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https://www.readbyqxmd.com/read/29783078/delayed-bipolar-and-ganglion-cells-neuroretinal-processing-in-regular-cannabis-users-the-retina-as-a-relevant-site-to-investigate-brain-synaptic-transmission-dysfunctions
#1
Thomas Schwitzer, Raymund Schwan, Karine Angioi-Duprez, Anne Giersch, Laurence Lalanne, Eliane Albuisson, Vincent Laprevote
Cannabis use is widespread worldwide, but the impact of smoking cannabis regularly on brain synaptic transmission has only been partially elucidated. The retina is considered as an easy means of determining dysfunction in brain synaptic transmission. The endocannabinoid system is involved in regulating retinal synaptic transmission, which might also be affected by tobacco. Previous preliminary results have shown impairments in retinal ganglion cell response in cannabis users. Here, we test the extent to which earlier retinal levels-bipolar cells and photoreceptors-are affected in cannabis users, i...
May 1, 2018: Journal of Psychiatric Research
https://www.readbyqxmd.com/read/29782973/enhanced-retinal-pigment-epithelium-rpe-regeneration-using-curcumin-alginate-hydrogels-in-vitro-evaluation
#2
Jong Ho Park, Eun Yeong Shin, Myeong Eun Shin, Min Joung Choi, Cristiano Carlomagno, Jeong Eun Song, Gilson Khang
The retinal pigment epithelium (RPE) plays a significant role in retaining structural integrity of eye. Factors such as reduction in cell regeneration due to aging and physical injury pose a major hurdle in RPE regeneration. In this study, we exploited the use of alginate (AGT) incorporated with Curcumin (CCI) forming a hydrogel based system CCI/AGT. The fabricated hydrogel could anchor RPE cell in it. In vitro cell analysis revealed that the CCI/AGT hydrogel shows good biocompatibility, enhanced cell growth ability and higher ECM formation compared to the pure AGT hydrogel...
May 18, 2018: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/29782826/sheets-of-human-retinal-progenitor-transplants-improve-vision-in-rats-with-severe-retinal-degeneration
#3
Bin Lin, Bryce T McLelland, Anuradha Mathur, Robert B Aramant, Magdalene J Seiler
Loss of photoreceptors and other retinal cells is a common endpoint in retinal degenerate (RD) diseases that cause blindness. Retinal transplantation is a potential therapy to replace damaged retinal cells and improve vision. In this study, we examined the development of human fetal retinal sheets with or without their retinal pigment epithelium (RPE) transplanted to immunodeficient retinal degenerate rho S334ter-3 rats. Sheets were dissected from fetal human eyes (11-15.7 weeks gestation) and then transplanted to the subretinal space of 24-31 d old RD nude rats...
May 18, 2018: Experimental Eye Research
https://www.readbyqxmd.com/read/29782408/rituximab-for-sight-threatening-lupus-related-retinal-vasculitis-erratum
#4
(no author information available yet)
No abstract text is available yet for this article.
June 2018: Journal of Clinical Rheumatology: Practical Reports on Rheumatic & Musculoskeletal Diseases
https://www.readbyqxmd.com/read/29782397/novel-preretinal-hair-pin-like-vessel-in-retinal-astrocytic-hamartoma-with-vitreous-hemorrhage
#5
Megumi Soeta, Yusuke Arai, Hidenori Takahashi, Yujiro Fujino, Tatsuro Tanabe, Yuji Inoue, Hidetoshi Kawashima
BACKGROUD/PURPOSE: To report a case of retinal astrocytic hamartoma with vitreous hemorrhage and a hair pin-like vessel adhering to a posterior vitreous membrane. A 33-year-old man with a retinal astrocytic hamartoma presented with vitreous hemorrhage 5 times. METHODS: Multimodal imaging, including fundus photography, fluorescein angiography, optical coherence tomography, and B-mode ultrasonography. RESULTS: Multimodal imaging demonstrated a novel hair pin-like vessel that adhered to the posterior vitreous membrane...
