keyword
MENU ▼
Read by QxMD icon Read
search

retina, macular degeneration

keyword
https://www.readbyqxmd.com/read/28336272/apigenin-7-diglucuronide-protects-retinas-against-bright-light-induced-photoreceptor-degeneration-through-the-inhibition-of-retinal-oxidative-stress-and-inflammation
#1
Minjuan Bian, Yong Zhang, Xiaoye Du, Jing Xu, Jingang Cui, Jiangping Gu, Weiliang Zhu, Teng Zhang, Yu Chen
Vision impairment in retinal degenerative diseases such as age-related macular degeneration is primarily associated with photoreceptor degeneration, in which oxidative stress and inflammatory responses are mechanistically involved as central players. Therapies with photoreceptor protective properties remain to be developed. Apigenin-7-diglucuronide (A7DG), a flavonoid glycoside, is present in an assortment of medicinal plants with anti-inflammatory or ant-oxidant activities. However, the pharmacological significance of A7DG remains unknown in vivo...
March 20, 2017: Brain Research
https://www.readbyqxmd.com/read/28336262/increased-susceptibility-to-fundus-camera-delivered-light-induced-retinal-degeneration-in-mice-deficient-in-oxidative-stress-response-proteins
#2
Yi Ding, Bogale Aredo, Xin Zhong, Cynthia X Zhao, Rafael L Ufret-Vincenty
Oxidative stress is an important contributor to the pathogenesis of many retinal diseases including age-related macular degeneration and retinal dystrophies. Light-induced retinal degeneration (LIRD) can serve as a model in which to study the response of the retina to stress. Of note, many genetic mutant mice are in a C57BL/6 J background and are thus resistant to the usual LIRD models. We recently developed a new model of fundus camera-delivered light-induced retinal degeneration (FCD-LIRD) which is effective in strains of mice expressing the light-resistant variant of RPE65 (450Met), including C57BL/6 J...
March 20, 2017: Experimental Eye Research
https://www.readbyqxmd.com/read/28324113/microrna-expression-patterns-involved-in-amyloid-beta-induced-retinal-degeneration
#3
Peirong Huang, Junran Sun, Fenghua Wang, Xueting Luo, Jingyang Feng, Qing Gu, Te Liu, Xiaodong Sun
Purpose: Dry age-related macular degeneration (AMD) is characterized by the accumulation of drusen under Bruch's membrane, and amyloid beta (Aβ) is speculated to be one of the key pathologic factors. While the detrimental effects of Aβ on retinas have been widely explored, Aβ-induced epigenetic regulatory changes have yet to be fully investigated. We therefore aimed to identify the microRNA (miRNA) expression profiles in an Aβ-induced mouse model of retinal degeneration. Methods: C57BL/6 mice were intravitreally injected with Aβ1-40 or PBS and the eye tissues were collected for hematoxylin and eosin (H&E) staining, apoptosis immunofluorescence staining, and miRNA profiling...
March 1, 2017: Investigative Ophthalmology & Visual Science
https://www.readbyqxmd.com/read/28315667/hif-signalling-the-eyes-have-it
#4
D J Peet, T Kittipassorn, J P Wood, G Chidlow, R J Casson
The hypoxia inducible factors (HIFs) mediate changes in gene expression in response to hypoxia, and mediate key physiological responses such as angiogenesis. They play important roles in development and normal physiology, as well as in ischaemic and other pathologies. The human eye is a complex organ, with tight regulation of vascularisation and oxygen delivery, with the highly specialised retina containing both highly vascularised and avascular regions. This review, written to honour the significant contribution of Lorenz Poellinger to this field, covers the role of the HIFs in normal development of the eye, specifically the vasculature, as well as their roles in numerous retinal pathologies, including ischaemic retinopathies, and age-related macular degeneration (AMD)...
