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Retinal vascular disease

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https://www.readbyqxmd.com/read/28101412/visualization-of-micro-capillaries-using-optical-coherence-tomography-angiography-with-and-without-adaptive-optics
#1
Matthias Salas, Marco Augustin, Laurin Ginner, Abhishek Kumar, Bernhard Baumann, Rainer Leitgeb, Wolfgang Drexler, Sonja Prager, Julia Hafner, Ursula Schmidt-Erfurth, Michael Pircher
The purpose of this work is to investigate the benefits of adaptive optics (AO) technology for optical coherence tomography angiography (OCTA). OCTA has shown great potential in non-invasively enhancing the contrast of vessels and small capillaries. Especially the capability of the technique to visualize capillaries with a lateral extension that is below the transverse resolution of the system opens unique opportunities in diagnosing retinal vascular diseases. However, there are some limitations of this technology such as shadowing and projection artifacts caused by overlying vasculature or the inability to determine the true extension of a vessel...
January 1, 2017: Biomedical Optics Express
https://www.readbyqxmd.com/read/28100839/tyrosine-kinase-blocking-collagen-iv-derived-peptide-suppresses-ocular-neovascularization-and-vascular-leakage
#2
Raquel Lima E Silva, Yogita Kanan, Adam C Mirando, Jayoung Kim, Ron B Shmueli, Valeria E Lorenc, Seth D Fortmann, Jason Sciamanna, Niranjan B Pandey, Jordan J Green, Aleksander S Popel, Peter A Campochiaro
Vascular endothelial growth factor (VEGF)-neutralizing proteins provide benefit in several retinal and choroidal vascular diseases, but some patients still experience suboptimal outcomes, and the need for frequent intraocular injections is a barrier to good outcomes. A mimetic peptide derived from collagen IV, AXT107, suppressed subretinal neovascularization (NV) in two mouse models predictive of effects in neovascular age-related macular degeneration (NVAMD) and inhibited retinal NV in a model predictive of effects in ischemic retinopathies...
January 18, 2017: Science Translational Medicine
https://www.readbyqxmd.com/read/28092344/choriocapillaris-signal-voids-in-maternally-inherited-diabetes-and-deafness-and-in-pseudoxanthoma-elasticum
#3
Richard F Spaide
PURPOSE: To evaluate the pattern of choriocapillaris signal voids in maternally inherited diabetes and deafness and in pseudoxanthoma elasticum in eyes before the development of any geographic atrophy. METHODS: The choriocapillaris under the central macula was imaged with the Optovue RTVue XR Avanti using a 10 μm slab thickness. Automatic local thresholding of the resultant raw data extracted areas of absent flow signal, called signal voids, and these were counted and logarithmically binned...
January 13, 2017: Retina
https://www.readbyqxmd.com/read/28073426/the-prevention-and-treatment-of-retinal-complications-in-diabetes
#4
Susanne Gabriele Schorr, Hans-Peter Hammes, Ulrich Alfons Müller, Heinz-Harald Abholz, Rüdiger Landgraf, Bernd Bertram
BACKGROUND: Microvascular complications of diabetes mellitus can cause retino pathy and maculopathy, which can irreversibly damage vision and lead to blindness. The prevalence of retinopathy is 9-16% in patients with type 2 diabetes and 24-27% in patients with type 1 diabetes. 0.2-0.5% of diabetics are blind. METHODS: The National Disease Management Guideline on the prevention and treatment of retinal complications in diabetes was updated according to recommendations developed by seven scientific medical societies and organizations and by patient representatives and then approved in a formal consensus process...
December 2, 2016: Deutsches Ärzteblatt International
https://www.readbyqxmd.com/read/28061822/cardiovascular-risk-and-endothelial-function-in-people-living-with-hiv-aids-design-of-the-multi-site-longitudinal-endoafrica-study-in-the-western-cape-province-of-south-africa
#5
Hans Strijdom, Patrick De Boever, Gerhard Walzl, M Faadiel Essop, Tim S Nawrot, Ingrid Webster, Corli Westcott, Nyiko Mashele, Frans Everson, Stephanus T Malherbe, Kim Stanley, Harald H Kessler, Evelyn Stelzl, Nandu Goswami
BACKGROUND: There is growing evidence of an interaction between HIV-infection, anti-retroviral therapy (ART) and cardiovascular diseases (CVD). Epidemiological studies in Europe and North America have been observing a shift towards an increased incidence of coronary heart disease and acute myocardial infarctions in HIV-infected populations compared to the general population even after adjusting for traditional cardiovascular risk factors. Despite South Africa (and sub-Saharan Africa, SSA) being regarded as the epicentre of the global HIV epidemic, very little is known about the prevalence of cardiovascular risk factors and precursors of vascular disease in HIV-infected populations in this region...
