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https://www.readbyqxmd.com/read/28743128/anti-vascular-endothelial-growth-factors-protect-retinal-pigment-epithelium-cells-against-oxidation-by-modulating-nitric-oxide-release-and-autophagy
#1
Stefano De Cillà, Serena Farruggio, Stela Vujosevic, Giulia Raina, Davide Filippini, Valentina Gatti, Nausicaa Clemente, David Mary, Diego Vezzola, Giamberto Casini, Luca Rossetti, Elena Grossini
BACKGROUND/AIMS: the anti-vascular endothelial growth factors (VEGF), Aflibercept and Ranibizumab, are used for the treatment of macular degeneration. Here we examined the involvement of nitric oxide (NO), mitochondria function and of apoptosis/autophagy in their antioxidant effects in human retinal pigment epithelium cells (RPE). METHODS: RPE were exposed to Ranibizumab/Aflibercept in the absence or presence of NO synthase (NOS) inhibitor and of autophagy activator/blocker, rapamicyn/3-methyladenine...
July 25, 2017: Cellular Physiology and Biochemistry
https://www.readbyqxmd.com/read/28742462/a-novel-iris-transillumination-grading-scale-allowing-flexible-assessment-with-quantitative-image-analysis-and-visual-matching
#2
Chen Wang, Flavia Brancusi, Zaheer M Valivullah, Michael G Anderson, Denise Cunningham, Adam Hedberg-Buenz, Bradley Power, Dimitre Simeonov, William A Gahl, Wadih M Zein, David R Adams, Brian Brooks
PURPOSE: To develop a sensitive scale of iris transillumination suitable for clinical and research use, with the capability of either quantitative analysis or visual matching of images. METHODS: Iris transillumination photographic images were used from 70 study subjects with ocular or oculocutaneous albinism. Subjects represented a broad range of ocular pigmentation. A subset of images was subjected to image analysis and ranking by both expert and nonexpert reviewers...
July 25, 2017: Ophthalmic Genetics
https://www.readbyqxmd.com/read/28741994/perlucidibaca-aquatica-sp-nov-isolated-from-fresh-water
#3
Kiwoon Baek, Ji-Hye Han, Mi-Hwa Lee
A Gram-staining-negative, non-motile, non-pigmented, strictly aerobic and rod-shape bacterium, designated BK296T, was isolated from stream water originating from a limestone cave in Samcheok, Korea. Optimal growth of strain BK296T was observed at 30 °C, pH 7.0-8.0 and without NaCl. Phylogenetic analysis based on 16S rRNA gene sequences showed that strain BK296T belonged to the genus Perlucidibaca, forming a robust clade with a member of the genus, and was most closely related to Perlucidibaca piscinae (97...
July 21, 2017: International Journal of Systematic and Evolutionary Microbiology
https://www.readbyqxmd.com/read/28741457/anthocyanins-possible-role-as-multitarget-therapeutic-agents-for-prevention-and-therapy-of-chronic-diseases
#4
Swathi Putta, Nagendra Sastry Yarla, Ilaria Peluso, Dinesh Kumar Tiwari, Gorla V Reddy, Priyanka Voori Giri, Naresh Kumar, Ramarao Malla, Veera Brahma Chari, Rama Sekhara Reddy D, Ramesh Bade, Mastan Mannarapu, George Barretto, Da-Yong Lu, Vadim V Tarasov, Vladimir N Chubarev, Frederico Fávaro Ribeiro, Luciana Scotti, Marcus T Scotti, M A Kamal, Gjumrakch Aliev, Chinthalapally V Rao, George Perry, Anupam Bishayee
Anthocyanins belong to the flavonoids class of polyphenols and they are water soluble dark colored natural pigments from fruits and vegetables. Dietary consumption of anthocyanins is high compared to other flavonoids, owing to their wide distribution in plant materials. Anthocyanins are the active component in several herbal folk medicines due to its multifaceted medicinal properties. METHOD: This review discusses the anthocyanins as multitarget drugs, which posses antioxidant, antidiabetic, antihyperlipidemic, anti inflammatory, anticarcinogenic, antiulcer, cardioprotective, hepatoprotective, neuroprotective role...
