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https://www.readbyqxmd.com/read/28094352/star-shaped-copolymer-grafted-pei-and-redv-as-a-gene-carrier-to-improve-migration-of-endothelial-cells
#1
Juan Lv, Xuefang Hao, Qian Li, Mary Akpanyung, Abdelilah Nejjari, Agnaldo Luis Neve, Xiangkui Ren, Yakai Feng, Changcan Shi, Wencheng Zhang
In this work, a biodegradable star-shaped copolymer poly(lactide-co-3(S)-methyl-morpholine-2,5-dione)6 (Star-(PLMD)6) was synthesized via ring-opening polymerization (ROP), and subsequently a gene carrier Star-PLMD-g-PEI-g-PEG-CREDVW was prepared by grafting polyethyleneimine (PEI), polyethylene glycol (PEG) and targeting peptide REDV onto Star-(PLMD)6. This gene carrier could form stable micelles to condense pEGFP-ZNF580 through electrostatic interaction. The resulting complexes were biocompatible and showed high efficiency in gene delivery...
January 17, 2017: Biomaterials Science
https://www.readbyqxmd.com/read/28088487/adenosine-receptors-and-caffeine-in-retinopathy-of-prematurity
#2
REVIEW
Jiang-Fan Chen, Shuya Zhang, Rong Zhou, Zhenlang Lin, Xiaohong Cai, Jing Lin, Yuqin Huo, Xiaoling Liu
Retinopathy of prematurity (ROP) is a major cause of childhood blindness in the world and is caused by oxygen-induced damage to the developing retinal vasculature, resulting in hyperoxia-induced vaso-obliteration and subsequent delayed retinal vascularization and hypoxia-induced pathological neovascularization driven by vascular endothelial growth factor (VEGF) signaling pathway in retina. Current anti-VEGF therapy has shown some effective in a clinical trial, but is associated with the unintended effects on delayed eye growth and retinal vasculature development of preterm infants...
January 11, 2017: Molecular Aspects of Medicine
https://www.readbyqxmd.com/read/28087723/prophylactic-propranolol-for-prevention-of-rop-and-visual-outcome-at-1%C3%A2-year-prerop-trial
#3
Kishore Pratap Sanghvi, Nandkishor S Kabra, Phalguni Padhi, Umesh Singh, Swarup Kumar Dash, Bhupendra S Avasthi
OBJECTIVE: To evaluate the role of prophylactic propranolol in the prevention of retinopathy of prematurity (ROP) in infants ≤32 weeks of gestational age and their visual outcome at 1 year of corrected gestational age. DESIGN: Randomised double blind placebo controlled trial, parallel group nrolment with allocation ratio of 1:1. SETTINGS: Two level III neonatal intensive care units. PARTICIPANTS: 109 preterm neonates of ≤32 weeks of gestation with postnatal age ≤8 days old...
January 13, 2017: Archives of Disease in Childhood. Fetal and Neonatal Edition
https://www.readbyqxmd.com/read/28087400/plus-disease-in-retinopathy-of-prematurity-diagnostic-trends-in-2016-vs-2007
#4
Chace Moleta, J Peter Campbell, Jayashree Kalpathy-Cramer, Rv Paul Chan, Susan Ostmo, Karyn Jonas, Michael F Chiang
PURPOSE: To identify any temporal trends in the diagnosis of plus disease in retinopathy of prematurity (ROP) by experts. DESIGN: Reliability analysis METHODS: ROP experts were recruited in 2007 and 2016 to classify 34 wide-field fundus images of ROP as plus, pre-plus, or normal, coded as "3," "2," and "1" respectively in the database. The main outcome was the average calculated score for each image in each cohort. Secondary outcomes included correlation on the relative ordering of the images in 2016 versus 2007, inter-expert agreement, and intra-expert agreement RESULTS: The average score for each image was higher for 30/34 (88%) images in 2016 compared to 2007, influenced by fewer images classified as normal (P<0...
January 10, 2017: American Journal of Ophthalmology
https://www.readbyqxmd.com/read/28087247/activity-of-von-willebrand-factor-and-levels-of-vwf-cleaving-protease-adamts13-in-preterm-and-full-term-neonates
#5
T Strauss, N Elisha, B Ravid, N Rosenberg, A Lubetsky, S Levy-Mendelovich, I Morag, U Nowak Göttl, G Kenet
Von Willebrand Factor (VWF) has a central role in primary hemostasis. Its biological activity is related to the size of VWF multimers, spontaneously binding to platelets and inducing circulating microthrombi formation. This process is down-regulated by the VWF cleaving protease ADAMTS13 (A Disintegrin and Metalloprotease with ThromboSpondin motif). To date, information regarding the levels of ADAMTS13 in neonates and preterm infants is scarce. Our aim was to study ADAMTS13, VWF antigen (Ag) and Ristocetin cofactor (RiCof) activity in neonates and evaluate potential correlations with perinatal complications...
