Celia Méndez-García, Nina Dombrowski, Luis E Servín-Garcidueñas, Emiley A Eloe-Fadrosh, Bao-Zhu Fang, Zhen-Hao Luo, Sha Tan, Xiao-Yang Zhi, Zheng-Shuang Hua, Esperanza Martinez-Romero, Tanja Woyke, Li-Nan Huang, Jesús Sánchez, Ana Isabel Peláez, Manuel Ferrer, Brett J Baker, Wen-Sheng Shu
Small acidophilic archaea belonging to Micrarchaeota and Parvarchaeota phyla are known to physically interact with some Thermoplasmatales members in nature. However, due to a lack of cultivation and limited genomes on hand, their biodiversity, metabolisms, and physiologies remain largely unresolved. Here, we obtained 39 genomes from acid mine drainage (AMD) and hot spring environments around the world. 16S rRNA gene based analyses revealed that Parvarchaeota were only detected in AMD and hot spring habitats, while Micrarchaeota were also detected in others including soil, peat, hypersaline mat, and freshwater, suggesting a considerable higher diversity and broader than expected habitat distribution for this phylum...
December 8, 2017: ISME Journal
https://www.readbyqxmd.com/read/29220114/treat-and-extend-versus-every-other-month-regimens-with-aflibercept-in-age-related-macular-degeneration
#17
Akira Haga, Takahiro Kawaji, Ryuichi Ideta, Yasuya Inomata, Hidenobu Tanihara
PURPOSE: To compare the 1-year outcomes of treat-and-extend (TAE) and every-other-month (2M) regimens with intravitreal aflibercept in Japanese wet age-related macular degeneration (AMD) patients. METHODS: Prospective, multicenter, randomized clinical trial. The primary outcome measure was the proportion of eyes in which the best-corrected visual acuity (BCVA) was maintained at week 52 [with a loss of <0.3 logarithm of minimum angular of resolution (logMAR) units]...
December 8, 2017: Acta Ophthalmologica
https://www.readbyqxmd.com/read/29219960/exploring-factors-predicting-changes-in-patients-expectations-and-psychosocial-issues-during-the-course-of-treatment-with-intravitreal-injections-for-wet-age-related-macular-degeneration
#18
S Sii, P Aspinall, S Borooah, B Dhillon
PurposePatients with wet age-related macular degeneration (AMD) often require long courses of treatment. We investigate the psychosocial issues that could hinder compliance, including patient expectations of treatment. The aims of this study were to explore the factors related to changes in patient expectations, pain, and anxiety during treatment.Patients and methodsA structured interview was carried out among 50 patients selected from the list attending the AMD unit at the Princess Alexandra Eye Pavilion (PAEP)...
December 8, 2017: Eye
https://www.readbyqxmd.com/read/29214051/cytochrome-b5-protects-photoreceptors-from-light-stress-induced-lipid-peroxidation-and-retinal-degeneration
#19
Xinping Chen, Hana Hall, Jeffrey P Simpson, Walter D Leon-Salas, Donald F Ready, Vikki M Weake
Lipid peroxides are generated by oxidative stress in cells, and contribute to ageing and neurodegenerative disease. The eye is at special risk for lipid peroxidation because photoreceptors possess amplified sensory membranes rich in peroxidation-susceptible polyunsaturated fatty acids. Light-induced lipid peroxidation in the retina contributes to retinal degeneration, and lipid peroxidation has been implicated in the progression of age-associated ocular diseases such as age-related macular degeneration (AMD)...
2017: NPJ Aging and Mechanisms of Disease
https://www.readbyqxmd.com/read/29212537/association-of-arms2-genotype-with-response-to-anti-vascular-endothelial-growth-factor-treatment-in-polypoidal-choroidal-vasculopathy
#20
Un Chul Park, Joo Young Shin, Hum Chung, Hyeong Gon Yu
BACKGROUND: To investigate whether genetic risk variants for age-related macular degeneration (AMD) are associated with response to intravitreal anti-vascular endothelial growth factor (VEGF) in polypoidal choroidal vasculopathy (PCV) patients. METHODS: This prospective cohort study included 95 treatment-naïve patients that underwent anti-VEGF treatment for PCV for 12 months. Patients were genotyped for 10 single nucleotide polymorphisms in eight AMD-relevant genes...
December 7, 2017: BMC Ophthalmology
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