May 19, 2017: Current Pharmaceutical Design
https://www.readbyqxmd.com/read/28741329/-localized-pigmented-vellonodular-sunovitis-cause-of-knee-hemarthrosis
#5
F J Martínez-Ruiz, A Salaverry-Walls, M Bautista-Morales, C Rivera-Reyes, J G Montero-García
The pigmented vellonodular sinovitis (PVNS) is benign neoplasm with synovial proliferation and hemosiderin deposit, characterized by large compromising joints, especially the knee. At present, two variants of clinics, the diffuse form (PVNSD) and the localized (PVNSL) are described. Arthroscopic synovectomy and radiosynoviorthesis (RSO) is the treatment that has shown the best functional results. Nuclear magnetic resonance is an appropriate method for conducting the diagnosis of PVNSL.
January 2017: Acta Ortopédica Mexicana
https://www.readbyqxmd.com/read/28741056/chlorophyll-a-with-a-farnesyl-tail-in-thermophilic-cyanobacteria
#6
Jessica M Wiwczar, Amy M LaFountain, Jimin Wang, Harry A Frank, Gary W Brudvig
Photosystem II (PSII) of oxygenic photosynthetic organisms normally contains exclusively chlorophyll a (Chl a) as its major light-harvesting pigment. Chl a canonically consists of the chlorin headgroup with a 20-carbon, 4-isoprene unit, phytyl tail. We have examined the 1.9 Å crystal structure of PSII from thermophilic cyanobacteria reported by Shen and coworkers in 2012 (PDB accession of 3ARC/3WU2). A newly refined electron density map from this structure, presented here, reveals that some assignments of the cofactors may be different from those modeled in the 3ARC/3WU2 structure, including a specific Chl a that appears to have a truncated tail by one isoprene unit...
July 24, 2017: Photosynthesis Research
https://www.readbyqxmd.com/read/28740757/using-electroretinograms-and-multi-model-inference-to-identify-spectral-classes-of-photoreceptors-and-relative-opsin-expression-levels
#7
Nicolas Lessios
Understanding how individual photoreceptor cells factor in the spectral sensitivity of a visual system is essential to explain how they contribute to the visual ecology of the animal in question. Existing methods that model the absorption of visual pigments use templates which correspond closely to data from thin cross-sections of photoreceptor cells. However, few modeling approaches use a single framework to incorporate physical parameters of real photoreceptors, which can be fused, and can form vertical tiers...
2017: PeerJ
https://www.readbyqxmd.com/read/28739615/primary-bilateral-adrenal-nodular-disease-with-cushing-s-syndrome-varying-aetiology
#8
Kush Dev Singh Jarial, Rama Walia, Uma Nahar, Anil Bhansali
Primary adrenal disorders contribute 20%â€"30% of patients with endogenous Cushing's syndrome. Most of the primary adrenal diseases are unilateral and include adenoma and adrenocortical carcinoma, whereas bilateral adrenal lesions are uncommon and include primary pigmented nodular adrenocortical disease, primary bilateral macronodular adrenocortical hyperplasia, isolated micronodular adrenocortical disease, bilateral adenomas or carcinomas, and rarely pituitary adrenocorticotropic hormone-dependent adrenal nodular disease...
July 24, 2017: BMJ Case Reports
https://www.readbyqxmd.com/read/28739598/sequence-based-mapping-and-genome-editing-reveal-mutations-in-stickleback-hps5-cause-oculocutaneous-albinism-and-the-casper-phenotype
#9
Craig T Miller, James C Hart
Here we present and characterize the spontaneous X-linked recessive mutation casper, which causes oculocutaneous albinism in threespine sticklebacks (Gasterosteus aculeatus). In humans, Hermansky-Pudlak syndrome results in pigmentation defects due to disrupted formation of the melanin-containing lysosomal-related organelle (LRO), the melanosome. casper mutants display not only reduced pigmentation of melanosomes in melanophores, but also reductions in the iridescent silver color from iridophores, while the yellow pigmentation from xanthophores appears unaffected...
July 24, 2017: G3: Genes—Genomes—Genetics
https://www.readbyqxmd.com/read/28739342/a-pro-inflammatory-function-of-toll-like-receptor-2-in-the-retinal-pigment-epithelium-as-a-novel-target-for-reducing-choroidal-neovascularization-in-age-related-macular-degeneration
#10
Lili Feng, Meihua Ju, Kei Ying Vivian Lee, Ashley Mackey, Mariasilvia Evangelista, Daiju Iwata, Peter Adamson, Kameran Lashkari, Richard Foxton, David Shima, Yin Shan Ng
Current treatments for choroidal neovascularization, a major cause of blindness for patients with age-related macular degeneration, treat symptoms but not the underlying causes of the disease. Inflammation has been strongly implicated in the pathogenesis of choroidal neovascularization. We examined the inflammatory role of toll-like receptor 2 (TLR2) in age-related macular degeneration. TLR2 was robustly expressed by the retinal pigment epithelium in mouse and human eyes, both normal and with macular degeneration/choroidal neovascularization...