December 29, 2016: Blood Cells, Molecules & Diseases
https://www.readbyqxmd.com/read/28079370/substituted-polyesters-by-thiol-ene-modification-rapid-diversification-for-therapeutic-protein-stabilization
#6
Emma M Pelegri-O'Day, Samantha J Paluck, Heather D Maynard
Many proteins, especially those used as therapeutics, are unstable to storage and shipping temperatures, leading to increased costs in research and industry. Therefore, the design and synthesis of novel stabilizers is an important area of investigation. Herein we report new degradable polymers that stabilize proteins to environmental stressors such as refrigeration and elevated temperature. Specifically, polycaprolactones with different pendant groups were synthesized and surveyed for their ability to stabilize an important therapeutic protein to storage and shipping conditions...
January 12, 2017: Journal of the American Chemical Society
https://www.readbyqxmd.com/read/28070891/a-rop2-ric1-pathway-fine-tunes-microtubule-reorganisation-for-salt-tolerance-in-arabidopsis
#7
Changjiang Li, Hanmei Lu, Wei Li, Ming Yuan, Ying Fu
The biphasic reorganisation of microtubules induced by salt stress is required for Arabidopsis survival under high salinity conditions, however, the underlying regulatory mechanism is poorly understood. In this study, we demonstrate that microtubule associated protein RIC1 has a negative effect on the microtubule reassembly phase under salt stress, and activated ROP2 contributes to the microtubule reorganisation at least partially by releasing the inhibitory effect of RIC1 on microtubule recovery. Our finding not only reveals a new regulatory mechanism for biphasic microtubule reorganisation under salt stress but also the importance of ROP signaling for salinity tolerance in Arabidopsis...
January 9, 2017: Plant, Cell & Environment
https://www.readbyqxmd.com/read/28070752/absence-of-macrophage-migration-inhibitory-factor-reduces-proliferative-retinopathy-in-a-mouse-model
#8
Jing Wang, Jihong Lin, Ulrike Kaiser, Paulus Wohlfart, Hans-Peter Hammes
AIMS: Ischemia-induced neovascularization is the key feature of proliferative diabetic retinopathy. Macrophage migration inhibitory factor (MIF) is a pleiotropic proinflammatory and proangiogenic cytokine, and its levels are elevated in the vitreous of patients with proliferative diabetic retinopathy. In this study, we aimed at investigating the relative potential of MIF in the ischemia-induced retinal neovascularization. METHODS: Both WT and MIF-knockout mice were subjected to the retinopathy of prematurity (ROP) model...
January 9, 2017: Acta Diabetologica
https://www.readbyqxmd.com/read/28068064/versatile-functionalization-of-polysaccharides-via-polymer-grafts-from-design-to-biomedical-applications
#9
Yang Hu, Yang Li, Fu-Jian Xu
Because of their biocompatibility, biodegradability, and unique bioactive properties, polysaccharides have been recognized and directly applied as excellent candidates for various biomedical applications. In order to introduce more functionalities onto polysaccharides, various modification methods were applied to improve the physical-chemical and biochemical properties. Grafting polysaccharides with functional polymers with limited reaction sites maximizes the structural integrity. To the best of our knowledge, great efforts have been made by scientists across the world, including our research group, to explore different strategies for the synthesis and design of controllable polymer-grafted polysaccharides...
January 9, 2017: Accounts of Chemical Research
https://www.readbyqxmd.com/read/28066825/a-blinded-randomised-placebo-controlled-trial-investigating-the-efficacy-of-morphine-analgesia-for-procedural-pain-in-infants-trial-protocol
#10
Rebeccah Slater, Caroline Hartley, Fiona Moultrie, Eleri Adams, Ed Juszczak, Richard Rogers, Jane E Norman, Chetan Patel, Kayleigh Stanbury, Amy Hoskin, Gabrielle Green
Infant pain has both immediate and long-term negative consequences, yet in clinical practice it is often undertreated. To date, few pain-relieving drugs have been tested in infants. Morphine is a potent analgesic that provides effective pain relief in adults, but there is inconclusive evidence for its effectiveness in infants. The purpose of this study is to establish whether oral morphine provides effective analgesia for procedural pain in infants. A blinded, placebo-controlled, parallel-group randomized, phase II, clinical trial will be undertaken to determine whether morphine sulphate administered orally prior to clinically-required retinopathy of prematurity (ROP) screening and heel lancing provides effective analgesia...