July 2018: Retinal Cases & Brief Reports
https://www.readbyqxmd.com/read/29782207/the-benzodiazepine-anesthetic-midazolam-prevents-hyperglycemia-induced-microvascular-leakage-in-the-retinas-of-diabetic-mice
#6
Yeon-Ju Lee, Minsoo Kim, Jee-Yeon Lee, Se-Hui Jung, Hye-Yoon Jeon, Seung Ah Lee, Seongsik Kang, Eun-Taek Han, Won Sun Park, Seok-Ho Hong, Young-Myeong Kim, Kwon-Soo Ha
We investigated the beneficial effects of midazolam against vascular endothelial growth factor (VEGF)-induced vascular leakage and its molecular mechanism of action in human retinal endothelial cells (HRECs) and the retinas of diabetic mice. Midazolam inhibited VEGF-induced elevation of intracellular Ca2+ , generation of reactive oxygen species (ROS), and transglutaminase activation in HRECs; these effects were reversed by the GABA, type A (GABAA ) receptor antagonist flumazenil but not by the translocator protein antagonist PK11195...
May 21, 2018: FASEB Journal: Official Publication of the Federation of American Societies for Experimental Biology
https://www.readbyqxmd.com/read/29781867/accelerated-onset-of-retinal-toxicity-from-hydroxychloroquine-use-with-concomitant-breast-cancer-therapy
#7
Aman Sharma, Alejandra M Maiz, William R Tucker, Catherine Cukras
PURPOSE: To report a case of accelerated retinal toxicity due to hydroxychloroquine (HCQ) use for treatment of Sjögren syndrome in a patient treated with concomitant chemotherapy for breast cancer. METHODS: Observational case report. RESULTS: A 56-year-old white woman using 400 mg HCQ (7.1 mg/kg real body weight) daily for a total of 2 years and 10 months for treatment of Sjögren syndrome with concomitant use of docetaxel and cyclophosphamide therapy (21-day cycle, 4 cycles) followed by anastrozole for breast cancer, presented with visual complaints and findings of severe HCQ toxicity...
May 16, 2018: Retinal Cases & Brief Reports
https://www.readbyqxmd.com/read/29781834/ocular-findings-in-exfoliation-syndrome
#8
Robert Ritch
Exfoliation syndrome (XFS) is characterized by numerous ocular manifestations, the most important of these being glaucoma and cataract. Its ocular manifestations affect all of the structures of the anterior segment as well as conjunctiva and orbital structures. Exfoliation material is seen most prominently as characteristic white deposits on the anterior surface of the lens and the pupillary border of the iris. Both open-angle and angle-closure glaucoma are intimately associated with XFS. Other findings include zonular disruption, iris sphincter fibrosis, keratopathy, ocular surface disease, and retinal vein occlusion...
May 17, 2018: Journal of Glaucoma
https://www.readbyqxmd.com/read/29781741/slowly-progressive-retinitis-pigmentosa-caused-by-two-novel-mutations-in-the-mak-gene
#9
Joanna Monika Gray, Harry Otway Orlans, Morag Shanks, Penny Clouston, Robert Elvis MacLaren
BACKGROUND: The growing number of clinical trials currently underway for inherited retinal diseases has highlighted the importance of achieving a molecular diagnosis for all new cases presenting to hospital eye services. The male germ cell-associated kinase (MAK) gene encodes a cilium-associated protein selectively expressed in the retina and testis, and has recently been implicated in autosomal recessive retinitis pigmentosa (RP). Whole exome sequencing has previously identified a homozygous Alu insertion in probands with recessive RP and nonsense and missense mutations have also been reported...
May 21, 2018: Ophthalmic Genetics
https://www.readbyqxmd.com/read/29781739/preimplantation-genetic-diagnosis-as-a-strategy-to-prevent-having-a-child-born-with-an-heritable-eye-disease
#10
Claudia Yahalom, Michal Macarov, Galit Lazer-Derbeko, Gheona Altarescu, Tal Imbar, Jordana H Hyman, Talia Eldar-Geva, Anat Blumenfeld
BACKGROUND: In developed countries, genetically inherited eye diseases are responsible for a high percentage of childhood visual impairment. We aim to report our experience using preimplantation genetic diagnostics (PGD) in order to avoid transmitting a genetic form of eye disease associated with childhood visual impairment and ocular cancer. MATERIAL AND METHODS: Retrospective case series of women who underwent in vitro fertilization (IVF) and PGD due to a familial history of inherited eye disease and/or ocular cancer, in order to avoid having a child affected with the known familial disease...
