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https://www.readbyqxmd.com/read/29453727/floating-flap-of-internal-limiting-membrane-in-myopic-macular-hole-surgery
#1
Kenji Yamashiro, Eri Kinoshita-Nakano, Toru Ota, Yoko Jingami, Isao Nakata, Hisako Hayashi
PURPOSE: To evaluate the surgical results of macular hole (MH) in patients with high myopia treated with pars plana vitrectomy (PPV) leaving the internal limiting membrane (ILM) flap floating in vitreous fluid at the edge of the MH. METHODS: Nine highly myopic eyes with MH of nine consecutive patients who underwent PPV were retrospectively evaluated. Three eyes were accompanied by retinal detachment (RD). ILM peeling was performed around the MH and some part of the ILM flap was left attached to the edge of the MH...
February 16, 2018: Graefe's Archive for Clinical and Experimental Ophthalmology
https://www.readbyqxmd.com/read/29453673/optical-coherence-tomography-angiography-discerns-preclinical-diabetic-retinopathy-in-eyes-of-patients-with-type-2-diabetes-without-clinical-diabetic-retinopathy
#2
Dan Cao, Dawei Yang, Zhongning Huang, Yunkao Zeng, Jun Wang, Yunyan Hu, Liang Zhang
AIMS: To investigate changes in retinal vascular plexuses and choriocapillaris in patients with type 2 diabetes mellitus (DM2) without diabetic retinopathy (DR) and healthy controls using optical coherence tomography angiography (OCTA). METHODS: A total of 71 DM2 and 67 healthy control subjects were included. All subjects underwent OCTA examination (RTVue-XR Avanti; Optovue, Fremont, CA, USA). Average vessel density in superficial capillary plexus (SCP), deep capillary plexus (DCP) and choriocapillaris, parafoveal vessel density in SCP and DCP, FAZ area (mm 2 ) in SCP, microaneurysms and capillary nonperfusion were taken into analysis...
February 16, 2018: Acta Diabetologica
https://www.readbyqxmd.com/read/29453250/retinal-chitosan-conjugates-effectively-deliver-active-chromophores-to-retinal-photoreceptor-cells-in-blind-mice-and-dogs
#3
Songqi Gao, Shirin Kahremany, Jianye Zhang, Beata Jastrzebska, Janice Querubin, Simon M Petersen-Jones, Krzysztof Palczewski
The retinoid (visual) cycle consists of a series of biochemical reactions needed to regenerate the visual chromophore, 11-cis-retinal and sustain vision. Genetic or environmental factors affecting chromophore production can lead to blindness. Using animal models that mimic human retinal diseases, we previously demonstrated that mechanism-based pharmacological interventions can maintain vision in otherwise incurable genetic diseases of the retina. Here, we report that after 9-cis-retinal administration to lecithin:retinol acyltransferase-deficient (Lrat-/-) mice, the drug was rapidly absorbed and then cleared within 1-2 h...
February 16, 2018: Molecular Pharmacology
https://www.readbyqxmd.com/read/29453223/tissue-engineering-of-retina-and-bruch-s-membrane-a-review-of-cells-materials-and-processes
#4
REVIEW
Yong Sheng Edgar Tan, Pu Jiang Shi, Chang-J Choo, Augustinus Laude, Wai Yee Yeong
The biological, structural and functional configuration of Bruch's membrane (BM) is significantly relevant to age-related macular degeneration (AMD) and other chorioretinal diseases, and AMD is one of the leading causes of blindness in the elderly worldwide. The configuration may worsen along with the ageing of retinal pigment epithelium and BM that finally leads to AMD. Thus, the scaffold-based tissue-engineered retina provides an innovative alternative for retinal tissue repair. The cell and material requirements for retinal repair are discussed including cell sheet engineering, decellularised membrane and tissue-engineered membranes...
February 16, 2018: British Journal of Ophthalmology
https://www.readbyqxmd.com/read/29453017/-retinal-arterial-macroaneurysm-and-hypertension-importance-of-the-multidisciplinary-approach
#5
Á Olate-Pérez, M Bóveda-García, A Gargallo-Benedicto, D Hernández-Pérez, A Duch-Samper
No abstract text is available yet for this article.
February 13, 2018: Semergen
https://www.readbyqxmd.com/read/29452902/retina-dose-as-a-predictor-for-visual-acuity-loss-in-106-ru-eye-plaque-brachytherapy-of-uveal-melanomas
#6
Gerd Heilemann, Lukas Fetty, Matthias Blaickner, Nicole Nesvacil, Martin Zehetmayer, Dietmar Georg, Roman Dunavoelgyi
BACKGROUND AND PURPOSE: To evaluate the retina dose as a risk factor associated with loss of visual acuity (VA) in 106 Ru plaque brachytherapy. MATERIAL/METHODS: 45 patients receiving 106 Ru plaques brachytherapy (median follow-up 29.5 months) were included in this study. An in-house developed treatment planning system with Monte Carlo based dose calculation was used to perform treatment planning and dose calculation. Risk factors associated with loss of VA were evaluated using the Cox proportional hazards models, Kaplan-Meier estimates and Pearson correlation coefficients...
