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https://www.readbyqxmd.com/read/28431436/enhanced-tearing-by-electrical-stimulation-of-the-anterior-ethmoid-nerve
#1
Mark Brinton, Andrea L Kossler, Zara M Patel, James Loudin, Manfred Franke, Christopher N Ta, Daniel Palanker
Purpose: Electrical neurostimulation enhances tear secretion, and can be applied to treatment of dry eye disease. Using a chronic implant, we evaluate the effects of stimulating the anterior ethmoid nerve on the aqueous, lipid, and protein content of secreted tears. Methods: Neurostimulators were implanted beneath the nasal mucosa in 13 New Zealand white rabbits. Stimulations (2.3-2.8 mA pulses of 75-875 μs in duration repeated at 30-100 Hz for 3 minutes) were performed daily, for 3 weeks to measure changes in tear volume (Schirmer test), osmolarity (TearLab osmometer), lipid (Oil-Red-O staining), and protein (BCA assay, mass spectrometry)...
April 1, 2017: Investigative Ophthalmology & Visual Science
https://www.readbyqxmd.com/read/28429294/ocular-cubosome-drug-delivery-system-for-timolol-maleate-preparation-characterization-cytotoxicity-ex-vivo-and-in-vivo-evaluation
#2
Jiayuan Huang, Tingting Peng, Yanrong Li, Zhengwen Zhan, Youmei Zeng, Ying Huang, Xin Pan, Chuan-Yu Wu, Chuanbin Wu
Glaucoma is an ocular disease featuring increased intraocular pressure (IOP) and its primary treatment strategy is to lower IOP by medication. Current ocular drug delivery in treating glaucoma is confronting a variety of challenges, such as low corneal permeability and bioavailability due to the unique anatomical structure of the human eye. To tackle these challenges, a cubosome drug delivery system for glaucoma treatment was constructed for timolol maleate (TM) in this study. The TM cubosomes (liquid crystalline nanoparticles) were prepared using glycerol monooleate and poloxamer 407 via high-pressure homogenization...
April 20, 2017: AAPS PharmSciTech
https://www.readbyqxmd.com/read/28426441/diagnosis-of-corneal-limbal-stem-cell-deficiency
#3
Kyeong Hwan Kim, Shahzad I Mian
PURPOSE OF REVIEW: A state of limbal stem cell deficiency (LSCD) can be secondary to a number of etiologies, resulting in either a reduction in the total number of limbal stem cells or an abnormality in stem cell function. Initially, the epithelium becomes irregular and hazy; however, this condition may progress to persistent corneal epithelial defects, stromal scarring, ulceration, and even perforation. Since LSCD secondary to a variety of etiologies may be reversible, and various factors are prognostic of disease progression, timely diagnosis is important...
April 19, 2017: Current Opinion in Ophthalmology
https://www.readbyqxmd.com/read/28418539/ophthalmic-manifestations-of-congenital-zika-syndrome-in-colombia-and-venezuela
#4
Juan B Yepez, Felipe A Murati, Michele Pettito, Carlos F Peñaranda, Jazmin de Yepez, Gladys Maestre, J Fernando Arevalo
Importance: The ocular manifestations and sequelae of Zika virus infection are not well known. Recently, the World Health Organization changed the declaration of Zika as a public health emergency and designated the viral outbreak and related microcephaly clusters as a long-term program of work. This change indicates the urgent need to evaluate and document ophthalmic manifestations in patients for timely management of this disease. In addition, confirmation whether the public health problem in Brazil extends to other regions in South America is needed...
April 13, 2017: JAMA Ophthalmology
https://www.readbyqxmd.com/read/28416382/isolation-pathogenicity-and-characterization-of-a-novel-bacterial-pathogen-streptococcus-uberis-from-diseased-mandarin-fish-siniperca-chuatsi
#5
Xia Luo, Xiaozhe Fu, Guoli Liao, Ouqin Chang, Zhibin Huang, Ningqiu Li
In recent years, mandarin fish had a high mortality rate associated with abnormal swimming, exophthalmia, corneal opacity and eye hemorrhage on a fish farm located at Foshan city, Guangdong province, China. Three isolates of Gram-positive, chain-forming cocci were recovered from moribund fish, and designated as SS131025-1, SS131025-2, and SS131025-3. These isolates were identified as Streptococcus uberis according to their morphologic and physio-biochemical characteristics as well as phylogenetic analysis based on their 16S rRNA and GapC gene sequences...