January 7, 2017: BMC Infectious Diseases
https://www.readbyqxmd.com/read/28060586/evidence-based-treatment-of-diabetic-macular-edema
#6
Rasha Barham, Hala El Rami, Jennifer K Sun, Paolo S Silva
Diabetes mellitus is a chronic disease that affects 415 million people worldwide. Despite treatment advances, diabetic eye disease remains a leading cause of vision loss worldwide. Diabetic macular edema (DME) is a common cause of vision loss in diabetic patients. The pathophysiology is complex and involves multiple pathways that ultimately lead to central retinal thickening and, if untreated, visual loss. First-line treatment of DME has evolved from focal/grid laser established by the Early Treatment of Diabetic Retinopathy Study (ETDRS) to intravitreous pharmacologic therapy...
2017: Seminars in Ophthalmology
https://www.readbyqxmd.com/read/28057793/protein-interactions-at-endothelial-junctions-and-signaling-mechanisms-regulating-endothelial-permeability
#7
REVIEW
Yulia A Komarova, Kevin Kruse, Dolly Mehta, Asrar B Malik
The monolayer of endothelial cells lining the vessel wall forms a semipermeable barrier (in all tissue except the relatively impermeable blood-brain and inner retinal barriers) that regulates tissue-fluid homeostasis, transport of nutrients, and migration of blood cells across the barrier. Permeability of the endothelial barrier is primarily regulated by a protein complex called adherens junctions. Adherens junctions are not static structures; they are continuously remodeled in response to mechanical and chemical cues in both physiological and pathological settings...
January 6, 2017: Circulation Research
https://www.readbyqxmd.com/read/28057519/col4a1-mutation-generates-vascular-abnormalities-correlated-with-neuronal-damage-in-a-mouse-model-of-hanac-syndrome
#8
Alix Trouillet, Henri Lorach, Elisabeth Dubus, Brahim El Mathari, Ivana Ivkovic, Julie Dégardin, Manuel Simonutti, Michel Paques, Xavier Guillonneau, Florian Sennlaub, José-Alain Sahel, Pierre Ronco, Emmanuelle Plaisier, Serge Picaud
: The HANAC syndrome is caused by mutations in the gene coding for collagen4a1, a major component of blood vessel basement membranes. Ocular symptoms include an increase in blood vessel tortuosity and occasional hemorrhages. To examine how vascular defects can affect neuronal function, we analyzed the retinal phenotype of a HANAC mouse model. Heterozygous mutant mice displayed both a thinning of the basement membrane in retinal blood vessels and in Bruch's membrane resulting in vascular leakage...
January 3, 2017: Neurobiology of Disease
https://www.readbyqxmd.com/read/28033697/management-of-retinal-vein-occlusion-who-is-responsible
#9
Mohamadreza Aghamirsalim, Reza Sorbi, Mohammadreza Naderian, Sudha Cugati, Marianne Levon Shahsuvaryan, Maryam Ghazizadeh Hashemi
Retinal vein occlusion (RVO) is a common retinal vascular occlusive disorder and is associated with a variety of systemic risk factors. The aim of this study was to investigate whether the underlying diseases were evaluated and managed appropriately by ophthalmologists. We performed a study of 1344 patients with retinal vein occlusion (RVO). Patients were evaluated with a questionnaire including ten closed questions to determine whether ophthalmologists evaluated and informed their patients about the underlying systemic diseases...
November 2016: Acta Medica Iranica
https://www.readbyqxmd.com/read/28033220/18f-fdg-and-68ga-dotatate-pet-ct-in-von-hippel-lindau-disease-associated-retinal-hemangioblastoma
#10
Georgios Z Papadakis, Corina Millo, Inderbir S Jassel, Ulas Bagci, Samira M Sadowski, Apostolos H Karantanas, Nicholas J Patronas
Retinal hemangioblastomas are highly vascular benign tumors that can be encountered either sporadically or within the von Hippel-Lindau (VHL) syndrome. We report a case of a VHL patient with retinal hemangioblastoma who underwent PET/CT scans using F-FDG and Ga-DOTATATE. The tumor showed low-level F-FDG and increased Ga-DOTATATE activity, suggesting cell-surface overexpression of somatostatin receptors. The presented case indicates the clinical applications of somatostatin receptor imaging with Ga-DOTA-conjugated peptides in detection and follow-up of VHL manifestations, screening of asymptomatic gene carriers, and in diagnosis of sporadic retinal hemangioblastomas, which may have similar features on MRI with other retinal tumors...
