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retinal necrosis

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https://www.readbyqxmd.com/read/29022962/retinal-necrosis-as-the-initial-presentation-of-primary-intraocular-lymphoma
#1
Parthopratim Dutta Majumder, Nirupama Raghothaman, Ranju Kharel, Nitin Kumar, Vikas Khetan
A 72 years old female presented with bilateral painless progressive loss of vision over one year. She was diagnosed as non-resolving bilateral panuveitis. Her visual acuity in right eye was hand movement close to face and left eye was perception of light with inaccurate projection of rays. Bilateral anterior chamber had 1+ cells and flares. Vitreous cells had 1+ cells and haze in right eye but the left eye had 3+ vitreous cells and haze. Right eye fundus had multiple, discrete sub retinal yellowish deposits with subretinal haemorrhage and macular edema with perivascular infiltrates...
January 2017: Nepalese Journal of Ophthalmology
https://www.readbyqxmd.com/read/29020238/acute-retinal-necrosis-caused-by-the-zoster-vaccine-virus
#2
Gregory Heath, Daniel P Depledge, Julianne R Brown, Anthony D Hale, Helena Tutil, Rachel Williams, Judith Breuer
We report acute retinal necrosis caused by the vOka vaccine strain following immunisation of a 78 year old women with live zoster vaccine. Whole genome sequencing confirmed the ocular vOka strain to be derived from the vaccine and excluded the presence of new mutations or recombination with wild type VZV.
August 2, 2017: Clinical Infectious Diseases: An Official Publication of the Infectious Diseases Society of America
https://www.readbyqxmd.com/read/29018243/6e11-a-highly-selective-inhibitor-of-receptor-interacting-protein-kinase-1-protects-cells-against-cold-hypoxia-reoxygenation-injury
#3
C Delehouzé, S Leverrier-Penna, F Le Cann, A Comte, M Jacquard-Fevai, O Delalande, N Desban, B Baratte, I Gallais, F Faurez, M C Bonnet, M Hauteville, P G Goekjian, R Thuillier, F Favreau, P Vandenabeele, T Hauet, M T Dimanche-Boitrel, S Bach
Necroptosis is a programmed cell death pathway that has been shown to be of central pathophysiological relevance in multiple disorders (hepatitis, brain and cardiac ischemia, pancreatitis, viral infection and inflammatory diseases). Necroptosis is driven by two serine threonine kinases, RIPK1 (Receptor Interacting Protein Kinase 1) and RIPK3, and a pseudo-kinase MLKL (Mixed Lineage Kinase domain-Like) associated in a multi-protein complex called necrosome. In order to find new inhibitors for use in human therapy, a chemical library containing highly diverse chemical structures was screened using a cell-based assay...
October 10, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28985573/antibody-based-immunotherapy-of-aciclovir-resistant-ocular-herpes-simplex-virus-infections
#4
Dirk Bauer, Jessica Keller, Mira Alt, Axel Schubert, Ulrich Wilhelm Aufderhorst, Vivien Palapys, Maren Kasper, Christiane Silke Heilingloh, Ulf Dittmer, Björn Laffer, Anna Maria Eis-Hübinger, Georges M Verjans, Arnd Heiligenhaus, Michael Roggendorf, Adalbert Krawczyk
The increasing incidence of aciclovir- (ACV) resistant strains in patients with ocular herpes simplex virus (HSV) infections is a major health problem in industrialized countries. In the present study, the humanized monoclonal antibody (mAb) hu2c targeting the HSV-1/2 glycoprotein B was examined for its efficacy towards ACV-resistant infections of the eye in the mouse model of acute retinal necrosis (ARN). BALB/c mice were infected by microinjection of an ACV-resistant clinical isolate into the anterior eye chamber to induce ARN and systemically treated with mAb hu2c at 24h prior (pre-exposure prophylaxis) or at 24, 40, and 56h after infection (post-exposure immunotherapy)...
October 3, 2017: Virology
https://www.readbyqxmd.com/read/28981598/mixed-lineage-kinase-domain-like-protein-induces-rgc-5-necroptosis-following-elevated-hydrostatic-pressure
#5
Lvshuang Liao, Lei Shang, Na Li, Shuchao Wang, Mi Wang, Yanxia Huang, Dan Chen, Jufang Huang, Kun Xiong
Receptor-interacting protein 3 (RIP3) is an essential component of the necroptosis signaling pathway. Phosphorylation of its downstream target, mixed lineage kinase domain-like protein (MLKL), has been proposed to induce necroptosis by initiating Ca2+ influx. Our previous studies have shown that RGC-5 retinal ganglion cells undergo RIP3-mediated necroptosis following elevated hydrostatic pressure (EHP). However, the molecular mechanism underlying necroptosis induction downstream of RIP3 is still not well understood...