April 14, 2017: Microbial Pathogenesis
https://www.readbyqxmd.com/read/28414732/active-transforming-growth-factor-%C3%AE-2-in-the-aqueous-humor-of-posterior-polymorphous-corneal-dystrophy-patients
#6
Andrea Stadnikova, Lubica Dudakova, Pavlina Skalicka, Zdenek Valenta, Martin Filipec, Katerina Jirsova
PURPOSE: Posterior polymorphous corneal dystrophy (PPCD) is characterized by abnormal proliferation of corneal endothelial cells. It was shown that TGF-β2 present in aqueous humor (AH) could help maintaining the corneal endothelium in a G1-phase-arrest state. We wanted to determine whether the levels of this protein are changed in AH of PPCD patients. METHODS: We determined the concentrations of active TGF-β2 in the AH of 29 PPCD patients (42 samples) and 40 cadaver controls (44 samples) by ELISA...
2017: PloS One
https://www.readbyqxmd.com/read/28410354/effects-of-tear-film-lipid-layer-thickness-and-blinking-pattern-on-tear-film-instability-after-corneal-refractive-surgery
#7
Qingzhong Chen, Min Li, Ying Yuan, Rao Me, Yunjie Yu, Guangsen Shi, Xin Wang, Bilian Ke
PURPOSE: To investigate associations between changes in tear film instability and the lipid layer thickness (LLT) and blink pattern after corneal refractive surgery (CRS). METHODS: Forty patients were enrolled in this study. The LLT and blink pattern were evaluated 1 week before and 30 days after CRS using a novel interferometer and an ocular surface disease index (OSDI) questionnaire, and other tear film stability markers were also evaluated. RESULTS: Mean OSDI scores increased from 5...
April 13, 2017: Cornea
https://www.readbyqxmd.com/read/28407842/the-prevalence-of-glaucoma-in-young-people
#8
Susanne Marx-Gross, Dagmar Laubert-Reh, Astrid Schneider, René Höhn, Alireza Mirshahi, Thomas Münzel, Philipp S Wild, Manfred E Beutel, Maria Blettner, Norbert Pfeiffer
BACKGROUND: Earlier information on the prevalence of glaucoma among children in Germany was based solely on estimates. Reported values for congenital glaucoma range from 1 in 10 000 to 1 in 68 000 depending on ethnic origin. The estimate for juvenile glaucoma is 1 in 44 000. METHODS: The Gutenberg Health Study is a populationbased, prospective, monocentric cohort study with 15 010 participants aged 35 to 74. To determine the history-based prevalence of childhood glaucoma, participants were asked about the diagnosis of glaucoma, any operations for glaucoma that were performed, regular use of drugs for glaucoma, and the age of onset of glaucoma...
March 24, 2017: Deutsches Ärzteblatt International
https://www.readbyqxmd.com/read/28406800/simple-limbal-epithelial-transplantation
#9
Virender S Sangwan, John A H Sharp
PURPOSE OF REVIEW: Simple limbal epithelial transplant (SLET) is a technique for addressing limbal stem cell deficiency. Limbal tissue from a donor eye, typically the patient's fellow healthy eye, is transplanted onto an amniotic membrane attached to the surface of the diseased eye. SLET was developed to address limitations of other techniques. Specifically, the technical difficulty of ex-vivo expansion of cells required in some techniques and the larger amount of valuable limbal tissue harvested in techniques not relying on ex-vivo expansion...
April 12, 2017: Current Opinion in Ophthalmology
https://www.readbyqxmd.com/read/28404521/diabetic-complications-in-the-cornea
#10
Alexander V Ljubimov
Diabetic corneal alterations, such as delayed epithelial wound healing, edema, recurrent erosions, neuropathy/loss of sensitivity, and tear film changes are frequent but underdiagnosed complications of both type 1 (insulin-dependent) and type 2 (non-insulin-dependent) diabetes mellitus. The disease affects corneal epithelium, corneal nerves, tear film, and to a lesser extent, endothelium, and also conjunctiva. These abnormalities may appear or become exacerbated following trauma, as well as various surgeries including retinal, cataract or refractive...
