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retinal necrosis

Xiaolei Tang, Yan Dai, Xiaoli Wang, Jian Zeng, Guirong Li
The present study aimed to investigate whether microRNA-27a (miRNA27a) is associated with the pathogenesis of diabetic retinopathy, and to elucidate the underlying molecular mechanism of any potential association. In retinal pigment epithelial (RPE) cells treated with high glucose, miRNA27a expression, determined by reverse transcription-quantitative polymerase chain reaction analysis, was decreased. Caspase-3/9 activity and B-cell lymphoma 2-associated X (Bax) protein expression was increased in RPE cells subjected to high glucose...
July 2018: Experimental and Therapeutic Medicine
Binoy Appukuttan, Liam M Ashander, Yuefang Ma, Justine R Smith
Background: Human retinal endothelial cells are employed increasingly for investigations of retinal vascular diseases. Analysis of gene expression response to disease-associated stimuli by reverse transcription-quantitative real-time polymerase chain reaction (RT-qPCR) is common. However, most reported work does not follow the minimum information for publication of qPCR experiments (MIQE) recommendation that multiple, stably expressed reference genes be used for normalization. Methods: Two human retinal endothelial cell lines were treated with medium alone or containing stimuli that included: glucose at supraphysiological concentration, dimethyloxalyl-glycine, vascular endothelial growth factor, tumor necrosis factor-α, lipopolysaccharide and Toxoplasma gondii tachyzoites...
March 2018: Gene Reports
Yucel Karakurt, Turgay Ucak, Gamze Tasli, Ibrahim Ahiskali, Sare Şipal, Nezahat Kurt, Halis Süleyman
AIM: Lutein is one of the most common carotenoids defined in human plasma as having potent anti-oxidant effects. We aimed to determine the biochemical and histopathological effects of lutein on cisplatin induced oxidative retinal injury in rats. MATERIAL AND METHOD: Twenty-four rats were equally divided into four groups as healthy controls (HC group), only cisplatin (5 mg/kg) administered group (CIS group), Lutein (0.5 mg/kg) + cisplatin (5 mg/kg) administered group (LC group), and only Lutein (0...
June 4, 2018: Cutaneous and Ocular Toxicology
Y Sun, Y-X Liu
OBJECTIVE: To explore the mechanism of HOTTIP in diabetic retinopathy. MATERIALS AND METHODS: The diabetic rat model was established by a single intraperitoneal injection of streptozocin (STZ). The expression of HOTTIP in the retina of diabetic mice and wild-type mice was detected by reverse transcriptase-polymerase chain reaction (RT-PCR). The wild-type and diabetic rats were injected with HOTTIP shRNA or Scr shRNA adenovirus, and the down-regulated expression of HOTTIP was accessed by RT-PCR...
May 2018: European Review for Medical and Pharmacological Sciences
Jian Wang, Wei Zhang, Guang-Hui He, Bin Wu, Song Chen
AIM: To investigate the effect of the overexpression of C-X-C chemokine receptor type 4 (CXCR4) on homing of mesenchymal stem cells (MSCs) in vitro and therapeutic effects of diabetic retinopathy (DR) in vivo . METHODS: MSCs were infected by lentivirus constructed with CXCR4. The expression of CXCR4 was examined by immunofluorescence, Western blot, and quantitative polymerase chain reaction. CXCR4-overexpressing MSCs were cultured in vitro to evaluate their chemotaxis, migration, and apoptotic activities...
2018: International Journal of Ophthalmology
Lin Fu, Frederic K Fung, Amy Cheuk-Yin Lo, Yau-Kei Chan, Kwok-Fai So, Ian Yat-Hin Wong, Kendrick Co Shih, Jimmy Shiu-Ming Lai
Purpose: To investigate the effect of transcorneal electrical stimulation (TcES) on retinal ganglion cell (RGC) function and survival after acute ocular hypertension-related retinal injury in gerbil eyes. Methods: Gerbil eyes were subjected to acute ocular hypertensive injury (80 mm Hg for 60 minutes). In the treatment group, TcES was applied to the surgical eye immediately and then twice weekly for a total of 1 month. In the control group, sham TcES was given to the surgical eye at the same time points...
May 2018: Translational Vision Science & Technology
S Altan Ozal, Kader Turkekul, Vuslat Gurlu, Hande Guclu, Suat Erdogan
PURPOSE: Age-related macular degeneration (AMD) is the most common cause of visual loss. The dry AMD is characterized by retinal pigment epithelium (RPE) death and changes in AMD lead to severe loss of vision. Coumarin derived esculetin has a number of therapeutic and pharmacological effects such as anti-inflammatory and antioxidant with various mechanisms. The purpose of this study was to investigate the effects of esculetin treatment on lipopolysaccharide (LPS) - induced inflammation, oxidative stress and cell survival...
