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Retina and vitreous

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https://www.readbyqxmd.com/read/27918825/early-postnatal-hyperoxia-in-mice-leads-to-severe-persistent-vitreoretinopathy
#1
Paul G McMenamin, Rachel Kenny, Sjakon Tahija, Jeremiah Lim, Cecilia Naranjo Golborne, Xiangting Chen, Sheena Bouch, Foula Sozo, Bang Bui
Purpose: To describe a mouse model of hyperoxia-induced vitreoretinopathy that replicated some of the clinical and pathologic features encountered in infants with severe retinopathy of prematurity and congenital ocular conditions such as persistent hyperplastic primary vitreous. Methods: Experimental mice (C57BL/6J) were exposed to 65% oxygen between postnatal days (P)0 to P7 and studied at P10, P14, and 3, 5, 8, 20, and 40 weeks. Controls were exposed to normoxic conditions...
December 1, 2016: Investigative Ophthalmology & Visual Science
https://www.readbyqxmd.com/read/27909796/-clinical-morphological-and-molecular-biological-characteristics-of-the-aging-eye
#2
M R R Böhm, H Thomasen, F Parnitzke, K-P Steuhl
BACKGROUND: The physiological aging of the eye is associated with loss of visual function. Age-related changes of the eye can result in ophthalmological diseases. The aim of this article is to display morphological, histological and molecular biological alterations of the aging eye. MATERIAL AND METHODS: A web-based search and review of the literature for aging of the visual system including cornea, lens, vitreous humor, retina, retinal pigment epithelium (RPE), choroidea and optic nerve were carried out...
December 1, 2016: Der Ophthalmologe: Zeitschrift der Deutschen Ophthalmologischen Gesellschaft
https://www.readbyqxmd.com/read/27860331/extracellular-matrix-metalloproteinase-inducer-emmprin-is-a-potential-biomarker-of-angiogenesis-in-proliferative-diabetic-retinopathy
#3
Ahmed M Abu El-Asrar, Ajmal Ahmad, Kaiser Alam, Mohammad Mairaj Siddiquei, Ghulam Mohammad, Gert De Hertogh, Ahmed Mousa, Ghislain Opdenakker
PURPOSE: Extracellular matrix metalloproteinase inducer (EMMPRIN) promotes angiogenesis through matrix metalloproteinases (MMPs) and vascular endothelial growth factor (VEGF) production. We investigated the expression levels of EMMPRIN and correlated these levels with VEGF, MMP-1 and MMP-9 in proliferative diabetic retinopathy (PDR). In addition, we examined the expression of EMMPRIN in the retinas of diabetic rats and the effect of EMMPRIN on the induction of angiogenesis regulatory factors in human retinal microvascular endothelial cells (HRMECs)...
November 18, 2016: Acta Ophthalmologica
https://www.readbyqxmd.com/read/27854122/the-relationship-of-brimonidine-concentration-in-vitreous-body-to-the-free-concentration-in-retina-choroid-following-topical-administration-in-pigmented-rabbits
#4
Keisuke Shinno, Kazuya Kurokawa, Seiko Kozai, Akio Kawamura, Katsuhiro Inada, Hideki Tokushige
PURPOSE: Several studies showed that repeated topical administration of brimonidine tartrate ophthalmic solution reached the human vitreous concentration above 2 nM, which is the concentration necessary to activate the α2-adrenergic receptor. The purpose of this study was to elucidate the relationship of the brimonidine concentration in the vitreous body to the free concentration in the retina/choroid which is the target site of brimonidine on neuroprotective effect after topical administration...
November 17, 2016: Current Eye Research
https://www.readbyqxmd.com/read/27847641/poly-n-isopropylacrylamide-pnipam-a-reversible-bioadhesive-for-sclerotomy-closure
#5
Luiz H Lima, Yael Morales, Thiago Cabral
PURPOSE: To determine the safety and efficacy of poly-N-isopropylacrylamide, a thermoresponsive adhesive, for sutureless sclerotomy closure in rabbits. METHODS: Eight rabbits were randomized into three groups: short-term acute, mid-term chronic, and long-term chronic studies. A corresponding control group in which the scleral wounds were sutured by 6-0 vicryl sutures was assigned for each study group. A 20-gauge sclerotomy was performed following a core vitrectomy and 0...