March 15, 2017: Experimental Cell Research
https://www.readbyqxmd.com/read/28315278/peeking-into-sigma-1-receptor-functions-through-the-retina
#5
Timur A Mavlyutov, Lian-Wang Guo
This review discusses recent advances towards understanding the sigma-1 receptor (S1R) as an endogenous neuro-protective mechanism in the retina , a favorable experimental model system. The exquisite architecture of the mammalian retina features layered and intricately wired neurons supported by non-neuronal cells. Ganglion neurons, photoreceptors , as well as the retinal pigment epithelium, are susceptible to degeneration that leads to major retinal diseases such as glaucoma , diabetic retinopathy , and age-related macular degeneration (AMD), and ultimately, blindness...
2017: Advances in Experimental Medicine and Biology
https://www.readbyqxmd.com/read/28301218/retinal-pathology-is-associated-with-increased-blood-retina-barrier-permeability-in-a-diabetic-and-hypercholesterolaemic-pig-model-beneficial-effects-of-the-lppla2-inhibitor-darapladib
#6
Nimish K Acharya, Xin Qi, Eric L Goldwaser, George A Godsey, Hao Wu, Mary C Kosciuk, Theresa A Freeman, Colin H Macphee, Robert L Wilensky, Venkat Venkataraman, Robert G Nagele
Using a porcine model of diabetes mellitus and hypercholesterolaemia, we previously showed that diabetes mellitus and hypercholesterolaemia is associated with a chronic increase in blood-brain barrier permeability in the cerebral cortex, leading to selective binding of immunoglobulin G and deposition of amyloid-beta1-42 peptide in pyramidal neurons. Treatment with Darapladib (GlaxoSmithKline, SB480848), an inhibitor of lipoprotein-associated phospholipase-A2, alleviated these effects. Here, investigation of the effects of chronic diabetes mellitus and hypercholesterolaemia on the pig retina revealed a corresponding increased permeability of the blood-retina barrier coupled with a leak of plasma components into the retina, alterations in retinal architecture, selective IgG binding to neurons in the ganglion cell layer, thinning of retinal layers due to cell loss and increased glial fibrillary acidic protein expression in Müller cells, all of which were curtailed by treatment with Darapladib...
March 1, 2017: Diabetes & Vascular Disease Research
https://www.readbyqxmd.com/read/28297034/the-role-of-posterior-vitreous-detachment-and-vitreomacular-adhesion-in-patients-with-age-related-macular-degeneration
#7
Orhan Ilim, Cezmi Akkin, Zafer Oztas, Serhad Nalcaci, Filiz Afrashi, Cumali Degirmenci, Jale Mentes
BACKGROUND AND OBJECTIVE: The aim of this study was to assess the prevalence of posterior vitreous detachment (PVD) and vitreoretinal interface in patients with age-related macular degeneration (AMD). PATIENTS AND METHODS: This clinical trial included 206 eyes of 138 patients who presented to the authors' clinic between January 2012 and November 2014. Patients were divided into three groups: 98 eyes of 67 patients with exudative AMD, 55 eyes of 36 patients with nonexudative AMD, and 53 eyes of 35 patients having no vitreoretinal disease...
March 1, 2017: Ophthalmic Surgery, Lasers & Imaging Retina
https://www.readbyqxmd.com/read/28296613/autologous-induced-stem-cell-derived-retinal-cells-for-macular-degeneration
#8
Michiko Mandai, Akira Watanabe, Yasuo Kurimoto, Yasuhiko Hirami, Chikako Morinaga, Takashi Daimon, Masashi Fujihara, Hiroshi Akimaru, Noriko Sakai, Yumiko Shibata, Motoki Terada, Yui Nomiya, Shigeki Tanishima, Masahiro Nakamura, Hiroyuki Kamao, Sunao Sugita, Akishi Onishi, Tomoko Ito, Kanako Fujita, Shin Kawamata, Masahiro J Go, Chikara Shinohara, Ken-Ichiro Hata, Masanori Sawada, Midori Yamamoto, Sachiko Ohta, Yasuo Ohara, Kenichi Yoshida, Junko Kuwahara, Yuko Kitano, Naoki Amano, Masafumi Umekage, Fumiyo Kitaoka, Azusa Tanaka, Chihiro Okada, Naoko Takasu, Seishi Ogawa, Shinya Yamanaka, Masayo Takahashi
We assessed the feasibility of transplanting a sheet of retinal pigment epithelial (RPE) cells differentiated from induced pluripotent stem cells (iPSCs) in a patient with neovascular age-related macular degeneration. The iPSCs were generated from skin fibroblasts obtained from two patients with advanced neovascular age-related macular degeneration and were differentiated into RPE cells. The RPE cells and the iPSCs from which they were derived were subject to extensive testing. A surgery that included the removal of the neovascular membrane and transplantation of the autologous iPSC-derived RPE cell sheet under the retina was performed in one of the patients...
