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macula degeneration

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https://www.readbyqxmd.com/read/29774302/ocular-histopathology-and-immunohistochemical-analysis-in-the-oldest-known-individual-with-autosomal-dominant-vitreoretinochoroidopathy
#1
Morton F Goldberg, Scott McLeod, Mark Tso, Kirk Packo, Malia Edwards, Imran A Bhutto, Rajkumar Baldeosingh, Charles Eberhart, Bernhard H F Weber, Gerard A Lutty
Purpose: To assess the immunohistochemical and histopathological changes in a subject with Autosomal Dominant Vitreoretinochoroidopathy (ADVIRC). Design: Case study. Participant: Ninety two year-old Caucasian male with ADVIRC. Methods: The subject was documented clinically for 54 Years. The retina/choroid complex of the right eye was evaluated with cryosections stained with hematoxylin and eosin or periodic acid schiff reagent...
April 2018: Ophthalmology Retina
https://www.readbyqxmd.com/read/29760571/multiple-extrafoveal-macular-holes-following-internal-limiting-membrane-peeling
#2
Nazimul Hussain, Sandip Mitra
Objective: Internal limiting membrane (ILM) peeling has been the standard of treatment for macular holes. Besides, causing retinal nerve fiber layer surface abnormality, postoperative extrafoveal multiple retinal holes is a rare phenomenon following ILM peeling. We report an unusual complication of eight extrafoveal macular holes occurring following ILM peeling. Case presentation: A 60-year-old male presented with complaints of decreased and distorted vision in the right eye...
2018: International Medical Case Reports Journal
https://www.readbyqxmd.com/read/29760528/lrrtm4-c538y-novel-gene-mutation-is-associated-with-hereditary-macular-degeneration-with-novel-dysfunction-of-on-type-bipolar-cells
#3
Yuichi Kawamura, Akiko Suga, Takuro Fujimaki, Kazutoshi Yoshitake, Kazushige Tsunoda, Akira Murakami, Takeshi Iwata
The macula is a unique structure in higher primates, where cone and rod photoreceptors show highest density in the fovea and the surrounding area, respectively. The hereditary macular dystrophies represent a heterozygous group of rare disorders characterized by central visual loss and atrophy of the macula and surrounding retina. Here we report an atypical absence of ON-type bipolar cell response in a Japanese patient with autosomal dominant macular dystrophy (adMD). To identify a causal genetic mutation for the adMD, we performed whole-exome sequencing (WES) on four affected and four-non affected members of the family for three generations, and identified a novel p...
May 14, 2018: Journal of Human Genetics
https://www.readbyqxmd.com/read/29721998/cell-transplantation-for-retinal-degeneration-transition-from-rodent-to-nonhuman-primate-models
#4
Trevor J McGill, David J Wilson, Jonathan Stoddard, Lauren M Renner, Martha Neuringer
Transplantation of potentially therapeutic cells into the subretinal space is a promising prospective therapy for the treatment of retinal degenerative diseases including age-related macular degeneration (AMD). In rodent models with photoreceptor degeneration, subretinal transplantation of cell suspensions has repeatedly been demonstrated to rescue behaviorally measured vision, maintain electrophysiological responses from the retina and the brain, and slow the degeneration of rod and cone photoreceptors for extended periods...
2018: Advances in Experimental Medicine and Biology
https://www.readbyqxmd.com/read/29721926/anaphylatoxin-signaling-in-retinal-pigment-and-choroidal-endothelial-cells-characteristics-and-relevance-to-age-related-macular-degeneration
#5
Bärbel Rohrer
Age-related macular degeneration (AMD) is the leading cause of blindness in the USA. Polymorphisms in various complement components are associated with an increased risk for AMD, and it has been hypothesized that an overactive complement system is partially responsible for the pathology of AMD. AMD is classified as early, intermediate, or late AMD, depending on the degree of the associated pathologies. Late AMD can be characterized as either lesions associated with neovascular AMD or geographic atrophy. Both sets of lesions are associated with pathology at the RPE/choroid interface, which include a thickening of Bruch's membrane, presence of drusen, and pigmentary alterations, and deterioration of the blood-retina barrier has been reported...