October 1, 2017: Acta Biochimica et Biophysica Sinica
https://www.readbyqxmd.com/read/28971251/rabbit-model-of-ocular-indirect-photodynamic-therapy-using-a-retinoblastoma-xenograft
#6
Jonathan W Kim, Bradley Jacobsen, Emily Zolfaghari, Angela Ferrario, Patricia Chevez-Barrios, Jesse L Berry, Diana K Lee, Grecia Rico, Ingy Madi, Narsing Rao, Kevin Stachelek, Lei-Chi Wang, Charles Gomer
PURPOSE: The goal of this project was to demonstrate the feasibility of coupling the indirect ophthalmoscope laser delivery system with the 690 nm wavelength diode laser used to perform photodynamic therapy (PDT) in the treatment of retinoblastoma. METHODS: For phase 1, a total of six pigmented rabbits were treated with the indirect laser delivery system. The laser source was provided by the Lumenis Opal 690 nm laser unit, delivered through a 810 nm Indirect ophthalmoscope headpiece and a hand-held 28-diopter indirect lens (1...
October 2, 2017: Graefe's Archive for Clinical and Experimental Ophthalmology
https://www.readbyqxmd.com/read/28967076/aflibercept-in-the-management-of-acute-retinal-necrosis-syndrome-related-macular-edema
#7
Leticia Ortega-Evangelio, Javier Navarrete-Sanchis, Basil K Williams, Juan Miguel Tomás-Torrent
PURPOSE: Acute retinal necrosis (ARN) is a panuveitis syndrome that may lead to severe complications such as cystoid macular edema (CME). There is no consensus about the best treatment. We report one case of CME secondary to ARN managed with intravitreal aflibercept. CASE REPORT: A 41-year-old woman with a history of successfully treated varicella-zoster virus-associated ARN developed an epiretinal membrane (ERM) and underwent pars plana vitrectomy, ERM removal, inner limiting membrane peel, and lensectomy...
September 14, 2017: European Journal of Ophthalmology
https://www.readbyqxmd.com/read/28966629/live-cell-imaging-new-avenues-to-investigate-retinal-regeneration
#8
REVIEW
Manuela Lahne, David R Hyde
Sensing and responding to our environment requires functional neurons that act in concert. Neuronal cell loss resulting from degenerative diseases cannot be replaced in humans, causing a functional impairment to integrate and/or respond to sensory cues. In contrast, zebrafish (Danio rerio) possess an endogenous capacity to regenerate lost neurons. Here, we will focus on the processes that lead to neuronal regeneration in the zebrafish retina. Dying retinal neurons release a damage signal, tumor necrosis factor α, which induces the resident radial glia, the Müller glia, to reprogram and re-enter the cell cycle...
August 2017: Neural Regeneration Research
https://www.readbyqxmd.com/read/28960122/intraocular-detection-of-herpesviruses-by-xtag-liquid-chip-technology-in-patients-with-acute-retinal-necrosis
#9
Chan Zhao, Jie Yi, Fangtian Dong, Rongping Dai, Hanyi Min, Lin Zheng, Youxin Chen, Junjie Ye, Yupei Zhao, Naili Wang, Yingchun Xu, Meifen Zhang
PURPOSE: To evaluate the performance of the xTAG liquid chip technology (xTAG-LCT) for etiological diagnosis of acute retinal necrosis (ARN). METHODS: Fifteen vitreous and 3 aqueous samples from 18 ARN patients were analyzed by xTAG-LCT and multiplex PCR (mPCR)/quantitative PCR (qPCR). RESULTS: xTAG-LCT revealed positive results in 17 of the 18 samples: 10 for Varicella Zoster Virus (VZV) alone; 5 for VZV and Epstein-Barr virus (EBV); 1 for herpes simplex viruses type 1 (HSV-1) and EBV; 1 for VZV, HSV-1 and EBV...
September 29, 2017: Ocular Immunology and Inflammation
https://www.readbyqxmd.com/read/28939808/novel-pathogenic-mutations-in-c1qtnf5-support-a-dominant-negative-disease-mechanism-in-late-onset-retinal-degeneration
#10
Chloe M Stanton, Shyamanga Borooah, Camilla Drake, Joseph A Marsh, Susan Campbell, Alan Lennon, Dinesh C Soares, Neeru A Vallabh, Jayashree Sahni, Artur V Cideciyan, Baljean Dhillon, Veronique Vitart, Samuel G Jacobson, Alan F Wright, Caroline Hayward
Late-onset retinal degeneration (L-ORD) is a rare autosomal dominant retinal dystrophy, characterised by extensive sub-retinal pigment epithelium (RPE) deposits, RPE atrophy, choroidal neovascularisation and photoreceptor cell death associated with severe visual loss. L-ORD shows striking phenotypic similarities to age-related macular degeneration (AMD), a common and genetically complex disorder, which can lead to misdiagnosis in the early stages. To date, a single missense mutation (S163R) in the C1QTNF5 gene, encoding C1q And Tumor Necrosis Factor Related Protein 5 (C1QTNF5) has been shown to cause L-ORD in a subset of affected families...