May 21, 2018: Ophthalmic Genetics
https://www.readbyqxmd.com/read/29781319/assessing-the-role-of-ranibizumab-in-improving-the-outcome-of-glaucoma-filtering-surgery-and-neovascular-glaucoma
#11
Andreas Katsanos, Kostantina Gorgoli, Dimitrios G Mikropoulos, Esther Arranz-Marquez, Georgios P Athanasopoulos, Miguel A Teus, Anastasios G P Konstas
Ranibizumab was the first anti-vascular endothelial growth factor (VEGF) agent approved for the treatment of neovascular age-related macular degeneration. The use of ranibizumab and other anti-VEGF medications in recent years has revolutionized the treatment of several sight-threatening retinal disorders. Emerging evidence has demonstrated that anti-VEGF treatment can offer advantages in the management of other ocular conditions where VEGFs play a key role: ocular scarring following glaucoma filtering surgery and neovascular glaucoma (NVG)...
May 19, 2018: Expert Opinion on Biological Therapy
https://www.readbyqxmd.com/read/29781190/in-situ-study-of-the-functions-of-bacterioruberin-in-the-dual-chromophore-photoreceptor-archaerhodopsin-4
#12
Chao Sun, Xiaoyan Ding, Haolin Cui, Yanan Yang, Sijin Chen, Anthony Watts, Xin Zhao
While certain archaeal ion pumps have been shown to contain two chromophores, retinal and carotenoid bacterioruberin, the functions of the bacterioruberin have not been well explored. To address this research gap, the recombinant archaerhodopsin-4 (aR4), either with retinal chromophore only or with both retinal and bacterioruberin chromophores, was successfully expressed together with endogenous lipids in H. salinarum L33 and MPK409 respectively. In situ solid-state NMR, supported by molecular spectroscopy and functional assays, revealed for the first time that the retinal thermal equilibrium in the dark-adapted state is modulated by bacterioruberin binding via a cluster of aromatic residues on helix E...
May 20, 2018: Angewandte Chemie
https://www.readbyqxmd.com/read/29780961/myopic-shift-in-a-pseudophakic-eye-with-an-accommodating-iol-following-vitrectomy-with-gas-tamponade
#13
Jonathan Aker, Jessica Dowling, Lawrence Halperin
Purpose: To report the case of a patient with Crystalens, an accommodating posterior-chamber intraocular lens (IOL), who experienced a myopic shift following subsequent vitrectomy with gas tamponade. We propose a hypothesis as to why this myopic shift occurred and analyze its validity based on current literature. Observations: A patient had cataract surgery with implantation of a Crystalens AT-50AO +21D. Preoperative A-scan measured anterior chamber depth (ACD) to be 3...
June 2018: American Journal of Ophthalmology Case Reports
https://www.readbyqxmd.com/read/29780957/optic-nerve-compression-as-a-late-complication-of-a-hydrogel-explant-with-silicone-encircling-band
#14
Niels Crama, Leo Kluijtmans, B Jeroen Klevering
Purpose: To present a complication of compressive optic neuropathy caused by a swollen hydrogel explant and posteriorly displaced silicone encircling band. Observations: A 72-year-old female patient presented with progressive visual loss and a tilted optic disc. Her medical history included a retinal detachment in 1993 that was treated with a hydrogel explant under a solid silicone encircling band. Visual acuity had decreased from 6/10 to 6/20 and perimetry showed a scotoma in the temporal superior quadrant...
June 2018: American Journal of Ophthalmology Case Reports
https://www.readbyqxmd.com/read/29780955/management-of-inadvertent-needle-penetration-resulting-in-subretinal-triamcinolone-acetonide-and-retinal-detachment
#15
Kimberly D Tran, Ashley M Crane, Harry W Flynn
Purpose: To report management of inadvertent needle penetration during subtenons triamcinolone acetonide administration resulting in retinal detachment. Observations: A 71-year-old female with history of diabetes, hypothyroidism, and mild myopia underwent subtenons triamcinolone acetonide (TA) injection in the right eye for nodular scleritis. There was unexpected patient movement concurrent with the injection resulting in needle penetration, subretinal and intravitreal injection of TA, superotemporal retinal break, and macula-involving retinal detachment...