April 9, 2017: Vision Research
https://www.readbyqxmd.com/read/28401586/phospholipidomic-studies-in-human-cornea-from-climatic-droplet-keratopathy
#11
M Fernanda Suarez, M Carmen Piqueras, Leandro Correa, Evangelina Esposito, M Fernanda Barros, Sanjoy K Bhattacharya, Julio A Urrets-Zavalia, Horacio M Serra
Climatic droplet keratopathy (CDK) is an acquired degenerative disease predominantly affecting males over 40 years old. It results in progressive corneal opacities usually affecting both eyes. CDK is multifactorial and its etiology remains unknown. Our recent findings are consistent with CDK pathology being driven by environmental factors with oxidative stress playing an important role (for example, contributing to lipid peroxidation) rather than climate factors. The changes in corneal lipid composition affected by environmental factors remain understudied...
April 12, 2017: Journal of Cellular Biochemistry
https://www.readbyqxmd.com/read/28400889/evaluation-of-ocular-surface-disease-in-asian-patients-with-primary-angle-closure
#12
Tan Ee Ling, Khairuddin Othman, Ong Poh Yan, Rasdi Abdul Rashid, Cheong Min Tet, Azhany Yaakob, Liza-Sharmini Ahmad Tajudin
OBJECTIVE: To evaluate the incidence of ocular surface disease (OSD) and to determine the effects of topical pressure-lowering drugs on ocular surface disease in primary angle closure patients. METHODS: This was a cross-sectional comparative study comparing primary angle closure glaucoma (PACG) patients (Group A) with primary angle closure and primary angle closure suspect (Group B). Group A was treated with topical pressure-lowering drugs; Group B was not. Data on ocular diagnosis and details of treatment were obtained from medical records...
2017: Open Ophthalmology Journal
https://www.readbyqxmd.com/read/28400699/ladd-syndrome-with-glaucoma-is-caused-by-a-novel-gene
#13
Allie Simpson, Armin Avdic, Ben R Roos, Adam DeLuca, Kathy Miller, Michael J Schnieders, Todd E Scheetz, Wallace L M Alward, John H Fingert
PURPOSE: Lacrimo-auriculo-dento-digital (LADD) syndrome is an autosomal dominant disorder displaying variable expression of multiple congenital anomalies including hypoplasia or aplasia of the lacrimal and salivary systems causing abnormal tearing and dry mouth. Mutations in the FGF10, FGFR2, and FGFR3 genes were found to cause some cases of LADD syndrome in prior genetic studies. The goal of this study is to identify the genetic basis of a case of LADD syndrome with glaucoma and thin central corneal thickness (CCT)...
2017: Molecular Vision
https://www.readbyqxmd.com/read/28399068/descemet-membrane-endothelial-keratoplasty-and-refractive-surgery
#14
C Maya Tong, Lamis Baydoun, Gerrit R J Melles
PURPOSE OF REVIEW: Descemet membrane endothelial keratoplasty (DMEK) has become a first-line treatment in corneal endothelial diseases because of its exceptional clinical outcomes and low complication rates. Because of its improved refractive predictability, DMEK is now also considered for managing cases with endothelial decompensation following previous refractive procedures, or in combination with those. This article reviews the clinical outcomes in these cases and discusses the possibility of refractive interventions following DMEK...
April 8, 2017: Current Opinion in Ophthalmology
https://www.readbyqxmd.com/read/28397860/whole-exome-sequencing-of-congenital-glaucoma-patients-reveals-hypermorphic-variants-in-gpatch3-a-new-gene-involved-in-ocular-and-craniofacial-development
#15
Jesús-José Ferre-Fernández, José-Daniel Aroca-Aguilar, Cristina Medina-Trillo, Juan-Manuel Bonet-Fernández, Carmen-Dora Méndez-Hernández, Laura Morales-Fernández, Marta Corton, María-José Cabañero-Valera, Marta Gut, Raul Tonda, Carmen Ayuso, Miguel Coca-Prados, Julián García-Feijoo, Julio Escribano
Congenital glaucoma (CG) is a heterogeneous, inherited and severe optical neuropathy that originates from maldevelopment of the anterior segment of the eye. To identify new disease genes, we performed whole-exome sequencing of 26 unrelated CG patients. In one patient we identified two rare, recessive and hypermorphic coding variants in GPATCH3, a gene of unidentified function, and 5% of a second group of 170 unrelated CG patients carried rare variants in this gene. The recombinant GPATCH3 protein activated in vitro the proximal promoter of CXCR4, a gene involved in embryo neural crest cell migration...