July 21, 2017: American Journal of Pathology
https://www.readbyqxmd.com/read/28739193/intraocular-metastasis-comparison-of-clinical-presentation-with-a-known-and-unknown-primary-tumour
#11
R Ramoa, M A Saornil, C García-Alvarez, P Diezhandino, P Alonso-Martínez, E García-Lagarto, M F Muñoz-Moreno, F Lopez-Lara
OBJECTIVE: The purpose of the present study is to review the frequency of intraocular metastases as first presentation of systemic disease, and to identify clinical and tumour characteristics. METHODS: Retrospective study of consecutive cases diagnosed of intraocular metástasis at a referral intraocular tumours unit between 1993 and 2014. General, epidemiological and ophthalmological characteristics were recorded. RESULTS: A total of 21 patients, with a mean age 62...
July 21, 2017: Archivos de la Sociedad Española de Oftalmología
https://www.readbyqxmd.com/read/28738142/metabolomics-reveals-cu-oh-2-nanopesticide-activated-antioxidative-pathways-and-decreased-beneficial-antioxidants-in-spinach-leaves
#12
Lijuan Zhao, Yuxiong Huang, Adeyemi S Adeleye, Arturo A Keller
While the use of nanopesticides in modern agriculture continues to increase, their effects on crop plants are still poorly understood. Here, 4-week-old spinach plants grown in an artificial medium were exposed via foliar spray to Cu(OH)2 nanopesticide (0.18 and 18 mg/plant) or Cu ions (0.15 and 15 mg/plant) for 7 days. A gas chromatography-time of flight-mass spectrometry metabolomics approach was applied to assess metabolic alterations induced by Cu(OH)2 nanopesticide in spinach leaves. Exposure to Cu(OH)2 nanopesticide and copper ions induced alterations in the metabolite profiles of spinach leaves...
July 24, 2017: Environmental Science & Technology
https://www.readbyqxmd.com/read/28737158/gastric-lesions-in-dolphins-stranded-along-the-eastern-adriatic-coast
#13
Jerko Hrabar, Ivana Bočina, Andrea Gudan Kurilj, Martina Đuras, Ivona Mladineo
Stranded cetaceans are often found with gastric lesions associated with the presence of parasites; most frequently, nematodes of the genus Anisakis and the heterophyd digenean trematode Pholeter gastrophilus. In this study, we present histopathology mainly (but not exclusively) related to these 2 parasite species. Macroscopically, lesions associated with the presence of Anisakis spp. were characterised by the presence of ulcers within the gastric mucosa, while the digenean P. gastrophilus was found within large submucosal fibrotic nodules in the gastric wall...
July 24, 2017: Diseases of Aquatic Organisms
https://www.readbyqxmd.com/read/28736794/tinea-capitis-by-microsporum-audouinii-case-reports-and-review-of-published-global-literature-2000-2016
#14
Fábio Brito-Santos, Maria Helena Galdino Figueiredo-Carvalho, Rowena Alves Coelho, Anna Sales, Rodrigo Almeida-Paes
Tinea capitis caused by Microsporum audouinii is reported herein from two Brazilian schoolchildren, which are brothers. Arthroconidia were evidenced on direct examination of scalp hair, and a fungus of the genus Microsporum was isolated from cultures of each patient. The isolated fungi were classified as M. audouinii by visualization of species-specific structures, including: pectinate hyphae, chlamydospores, and fusiform macroconidia, sterile growth with characteristic brown pigment in rice grains, and through DNA sequencing of the internal transcriber spacer region...
July 24, 2017: Mycopathologia
https://www.readbyqxmd.com/read/28736676/label-free-photoacoustic-imaging-of-the-cardio-cerebrovascular-development-in-the-embryonic-zebrafish
#15
Qian Chen, Tian Jin, Weizhi Qi, Xianming Mo, Lei Xi
Zebrafish play an important role in biology, pharmacology, toxicology, and medicine. The cardio-cerebrovascular development of zebrafish is particularly critical to understand both brain disorders and cardiovascular diseases in human. In this paper, we applied optical resolution photoacoustic microscopy (ORPAM) to image the whole-body vasculature of the embryonic zebrafish with a special focus on the development of the cardio-cerebrovascular system. Using the intrinsic optical absorption contrast of the embryo, we successfully visualized the formation of the cardio-cerebrovascular network in high-resolution using a 10 × objective, and monitored the whole-body vascular development using a 4 × objective...