December 28, 2016: Clinical Nuclear Medicine
https://www.readbyqxmd.com/read/28025091/stereopsis-in-end-stage-renal-disease-esrd
#11
Daniel J W Jones, John P Harris, Laurie T Butler, Emma C Vaux
We investigated an effect of end-stage renal disease (ESRD) on the visual system by measuring the ability of 21 patients to perceive depth in the random dot stereograms and circles of the Randot Test. To control for other factors which might influence performance on the tests of stereopsis, patients were compared with healthy controls matched for age, years of education, IQ, and general cognitive ability. Vernier acuity (thought to reflect mainly central processing) and Landolt acuity (more sensitive to retinal and optical abnormalities) were also measured, but the study did not include a formal ophthalmological examination...
December 23, 2016: Physiology & Behavior
https://www.readbyqxmd.com/read/28018938/computer-aided-diagnosis-of-retinopathy-in-retinal-fundus-images-of-preterm-infants-via-quantification-of-vascular-tortuosity
#12
Faraz Oloumi, Rangaraj M Rangayyan, Anna L Ells
Retinopathy of prematurity (ROP), a disorder of the retina occurring in preterm infants, is the leading cause of preventable childhood blindness. An active phase of ROP that requires treatment is associated with the presence of plus disease, which is diagnosed clinically in a qualitative manner by visual assessment of the existence of a certain level of increase in the thickness and tortuosity of retinal vessels. The present study performs computer-aided diagnosis (CAD) of plus disease via quantitative measurement of tortuosity in retinal fundus images of preterm infants...
October 2016: Journal of Medical Imaging
https://www.readbyqxmd.com/read/28010951/utility-of-ward-based-retinal-photography-in-stroke-patients
#13
Shaun Frost, Michael Brown, Verity Stirling, Janardhan Vignarajan, David Prentice, Yogesan Kanagasingam
BACKGROUND: Improvements in acute care of stroke patients have decreased mortality, but survivors are still at increased risk of future vascular events and mitigation of this risk requires thorough assessment of the underlying factors leading to the stroke. The brain and eye share a common embryological origin and numerous similarities exist between the small vessels of the retina and brain. Recent population-based studies have demonstrated a close link between retinal vascular changes and stroke, suggesting that retinal photography could have utility in assessing underlying stroke risk factors and prognosis after stroke...
December 20, 2016: Journal of Stroke and Cerebrovascular Diseases: the Official Journal of National Stroke Association
https://www.readbyqxmd.com/read/28008140/choroidal-microvascular-proliferation-secondary-to-diabetes-mellitus
#14
Rui Hua, Qing Li, Ian Yat Hin Wong, Hong Ning, Hailin Wang
Diabetes is a common endocrine disorder associated with peripheral microvascular diseases such as proliferative retinal microangiopathy (or diabetic retinopathy), which may lead to blindness. Unfortunately, diabetic microvascular abnormalities in the choroid are underestimated in clinical practice. Recent literature has revealed that the severity of diabetic retinopathy is aggravated by choroidopathy resulting from hyperglycemia. Here, we introduce a case of diabetic retinopathy with choroidal neovascularization membrane but without signs of retinal microvascular proliferation or drusen...
December 19, 2016: Oncotarget
https://www.readbyqxmd.com/read/28005669/correlation-of-multimodal-imaging-in-sickle-cell-retinopathy
#15
Khalil Ghasemi Falavarjani, Adrienne W Scott, Kang Wang, Ian C Han, Xuejing Chen, Michael Klufas, Jean-Pierre Hubschman, Steven D Schwartz, Srinivas R Sadda, David Sarraf, Irena Tsui
PURPOSE: To correlate macular findings on spectral domain optical coherence tomography (SDOCT) and optical coherence tomography angiography (OCTA) with quantitative ischemic index calculations on ultra-wide-field fluorescein angiography (UWFFA) in patients with sickle cell retinopathy. METHODS: In this retrospective case series, SDOCT, OCTA, and UWFFA images of patients with sickle cell retinopathy were evaluated. Eyes were staged based on the Goldberg classification of proliferative sickle cell retinopathy...
December 2016: Retina
https://www.readbyqxmd.com/read/28004126/the-hif-1-antagonist-acriflavine-visualization-in-retina-and-suppression-of-ocular-neovascularization
#16
Mingbing Zeng, Jikui Shen, Yuanyuan Liu, Lucy Yang Lu, Kun Ding, Seth D Fortmann, Mahmood Khan, Jiangxia Wang, Sean F Hackett, Gregg L Semenza, Peter A Campochiaro
: Acriflavine, a fluorescent drug previously used for bacterial and trypanosomal infections, reduces hypoxia-inducible factor-1 (HIF-1) and HIF-2 transcriptional activity. In mice with oxygen-induced ischemic retinopathy, intraocular or intraperitoneal injections of acriflavine caused dose-dependent suppression of retinal neovascularization (NV) and significantly reduced expression of HIF-1-responsive genes. Intraocular injection of 100 ng caused inner retina fluorescence within 1 h that was seen throughout the entire retina between 1 and 5 days, and at 7 days after injection, strongly suppressed choroidal NV at Bruch's membrane rupture sites...