June 2018: American Journal of Ophthalmology Case Reports
https://www.readbyqxmd.com/read/29780953/micropulse-laser-for-persistent-optic-disc-pit-maculopathy-a-case-report
#16
Carlos Andrés Valdés-Lara, Nicolás Crim, Gerardo García-Aguirre, Ismael Ávila Lule, Virgilio Morales-Cantón
Purpose: Optic disc pits (ODP) are rare and congenital anomalies of the optic disc, sometimes remaining asymptomatic. However, serous macular detachment or optic disc maculopathy is the most common complication, causing significant visual deterioration, without a current consensus about treatment. We describe a case of ODP maculopathy that was treated successfully with micropulse laser. Observations: A patient with ODP maculopathy remained with macular serous detachment after nine months of follow up after pars plana vitrectomy...
June 2018: American Journal of Ophthalmology Case Reports
https://www.readbyqxmd.com/read/29780952/arterial-macroaneurysm-of-the-optic-disc
#17
Cem Ozgonul, Cagri Giray Besirli
Purpose: We present fundus and spectral domain optical coherence tomography findings of a patient with an arterial macroaneurysm of the optic disc. Observations: An 87-year-old woman presented with blurry vision and was found to have a retinal arterial macroaneurysm on the optic disc. Spectral domain optical coherence tomography revealed abnormal saccular arterial dilatation on the disc with an elongation anteriorly and superficial prepapillary hemorrhages. After 2 months, aneurysm thrombosed spontaneously without any visual consequences...
June 2018: American Journal of Ophthalmology Case Reports
https://www.readbyqxmd.com/read/29780951/multi-drug-resistant-mycobacterium-chelonae-scleral-buckle-infection
#18
Daniel S Churgin, Kimberly D Tran, Ninel Z Gregori, Ryan C Young, Chrisfouad Alabiad, Harry W Flynn
Purpose: To describe a case of Multi-drug resistant Mycobacterium chelonae scleral buckle infection. Observations: A 56 year-old male with history of retinal detachment repair with scleral buckle 20 years prior presented with 8 months of intermittent pain and redness in the left eye. The patient was diagnosed with scleral buckle infection, the buckle was removed, and cultures revealed multi-drug resistant Mycobacterium chelonae. The postoperative course included orbital cellulitis treated with systemic linezolid, clarithromycin, and imipenem...
June 2018: American Journal of Ophthalmology Case Reports
https://www.readbyqxmd.com/read/29780947/eplerenone-as-a-novel-treatment-for-persistent-subretinal-fluid-following-retinal-detachment-surgery
#19
Arezu Haghighi, Jiun Do, Hossein Ameri
Purpose: To describe the clinical course of a patient with persistent subretinal fluid (SRF) after primary scleral buckle surgery for a rhegmatogenous retinal detachment (RRD) repair who was subsequently treated with oral eplerenone for resolution of SRF. Observations: A 34 year-old-male presented with a large bullous macula-involving RRD of unknown duration and underwent primary scleral buckle and retinotomy for drainage of subretinal fluid (SRF). His post-operative course was characterized by persistent macular SRF for 1...
June 2018: American Journal of Ophthalmology Case Reports
https://www.readbyqxmd.com/read/29780944/central-retinal-artery-occlusion-secondary-to-barlow-s-disease
#20
Carl S Wilkins, Katherine McCabe, Avnish Deobhakta, James Chelnis
Purpose: To report a rare case of isolated, unilateral CRAO in a young patient with mitral valve prolapse secondary to Barlow's disease. Observations: A 29-year-old woman with history of premature ventricular contractions and cardiac ablation presented to the emergency room after sudden onset painless visual loss in her left eye (OS). Her vision was 20/20 in her right eye and hand motion in the left. Fundus exam demonstrated a central retinal artery occlusion (CRAO) OS...
June 2018: American Journal of Ophthalmology Case Reports
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