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https://www.readbyqxmd.com/read/29031854/angptl-4-induces-diabetic-retinal-inflammation-by-activating-profilin-1
#1
Qianyi Lu, Peirong Lu, Wei Chen, Li Lu, Zhi Zheng
Diabetic retinopathy (DR), the most common cause of irreversible blindness in working-age adults, results in central vision loss that is caused by microvascular damage to the inner lining of the back of the eye, the retina. The aim of this work was to assess the temporal relationships between angiopoietin-like protein-4 (ANGPTL-4), a novel adipocytokine factor, and diabetic retinal inflammation and microvascular dysfunction. The downstream pathway(s) and upstream mediator(s) of ANGPTL-4 were then determined under high glucose (HG) conditions...
October 12, 2017: Experimental Eye Research
https://www.readbyqxmd.com/read/29023269/all-probe-vitrectomy-dissection-techniques-for-diabetic-tractional-retinal-detachments-lift-and-shave
#2
María H Berrocal
To describe a technique to relieve traction, remove fibrovascular tissue, and reattach the retina in cases of tractional retinal detachment secondary to complications of diabetes using only the vitrectomy probe. PURPOSE: To describe the all-probe lift and shave technique to remove fibrovascular tissue and repair diabetic retinal detachments. Anatomical and visual acuity outcomes with this technique are presented. METHODS: In this single surgeon, retrospective review of a consecutive series of eyes with tractional retinal detachment associated with diabetic retinopathy repaired with probe-only dissection techniques...
October 11, 2017: Retina
https://www.readbyqxmd.com/read/29022761/noninvasive-ocular-drug-delivery-system-of-dexamethasone-sodium-phosphate-in-the-treatment-of-experimental-uveitis-rabbit
#3
Kongnara Papangkorn, Eri Prendergast, John W Higuchi, Balbir Brar, William I Higuchi
PURPOSE: To investigate the efficacy and safety of dexamethasone sodium phosphate administered through Visulex system (DSP-Visulex) in treating experimental uveitis. METHODS: Uveitis was induced in rabbits by subcutaneous injections of complete Freund's adjuvant and an intravitreal injection of H37RA antigen. After induction, the animals of the control group received no treatment and the others received various treatment regimens of DSP-Visulex. Each regimen was different in DSP strength (4%, 8%, and 15%), application time, or treatment frequency...
October 12, 2017: Journal of Ocular Pharmacology and Therapeutics
https://www.readbyqxmd.com/read/29020432/acquired-nonpigmented-vitreous-cyst-associated-with-lattice-degeneration
#4
Jing Lu, Guiying Mai, Ruyuan Liu, Yan Luo, Lin Lu
A 63-year-old male presented with a round-shaped floater and visual obscuration in the right eye. Clinical evaluation showed a nonpigmented vitreous cyst connected to a lattice degeneration by a stalk. Immunostaining of the vitreous cyst obtained from vitrectomy showed its origin of retinal neuroepithelium. The cyst was formed by continuous vitreous traction, which might tear up the disrupted retina at the area of lattice degeneration. This report added the lattice degeneration to the list of causes for the acquired vitreous cyst...
October 1, 2017: Ophthalmic Surgery, Lasers & Imaging Retina
https://www.readbyqxmd.com/read/28993861/-intraocular-metastases
#5
REVIEW
D Westerwick, F Driever, C H D Le Guin, K W Schmid, K A Metz
Metastatic cancer represents the most common form of intraocular malignancy. Due to its abundant vascular supply the choroid is the most common ocular site for intraocular metastatic disease (approximately 90%). Less than 10% of intraocular metastases are located in the iris and/or ciliary body, whereas the retina and vitreous are rarely affected. Most intraocular metastases are carcinomas; the majority of metastases originate from breast cancer in females and lung cancer in males. However, virtually every primary malignancy has been described to metastasize to intraocular structures...