2018: Advances in Experimental Medicine and Biology
https://www.readbyqxmd.com/read/29696099/individual-test-point-fluctuations-of-macular-sensitivity-in-healthy-eyes-and-eyes-with-age-related-macular-degeneration-measured-with-microperimetry
#6
Mirella Telles Salgueiro Barboni, Zsuzsanna Szepessy, Dora Fix Ventura, János Németh
Purpose: To establish fluctuation limits, it was considered that not only overall macular sensitivity but also fluctuations of individual test points in the macula might have clinical value. Methods: Three repeated measurements of microperimetry were performed using the Standard Expert test of Macular Integrity Assessment (MAIA) in healthy subjects ( N = 12, age = 23.8 ± 1.5 years old) and in patients with age-related macular degeneration (AMD) ( N = 11, age = 68...
April 2018: Translational Vision Science & Technology
https://www.readbyqxmd.com/read/29686895/efficacy-of-diacetate-esters-of-macular-carotenoids-effect-of-supplementation-on-macular-pigment
#7
Richard A Bone, John T Landrum, Anirbaan Mukherjee
The accumulation of the carotenoids lutein, zeaxanthin, and mesozeaxanthin in the center of the human retina, and known as the macula lutea or macular pigment, is believed to protect the retina from age-related macular degeneration. Since the macular pigment is of dietary origin, supplements containing the relevant carotenoids are readily available. In this study, we compared the changes in macular pigment over a 24-week supplementation period for two groups of 24 subjects each assigned to either of two supplement formulations, 20 mg/day of lutein or 20 mg equivalent free carotenoids of a combination of diacetate esters of the macular carotenoids...
2018: Journal of Nutrition and Metabolism
https://www.readbyqxmd.com/read/29661534/a-new-chlorin-formulation-promotes-efficient-photodynamic-action-in-choriocapillaris-of-rabbit-s-eyes
#8
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/29658796/lichen-sclerosus-of-the-oral-mucosa-clinical-and-histopathological-findings-review-of-the-literature-and-a-case-report
#9
Anna-Maija Matela, Jaana Hagström, Hellevi Ruokonen
OBJECTIVES: Lichen sclerosus (LS) is a rare, chronic mucocutaneous disease that most frequently affects the female genital area. Oral manifestations are seldom detected; only 36 well-documented and histopathologically verified oral LS cases have been published. MATERIALS AND METHODS: Here we describe one patient affected by oral (LS) and review of the literature 1957-2017. RESULTS: Findings in our review suggest a female to male ratio of 1...
April 16, 2018: Acta Odontologica Scandinavica
https://www.readbyqxmd.com/read/29625486/structure-function-analysis-in-patients-with-intermediate-age-related-macular-degeneration
#10
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/29614113/searching-for-neurodegeneration-in-multiple-sclerosis-at-clinical-onset-diagnostic-value-of-biomarkers
#11
Lenka Novakova, Markus Axelsson, Clas Malmeström, Henrik Imberg, Olle Elias, Henrik Zetterberg, Olle Nerman, Jan Lycke
BACKGROUND: Neurodegeneration occurs during the early stages of multiple sclerosis. It is an essential, devastating part of the pathophysiology. Tools for measuring the degree of neurodegeneration could improve diagnostics and patient characterization. OBJECTIVE: This study aimed to determine the diagnostic value of biomarkers of degeneration in patients with recent clinical onset of suspected multiple sclerosis, and to evaluate these biomarkers for characterizing disease course...