May 26, 2018: Current Eye Research
Xiaoqin Lei, Yunyun Zhou, Cuicui Ren, Xi Chen, Rongguo Shang, Jianyu He, Jianwei Dou
ETHNOPHARMACOLOGICAL RELEVANCE: According to ancient traditional Chinese medicine, Typhae Pollen (TP) is commonly used to treat fundus haemorrhage because it improves blood circulation. AIMS OF THE STUDY: This study evaluated the role of the main TP component, polysaccharides (TPP), on diabetic retinopathy (DR) and its possible mechanisms of inhibiting inflammation and improving blood circulation. MATERIALS AND METHODS: After successful establishment of a diabetic rat model, TPP was administered to diabetic rats for treatment, and the rats were sacrificed at 12 weeks...
May 23, 2018: Journal of Ethnopharmacology
Mohanraj Manangeeswaran, Jennifer L Kielczewski, H Nida Sen, Biying C Xu, Derek D C Ireland, Ian L McWilliams, Chi-Chao Chan, Rachel R Caspi, Daniela Verthelyi
Zika-infected patients can have eye involvement ranging from mild conjunctivitis to severe chorioretinal lesions, however the possible long-term sequelae of infection and timeline to recovery remain unknown. Here we describe the partial recovery of chorioretinal lesions in an immunocompetent patient diagnosed with bilateral posterior uveitis associated with Zika infection and show that some lesions resolved with focal atrophy evident as pigmentary changes on funduscopy. To better understand the progression of the lesions and correlate the changes in fundus imaging with local viral load, immune responses, and retinal damage, we developed a symptomatic mouse model of ocular Zika virus infection...
May 25, 2018: Emerging Microbes & Infections
Omar Alsinaidi, Aasef G Shaikh
The authors describe diffusion-weighted magnetic resonance imaging (DWI) as an accessible way to screen for acute retinal pathology in emergency setting. They describe three proof-of-principle patients who had abrupt onset of vision loss from acute retinal pathology where DWI was diagnostic. The deficits included central retinal artery occlusion and acute retinitis with retinal necrosis. DWI can be non-specific for aetiology, but it can rapidly localise the retinal pathology and initiate early therapeutic interventions in the emergency room...
June 2018: Neuro-ophthalmology
S Bala Murugan, Girish Bharat Velis, Manavi D Sindal
Bilateral uveal effusion syndrome associated with bilateral acute retinal necrosis is a diagnostic and therapeutic challenge. A 52 year old man presented with bilateral angle closure with choroidal detachment. With restricted fundus view, parenteral steroid was started. During close follow up bilateral discrete areas of peripheral retinitis were noted. Parenteral steroids were promptly stopped and parenteral antivirals with oral steroids were continued. It showed healing response with nil recurrences till last follow up...
June 2018: Indian Journal of Ophthalmology
Xin Wei, Kin-Sang Cho, Eric F Thee, Martine J Jager, Dong Feng Chen
Glaucoma is a complex neurodegenerative disease with many clinical subtypes. Some of its rare forms include pigmentary glaucoma, uveitic glaucoma and congenital glaucoma. While they all share common features of progressive retinal ganglion cell (RGC) loss, optic nerve damage and corresponding visual field loss, the exact mechanisms underlying glaucomatous neuron loss are not clear. This has largely hindered the development of a real cure for this disease. Elevated intraocular pressure (IOP) is a known major risk factor of glaucoma; however, progressive degeneration of RGCs and axons can also be found in patients with a normal IOP, i...
May 18, 2018: Journal of Neuroscience Research
Claudia Fabiani, Jurgen Sota, Donato Rigante, Antonio Vitale, Giacomo Emmi, Giuseppe Lopalco, Lorenzo Vannozzi, Silvana Guerriero, Alice Bitossi, Ida Orlando, Rossella Franceschini, Bruno Frediani, Mauro Galeazzi, Florenzo Iannone, Gian Marco Tosi, Luca Cantarini
The primary aim of the study was to evaluate the efficacy of tumor necrosis factor (TNF)-α blockers adalimumab (ADA) and infliximab (IFX) in refractory sight-threatening retinal vasculitis (RV) during a 12-month follow-up period. Secondary aims were to evaluate (i) any impact of concomitant conventional disease-modifying anti-rheumatic drugs (cDMARDs) and different lines of biologic therapy; (ii) any difference in terms of efficacy between ADA and IFX; (iii) consequences of biotherapies on the best-corrected visual acuity (BCVA); (iv) corticosteroid-sparing effect; and (vi) ocular complications during anti-TNF-α treatment...