October 9, 2017: Der Pathologe
https://www.readbyqxmd.com/read/28986343/treatment-of-experimental-autoimmune-uveoretinitis-with-intravitreal-injection-of-infliximab-encapsulated-in-liposomes
#6
Rui Zhang, Jiang Qian, Xiaofeng Li, Yifei Yuan
AIMS: To evaluate the safety and efficacy of intravitreal injection of liposomes encapsulating infliximab in experimental autoimmune uveoretinitis (EAU) rats. METHODS: Liposomes containing infliximab were prepared and characterised for mean particle size, entrapment efficiency, polydispersity index (PDI) and zeta potential. In vitro release profile and the stability of infliximab-lip were evaluated. EAU rats were intravitreally injected with saline, infliximab, infliximab-lip or unloaded liposomes...
October 6, 2017: British Journal of Ophthalmology
https://www.readbyqxmd.com/read/28985803/flashes-and-floaters-a-survey-of-canadian-ophthalmology-residents-practice-patterns
#7
Parnian Arjmand, Bernard Hurley
BACKGROUND: Residents are often the first point of contact in assessing patients who present with "flashes and floaters" in the emergency ophthalmology clinic. Most often, these symptoms are attributed to a posterior vitreous detachment (PVD), which may be associated with a retinal tear in up to 14% of cases. A proper peripheral retinal exam is, thus, imperative, and techniques other than scleral depression may not be sufficient. We conducted a cross-sectional survey of Canadian ophthalmology residents-in-training to understand the current resident practice patterns for examination of the peripheral retina...
October 2017: Canadian Journal of Ophthalmology. Journal Canadien D'ophtalmologie
https://www.readbyqxmd.com/read/28981383/systemic-moxifloxacin-in-streptococcus-viridans-endophthalmitis
#8
Ki Yup Nam, Sang Joon Lee, Jung Yeul Kim
PURPOSE: To evaluate the effectiveness of prophylactic systemic moxifloxacin in a rabbit model of Streptococcus viridans (S. viridans) endophthalmitis. METHODS: Animals (n=60) were divided into three groups. Intravenous moxifloxacin, vancomycin, normal saline was administered to 20 animals in each group and two hours later, 10(4) colony-forming units (CFU) of S. salivarius were intravitreally injected into the left eye. Intravenous antibiotics injection was repeated on days 1, 2, and 3 after inoculation...
October 5, 2017: Ocular Immunology and Inflammation
https://www.readbyqxmd.com/read/28978942/age-related-neurodegenerative-disease-associated-pathways-identified-in-retinal-and-vitreous-proteome-from-human-glaucoma-eyes
#9
Mehdi Mirzaei, Veer B Gupta, Joel M Chick, Todd M Greco, Yunqi Wu, Nitin Chitranshi, Roshana Vander Wall, Eugene Hone, Liting Deng, Yogita Dheer, Mojdeh Abbasi, Mahdie Rezaeian, Nady Braidy, Yuyi You, Ghasem Hosseini Salekdeh, Paul A Haynes, Mark P Molloy, Ralph Martins, Ileana M Cristea, Steven P Gygi, Stuart L Graham, Vivek K Gupta
Glaucoma is a chronic disease that shares many similarities with other neurodegenerative disorders of the central nervous system. This study was designed to evaluate the association between glaucoma and other neurodegenerative disorders by investigating glaucoma-associated protein changes in the retina and vitreous humour. The multiplexed Tandem Mass Tag based proteomics (TMT-MS3) was carried out on retinal tissue and vitreous humour fluid collected from glaucoma patients and age-matched controls followed by functional pathway and protein network interaction analysis...
October 4, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28974214/idiopathic-pigmented-vitreous-cyst-without-autofluorescence-a-case-report
#10
Jing Lu, Yan Luo, Lin Lu
BACKGROUND: Vitreous cysts are rare clinical findings and seldom cause visual disturbance. They are generally classified as congenital or acquired and are considered idiopathic when the etiology can not be determined. A previous electron microscopic observation on an idiopathic pigmented vitreous cyst has confirmed its pigment epithelial origin. However, the specific kind of pigment epithelium involved remains unclear. CASE PRESENTATION: A 39-year-old female presented with a round-shaped floater causing frequent visual disturbance in the left eye...