September 22, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28932612/concomitant-intravitreal-ganciclovir-and-dexamethasone-therapy-in-the-management-of-acute-retinal-necrosis-in-a-patient-previously-treated-with-oral-famciclovir
#11
Chirag V Patel, Kamal Kishore
Several treatments have been reported for acute retinal necrosis (ARN). We report a case of treatment with intravitreal injection of ganciclovir and dexamethasone in addition to oral valacyclovir in a patient who was previously treated with oral famciclovir for ipsilateral herpes zoster ophthalmicus (HZO).
2017: Case Reports in Ophthalmological Medicine
https://www.readbyqxmd.com/read/28923648/octreotide-ameliorates-renal-ischemia-reperfusion-injury-via-antioxidation-and-anti-inflammation
#12
Z Xu, K Zhao, P Han, X Qi, W Zhang, T Niu
Oxidative stress, calcium overload, inflammation, cellular necrosis, and apoptosis are implicated in renal ischemic/reperfusion injury (RIRI). Because octreotide (OCT) is protective in retinal IRI, the effect of OCT on mouse RIRI and the mechanisms involved were investigated. The RIRI model was induced in male C57BL/6 mice, and the mice were then treated with saline or OCT. Serum and kidneys were subjected to periodic acid-Schiff staining, terminal deoxynucleotidyl transferase dUTP nick end labeling assay, enzyme-linked immunosorbent assay, western blotting, and immunohistochemistry...
October 2017: Transplantation Proceedings
https://www.readbyqxmd.com/read/28885615/necroptosis-in-microglia-contributes-to-neuroinflammation-and-retinal-degeneration-through-tlr4-activation
#13
Zijing Huang, Tian Zhou, Xiaowei Sun, Yingfeng Zheng, Bing Cheng, Mei Li, Xialin Liu, Chang He
Inflammation has emerged to be a critical mechanism responsible for neural damage and neurodegenerative diseases. Microglia, the resident innate immune cells in retina, are implicated as principal components of the immunological insult to retinal neural cells. The involvement of microglia in retinal inflammation is complex and here we propose for the first time that necroptosis in microglia triggers neuroinflammation and exacerbates retinal neural damage and degeneration. We found microglia experienced receptor-interacting protein kinase 1 (RIP1)- and RIP3-dependent necroptosis not only in the retinal degenerative rd1 mice, but also in the acute retinal neural injury mice...
September 8, 2017: Cell Death and Differentiation
https://www.readbyqxmd.com/read/28871477/-diagnostics-and-management-of-herpes-zoster-ophthalmicus
#14
R N Werner, N-I Steinhorst, A Nast, U Pleyer
Herpes zoster (HZ, shingles) represents the secondary manifestation of an infection with varicellazoster virus (VZV). A reactivation of dormant VZV in the ophthalmic branch of the fifth cranial nerve leads to ophthalmic HZ (HZO). The predominantly older and immune compromised patients often present with eye involvement (approximately 50%) as well as characteristic skin changes. Clinical manifestations include the cornea and conjunctiva but anterior uveitis and (rarely) acute retinal necrosis may also occur...
September 4, 2017: Der Ophthalmologe: Zeitschrift der Deutschen Ophthalmologischen Gesellschaft
https://www.readbyqxmd.com/read/28866026/the-peroxisome-proliferator-activated-receptor-pan-agonist-bezafibrate-suppresses-microvascular-inflammatory-responses-of-retinal-endothelial-cells-and-vascular-endothelial-growth-factor-production-in-retinal-pigmented-epithelial-cells
#15
Ayumi Usui-Ouchi, Yasuo Ouchi, Nobuyuki Ebihara
A randomized clinical trial showed the beneficial effects of the selective peroxisome proliferator-activated receptor (PPAR)-α agonist, fenofibrate, in reducing the progression of diabetic retinopathy independent of serum lipid levels. All subtypes of PPAR (PPAR-α, PPAR-γ, and PPAR-β/δ) have been reported to play a key role in microvascular inflammation and angiogenesis. Therefore, the agonistic function of fenofibrate against the PPAR-α has been suggested to contribute to its medicinal effect. Furthermore, bezafibrate is a fibrate drug commonly used as a lipid-lowering agent to treat hyperlipidemia and acts as a pan-agonist of all PPARs subtypes...