March 16, 2017: New England Journal of Medicine
https://www.readbyqxmd.com/read/28289375/hypoxia-inducible-factor-1%C3%AE-target-genes-contribute-to-retinal-neuroprotection
#9
REVIEW
Lin Cheng, Honghua Yu, Naihong Yan, Kunbei Lai, Mengqing Xiang
Hypoxia-inducible factor (HIF) is a transcription factor that facilitates cellular adaptation to hypoxia and ischemia. Long-standing evidence suggests that one isotype of HIF, HIF-1α, is involved in the pathogenesis of various solid tumors and cardiac diseases. However, the role of HIF-1α in retina remains poorly understood. HIF-1α has been recognized as neuroprotective in cerebral ischemia in the past two decades. Additionally, an increasing number of studies has shown that HIF-1α and its target genes contribute to retinal neuroprotection...
2017: Frontiers in Cellular Neuroscience
https://www.readbyqxmd.com/read/28286282/retinal-accumulation-of-zeaxanthin-lutein-and-%C3%AE-carotene-in-mice-deficient-in-carotenoid-cleavage-enzymes
#10
Binxing Li, Preejith P Vachali, Zhengqing Shen, Aruna Gorusupudi, Kelly Nelson, Brian M Besch, Alexis Bartschi, Simone Longo, Ty Mattinson, Saeed Shihab, Nikolay E Polyakov, Lyubov P Suntsova, Alexander V Dushkin, Paul S Bernstein
Carotenoid supplementation can prevent and reduce the risk of age-related macular degeneration (AMD) and other ocular disease, but until now, there has been no validated and well-characterized mouse model which can be employed to investigate the protective mechanism and relevant metabolism of retinal carotenoids. β-Carotene oxygenases 1 and 2 (BCO1 and BCO2) are the only two carotenoid cleavage enzymes found in animals. Mutations of the bco2 gene may cause accumulation of xanthophyll carotenoids in animal tissues, and BCO1 is involved in regulation of the intestinal absorption of carotenoids...
March 9, 2017: Experimental Eye Research
https://www.readbyqxmd.com/read/28282423/age-related-macular-degeneration-phenotypes-are-associated-with-increased-tumor-necrosis-alpha-and-subretinal-immune-cells-in-aged-cxcr5-knockout-mice
#11
Hu Huang, Ying Liu, Lei Wang, Wen Li
The role of chemokine receptor in age-related macular degeneration (AMD) remains elusive. The objective of this study is to investigate the role of chemokine receptor Cxcr5 in the pathogenesis of AMD. Cxcr5 gene expression levels (mRNA and protein) are higher in the retina and retinal pigment epithelium (RPE) of aged C57BL/6 wild type mice than younger ones. Vascular and glial cells express Cxcr5 and its ligand Cxcl13 in mouse retina. Aged Cxcr5 knockout (-/-) mice develop both early and late AMD-like pathological features...