November 15, 2016: Wellcome Open Res
https://www.readbyqxmd.com/read/28058162/bedside-diode-laser-photocoagulation-under-remifentanil-analgesia-for-retinopathy-of-prematurity-early-structural-outcomes
#11
Mehmet Ali Şekeroğlu, Emre Hekimoğlu, Beyza Özcan, Ahmet Yağmur Baş, Nihal Demirel, Jale Karakaya
OBJECTIVES: To evaluate one-year structural outcomes of bedside diode laser photocoagulation with remifentanil analgesia for retinopathy of prematurity (ROP) and discuss clinical and demographic characteristics of infants and other possible risk factors that may affect the outcome. MATERIALS AND METHODS: The medical records of premature infants who were treated with bedside transpupillary diode laser photocoagulation under remifentanil analgesia for ROP were evaluated for clinical and demographic characteristics, accompanying systemic risk factors, laser parameters, complications of treatment, retreatment rate and one-year structural outcomes...
October 2016: Turkish Journal of Ophthalmology
https://www.readbyqxmd.com/read/28057383/reference-values-for-nucleated-red-blood-cells-and-serum-lactate-in-very-and-extremely-low-birth-weight-infants-in-the-first-week-of-life
#12
Martin Poryo, Antonia Wissing, Aylin Aygün, Jürgen Geisel, Stefan Wagenpfeil, Michael Zemlin, Sascha Meyer
STUDY PURPOSE: To provide reference values for nucleated red blood cells and serum lactate concentrations in very and extremely low birth weight (VLBW/ELBW) infants in the first week of life. PATIENTS AND METHODS: Retrospective data analysis of serial, daily measurements of NRBC counts and serum lactate during the first 6days of life in VLBW and ELBW infants. RESULTS: In total, 250 infants<1500g were included in this study. Intrauterine growth retardation (IUGR) was seen in 87 (34...
January 2, 2017: Early Human Development
https://www.readbyqxmd.com/read/28056115/a-tiered-approach-to-retinopathy-of-prematurity-screening-tarp-using-a-weight-gain-predictive-model-and-a-telemedicine-system
#13
Jaclyn Gurwin, Lauren A Tomlinson, Graham E Quinn, Gui-Shuang Ying, Agnieshka Baumritter, Gil Binenbaum
Importance: The Telemedicine Approaches to Evaluating Acute-Phase Retinopathy of Prematurity (e-ROP) Study telemedicine system of remote fundus image grading and The Children's Hospital of Philadelphia Retinopathy of Prematurity (CHOP-ROP) postnatal weight gain predictive model are 2 approaches for improving ROP screening efficiency. Current screening has low specificity for severe ROP. Objective: To describe a tiered approach to ROP screening (TARP) for identifying children who develop severe ROP using telemedicine and a predictive model synergistically...
January 5, 2017: JAMA Ophthalmology
https://www.readbyqxmd.com/read/28054213/visual-outcome-and-refractive-status-in-first-3%C3%A2-years-of-age-in-preterm-infants-suffered-from-laser-treated-type-1-retinopathy-of-prematurity-rop-a-6-year-retrospective-review-in-a-tertiary-centre-in-hong-kong
#14
Julie Y C Lok, Wilson W K Yip, Abbie S W Luk, Joyce K Y Chin, Henry H W Lau, Alvin L Young
PURPOSE: To report the visual outcome and refractive status in first 3 years of age in preterm infants suffered from laser-treated Type 1 retinopathy of prematurity (ROP): a 6-year review in Hong Kong DESIGN: Retrospective case series METHODOLOGY: Clinical records of all infants suffered from Type 1 ROP who had undergone laser therapy between 2007 and 2012 were retrospectively reviewed. Basic demographic data, serial changes of refractive error, visual acuity, severity of ROP and laser were analyzed...
January 4, 2017: International Ophthalmology
https://www.readbyqxmd.com/read/28045394/expression-purification-and-crystallization-of-a-protein-resulting-from-the-inversion-of-the-amino-acid-sequence-of-a-helical-bundle
#15
Aikaterini Kefala, Dina Kotsifaki, Mary Providaki, Maria Amprazi, Michael Kokkinidis
Earlier studies have found that the occurrence of inverse sequence identity in proteins is not indicative of three-dimensional similarity, but rather leads to different folds or unfolded proteins. Short helices, however, frequently keep their conformations when their sequences are inverted. To explore the impact of sequence inversion on long helices, revRM6, with the inverse amino-acid sequence relative to RM6, a highly stable variant of the ColE1 Rop protein, was engineered. RM6 is a highly regular four-α-helical bundle that serves as a model system for protein-folding studies...
