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Nicholas R Andreychuk, Tara Dickie, David J H Emslie, Hilary A Jenkins
Palladium-catalyzed coupling of 1-adamantylamine (2 equiv.) with 4,5-dibromo-2,7-di-tert-butyl-9,9-dimethylxanthene afforded the proligand 4,5-bis(1-adamantylamino)-2,7-di-tert-butyl-9,9-dimethylxanthene, H2 [XAd] (1), which upon deprotonation with excess KH or KCH2 Ph in THF or dme generated [{K(THF)3 }2 (XAd)] (2a) and [K2 (XAd)(dme)] (2b). Subsequent reaction of in situ generated 2a or 2b with [ThCl4 (dme)2 ] yielded [(XAd)ThCl4 K2 ]·x(dme) (3; x = 0.5-2), which reacted with 2 equiv. of LiCH2 SiMe3 or K[allylTMS ] to afford the bis(hydrocarbyl) complexes [(XAd)Th(CH2 SiMe3 )2 (THF)] (4) and [(XAd)Th(η3 -allylTMS )2 ] {5; allylTMS = 1-(SiMe3 )C3 H4 }...
March 15, 2018: Dalton Transactions: An International Journal of Inorganic Chemistry
Lu Wang, Bo Jiang, Per Erik Vullum, Ann Mari Svensson, Andreas Erbe, Sverre M Selbach, Huailiang Xu, Fride Vullum-Bruer
A rechargeable Mg battery where the capacity mainly originates from reversible reactions occurring at the electrode/electrolyte interface efficiently avoids the challenge of sluggish Mg intercalation encountered in conventional Mg batteries. The interfacial reactions in a cell based on microwave exfoliated graphite oxide (MEGO) as the cathode, and all phenyl complex (APC) as electrolyte, are by quantitative kinetics analysis identified as a combination of diffusion-controlled reactions involving ether solvents (esols) and capacitive processes...
March 14, 2018: ACS Nano
Tracy W Krick, Neil M Bressler
PURPOSE OF REVIEW: To present some recent clinically relevant results from Diabetic Retinopathy Clinical Research (DRCR) Network trials that may guide management of diabetic macular edema (DME) or proliferative diabetic retinopathy (PDR). RECENT FINDINGS: Among eyes with DME and visual acuity 20/50 or worse, aflibercept, on average, had greater improvement in visual acuity over 2 years compared with bevacizumab or ranibizumab. Aflibercept is associated with higher rates of improvements in diabetic retinopathy severity among eyes with PDR and vision-impairing DME at baseline compared with bevacizumab or ranibizumab...
March 9, 2018: Current Opinion in Ophthalmology
Justis P Ehlers, Kevin Wang, Rishi P Singh, Amy S Babiuch, Andrew P Schachat, Alex Yuan, Jamie L Reese, Laura Stiegel, Sunil K Srivastava
Purpose: To assess the efficacy of ranibizumab for persistent diabetic macular edema (DME) previously treated with bevacizumab and compare monthly vs treat-and-extend (TAE) dosing. Design: 12-month, open-label, prospective randomized comparative dosing study. Participants: 27 participants with persistent foveal-involving DME recently treated with bevacizumab. Methods: All subjects were to receive three initial monthly 0...
March 2018: Ophthalmology Retina
Fatih Yenihayat, Berna Özkan, Murat Kasap, V Levent Karabaş, Nil Güzel, Gürler Akpınar, Dilara Pirhan
PURPOSE: To determine the cytokine levels in vitreous samples of diabetic macular edema (DME) patients in comparison with nondiabetic patients, and to evaluate the effect of subretinal fluid on the cytokine levels of vitreous samples. METHODS: In this prospective case-control study, 11 eyes of 11 patients with DME and subretinal fluid, 11 eyes of 11 patients with DME without subretinal fluid, and 14 eyes of 14 patients who had undergone vitreoretinal surgery for the epiretinal membrane or a macular hole (control group) were evaluated...
March 9, 2018: International Ophthalmology
Roxane J Hillier, Elvis Ojaimi, David T Wong, Michael Y K Mak, Alan R Berger, Radha P Kohly, Peter J Kertes, Farzin Forooghian, Shelley R Boyd, Kenneth Eng, Filiberto Altomare, Louis R Giavedoni, Rosane Nisenbaum, Rajeev H Muni
Importance: Variability in response to anti-vascular endothelial growth factor (VEGF) treatment in diabetic macular edema (DME) remains a significant clinical challenge. Biomarkers could help anticipate responses to anti-VEGF therapy. Objectives: To investigate aqueous humor cytokine level changes in response to intravitreal ranibizumab therapy for the management of DME, and to determine the association between baseline aqueous levels and anatomic response. Design, Setting, and Participants: In this prospective multicenter cohort study, 49 participants with diabetes mellitus complicated by center-involving DME, with a central subfield thickness of 310 μm or greater on spectral-domain optical coherence tomography (SD-OCT), were recruited from December 22, 2011, to June 13, 2013 and statistical analysis were performed from March 1, 2017, to June 1, 2017...