2016: International Journal of Retina and Vitreous
https://www.readbyqxmd.com/read/27847625/reviewer-acknowledgement-2015
#6
EDITORIAL
Jay Duker, Eduardo Rodrigues
The Editors of International Journal of Retina and Vitreous would like to thank all of our reviewers, both external and Editorial Board Members, who have contributed to the journal in Volume 1 (2015) and whose valuable support is fundamental to the success of the journal.
2016: International Journal of Retina and Vitreous
https://www.readbyqxmd.com/read/27845192/controlling-drug-release-from-non-aqueous-environments-moderating-delivery-from-ocular-silicone-oil-drug-reservoirs-to-combat-proliferative-vitreoretinopathy
#7
Helen Cauldbeck, Maude Le Hellaye, Mark Long, Stephnie M Kennedy, Rachel L Williams, Victoria R Kearns, Steve P Rannard
In a number of cases of retinal detachment, treatment may require the removal of the vitreous humour within the eye and replacement with silicone oil to aid healing of the retina. The insertion of silicone oil offers the opportunity to also deliver drugs to the inside of the eye; however, drug solubility in silicone oil is poor and release from this hydrophobic drug reservoir is not readily controlled. Here, we have designed a range of statistical graft copolymers that incorporate dimethylsiloxane and ethylene glycol repeat units within the side chains, allowing short chains of oligo(ethylene glycol) to be solubilised within silicone oil and provide hydrogen bond acceptor sites to interact with acid functional drug molecules...
November 12, 2016: Journal of Controlled Release: Official Journal of the Controlled Release Society
https://www.readbyqxmd.com/read/27843434/peters-anomaly-in-twins-a-case-report-of-a-rare-incident-with-novel-comorbidities
#8
Hashem S Almarzouki, Alaa A Tayyib, Hassan A Khayat, Raed E Alsulami, Saeed M Alzahrani, Abdulaziz S Alkahtani, Loai S Alghifees
INTRODUCTION: Peters anomaly is a rare developmental malformation involving the anterior segment of the eye, which culminates in amblyopia or congenital blindness. Multiple ocular and/or systemic malformations have been observed with this anomaly, and novel comorbidities continue to be reported. CASE PRESENTATION: The probands were monozygotic twin boys (twin I and twin II) born to consanguineous parents at 36 weeks of gestation. Coarse facial features and deep-seated eyes were noted at birth...
September 2016: Case Reports in Ophthalmology
https://www.readbyqxmd.com/read/27833968/posterior-vitreous-detachment-and-macular-anatomical-changes-a-tomographic-electroretinographic-study
#9
Alin Ştefan Ştefănescu-Dima, Cornelia Andreea Corîci, Maria Rodica Mănescu, Teodor Nicuşor Sas, Maria Iancău, Carmen LuminiŢa Mocanu
AIM: Posterior vitreous detachment (PVD) is a physiological phenomenon due to aging characterized by separation of the vitreous cortex from the retina and may induce a variety of pathological events at the vitreoretinal junction. The aim of this study is to highlight in vivo anatomical and functional changes in early stages of PVD allowing the correct treatment. MATERIAL AND METHODS: Non-consecutive case series; optical coherence tomography (OCT) relies on analyzing the reflectivity of coherent light from different anatomical interfaces within posterior vitreous and retinal histological layers, thus acquiring transverse sections through vitreoretinal interface, sensory retina, retinal pigment epithelium and choroid...
2016: Romanian Journal of Morphology and Embryology, Revue Roumaine de Morphologie et Embryologie
https://www.readbyqxmd.com/read/27829784/irbp-deficiency-permits-precocious-ocular-development-and-myopia
#10
Shanu Markand, Natecia L Baskin, Ranjay Chakraborty, Erica Landis, Sara A Wetzstein, Kevin J Donaldson, Priyanka Priyadarshani, Shannon E Alderson, Curran S Sidhu, Jeffrey H Boatright, P Michael Iuvone, Machelle T Pardue, John M Nickerson
PURPOSE: Interphotoreceptor retinoid-binding protein (IRBP) is abundant in the subretinal space and binds retinoids and lipophilic molecules. The expression of IRBP begins precociously early in mouse eye development. IRBP-deficient (KO) mice show less cell death in the inner retinal layers of the retina before eyelid opening compared to wild-type C57BL/6J (WT) controls and eventually develop profound myopia. Thus, IRBP may play a role in eye development before visually-driven phenomena...