January 1, 2017: Acta Crystallographica. Section F, Structural Biology Communications
https://www.readbyqxmd.com/read/28044380/no-strain-no-gain-enzymatic-ring-opening-polymerization-of-strainless-aliphatic-macrolactones
#16
Timo Witt, Manuel Häußler, Stefan Mecking
Starting from readily available oleic and erucic acid, macrocyclic nonadecalactone (C19 ) and tricosalactone (C23 ) can be synthesized in polymerization grade purity in a four-step reaction sequence. Ring-opening polymerization (ROP) of these strainless macrolactones can be performed utilizing an enzyme as a catalyst. Despite the missing ring-strain as key driving force for smaller (strained) lactones, high molar masses (Mn ≈ 10(5) g mol(-1) ) can be accessed in an entropically driven ROP. Polyester-19 and polyester-23 prepared feature melting temperatures well above 100 °C...
January 3, 2017: Macromolecular Rapid Communications
https://www.readbyqxmd.com/read/28026097/barley-susceptibility-factor-racb-modulates-transcript-levels-of-signalling-protein-genes-in-compatible-interaction-with-blumeria-graminis-f-sp-hordei
#17
Vera Schnepf, A Corina Vlot, Karl Kugler, Ralph Hückelhoven
RHO (rat sarcoma homologue) GTPases are regulators of downstream transcriptional responses of eukaryotes to intracellular and extracellular stimuli. For plants, little is known about the function of Rho-like GTPases (called RACs [rat sarcoma-related C botulinum substrate] or ROPs [RHO of plants]) in transcriptional reprogramming of cells. However, in plant hormone response and innate immunity RAC/ROP proteins influence gene expression patterns. The barley RAC/ROP RACB is required for full susceptibility of barley to the powdery mildew fungus Blumeria graminis f...
December 27, 2016: Molecular Plant Pathology
https://www.readbyqxmd.com/read/28018938/computer-aided-diagnosis-of-retinopathy-in-retinal-fundus-images-of-preterm-infants-via-quantification-of-vascular-tortuosity
#18
Faraz Oloumi, Rangaraj M Rangayyan, Anna L Ells
Retinopathy of prematurity (ROP), a disorder of the retina occurring in preterm infants, is the leading cause of preventable childhood blindness. An active phase of ROP that requires treatment is associated with the presence of plus disease, which is diagnosed clinically in a qualitative manner by visual assessment of the existence of a certain level of increase in the thickness and tortuosity of retinal vessels. The present study performs computer-aided diagnosis (CAD) of plus disease via quantitative measurement of tortuosity in retinal fundus images of preterm infants...
October 2016: Journal of Medical Imaging
https://www.readbyqxmd.com/read/28012875/advances-in-understanding-and-management-of-retinopathy-of-prematurity
#19
REVIEW
Mary Elizabeth Hartnett
The understanding, diagnosis and treatment of retinopathy of prematurity (ROP) have changed in the last seventy years since the original description of retrolental fibroplasia associated with high oxygenation. It is now recognized that ROP differs in appearance world-wide and as ever smaller and younger premature infants survive. New methods are being evaluated to image the retina, diagnose severe ROP, and determine windows of time for treatment to save eyes and improve visual and neural outcomes. New treatments to promote physiologic retinal vascular development, vascular repair, and inhibit vasoproliferation by regulating proteins involved in vascular endothelial growth factor, insulin-like growth factor, or erythropoietin signaling...
December 21, 2016: Survey of Ophthalmology
https://www.readbyqxmd.com/read/28009339/the-effects-of-thyroid-function-on%C3%A2-retinopathy-of-prematurity
#20
Levent Korkmaz, Osman Baştuğ, Ghaniya Daar, Sabriye Korkut, Ahmet Özdemir, Mehmet Adnan Öztürk, Tamer Güneş, Selim Kurtoğlu
OBJECTIVES: To assess whether TSH and fT4 have a role in the angiogenesis of vaso-obliteration and neovascularization which are the basic pathophysiology of ROP. METHODS: In this retrospective case-control study, the control group (n = 56) included preterm newborns with risk for ROP while the laser group (n = 63) was recruited from cases who developed severe neovascularization and needed laser photocoagulation therapy. Considering the first (vaso-obliteration) and second (neovascularization) phases of the disease, in this study we researched the distribution of thyroid function tests between groups...
2016: Journal of Neonatal-perinatal Medicine
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