October 3, 2017: BMC Ophthalmology
https://www.readbyqxmd.com/read/28973045/the-expression-of-the-slit-robo-signal-in-the-retina-of-diabetic-rats-and-the-vitreous-or-fibrovascular-retinal-membranes-of-patients-with-proliferative-diabetic-retinopathy
#11
Weiyan Zhou, Hongya Wang, Wenzhen Yu, Wankun Xie, Min Zhao, Lvzhen Huang, Xiaoxin Li
PURPOSE: The Slit-Robo signal has an important role in vasculogenesis and angiogenesis. Our study examined the expression of Slit2 and its receptor, Robo1, in a rat model of streptozotocin-induced diabetes and in patients with proliferative diabetic retinopathy. METHODS: Diabetes was induced in male Sprague-Dawley rats via a single, intraperitoneal injection of streptozotocin. The rats were sacrificed 1, 3 or 6 months after the injection. The expression of Slit2 and Robo1 in retinal tissue was measured by real-time reverse transcription polymerase chain reaction (RT-PCR), and protein levels were measured by western blotting and immunohistochemistry...
2017: PloS One
https://www.readbyqxmd.com/read/28972682/presumed-post-traumatic-ocular-chondrosarcoma-with-intrathoracic-metastases-in-a-cat
#12
Matheus V L Moreira, Maria C de Andrade, Gustavo O Fulgêncio, Ingeborg M Langohr, Roselene Ecco
An indoor-only, 5-year-old, spayed female domestic shorthair cat presented for an ophthalmic examination of the left eye. An intraocular tumor with secondary glaucoma and blindness was diagnosed; the globe was enucleated and sent for histopathological examination. Gross examination revealed a solid white mass filling the entire vitreous space and replacing the iris and ciliary body. The lens and retina appeared to be similarly replaced by the neoplasm. Histological examination revealed a complete loss of the internal ocular structures, with a ruptured capsule as the only remnant of the lens within an extensive malignant mesenchymal neoplastic cell proliferation...
October 3, 2017: Veterinary Ophthalmology
https://www.readbyqxmd.com/read/28966549/myopia-induced-by-flickering-light-in-guinea-pig-eyes-is-associated-with-increased-rather-than-decreased-dopamine-release
#13
Xiumei Luo, Bing Li, Tao Li, Yue Di, Changyue Zheng, Shunmei Ji, Yuanyuan Ma, Jie Zhu, Xuefeng Chen, Xiaodong Zhou
PURPOSE: It is well known that the dopaminergic signaling pathway plays a pivotal role in the control of axial elongation. Much research has shown that retinal dopamine (DA) is decreased in experimental myopia, but the exact alteration in DA quantity underlying the myopia model induced by flickering light (FL) has not yet been fully elucidated. Therefore, in this study, we first attempted to prove the feasibility of the myopia model induced by FL and then to determine whether and how DA and its receptors changed in myopia induced by FL...
2017: Molecular Vision
https://www.readbyqxmd.com/read/28963579/pharmacokinetics-and-efficacy-of-intraocular-flurbiprofen
#14
S Blazaki, C Tsika, M Tzatzarakis, E Naoumidi, A Tsatsakis, C Tsatsanis, Miltiadis K Tsilimbaris
PURPOSE: Intravitreal delivery of non-steroidal anti-inflammatory drugs could be an effective way to treat macular edema caused by posterior segment inflammation. In this study, we evaluated the intravitreal bioavailability and anti-inflammatory efficacy of flurbiprofen in rabbit eyes. METHODS: For pharmacokinetics, 0.1 ml of 7.66 mg/ml flurbiprofen solution was injected intravitreally and vitreous drug levels were analyzed at specific time points using LC-MS technique...
September 29, 2017: Graefe's Archive for Clinical and Experimental Ophthalmology
https://www.readbyqxmd.com/read/28942431/uveitis-a-sight-threatening-disease-which-can-impact-all-systems
#15
REVIEW
Unnat Krishna, Deji Ajanaku, Alastair K Denniston, Theodora Gkika
Uveitis describes a group of conditions characterised by intraocular inflammation. The term uveitis technically describes inflammation of the uvea which comprises the iris, ciliary body and choroid, however now encompasses inflammation of adjacent intraocular structures such as the retina, vitreous and optic nerve. Uveitis is a significant cause of blindness worldwide, but its impact is generally underappreciated due to a lack of awareness and understanding of the condition among the public and most non-ophthalmic healthcare professionals...