2018: PloS One
https://www.readbyqxmd.com/read/29582818/association-of-exudative-age-related-macular-degeneration-with-matrix-metalloproteinases-2-1306-c-t-rs243865-gene-polymorphism
#12
Rasa Liutkeviciene, Alvita Vilkeviciute, Dominyka Borisovaite, Goda Miniauskiene
Purpose: Age-related macular degeneration (AMD) is a disease of the macula that significantly affects eyesight and leads to irreversible central vision loss. Recent studies have demonstrated that angiogenesis is the most important mechanism of AMD development. It is associated with extracellular remodeling involving different proteolytic systems, among them matrix metalloproteinases (MMPs), which play an essential role in the etiopathogenesis of AMD. The main objective of the present study was to determine the relationship between exudative AMD and MMP-2 (-1306 C/T) rs243865 polymorphism...
April 2018: Indian Journal of Ophthalmology
https://www.readbyqxmd.com/read/29582545/viscoelastic-properties-of-the-posterior-eye-of-normal-subjects-patients-with-age-related-macular-degeneration-and-pigs
#13
ZhenHuan Zhang, MengXin Pan, JiaTong Cai, James D Weiland, Kinon Chen
The purpose of this study is to measure, characterize, and compare the viscoelastic properties of the posterior eye of advanced dry age-related macular degeneration (AMD) patients, age-matched normal subjects, and pigs (3 groups). Ten horizontal and ten vertical strips of the macula retina and the underneath choroid and sclera were obtained for each group, respectively. They were examined by incremental stress-relaxation cycles in body-temperature saline. Mechanical response was characterized by the quasi-linear viscoelastic model...
March 26, 2018: Journal of Biomedical Materials Research. Part A
https://www.readbyqxmd.com/read/29576617/what-do-we-know-about-the-macular-pigment-in-amd-the-past-the-present-and-the-future
#14
REVIEW
Ranganathan Arunkumar, Charles M Calvo, Christopher D Conrady, Paul S Bernstein
Carotenoids are lipophilic isoprenoid pigments with a common C40 H56 core chemical structure that are naturally synthesized by many plants, algae, bacteria, and fungi. Humans and animals cannot synthesize carotenoids de novo and must obtain them solely through dietary sources. Among the more than 750 carotenoids in nature, only lutein, zeaxanthin, meso-zeaxanthin, and their oxidative metabolites selectively accumulate in the foveal region of the retina where they are collectively referred to as the macular pigment (MP) of the macula lutea...
March 26, 2018: Eye
https://www.readbyqxmd.com/read/29567341/a-pilot-study-assessing-retinal-pathology-in-psychosis-using-optical-coherence-tomography-choroidal-and-macular-thickness
#15
Peter Joe, Meleha Ahmad, Gabriella Riley, Judith Weissman, R Theodore Smith, Dolores Malaspina
Mounting evidence supports a genetic-vascular-inflammatory etiology of schizophrenia. The retina provides an indirect assessment of inflammation and degeneration in the brain. In particular, the use of spectral domain optical coherence tomography (SD-OCT) has emerged as a powerful tool for examining single retinal nerve cell layers and the choroid, the vascular layer supplying the outer retina. In this study, choroidal and macular thicknesses were measured in six patients with psychosis with either schizophrenia or bipolar disorder, and in 18 age- and sex-matched healthy controls...
March 6, 2018: Psychiatry Research
https://www.readbyqxmd.com/read/29564864/automatic-diagnosis-of-abnormal-macula-in-retinal-optical-coherence-tomography-images-using-wavelet-based-convolutional-neural-network-features-and-random-forests-classifier
#16
Reza Rasti, Alireza Mehridehnavi, Hossein Rabbani, Fedra Hajizadeh
The present research intends to propose a fully automatic algorithm for the classification of three-dimensional (3-D) optical coherence tomography (OCT) scans of patients suffering from abnormal macula from normal candidates. The method proposed does not require any denoising, segmentation, retinal alignment processes to assess the intraretinal layers, as well as abnormalities or lesion structures. To classify abnormal cases from the control group, a two-stage scheme was utilized, which consists of automatic subsystems for adaptive feature learning and diagnostic scoring...