2016: Molecular Vision
https://www.readbyqxmd.com/read/27828909/incomplete-repair-of-retinal-structure-after-vitrectomy-with-internal-limiting-membrane-peeling
#11
Toshio Hisatomi, Takashi Tachibana, Shoji Notomi, Shunji Nakatake, Kohta Fujiwara, Yusuke Murakami, Yasuhiro Ikeda, Shigeo Yoshida, Hiroshi Enaida, Toshinori Murata, Taiji Sakamoto, Koh-Hei Sonoda, Tatsuro Ishibashi
PURPOSE: To examine retinal changes after vitrectomy with internal limiting membrane (ILM) peeling, we used a cynomolgus monkey model and focused on surgical damages of ILM peeling for long observational period of 3 years. METHODS: Vitrectomy was performed followed by ILM peeling similar to clinical settings in humans. Ultrastructural changes of the retina were investigated by light, transmission, and scanning electron microscopy at 3 months and 3 years after ILM peeling...
November 8, 2016: Retina
https://www.readbyqxmd.com/read/27828906/a-case-of-metastatic-urothelial-carcinoma-of-the-retina-and-vitreous
#12
Katherine E Whalen, Ralph C Eagle, Tamara R Vrabec
PURPOSE: To report a rare case of vitreoretinal metastasis from urothelial carcinoma of the bladder. METHODS: Case report. RESULTS: A 55-year-old male with a history of bladder cancer developed atypical vitritis and a white fundus mass. IV fluorescein angiography demonstrated connection between the retinal and tumor vasculature consistent with a retinal malignancy. Cytologic analysis of the vitreous sample revealed large atypical cells with pleomorphic nuclei, mucin vacuoles, and rare mitotic figures...
November 8, 2016: Retinal Cases & Brief Reports
https://www.readbyqxmd.com/read/27828902/bilateral-metastatic-cutaneous-melanoma-to-retina-and-vitreous-after-ipilimumab-treated-with-pars-plana-vitrectomy-and-radiotherapy
#13
Sam Kanavati, Christian Ottensmeier, Vipul Foria, Radhika Krishnan
PURPOSE: To report a patient with bilateral metastatic cutaneous melanoma to the retina and vitreous presenting as a right panuveitis. METHODS: A 63-year-old woman with metastatic malignant cutaneous melanoma treated with ipilimumab and prolonged high-dose steroids presented with a right panuveitis and right blurred vision. Dilated fundus examination revealed bilateral, off-white, large, globular vitreous opacities and bilateral retinal lesions. These retinal lesions had a pale yellow appearance with a cuff of haemorrhage...
November 8, 2016: Retinal Cases & Brief Reports
https://www.readbyqxmd.com/read/27818205/histopathologic-analysis-of-trans-vitreal-fine-needle-aspiration-biopsy-needle-tracts-for-uveal-melanoma
#14
Ryan S Kim, Patricia Chevez-Barrios, Maria E Bretana, Tien P Wong, Bin S Teh, Amy C Schefler
PURPOSE: Perform the first in vivo examination of fine needle aspiration biopsy scleral tracts to determine the incidence of iatrogenic extension of tumor cells. DESIGN: A prospective, consecutive, observational case series. METHODS: Setting: Clinical/surgical setting at Retina Consultants of Houston and Houston Methodist Hospital, Houston, TX. PARTICIPANTS: Ten patients who were scheduled for enucleation as primary treatment for uveal melanoma...
November 3, 2016: American Journal of Ophthalmology
https://www.readbyqxmd.com/read/27810420/postmortem-vitreous-bevacizumab-levels-of-an-infant-treated-for-retinopathy-of-prematurity
#15
Stephen Hypes, Orwa Nasser, Nancy Hanna, William Lawhon, Rachida Bouhenni, Richard W Hertle
We report the vitreous concentration of bevacizumab after injection for the treatment of retinopathy of prematurity (ROP). A premature neonate diagnosed with type 1 ROP was treated in both eyes with 0.625 mg intravitreal bevacizumab injection at 32 weeks' postconceptual age. Eleven weeks later there was complete regression clinically, but the patient died. Vitreous samples taken at autopsy revealed a bevacizumab vitreous concentration of 41.57 ng/ml. Histopathology of the retina showed residual preretinal neovascularization...