2017: PloS One
https://www.readbyqxmd.com/read/28271607/dissecting-microrna-dysregulation-in-age-related-macular-degeneration-new-targets-for-eye-gene-therapy
#12
REVIEW
Anne Louise Askou, Sidsel Alsing, Andreas Holmgaard, Toke Bek, Thomas J Corydon
MicroRNAs (miRNAs) are key regulators of gene expression in humans. Overexpression or depletion of individual miRNAs is associated with human disease. Current knowledge suggests that the retina is influenced by miRNAs and that dysregulation of miRNAs as well as alterations in components of the miRNA biogenesis machinery are involved in retinal diseases, including age-related macular degeneration (AMD). Furthermore, recent studies have indicated that the vitreous has a specific panel of circulating miRNAs and that this panel varies according to the specific pathological stress experienced by the retinal cells...
March 7, 2017: Acta Ophthalmologica
https://www.readbyqxmd.com/read/28270492/retinal-pigment-epithelial-features-indicative-of-neovascular-progression-in-age-related-macular-degeneration
#13
Philipp K Roberts, Bernhard Baumann, Ferdinand G Schlanitz, Stefan Sacu, Matthias Bolz, Michael Pircher, Michael Hagmann, Christoph K Hitzenberger, Ursula Schmidt-Erfurth
BACKGROUND/AIMS: To identify characteristic retinal pigment epithelium (RPE) changes in fellow eyes of patients with neovascular age-related macular degeneration (nAMD) using polarisation-sensitive optical coherence tomography (PS-OCT). METHODS: Thirty-one fellow eyes of 31 patients with unilateral nAMD were evaluated in this cohort study of a prospective interventional trial. PS-OCT as well as conventional imaging including spectral-domain (SD)-OCT and fluorescein angiography (FA) were performed using a standardised protocol...
March 7, 2017: British Journal of Ophthalmology
https://www.readbyqxmd.com/read/28260075/protective-effect-of-mitochondria%C3%A2-targeted-peptide-mtp%C3%A2-131-against-oxidative-stress%C3%A2-induced-apoptosis-in-rgc%C3%A2-5-cells
#14
Min Chen, Bingqian Liu, Jian Ma, Jian Ge, Kaijun Wang
The retina of the human eye is extremely vulnerable to oxidative damage. Previous studies have demonstrated that oxidative stress is the predominant mechanism associated with the pathogenesis of age‑related macular degeneration, diabetic retinopathy, glaucoma and retinitis pigmentosa. MTP‑131, a novel mitochondria‑targeted peptide, has been demonstrated to specifically concentrate in the inner mitochondria membrane and to exhibit remarkable antioxidant effects both in vitro and in animal models. In the present study, the protective effect of MTP‑131 was evaluated in response to hydrogen peroxide (H2O2)‑induced oxidative damage in a retinal ganglion cell line, RGC‑5...
March 1, 2017: Molecular Medicine Reports
https://www.readbyqxmd.com/read/28253400/long-term-characterization-of-retinal-degeneration-in-royal-college-of-surgeons-rats-using-spectral-domain-optical-coherence-tomography
#15
Renee C Ryals, Michael D Andrews, Shreya Datta, Aaron S Coyner, Cody M Fischer, Yuquan Wen, Mark E Pennesi, Trevor J McGill
Purpose: Prospective treatments for age-related macular degeneration and inherited retinal degenerations are commonly evaluated in the Royal College of Surgeons (RCS) rat before translation into clinical application. Historically, retinal thickness obtained through postmortem anatomic assessments has been a key outcome measure; however, utility of this measurement is limited because it precludes the ability to perform longitudinal studies. To overcome this limitation, the present study was designed to provide a baseline longitudinal quantification of retinal thickness in the RCS rat by using spectral-domain optical coherence tomography (SD-OCT)...
March 1, 2017: Investigative Ophthalmology & Visual Science
https://www.readbyqxmd.com/read/28248824/optical-coherence-tomography-angiography-reveals-blood-flow-in-choroidal-neovascular-membrane-in-remission-phase-of-neovascular-age-related-macular-degeneration
#16
Yusuke Ichiyama, Tomoko Sawada, Yuka Ito, Masashi Kakinoki, Masahito Ohji
PURPOSE: The aim of the study was to investigate blood flow in choroidal neovascular membrane in remission phase of neovascular age-related macular degeneration using optical coherence tomography (OCT) angiography. METHODS: OCT angiography was obtained in eyes with remission phase of neovascular age-related macular degeneration after treatments, defined as no exudative change (such as macular edema, subretinal fluid, and subretinal hemorrhage) observed in eyes without any treatment for neovascular age-related macular degeneration within the previous 6 months...