March 2018: Journal of Biomedical Optics
https://www.readbyqxmd.com/read/29561503/polarization-variability-in-age-related-macular-degeneration
#17
Dean A VanNasdale, Ann E Elsner, Victor E Malinovsky, Todd D Peabody, Kimberly D Kohne, Bryan P Haggerty, Christopher A Clark
SIGNIFICANCE: Age-related macular degeneration (AMD) is a leading cause of irreversible vision loss. Complementary imaging techniques can be used to better characterize and quantify pathological changes associated with AMD. By assessing specific light-tissue interactions, polarization-sensitive imaging can be used to detect tissue disruption early in the disease process. PURPOSE: The aim of this study was to compare variability in central macular polarization properties in patients with nonexudative AMD and age-matched control subjects...
March 21, 2018: Optometry and Vision Science: Official Publication of the American Academy of Optometry
https://www.readbyqxmd.com/read/29554078/comparison-of-retinal-pathology-visualization-in-multispectral-scanning-laser-imaging
#18
Amit Meshi, Tiezhu Lin, Kunny Dans, Kevin C Chen, Manuel Amador, Kyle Hasenstab, Ilkay Kilic Muftuoglu, Eric Nudleman, Daniel Chao, Dirk-Uwe Bartsch, William R Freeman
PURPOSE: To compare retinal pathology visualization in multispectral scanning laser ophthalmoscope imaging between the Spectralis and Optos devices. METHODS: This retrospective cross-sectional study included 42 eyes from 30 patients with age-related macular degeneration (19 eyes), diabetic retinopathy (10 eyes), and epiretinal membrane (13 eyes). All patients underwent retinal imaging with a color fundus camera (broad-spectrum white light), the Spectralis HRA-2 system (3-color monochromatic lasers), and the Optos P200 system (2-color monochromatic lasers)...
March 16, 2018: Retina
https://www.readbyqxmd.com/read/29503524/visual-acuity-loss-associated-with-excessive-dry-macula-in-exudative-age-related-macular-degeneration
#19
Hidenori Takahashi, Yuji Inoue, Xue Tan, Satoru Inoda, Shinichi Sakamoto, Yusuke Arai, Yasuo Yanagi, Yujiro Fujino, Hidetoshi Kawashima
Purpose: To investigate the correlation between visual acuity and central macular thickness (CMT) and choroidal thickness (CCT) in patients with wet age-related macular degeneration (AMD). Methods: In this retrospective analysis, 14 eyes that received >10 ranibizumab injections (based on pro re nata [PRN] regimen) and maintained initial visual acuity gain were analyzed. The following 5 parameters were measured at the foveal center: CMT (distance from the inner limiting membrane [ILM] to Bruch's membrane); central retinal thickness (CRT; distance from the ILM to the inner limit of the retinal pigment epithelium or subretinal fluid [SRF]); SRF thickness (SRFT); pigment epithelium detachment thickness (PEDT); and CCT...
2018: Clinical Ophthalmology
https://www.readbyqxmd.com/read/29501627/orthostatic-hypertension-as-a-risk-factor-for-age-related-macular-degeneration-evidence-from-the-irish-longitudinal-study-on-ageing
#20
Bláithín Ní Bhuachalla, Christine A McGarrigle, Neil O'Leary, Kwadwo Owusu Akuffo, Tunde Peto, Stephen Beatty, Rose Anne Kenny
PURPOSE: Age related macular degeneration (AMD) is a leading cause of irreversible visual loss in developed countries. It is associated with vascular risk factors including hypertension. Dysregulated blood pressure (BP) behaviour including orthostatic hypertension (OHTN), hypotension (OH) and BP variability (BPV) are associated with end-organ damage, particularly in the brain. We investigated if abnormal orthostatic BP (OBP) was a risk factor for AMD, for which a vascular aetiology is implicated...
June 2018: Experimental Gerontology
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