March 8, 2018: JAMA Ophthalmology
Ramachandran Rajalakshmi, Radhakrishnan Subashini, Ranjit Mohan Anjana, Viswanathan Mohan
OBJECTIVES: To assess the role of artificial intelligence (AI)-based automated software for detection of diabetic retinopathy (DR) and sight-threatening DR (STDR) by fundus photography taken using a smartphone-based device and validate it against ophthalmologist's grading. METHODS: Three hundred and one patients with type 2 diabetes underwent retinal photography with Remidio 'Fundus on phone' (FOP), a smartphone-based device, at a tertiary care diabetes centre in India...
March 9, 2018: Eye
Yusuke Kameda, Akira Hirose, Tomohiro Iida, Yasuko Uchigata, Shigehiko Kitano
Purpose: To report a case of a giant retinal pigment epithelial (RPE) tear associated with fluid overload in a patient with diabetic macular edema (DME) and kidney disease. Observations: A 60-year-old man with type 2 diabetes mellitus and end-stage diabetic kidney disease who had gained weight because of fluid overload complained of a visual disturbance in the left eye that had started a few days earlier. The left fundus showed a RPE defect in two temporal quadrants under an extensive serous retinal detachment (SRD) with exacerbation of the original DME...
April 2017: American Journal of Ophthalmology Case Reports
Matias Iglicki, Dinah Zur, Catharina Busch, Mali Okada, Anat Loewenstein
PURPOSE: Intravitreal anti-vascular endothelial growth factor agents have been shown to reduce diabetic retinopathy (DR) progression; data on the effects of intravitreal corticosteroids on modifying disease severity are limited. This study evaluates the long-term effect of intravitreal dexamethasone implant (DEX) on the severity and progression of non-proliferative DR (NPDR). METHODS: This was a retrospective cohort study. Sixty eyes from 60 consecutive patients with NPDR and diabetic macular edema (DME) treated with dexamethasone implant (DEX group) and 49 eyes from consecutive 49 patients without DME requiring observation only...
March 1, 2018: Acta Diabetologica
Rafiq A Rather, Madhulika Bhagat
Cancer is a genetic disease characterized by unregulated growth and dissemination of malignantly transformed neoplastic cells. The process of cancer development goes through several stages of biochemical and genetic alterations in a target cell. Several dietary alkaloids have been found to inhibit the molecular events and signaling pathways associated with various stages of cancer development and therefore are useful in cancer chemoprevention. Cancer chemoprevention has long been recognized as an important prophylactic strategy to reduce the burden of cancer on health care system...
2018: Frontiers in Cell and Developmental Biology
Masahiro Okamoto, Mariko Yamashita, Nahoko Ogata
PURPOSE: To determine the effects of an intravitreal injection of ranibizumab (IVR) on the choroidal structure and blood flow in eyes with diabetic macular edema (DME). METHODS: Twenty-eight consecutive patients with DME who received an IVR and 20 non-diabetic, age-matched controls were followed for 1 month. The eyes with DME were divided into those with prior panretinal photocoagulation (PRP, n = 16) and those without prior PRP (no-PRP, n = 12). The enhanced depth imaging optical coherence tomography (EDI-OCT) scans and Niblack's image binarization were performed to determine the choroidal structure...
March 1, 2018: Graefe's Archive for Clinical and Experimental Ophthalmology
Daniela Claessens, Alexander K Schuster
BACKGROUND: Amsler Test is the standard used to detect metamorphopsia. To develop a tool to quantitatively measure and monitor metamorphopsia, the computer-based test "AMD - A Metamorphopsia Detector® " was developed. This study was performed to examine the correlation of metamorphopsia index (MI) and central retinal thickness (CRT) in exsudative age-related macular degeneration (AMD) and diabetic macular edema (DME). MATERIAL AND METHODS: Sixty-six eyes of 66 patients, DME: 19 (11 males, 8 females; age 42 - 76); AMD: 47 (13 male, 34 female; age 56 - 93) were included in this convenient sample study and classified as having or not having macular edema (central 500 µm, Cirrus HD-OCT)...
February 28, 2018: Klinische Monatsblätter Für Augenheilkunde
Kaixiang Lei, Chenchen Wang, Luojia Liu, Yuwen Luo, Chaonan Mu, Fujun Li, Jun Chen
Potassium-ion batteries (KIBs) are plagued by materials for reversible accommodation of the large-sized K+. Here, the bulk Bi anode is presented in combination with the dimethoxyethane-(DME) based electrolyte to deliver a remarkable capacity of ~400 mAh g-1 and long cycle stability with three distinct two-phase reactions of Bi↔KBi2↔K3Bi2↔K3Bi. These are ascribed to the gradually developed three-dimensional (3D) porous networks of Bi, which realizes fast kinetics and tolerance of its volume change during potassiation and depotassiation...