September 23, 2017: Postgraduate Medical Journal
https://www.readbyqxmd.com/read/28928775/assessment-of-safety-and-functional-efficacy-of-stem-cell-based-therapeutic-approaches-using-retinal-degenerative-animal-models
#16
REVIEW
Tai-Chi Lin, Magdalene J Seiler, Danhong Zhu, Paulo Falabella, David R Hinton, Dennis O Clegg, Mark S Humayun, Biju B Thomas
Dysfunction and death of retinal pigment epithelium (RPE) and or photoreceptors can lead to irreversible vision loss. The eye represents an ideal microenvironment for stem cell-based therapy. It is considered an "immune privileged" site, and the number of cells needed for therapy is relatively low for the area of focused vision (macula). Further, surgical placement of stem cell-derived grafts (RPE, retinal progenitors, and photoreceptor precursors) into the vitreous cavity or subretinal space has been well established...
2017: Stem Cells International
https://www.readbyqxmd.com/read/28925755/toward-smart-design-of-retinal-drug-carriers-a-novel-bovine-retinal-explant-model-to-study-the-barrier-role-of-the-vitreoretinal-interface
#17
Karen Peynshaert, Joke Devoldere, Valérie Forster, Serge Picaud, Christian Vanhove, Stefaan C De Smedt, Katrien Remaut
Retinal gene delivery via intravitreal injection is hampered by various physiological barriers present in the eye of which the vitreoretinal (VR) interface represents the most serious hurdle. In this study, we present a retinal explant model especially designed to study the role of this interface as a barrier for the penetration of vectors into the retina. In contrast to all existing explant models, the developed model is bovine-derived and more importantly, keeps the vitreous attached to the retina at all times to guarantee an intact VR interface...
November 2017: Drug Delivery
https://www.readbyqxmd.com/read/28922351/estimation-of-the-mechanical-properties-of-the-eye-through-the-study-of-its-vibrational-modes
#18
M Á Aloy, J E Adsuara, P Cerdá-Durán, M Obergaulinger, J J Esteve-Taboada, T Ferrer-Blasco, R Montés-Micó
Measuring the eye's mechanical properties in vivo and with minimally invasive techniques can be the key for individualized solutions to a number of eye pathologies. The development of such techniques largely relies on a computational modelling of the eyeball and, it optimally requires the synergic interplay between experimentation and numerical simulation. In Astrophysics and Geophysics the remote measurement of structural properties of the systems of their realm is performed on the basis of (helio-)seismic techniques...
2017: PloS One
https://www.readbyqxmd.com/read/28913545/periostin-in-vitreoretinal-diseases
#19
REVIEW
Shigeo Yoshida, Takahito Nakama, Keijiro Ishikawa, Shintaro Nakao, Koh-Hei Sonoda, Tatsuro Ishibashi
Proliferative vitreoretinal diseases such as diabetic retinopathy, proliferative vitreoretinopathy (PVR), and age-related macular degeneration are a leading cause of decreased vision and blindness in developed countries. In these diseases, retinal fibro(vascular) membrane (FVM) formation above and beneath the retina plays an important role. Gene expression profiling of human FVMs revealed significant upregulation of periostin. Subsequent analyses demonstrated increased periostin expression in the vitreous of patients with both proliferative diabetic retinopathy and PVR...
September 14, 2017: Cellular and Molecular Life Sciences: CMLS
https://www.readbyqxmd.com/read/28904960/mystery-of-retinal-vein-occlusion-vasoactivity-of-the-vein-and-possible-involvement-of-endothelin-1
#20
REVIEW
Teruyo Kida
Retinal vein occlusion (RVO) is a common vascular disease of retina; however, the pathomechanism leading to RVO is not yet clear. In general, increasing age, hypertension, arteriosclerosis, diabetes mellitus, dyslipidemia, cardiovascular disorder, and cerebral stroke are systemic risk factors of RVO. However, RVO often occur in the unilateral eye and sometimes develop in young subjects who have no arteriosclerosis. In addition, RVO show different variations on the degrees of severity; some RVO are resolved without any treatment and others develop vision-threatening complications such as macular edema, combined retinal artery occlusion, vitreous hemorrhage, and glaucoma...
2017: BioMed Research International
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