May 15, 2018: Clinical Rheumatology
Y Di, J J Ye, D H Li
Objective: To analyze the relationship between optical coherence tomography(OCT) performance and visual acuity of patients with acute retinal necrosis (ARN). Methods: Retrospective analysis was performed on the patients diagnosed with ARN at the ophthalmology department of Peking union hospital during October 2011 and May 2016. Fourteen patients (15 eyes), 9 males and 5 females, whose anterior and posterior inflammation disappeared and the retinal necrosis lesion in the fundus of the eye subsided were included...
May 11, 2018: [Zhonghua Yan Ke za Zhi] Chinese Journal of Ophthalmology
Y Di, J J Ye
Acute retinal necrosis is an uncommon but devastating and potentially blinding ophthalmopathy featured with unfavorable prognosis as the lesions tend to develop rapidly in a circumferential way in few days. Therefore timely diagnosis and early treatment are of great significance. The polymerase chain reaction test on intraocular fluid can improve specificity and sensitivity of the etiological detection for acute retinal necrosis. Etiology results included in the diagnostic criteria is favorable for etiological diagnosis...
April 11, 2018: [Zhonghua Yan Ke za Zhi] Chinese Journal of Ophthalmology
Tiago E Arantes, Luiz H Lima, Gláucio L Bressanin, Cláudia D Marques, Ângela B Duarte, Cristina Muccioli
PURPOSE: To report unique retinal fundus lesions and treatment outcomes of intraocular tuberculosis in patients under anti-tumor necrosis factor treatment. METHODS: Retrospective review of two patients with laboratorial evidence of tuberculosis who had bilateral ocular signs and symptoms not attributable to other diseases. Multimodal imaging was analyzed at the time of presentation and after the treatment initiation. The study patients underwent standard treatment for tuberculosis...
May 4, 2018: Retinal Cases & Brief Reports
Amanda L Lumsden, Yuefang Ma, Liam M Ashander, Andrew J Stempel, Damien J Keating, Justine R Smith, Binoy Appukuttan
OBJECTIVE: Regulation of intercellular adhesion molecule (ICAM)-1 in retinal endothelial cells is a promising druggable target for retinal vascular diseases. The ICAM-1-related (ICR) long non-coding RNA stabilizes ICAM-1 transcript, increasing protein expression. However, studies of ICR involvement in disease have been limited as the promoter is uncharacterized. To address this issue, we undertook a comprehensive in silico analysis of the human ICR gene promoter region. RESULTS: We used genomic evolutionary rate profiling to identify a 115 base pair (bp) sequence within 500 bp upstream of the transcription start site of the annotated human ICR gene that was conserved across 25 eutherian genomes...
May 9, 2018: BMC Research Notes
Abdoulaye Sene, Rajendra S Apte
Neuroinflammation is an important aspect of many diseases of the eye, and experimental animal models have been widely used to determine its impact on retinal homeostasis and neuron survival. Physical separation of the neurosensory retina from the underlying retinal pigment epithelium (RPE) results in activation and infiltration of macrophages. Numerous studies have shown the critical role of macrophages in retinal disease processes. In retinal detachment, accumulation of macrophages in the subretinal space is associated with changes in cytokine and chemokine profile which lead to photoreceptor cell death...
2018: Advances in Experimental Medicine and Biology
John R Heckenlively, Steven K Lundy
Autoimmune retinopathy (AIR) was often mistaken for retinitis pigmentosa (RP), due to an overlap of clinical findings, but increasingly has been recognized as a unique entity in the last decade. AIR has distinctive features: sudden onset of photopsias and scotomata in patients with no family history of RP, followed by visual field and central vision loss. Initially, retina exams are normal with no sign of pigment deposits or retinal degeneration. A family history of autoimmune diseases (all types) occurs in 60% of patients...
2018: Advances in Experimental Medicine and Biology
Altaf A Kondkar, Tahira Sultan, Faisal A Almobarak, Hatem Kalantan, Saleh A Al-Obeidan, Khaled K Abu-Amero
Purpose: Retinal ganglion cell (RGC) death is a key feature of glaucoma. Elevated levels of tumor necrosis factor alpha (TNF-α), a pro-inflammatory cytokine, can induce RGC apoptosis and play a critical role in glaucomatous neurodegeneration. Based on the possible role of inflammation and oxidative stress in the pathogenesis of primary open-angle glaucoma (POAG), we investigated the association between plasma levels of TNF-α and POAG or its clinical indices in comparison to non-glaucomatous controls...
2018: Clinical Ophthalmology
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