December 21, 2016: Journal of Molecular Medicine: Official Organ of the "Gesellschaft Deutscher Naturforscher und Ärzte"
https://www.readbyqxmd.com/read/28003035/the-ontario-neurodegenerative-disease-research-initiative-ondri
#17
Sali M K Farhan, Robert Bartha, Sandra E Black, Dale Corbett, Elizabeth Finger, Morris Freedman, Barry Greenberg, David A Grimes, Robert A Hegele, Chris Hudson, Peter W Kleinstiver, Anthony E Lang, Mario Masellis, William E McIlroy, Paula M McLaughlin, Manuel Montero-Odasso, David G Munoz, Douglas P Munoz, Stephen Strother, Richard H Swartz, Sean Symons, Maria Carmela Tartaglia, Lorne Zinman, Michael J Strong
Because individuals develop dementia as a manifestation of neurodegenerative or neurovascular disorder, there is a need to develop reliable approaches to their identification. We are undertaking an observational study (Ontario Neurodegenerative Disease Research Initiative [ONDRI]) that includes genomics, neuroimaging, and assessments of cognition as well as language, speech, gait, retinal imaging, and eye tracking. Disorders studied include Alzheimer's disease, amyotrophic lateral sclerosis, frontotemporal dementia, Parkinson's disease, and vascular cognitive impairment...
December 22, 2016: Canadian Journal of Neurological Sciences. le Journal Canadien des Sciences Neurologiques
https://www.readbyqxmd.com/read/28000166/current-perspectives-on-the-use-of-anti-vegf-drugs-as-adjuvant-therapy-in-glaucoma
#18
REVIEW
Vanessa Andrés-Guerrero, Lucía Perucho-González, Julián García-Feijoo, Laura Morales-Fernández, Federico Saenz-Francés, Rocío Herrero-Vanrell, Luis Pablo Júlvez, Vicente Polo Llorens, José María Martínez-de-la-Casa, Anastasios-Georgios P Konstas
The approval of one of the first anti-vascular endothelial growth factor (VEGF) agents for the treatment of neovascular age-related macular degeneration one decade ago marked the beginning of a new era in the management of several sight-threatening retinal diseases. Since then, emerging evidence has demonstrated the utility of these therapies for the treatment of other ocular conditions characterized by elevated VEGF levels. In this article we review current perspectives on the use of anti-VEGF drugs as adjuvant therapy in the management of neovascular glaucoma (NVG)...
December 20, 2016: Advances in Therapy
https://www.readbyqxmd.com/read/27998457/-the-application-of-ultra-wide-field-angiography-in-the-evaluation-and-management-of-patients-with-posterior-and-panuveitis
#19
Y Chi, C Y Guo, Y Peng, L J Qiao, L Yang
Objective: To evaluate the clinical application of ultra-wide-field fluorescein angiography in posterior and panuveitis patients. Methods: It's a prospective, observational case series study. A total of 82 eyes of 42 patients conformed to the research criteria of posterior and panuveitis. Clinical examinations, conventional fluorescein angiography and ultra-wide-field fluorescein angiograms were performed for each patient. The main outcome was the detection of peripheral retinal changes by ultra-wide-field fluorescein angiography, and how these changes influenced the evaluation and management of the disease...
December 11, 2016: [Zhonghua Yan Ke za Zhi] Chinese Journal of Ophthalmology
https://www.readbyqxmd.com/read/27994812/idiopathic-multifocal-choroiditis
#20
REVIEW
Ali Tavallali, Lawrence A Yannuzzi
Idiopathic multifocal choroiditis (MFC) and/or punctate inner choroidopathy (PIC) describe a chronic progressive bilateral inflammatory chorioretinopathy that predominantly affect healthy myopic white women with no known associated systemic or ocular diseases. The principal sites of involvement are the retinal pigment epithelium (RPE) and outer retinal spaces; the choroid is not affected during the active phase of the disease. Idiopathic MFC with atrophy is a recently described variant. Although there is no generally accepted standard treatment, anti-inflammatory and anti-VEGF (vascular endothelial growth factor) agents are necessary in the acute stage to control the inflammation and choroidal neovascularization (CNV)...
October 2016: Journal of Ophthalmic & Vision Research
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