February 28, 2018: Angewandte Chemie
Rui Shi, Lei Zhao, Feng Wang, Fen Liu, Zhuo Chen, Rong Li, Yang Liu, Rong Lin
AIM: To clarify this controversy and to provide evidence for application of lipid lowering agents in treatment of diabetic retinopathy (DR). METHODS: We searched the databases of PubMed, Embase and Cochrane Library Central Register of Controlled Trials (CENTRAL) and abstracts from main annual meetings up to January 1, 2017. Google scholar and were also searched for unpublished relevant studies. We included randomized controlled trials (RCTs) that studied lipid-lowering agents in type 1 or type 2 diabetes in this Meta-analysis...
2018: International Journal of Ophthalmology
Andrijana Kopić, Dubravka Biuk, Josip Barać, Maja Vinković, Tvrtka Benašić, Vlatko Kopić
Over the past decade, intravitreal injections of anti-VEGF agents have been widely used and intensively developed as a treatment option for many ophthalmological indications. Due to its availability and low cost, the most frequently used anti-VEGF agent is bevacizumab. This type of therapy is often indicated in patients with exudative age-related macular degeneration (ARMD) and diabetic macular edema (DME). If, in addition to these two conditions, patients have a diagnosis of primary open angle glaucoma (POAG), they also present with optic nerve head (ONH) retinal nerve fiber layer (RNFL) thinning...
September 2017: Acta Clinica Croatica
M Echchakery, J Nieto, S Boussaa, N El Fajali, S Ortega, K Souhail, H Aajly, C Chicharro, E Carrillo, J Moreno, A Boumezzough
In Morocco, visceral leishmaniasis (VL) is a parasitic disease caused by the flagellated protozoan parasite Leishmania infantum. L. infantum is transmitted by the bite of female phlebotomine sandflies, and its main reservoir hosts are domestic dogs. Asymptomatic infection with L. infantum is more frequent than clinically apparent disease. In HIV-infected patients, the risk of clinical VL is increased due to immunosuppression that may reactivate latent infections. However, coinfected subjects do not necessarily develop VL and may remain as asymptomatic carriers depending on their immune status...
February 24, 2018: Parasitology Research
Hiroko Terasaki, Kunihiko Shiraki, Masahito Ohji, Carola Metzig, Thomas Schmelter, Oliver Zeitz, Olaf Sowade, Masato Kobayashi, Robert Vitti, Alyson Berliner, Fumio Shiraga
PURPOSE: To evaluate the efficacy and safety of intravitreal aflibercept injection (IAI) in Japanese patients with diabetic macular edema (DME). METHODS: VIVID-DME was a Phase 3 study comprising patients with DME randomized 1:1:1 to IAI 2 mg every 4 weeks (2q4), IAI 2 mg every 4 weeks until Week 16 then 8-week dosing (2q8), and laser. A total of 403 patients (76 Japanese) were included in this study. VIVID-Japan (72; all Japanese patients) was a nonrandomized, open-label study comprising Japanese patients with DME receiving IAI 2q4 until Week 16, then 2q8...
February 21, 2018: Retina
Shengnan Xiang, Melika Sarem, Samveg Shah, V Prasad Shastri
Nanomedicines can be taken up by cells via nonspecific and dynamin-dependent (energy-dependent) clathrin and caveolae-mediated endocytosis. While significant effort has focused on targeting pathway-specific transporters, the role of nanobiophysics in the cell lipid bilayer nanoparticle uptake pathway remains largely unexplored. In this study, it is demonstrated that stiffness of lipid bilayer is a key determinant of uptake of liposomes by mammalian cells. Dynamin-mediated endocytosis (DME) of liposomes is found to correlate with its phase behavior, with transition toward solid phase promoting DME, and transition toward fluidic phase resulting in dynamin-independent endocytosis...
February 20, 2018: Small
Tomoaki Murakami, Kiyoshi Suzuma, Akihito Uji, Shin Yoshitake, Yoko Dodo, Masahiro Fujimoto, Tatsuya Yoshitake, Yuko Miwa, Nagahisa Yoshimura
PURPOSE: To investigate the association between the characteristics of foveal cystoid spaces and short-term responsiveness to ranibizumab treatment for diabetic macular edema (DME) at 3 months from the initial injection. METHODS: We retrospectively reviewed 66 eyes of 61 patients with center-involved DME who received three consecutive ranibizumab injections and following as-needed administrations. We evaluated the relationship between visual improvement at 3 months and the preoperative optical coherence tomography (OCT) parameters including hyperreflective foci, heterogeneous OCT reflectivity, mean levels of OCT reflectivity and height of foveal cystoid spaces...
February 19, 2018: Japanese Journal of Ophthalmology
Richard S Beaser, Wendy A Turell, Alexandra Howson
Nonproliferative and proliferative diabetic retinopathy (DR) are common, progressive complications of diabetes with a rising incidence. Over time, patients with nonproliferative DR may progress to more advanced stages of DR, with an increased risk of vision-threatening conditions such as diabetic macular edema (DME). DME is the most frequent cause of vision loss in patients with diabetes and eventually can lead to blindness. Early-stage DR is asymptomatic; therefore, a coordinated management strategy is crucial to prevent or limit the progression of DR...
February 2018: Diabetes Spectrum: a Publication of the American Diabetes Association
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