February 13, 2018: Radiotherapy and Oncology: Journal of the European Society for Therapeutic Radiology and Oncology
https://www.readbyqxmd.com/read/29452885/somatolactogens-and-diabetic-retinopathy
#7
REVIEW
Kevin Christian Bermea, Alejandro Rodríguez-García, Andrew Tsin, Hugo Alberto Barrera-Saldaña
IMPORTANCE: Diabetic retinopathy (DR) is one of the most common of all diabetic complications. The number of people with DR in the United States is expected to increase to 16 million by 2050. DR is the leading cause of blindness among working-age adults in many different countries, including the United States. In later DR stages, neovascularization is associated with extensive retinal capillary non-perfusion and vitreo-proliferation leading to retinal detachment. This neovascularization is orchestrated by an imbalance of growth factors in the retina from which somatolactogens (pituitary growth hormone, GH-N; placental growth hormone, GH-V; prolactin, PRL; and placental lactogen, PL, also referred as chorionic somatomammotropin, CSH), may play an important role...
February 6, 2018: Growth Hormone & IGF Research
https://www.readbyqxmd.com/read/29452570/s1p-transporter-spns2-regulates-proper-postnatal-retinal-morphogenesis
#8
Chao Fang, Ganlan Bian, Pan Ren, Jie Xiang, Jun Song, Caiyong Yu, Qian Zhang, Ling Liu, Kun Chen, Fangfang Liu, Kun Zhang, Chunfeng Wu, Ruixia Sun, Dan Hu, Gong Ju, Jian Wang
Spinster homolog 2 (SPNS2) is the membrane transporter of sphingosine-1-phosphate (S1P), and it participates in several physiologic processes by activating different S1P receptors (S1PRs). However, its functions in the nervous system remain largely unclear. We explored the important role of SPNS2 in the process of retinal morphogenesis using a spns2-deficient rat model. In the absence of the functional SPNS2 transporter, we observed progressively aggravating laminar disorganization of the epithelium at the postnatal stage of retinal development...
February 8, 2018: FASEB Journal: Official Publication of the Federation of American Societies for Experimental Biology
https://www.readbyqxmd.com/read/29452453/-personalized-ophthalmology-induced-pluripotent-stem-cells-for-in-vitro-modelling-of-retinal-degenerative-diseases
#9
Caroline Brandl, Bernhard H F Weber
Today, the search for therapeutic options to treat retinal degeneration often relies on an in-depth understanding of the underlying pathological events. Alternatively, it is conceivable to search, in an undirected screening approach, for chemical compounds affecting disease outcome. For both approaches, there is an urgent need for in vitro and, ideally, in vivo disease models that adequately reflect the site of pathology. Currently available animal models possess limitations as they often develop only defined aspects of disease...
February 16, 2018: Klinische Monatsblätter Für Augenheilkunde
https://www.readbyqxmd.com/read/29452106/nerve-fibre-layer-degeneration-and-retinal-ganglion-cell-loss-long-term-after-optic-nerve-crush-or-transection-in-adult-mice
#10
M C Sánchez-Migallón, F J Valiente-Soriano, M Salinas-Navarro, F M Nadal-Nicolás, M Jiménez-López, M Vidal-Sanz, M Agudo-Barriuso
We have investigated the long term effects of two different models of unilateral optic nerve (ON) lesion on retinal ganglion cells (RGCs) and their axons, in the injured and contralateral retinas of adult albino mice. Intact animals were used as controls. The left ON was intraorbitally crushed or transected at 0.5 mm from the optic disk and both retinas were analyzed at 2, 3, 5, 7, 14, 30, 45 or 90 days after injury. RGCs were immunoidentified with anti-Brn3a, and their axons with anti-highly phosphorylated axonal neurofilament subunit H (pNFH)...