April 2017: Retina
https://www.readbyqxmd.com/read/28238097/igf-1-mediated-survival-from-induced-death-of-human-primary-cultured-retinal-pigment-epithelial-cells-is-mediated-by-an-akt-dependent-signaling-pathway
#17
Wenhua Zheng, Qian Meng, Haitao Wang, Fengxia Yan, Peter J Little, Xinguo Deng, Shaofen Lin
Degeneration of the human retinal pigmented epithelium (hRPE) is involved in several eye disorders such as age-related macular degeneration (AMD). In this study, we investigated the protective effect of IGF-1 on human primary cultured RPE cells and its underlying mechanism. IGF-1 dose- and time-dependently promoted the survival of RPE cells from serum deprivation. Western blot showed that IGF-1 stimulated the activation of the PI3K/Akt and MAPK pathways in hRPE. Inhibition of the PI3K/Akt pathway by the PI3K-specific inhibitor, LY294002 or inhibition of Akt by Akt-specific inhibitors Akt inhibitor VIII or SN-38, or downregulation Akt with siRNA specific for Akt blocked the effect of IGF-1 on hRPE...
February 25, 2017: Molecular Neurobiology
https://www.readbyqxmd.com/read/28235894/tamoxifen-provides-structural-and-functional-rescue-in-murine-models-of-photoreceptor-degeneration
#18
Xu Wang, Lian Zhao, Yikui Zhang, Wenxin Ma, Shaimar R Gonzalez, Jianguo Fan, Friedrich Kretschmer, Tudor C Badea, Hao Hua Qian, Wai T Wong
Photoreceptor degeneration is a cause of irreversible vision loss in incurable blinding retinal diseases including retinitis pigmentosa and atrophic age-related macular degeneration. We found in two separate mouse models of photoreceptor degeneration that tamoxifen, a selective estrogen receptor modulator and a drug previously linked with retinal toxicity, paradoxically provided potent neuroprotective effects. In a light-induced degeneration model, tamoxifen prevented onset of photoreceptor apoptosis and atrophy, and maintained near-normal levels of electroretinographic responses...
February 24, 2017: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
https://www.readbyqxmd.com/read/28225373/outer-retinal-tubulation-a-case-series
#19
Leticia A Rousso, Julie A Rodman, Brad Sutton, Diana L Shechtman
PURPOSE: The advent of spectral domain optical coherence tomography has led to superb imaging capabilities in addition to enhanced visualization of the retinal layers. Such advancements have led to the identification of a variety of new retinal conditions, including outer retinal tubulations (ORTs). ORTs are ovoid hyporeflective spaces located in the outer retina. The pathogenesis is unclear but seems to involve sublethal injury to the photoreceptors leading to a compensatory reorganization of the photoreceptor layer with the neighboring ellipsoid zone resulting in a hyperreflective border surrounding a central lumen...
March 2017: Optometry and Vision Science: Official Publication of the American Academy of Optometry
https://www.readbyqxmd.com/read/28225371/measurement-of-perceived-stress-in-age-related-macular-degeneration
#20
Bradley E Dougherty, San-San L Cooley, Frederick H Davidorf
PURPOSE: To validate the Perceived Stress Scale (PSS) in patients with age-related macular degeneration (AMD) using Rasch analysis. METHODS: Study participants with AMD were recruited from the retina service of the Department of Ophthalmology at the Ohio State University during clinical visits for treatment or observation. Visual acuity with habitual distance correction was assessed. A 10-item version of the PSS was administered in large print or by reading the items to the patient...
March 2017: Optometry and Vision Science: Official Publication of the American Academy of Optometry
keyword
keyword
76233
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"