November 2017: International Immunopharmacology
https://www.readbyqxmd.com/read/28859118/tumor-parameters-predict-the-risk-of-side-effects-after-ruthenium-106-plaque-brachytherapy-of-uveal-melanomas
#16
Lisa Tarmann, Werner Wackernagel, Domagoj Ivastinovic, Mona Schneider, Peter Winkler, Gerald Langmann
BACKGROUND: To report on radiation-related side effects and complications after ruthenium-106 plaque brachytherapy of uveal melanomas. METHODS: Medical records of 143 eyes with uveal melanoma, treated by ruthenium-106 brachytherapy between 1997 and 2012 at a single center, were analyzed. We evaluated the occurrence of radiation-related side effects on the anterior and posterior segment of the eye. The influence of patient, tumor and treatment parameters on outcome was analyzed by multivariate time to event analysis considering competing risks...
2017: PloS One
https://www.readbyqxmd.com/read/28852447/naringin-attenuates-diabetic-retinopathy-by-inhibiting-inflammation-oxidative-stress-and-nf-%C3%AE%C2%BAb-activation-in-vivo-and-in-vitro
#17
Lihua Liu, Zhongfu Zuo, Sijing Lu, Aihua Liu, Xuezheng Liu
OBJECTIVES: Naringin, an essential flavonoid, inhibits inflammatory response and oxidative stress in diabetes. However, whether naringin has beneficial effects on diabetic retinopathy (DR) remains unknown. MATERIALS AND METHODS: Streptozotocin (STZ, 65 mg/kg) was intraperitoneally injected into male rats (8 weeks old weighting 200-250 g) to establish diabetic model, then naringin (20, 40 or 80 mg/kg/day) was intraperitoneally injected into the diabetic rats for twelve weeks...
July 2017: Iranian Journal of Basic Medical Sciences
https://www.readbyqxmd.com/read/28843858/tlr7-deficiency-contributes-to-attenuated-diabetic-retinopathy-via-inhibition-of-inflammatory-response
#18
Yun-Ru Liao, Zi-Jing Li, Peng Zeng, Yu-Qing Lan
Diabetic retinopathy (DR) is a major microvascular complication of diabetes, resulting in neuronal dysfunction, retinal vascular leakage, and apoptosis within the retina. Innate immunity plays an important role in the pathogenesis of type 2 diabetes (T2D) and related complications. The toll-like receptors (TLRs), central to innate immunity, are essential participants in the progression and pathogenesis of the disease and its complications. In the study, streptozotocin (STZ) was combined with whole-body hypoxia for quicker induction of early-stage diabetic retinopathy (DR) in the wild type (WT) and TLR7-knockout (KO) C57BL/6 mice...
November 18, 2017: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/28842607/retinal-cell-death-dependent-reactive-proliferative-gliosis-in-the-mouse-retina
#19
Sheik Pran Babu Sardar Pasha, Robert Münch, Patrick Schäfer, Peter Oertel, Alex M Sykes, Yiqing Zhu, Mike O Karl
Neurodegeneration is a common starting point of reactive gliosis, which may have beneficial and detrimental consequences. It remains incompletely understood how distinctive pathologies and cell death processes differentially regulate glial responses. Müller glia (MG) in the retina are a prime model: Neurons are regenerated in some species, but in mammals there may be proliferative disorders and scarring. Here, we investigated the relationship between retinal damage and MG proliferation, which are both induced in a reproducible and temporal order in organotypic culture of EGF-treated mouse retina: Hypothermia pretreatment during eye dissection reduced neuronal cell death and MG proliferation; stab wounds increased both...
August 25, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28815057/giant-retinal-tear-after-intra-arterial-chemotherapy-for-advanced-unilateral-retinoblastoma
#20
Camila V Ventura, Audina M Berrocal, Jennifer Thomson, Fiona J Ehlies, Azeema Latiff, Timothy G Murray
BACKGROUND: Retinoblastoma is considered the most common intraocular malignancy in childhood, comprising 4% of all pediatric cancers. Management of retinoblastoma has evolved over the past two decades and intra-ophthalmic artery chemotherapy has emerged as a new modality of globe-conserving treatment with excellent results. This treatment achieves effective tumor reduction by delivering localized chemotherapy, decreases enucleation rate, and minimizes systemic and local side effects. CASE PRESENTATION: We report the case of an 8-year-old girl with a late presentation of an advanced unilateral retinoblastoma associated to diffuse exudative retinal detachment in the right eye, classified as group E by the International Classification of Retinoblastoma...
2017: International Journal of Retina and Vitreous
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