February 13, 2018: Experimental Eye Research
https://www.readbyqxmd.com/read/29452101/socs3-deficiency-in-myeloid-cells-promotes-retinal-degeneration-and-angiogenesis-through-arginase-1-up-regulation-in-experimental-autoimmune-uveoretinitis
#11
Mei Chen, Jiawu Zhao, Imran Ha Ali, Stephen Marry, Josy Augustine, Mohajeet Bhuckory, Aisling Lynch, Adrien Kissenpfennig, Heping Xu
The suppressor of cytokine signalling protein 3 (SOCS3) critically controls immune cell activation, although its role in macrophage polarization and function remains controversial. Using experimental autoimmune uveoretinitis (EAU) as a model, we show that inflammation-mediated retinal degeneration is exaggerated and retinal angiogenesis is accelerated in mice with SOCS3 deficiency in myeloid cells (LysM Cre/+ SOCS3 fl/fl ). At the acute stage of EAU, the population of infiltrating neutrophils was increased and the population of macrophages decreased in LysM Cre/+ SOCS3 fl/fl mice compared to that in WT mice...
February 13, 2018: American Journal of Pathology
https://www.readbyqxmd.com/read/29451998/predicting-the-integrated-visual-field-with-wide-scan-optical-coherence-tomography-in-glaucoma-patients
#12
Masaaki Yoshida, Shiho Kunimatsu-Sanuki, Kazuko Omodaka, Toru Nakazawa
PURPOSE: This study aimed to calculate a predicted integrated visual field (IVF) based on predicted monocular visual fields (MVFs) derived, with a new method, from wide-scan optical coherence tomography (OCT) data. MATERIALS AND METHODS: Visual field testing used the central (6 × 4) 24 points of the Humphrey Field Analyzer 24-2 program. OCT scans of a corresponding retinal area, centered on the fovea, were divided into a 6 × 4 grid. The thickness of the macular retinal nerve fiber layer (mRNFL), ganglion cell layer + inner plexiform layer (GCIPL), and mRNFL + GCIPL (GCC) was measured in each grid area...
February 16, 2018: Current Eye Research
https://www.readbyqxmd.com/read/29451996/foveal-avascular-zone-area-changes-analyzed-using-oct-angiography-after-successful-rhegmatogenous-retinal-detachment-repair
#13
Je Moon Woo, Yo Sep Yoon, Jong Eun Woo, Jung Kee Min
PURPOSE: To investigate foveal avascular zone (FAZ) area after surgery in patients with rhegmatogenous retinal detachment (RRD) that involved or uninvolved the macula, and to evaluate the correlation between FAZ area and visual outcomes using swept-source optical coherence tomography angiography (OCTA). MATERIALS AND METHODS: This retrospective case-control study included 34 eyes (34 patients) with recent onset RRD that were successfully repaired with a single, uncomplicated surgical procedure (pars plana vitrectomy with gas tamponade)...
February 16, 2018: Current Eye Research
https://www.readbyqxmd.com/read/29451992/optical-coherence-tomography-angiography-of-the-peripapillary-retina-in-normal-tension-glaucoma-and-chronic-nonarteritic-anterior-ischemic-optic-neuropathy
#14
Rodolfo Mastropasqua, Luca Agnifili, Enrico Borrelli, Vincenzo Fasanella, Lorenza Brescia, Luca Di Antonio, Leonardo Mastropasqua
PURPOSE: To analyze the retinal radial peripapillary capillary (RPC) network in normal-tension glaucoma (NTG) and nonarteritic anterior ischemic optic neuropathy (NAION) eyes using optical coherence tomography angiography (OCTA). MATERIAL AND METHODS: Twenty-two patients with NTG, 22 patients with unilateral chronic NAION, and 23 age-matched controls were enrolled. Patients underwent OCTA to obtain en face angiograms of the peripapillary region. The main outcome measures were as follows: (1) the whole en face image perfusion density (WPD) and (2) the circumpapillary perfusion density (CPD)...
February 16, 2018: Current Eye Research
https://www.readbyqxmd.com/read/29451852/delta-opioids-neuroprotective-roles-in-preclinical-studies
#15
Shahid Husain
Since ancient times, opioids have been used clinically and abused recreationally. In the early stages (about 1,000 AD) of opium history, an Arab physician, Avicenna, administered opioids to control diarrhea and eye diseases. 1 Opioids have very strong pain relieving properties and they also regulate numerous cellular responses. Opioid receptors are expressed throughout the body, including the nervous system, heart, lungs, liver, gastrointestinal tract, and retina. 2-6 Delta opioid receptors (DORs) are a very attractive target from the perspective of both receptor function and their therapeutic potential...