April 11, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28393022/two-mutations-in-the-transforming-growth-factor-beta-induced-gene-associated-with-familial-lattice-corneal-dystrophy
#16
Wen-Ping Cao, Hai-Gang Yuan, Ping Liu, Xue Li, Qi Hu
AIM: To report a phenotypic variant pedigree of lattice corneal dystrophy (LCD) associated with two mutations, R124C and A546D, in the transforming growth factor beta-induced gene (TGFBI). METHODS: A detailed ocular examination was taken for all participants of a LCD family. Peripheral blood leukocytes from each participant were extracted to obtain the DNA. Polymerase chain reaction (PCR) of all seventeen exons of TGFBI gene was performed. The products were sequenced and analyzed...
2017: International Journal of Ophthalmology
https://www.readbyqxmd.com/read/28393020/effects-of-exogenous-recombinant-human-bone-morphogenic-protein-7-on-the-corneal-epithelial-mesenchymal-transition-and-fibrosis
#17
Jin Kwon Chung, Shin Ae Park, Hee Sun Hwang, Kwang Sung Kim, Yang Je Cho, Yong Sung You, Young Sik Kim, Ju Woong Jang, Sung Jin Lee
AIM: To evaluate the effect of exogenous recombinant human bone morphogenic protein-7 (rhBMP-7) on transforming growth factor-β (TGF-β)-induced epithelial mesenchymal cell transition (EMT) and assessed its antifibrotic effect via topical application. METHODS: The cytotoxic effect of rhBMP-7 was evaluated and the EMT of human corneal epithelial cells (HECEs) was induced by TGF-β. HECEs were then cultured in the presence of rhBMP-7 and/or hyaluronic acid (HA). EMT markers, fibronectin, E-cadherin, α-smooth muscle actin (α-SMA), and matrix metaloproteinase-9 (MMP-9), were evaluated...
2017: International Journal of Ophthalmology
https://www.readbyqxmd.com/read/28386160/a%C3%A2-serious-adverse-surgical-event-management-of-suspected-hsv-1-keratitis-in-a%C3%A2-donor-cornea
#18
Rebecca Kaye, Bernhard Steger, Jern Y Chen, Vito Romano
PURPOSE: To describe the management of a serious adverse event in a patient undergoing penetrating keratoplasty (PK). CASE REPORT: A 68-year-old man underwent PK for an aphakic bullous keratopathy following previous complicated cataract surgery. He had no past history of herpetic disease. Storage of the corneoscleral disc in the transport bottle precluded microscopic examination. After placement of the trephined donor cornea on the open eye of the recipient, a large dendritiform geographic ulcer was noted on the donor cornea...
2017: Spektrum der Augenheilkunde: Zeitschrift der Österreichischen Ophthalmologischen Gesellschaft, ÖOG
https://www.readbyqxmd.com/read/28386159/severe-reactive-ischemic-posterior-segment-inflammation-in-acanthamoeba-keratitis-case-report-of-a%C3%A2-patient-with-sj%C3%A3-gren-s-syndrome
#19
Christoph Palme, Bernhard Steger, Gertrud Haas, Barbara Teuchner, Nikolaos E Bechrakis
PURPOSE: We report on a case of Acanthamoeba keratitis (AK)-related reactive ischemic posterior segment inflammation following intraocular surgery in a patient with primary Sjögren's syndrome (PSS). CASE REPORT: A 48-year-old female patient with severe protracted AK underwent uneventful cataract surgery upon development of a corneal scar. Four weeks postoperatively, she experienced a rapid loss of vision to no light perception. Central retinal artery occlusion and ischemic optic neuropathy could be excluded, and a diagnosis of PSS was made...
2017: Spektrum der Augenheilkunde: Zeitschrift der Österreichischen Ophthalmologischen Gesellschaft, ÖOG
https://www.readbyqxmd.com/read/28384900/efficacy-of-green-tea-extract-for-treatment-of-dry-eye-and-meibomian-gland-dysfunction-a-double-blind-randomized-controlled-clinical-trial-study
#20
Mahmood Nejabat, Salehi Ali Reza, Mehdi Zadmehr, Masoud Yasemi, Zahra Sobhani
INTRODUCTION: With an incidence rate of 9%, dry eye is a common problem of the ocular surface, especially in patients more than 40-year-old. Green tea extract has anti-oxidative, anti-bacterial, anti-androgen, and immunomodulatory properties. AIM: To evaluate the efficacy of green tea extract for treatment of patients with dry eye and Meibomian Gland Dysfunction (MGD). MATERIALS AND METHODS: In a double-blind randomized controlled clinical trial, 60 patients were selected within the age range of 30 to 70 years, and divided into two groups by blocked randomization method...
February 2017: Journal of Clinical and Diagnostic Research: JCDR
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