October 31, 2016: Journal of AAPOS: the Official Publication of the American Association for Pediatric Ophthalmology and Strabismus
https://www.readbyqxmd.com/read/27809288/mmp-3-deficiency-alleviates-endotoxin-induced-acute-inflammation-in-the-posterior-eye-segment
#16
Inge Van Hove, Evy Lefevere, Lies De Groef, Jurgen Sergeys, Manuel Salinas-Navarro, Claude Libert, Roosmarijn Vandenbroucke, Lieve Moons
Matrix metalloproteinase-3 (MMP-3) is known to mediate neuroinflammatory processes by activating microglia, disrupting blood-central nervous system barriers and supporting neutrophil influx into the brain. In addition, the posterior part of the eye, more specifically the retina, the retinal pigment epithelium (RPE) and the blood-retinal barrier, is affected upon neuroinflammation, but a role for MMP-3 during ocular inflammation remains elusive. We investigated whether MMP-3 contributes to acute inflammation in the eye using the endotoxin-induced uveitis (EIU) model...
November 1, 2016: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/27800245/chemotherapy-in-retinoblastoma-current-approaches
#17
REVIEW
Özge Yanık, Kaan Gündüz, Kıvılcım Yavuz, Nurdan Taçyıldız, Emel Ünal
Retinoblastoma (RB) is the most common childhood malignant intraocular tumor. Although enucleation and external beam radiotherapy have been historically used, today the most commonly used eye-sparing approach is chemotherapy. Chemotherapy can be used in both intraocular and extraocular RB cases. Chemotherapeutic agents may be applied in different ways, including systemic, subconjunctival, intra-arterial and intravitreal routes. The main purposes of application of systemic therapy are to reduce the tumor size for local treatment (chemoreduction), or to reduce the risk of metastasis after enucleation surgery (adjuvant therapy)...
December 2015: Turkish Journal of Ophthalmology
https://www.readbyqxmd.com/read/27797960/senescence-associated-secretory-phenotype-contributes-to-pathological-angiogenesis-in-retinopathy
#18
Malika Oubaha, Khalil Miloudi, Agnieszka Dejda, Vera Guber, Gaëlle Mawambo, Marie-Anne Germain, Guillaume Bourdel, Natalija Popovic, Flavio A Rezende, Randal J Kaufman, Frédérick A Mallette, Przemyslaw Sapieha
Pathological angiogenesis is the hallmark of diseases such as cancer and retinopathies. Although tissue hypoxia and inflammation are recognized as central drivers of vessel growth, relatively little is known about the process that bridges the two. In a mouse model of ischemic retinopathy, we found that hypoxic regions of the retina showed only modest rates of apoptosis despite severely compromised metabolic supply. Using transcriptomic analysis and inducible loss-of-function genetics, we demonstrated that ischemic retinal cells instead engage the endoplasmic reticulum stress inositol-requiring enzyme 1α (IRE1α) pathway that, through its endoribonuclease activity, induces a state of senescence in which cells adopt a senescence-associated secretory phenotype (SASP)...
October 26, 2016: Science Translational Medicine
https://www.readbyqxmd.com/read/27787452/rhegmatogenous-retinal-detachment-after-intraarterial-chemotherapy-for-retinoblastoma-the-2016-founders-award-lecture
#19
Carol L Shields, Emil A T Say, Maria Pefkianaki, Carl D Regillo, Emi H Caywood, Pascal M Jabbour, Jerry A Shields
PURPOSE: To evaluate rhegmatogenous retinal detachment (RRD) in eyes with retinoblastoma after intraarterial chemotherapy (IAC). DESIGN: Retrospective case series. METHODS: Chart review. MAIN OUTCOME MEASURE: Development of RRD in the IAC era. RESULTS: Of 167 eyes in 157 consecutive patients, mean patient age at diagnosis of retinoblastoma was 19 months. Intraarterial chemotherapy was primary (75/167, 45%) or secondary (92/167, 55%)...
October 26, 2016: Retina
https://www.readbyqxmd.com/read/27786583/the-efficacy-and-safety-profile-of-ocriplasmin-in-vitreomacular-interface-disorders
#20
Mehrine Shaikh, John B Miller, Thanos D Papakostas, Deeba Husain
Vitreomacular adhesion (VMA) describes the adhesion of the posterior hyaloid face to the inner retina in any part of the macula. This can arise after incomplete separation of the posterior vitreous cortex from the macula during vitreous liquefaction. While the VMA may resolve spontaneously, a strong and persistent adhesion can lead to a variety of anatomical changes, including vitreomacular traction (VMT) and macular hole (MH). Both conditions can present with metamorphopsia and decreased vision. In cases of symptomatic VMT and full-thickness macular hole, pars plana vitrectomy has long been the standard of care...
October 27, 2016: Seminars in Ophthalmology
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