January 2018: Journal of Ocular Pharmacology and Therapeutics
https://www.readbyqxmd.com/read/29451602/synthesis-and-cytotoxic-evaluation-of-1h-1-2-3-triazol-1-ylmethyl-2-3-dihydronaphtho-1-2-b-furan-4-5-diones
#16
Ingrid C Chipoline, Evelyne Alves, Paola Branco, Leticia V Costa-Lotufo, Vitor F Ferreira, Fernando C DA Silva
The 1,2-naphthoquinone compound was previously considered active against solid tumors. Moreover, glycosidase inhibitors such as 1,2,3-1H triazoles has been pointed out as efficient compounds in anticancer activity studies. Thus, a series of eleven 1,2-naphthoquinones tethered in C2 to 1,2,3-1H-triazoles 9a-k were designed, synthesized and their cytotoxic activity evaluated using HCT-116 (colon adenocarcinoma), MCF-7 (breast adenocarcinoma) and RPE (human nontumor cell line from retinal epithelium). The chemical synthesis was performed from C-3 allylation of lawsone followed by iodocyclization with subsequent nucleophilic displacement with sodium azide and, finally, the 1,3-dipolar cycloaddition catalyzed by Cu(I) with terminal alkynes led to the formation of 1H-1,2,3-Triazol-1-ylmethyl-2,3-dihydronaphtho[1,2-b]furan-4,5-diones in good yields...
February 15, 2018: Anais da Academia Brasileira de Ciências
https://www.readbyqxmd.com/read/29451218/pten-knockdown-with-the-y444f-mutant-aav2-vector-promotes-axonal-regeneration-in-the-adult-optic-nerve
#17
Zheng-Ru Huang, Hai-Ying Chen, Zi-Zhong Hu, Ping Xie, Qing-Huai Liu
The lack of axonal regeneration is the major cause of vision loss after optic nerve injury in adult mammals. Activating the PI3K/AKT/mTOR signaling pathway has been shown to enhance the intrinsic growth capacity of neurons and to facilitate axonal regeneration in the central nervous system after injury. The deletion of the mTOR negative regulator phosphatase and tensin homolog (PTEN) enhances regeneration of adult corticospinal neurons and ganglion cells. In the present study, we used a tyrosine-mutated (Y444F) AAV2 vector to efficiently express a short hairpin RNA (shRNA) for silencing PTEN expression in retinal ganglion cells...
January 2018: Neural Regeneration Research
https://www.readbyqxmd.com/read/29451203/a-growing-field-the-regulation-of-axonal-regeneration-by-wnt-signaling
#18
REVIEW
Armando L Garcia, Adanna Udeh, Karthik Kalahasty, Abigail S Hackam
The canonical Wnt/β-catenin pathway is a highly conserved signaling cascade that plays critical roles during embryogenesis. Wnt ligands regulate axonal extension, growth cone guidance and synaptogenesis throughout the developing central nervous system (CNS). Recently, studies in mammalian and fish model systems have demonstrated that Wnt/β-catenin signaling also promotes axonal regeneration in the adult optic nerve and spinal cord after injury, raising the possibility that Wnt could be developed as a therapeutic strategy...
January 2018: Neural Regeneration Research
https://www.readbyqxmd.com/read/29450624/-intraoperative-optical-coherence-tomography-in-explorative-vitrectomy-in-patients-with-vitreous-haemorrhage-a-case-series
#19
D Heinrich, S Bohnacker, M A Nasseri, N Feucht, C P Lohmann, M Maier
BACKGROUND: High-resolution spectral domain optical coherence tomography (SD-OCT) is a gold standard technique for diagnosis, management and monitoring of patients with vitreoretinal diseases. Preoperative diagnostics for evaluation of intraocular and retinal status in patients with vitreous haemorrhage are limited, thus final therapeutic decisions can only be made during explorative vitrectomy. We evaluated the use of intraoperative SD-OCT (iSD-OCT) as a real-time additional diagnostic tool during explorative vitrectomy in patients with vitreous haemorrhage...
February 15, 2018: Der Ophthalmologe: Zeitschrift der Deutschen Ophthalmologischen Gesellschaft
https://www.readbyqxmd.com/read/29450622/comparison-of-retinal-microvascular-changes-in-eyes-with-high-tension-glaucoma-or-normal-tension-glaucoma-a-quantitative-optic-coherence-tomography-angiographic-study
#20
Huan Xu, Ruyi Zhai, Yuan Zong, Xiangmei Kong, Chunhui Jiang, Xinghuai Sun, Yi He, Xiqi Li
PURPOSE: The aim of this study is to determine and compare the changes in the retinal vasculature in eyes with high-tension glaucoma (HTG) or normal-tension glaucoma (NTG). METHODS: The right eyes of 43 HTG subjects, 33 NTG subjects, and 51 age- and sex-matched normal subjects were included in this cross-sectional study. Signals were projected from the internal limiting membrane to retinal pigment epithelium. The retinal perfused vessel densities in the peripapillary and parafoveal regions were measured automatically with optic coherence tomography angiography and the split-spectrum amplitude-decorrelation angiography algorithm...
February 15, 2018: Graefe's Archive for Clinical and Experimental Ophthalmology
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