April 1, 2017: Biomedical Optics Express
https://www.readbyqxmd.com/read/28735646/hyperhomocysteinemia-and-age-related-macular-degeneration-role-of-inflammatory-mediators-and-pyroptosis-a-proposal
#16
Mahavir Singh, Suresh C Tyagi
Age-related macular degeneration (AMD) and pyroptosis cause irreversible vascular changes in the eyes leading to central vision loss in patients. It is the most common eye disease affecting millions of people aged 50years or older, and is slowly becoming a major health problem worldwide. The disease mainly affects macula lutea, an oval-shaped pigmented area surrounding fovea near the center of retina, a region responsible for visual acuity. It is fairly a complex disease as genetics of patients, environmental triggers as well as risk factors such as age, family history of CVDs, diabetes, gender, obesity, race, hyperopia, iris color, smoking, diabetes, exposure to sun light and pyroptosis have all been clubbed together as probable causes of macular degeneration...
August 2017: Medical Hypotheses
https://www.readbyqxmd.com/read/28735239/effects-of-a-glyphosate-based-herbicide-in-pejerrey-odontesthes-humensis-embryonic-development
#17
Yuri Dornelles Zebral, Patrícia Gomes Costa, Bruna de Castro Knopp, Luize Real Lansini, Bruna Zafalon-Silva, Adalto Bianchini, Ricardo Berteaux Robaldo
Glyphosate-based herbicides (GBH) are the major pesticides used worldwide. Among them, the Roundup formulations are the most popular. Some aspects of GBH toxicity are well known, such as induction of oxidative stress. However, embryotoxicity is scarcely known. Therefore, the aim of the present study was to evaluate the effect of exposure to different Roundup Transorb R concentrations (0.36, 1.80, 3.62 and 5.43 mg glyphosate a.e./L) on Odontesthes humensis embryonic development. Embryos were sampled at three exposure times (48, 72 and 96 h)...
July 17, 2017: Chemosphere
https://www.readbyqxmd.com/read/28734946/impaired-rhodopsin-generation-in-the-rat-model-of-diabetic-retinopathy
#18
Volha V Malechka, Gennadiy Moiseyev, Yusuke Takahashi, Younghwa Shin, Jian-Xing Ma
Diabetic retinopathy is a common complication of diabetes mellitus. Diabetic patients experience functional deficits in dark adaptation, contrast sensitivity, and color perception before microvascular pathologies become apparent. Here, we evaluated early changes in neural retinal function and in retinoid metabolism in the eye in diabetes. Streptozotocin-induced diabetic rats showed decreased a-wave and b-wave amplitudes of scotopic and photopic electroretinography responses four months after diabetes induction compared to nondiabetic controls...
July 19, 2017: American Journal of Pathology
https://www.readbyqxmd.com/read/28734811/treatment-na%C3%A3-ve-quiescent-choroidal-neovascularization-in-geographic-atrophy-secondary-to-non-exudative-age-related-macular-degeneration
#19
Vittorio Capuano, Alexandra Miere, Lea Querques, Riccardo Sacconi, Adriano Carnevali, Francesca Amoroso, Francesco Bandello, Eric H Souied, Giuseppe Querques
PURPOSE: To describe the characteristics and natural history of quiescent choroidal neovascularization (CNV) in geographic atrophy (GA) secondary to non-exudative age-related macular degeneration (AMD) through multimodal imaging. DESIGN: Retrospective observational case series. METHODS: Patients diagnosed with quiescent CNV were analyzed in two high-volume referral centers. Imaging features obtained using fluorescein angiography (FA), indocyanine green angiography (ICGA), structural optical-coherence-tomography (OCT), and OCT-Angiography (OCT-A) were noted at first presentation and during the study period...
July 19, 2017: American Journal of Ophthalmology
https://www.readbyqxmd.com/read/28734810/retinal-pigment-epithelium-humps-in-high-myopia
#20
Alessandro Marchese, Adriano Carnevali, Riccardo Sacconi, Teresa Centoducati, Lea Querques, Francesco Bandello, Giuseppe Querques
PURPOSE: To report on the presence of retinal pigment epithelium (RPE) humps in high myopia, and to describe the distinctive features from pathological PEDs and choroidal neovascularizations (CNVs). DESIGN: Retrospective cross-sectional study. METHODS: Charts and imaging studies of highly myopic patients presenting between September 2015 and February 2017 at a university teaching hospital were consecutively reviewed. All patients underwent spectral domain optical coherence tomography (OCT)...
July 19, 2017: American Journal of Ophthalmology
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