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https://www.readbyqxmd.com/read/29344896/a-robust-optimization-approach-to-cancer-treatment-under-toxicity-uncertainty
#1
Junfeng Zhu, Hamidreza Badri, Kevin Leder
The design of optimal protocols plays an important role in cancer treatment. However, in clinical applications, the outcomes under the optimal protocols are sensitive to variations of parameter settings such as drug effects and the attributes of age, weight, and health conditions in human subjects. One approach to overcoming this challenge is to formulate the problem of finding an optimal treatment protocol as a robust optimization problem (ROP) that takes parameter uncertainty into account. In this chapter, we describe a method to model toxicity uncertainty...
2018: Methods in Molecular Biology
https://www.readbyqxmd.com/read/29342082/lewis-pair-catalysts-in-the-polymerization-of-lactide-and-related-cyclic-esters
#2
REVIEW
Xinlei Li, Changjuan Chen, Jincai Wu
Polyesters, especially poly(lactide) (PLA), are used widely as biodegradable and biocompatible materials, yet their controllable synthesis, especially the stereoselective synthesis of polyesters, is still a challenge. Recently some excellent Lewis pair catalysts for ring-opening polymerization (ROP) of lactide and related cyclic esters have emerged. This review article will highlight the key advances in the ROP catalyzed by Lewis pair compounds with the aim of encouraging the wider application of Lewis pair catalysts in the polymerization of lactide and related cyclic esters...
January 17, 2018: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/29340786/in-silico-identification-and-experimental-validation-of-amino-acid-motifs-required-for-the-rho-of-plants-gtpase-mediated-activation-of-receptor-like-cytoplasmic-kinases
#3
Dézi Bianka Lajkó, Ildikó Valkai, Mónika Domoki, Dalma Ménesi, Györgyi Ferenc, Ferhan Ayaydin, Attila Fehér
Several amino acid motifs required for Rop-dependent activity were found to form a common surface on RLCKVI_A kinases. This indicates a unique mechanism for Rho-type GTPase-mediated kinase activation in plants. Rho-of-plants (Rop) G-proteins are implicated in the regulation of various cellular processes, including cell growth, cell polarity, hormonal and pathogen responses. Our knowledge about the signalling pathways downstream of Rops is continuously increasing. However, there are still substantial gaps in this knowledge...
January 16, 2018: Plant Cell Reports
https://www.readbyqxmd.com/read/29339088/retinal-neuronal-cell-loss-prevents-abnormal-retinal-vascular-growth-in-a-rat-model-of-retinopathy-of-prematurity
#4
Ayuki Nakano, Daiki Asano, Ryo Kondo, Asami Mori, Shiho Arima, Hiroko Ushikubo, Kenji Sakamoto, Tohru Nagamitsu, Kunio Ishii, Tsutomu Nakahara
A short-term blockade of the vascular endothelial growth factor (VEGF)-mediated pathway in neonatal rats results in formation of severe retinopathy of prematurity (ROP)-like retinal blood vessels. The present study aimed to examine the role of retinal neurons in the formation of abnormal retinal blood vessels. Newborn rats were treated subcutaneously with the VEGF receptor tyrosine kinase inhibitor, KRN633 (10 mg/kg), or its vehicle (0.5% methylcellulose in water) on postnatal day (P) 7 and P8. To induce excitotoxic loss of retinal neurons, N-methyl-D-aspartic acid (NMDA) was injected into the vitreous chamber of the eye on P9...
January 12, 2018: Experimental Eye Research
https://www.readbyqxmd.com/read/29334805/delivery-of-radix-ophiopogonis-polysaccharide-via-sucrose-acetateisobutyrate-based-in-situ-forming-systems-alone-or-combined-with-itsmono-pegylation
#5
LiNa Wang, Xiao Zheng, Fei Wu, Lan Shen, Xiao Lin, Yi Feng
This work aimed to achieve long-lasting delivery of radix ophiopogonis polysaccharide (ROP) by sucrose acetate isobutyrate (SAIB)-based in situ forming systems (ISFSs) alone or combined with mono-PEGylation of ROP. When the '90%SAIB/10% solvent' system was used, the mean residence time (MRT) of ROP was prolonged by 4.3 5 ∼ 7.00 times and the initial release rate was reduced significantly. However, this system was only suitable for days-long sustained release of ROP in short-term therapy. As to the 'SAIB/additives/solvent' system containing mono-PEGylated ROP, the results indicated that SAIB/poly(d,l-lactide-co-glycolide) (PLGA)/N-methyl-2-pyrrolidone (NMP) was superior to SAIB/polylactic acid (PLA)/NMP and SAIB/PLA/ethanol in controlled release...
November 2018: Drug Delivery
https://www.readbyqxmd.com/read/29320482/severe-retinopathy-of-prematurity-is-associated-with-reduced-cerebellar-and-brainstem-volumes-at-term-and-neurodevelopmental-deficits-at-two-years
#6
Femke J Drost, Kristin Keunen, Pim Moeskops, Nathalie H P Claessens, Femke van Kalken, Ivana Išgum, Elsbeth S M Voskuil-Kerkhof, Floris Groenendaal, Linda S de Vries, Manon J N L Benders, Jacqueline U M Termote
OBJECTIVE: To evaluate the association between severe retinopathy of prematurity (ROP), measures of brain morphology at term equivalent age (TEA) and neurodevelopmental outcome. PATIENTS AND METHODS: 18 infants with severe ROP (median gestational age (GA) 25.3 (range 24.6-25.9 weeks) were included in this retrospective case-control study. Each infant was matched to two extremely preterm control infants (n=36) by GA, birth weight, sex and brain injury. T2-weighted images were obtained on a 3T MRI at TEA...
January 10, 2018: Pediatric Research
https://www.readbyqxmd.com/read/29318237/sustainable-terpene-based-polyamides-via-anionic-polymerization-of-a-pinene-derived-lactam
#7
Malte Winnacker, Jacob Sag
A sustainable lactam, which is derived from the renewable terpene β-pinene, is converted to polyamides via a convenient anionic ring-opening polymerization (ROP), which can be easily handled without the use of a costly catalyst. The resulting polyamides have prosperous thermal properties, which enable their future use as high-performance polymers.
January 10, 2018: Chemical Communications: Chem Comm
https://www.readbyqxmd.com/read/29309486/comparing-alternative-ranibizumab-dosages-for-safety-and-efficacy-in-retinopathy-of-prematurity-a-randomized-clinical-trial
#8
Andreas Stahl, Tim U Krohne, Nicole Eter, Isabel Oberacher-Velten, Rainer Guthoff, Synke Meltendorf, Oliver Ehrt, Sabine Aisenbrey, Johann Roider, Heinrich Gerding, Claudia Jandeck, Lois E H Smith, Johanna M Walz
Importance: Anti-vascular endothelial growth factor (VEGF) therapies are a novel treatment option in retinopathy of prematurity (ROP). Data on dosing, efficacy, and safety are insufficient. Objective: To investigate lower doses of anti-VEGF therapy with ranibizumab, a substance with a significantly shorter systemic half-life than the standard treatment, bevacizumab. Design, Setting, and Participants: This randomized, multicenter, double-blind, investigator-initiated trial at 9 academic medical centers in Germany compared ranibizumab doses of 0...
January 8, 2018: JAMA Pediatrics
https://www.readbyqxmd.com/read/29308602/anti-vascular-endothelial-growth-factor-vegf-drugs-for-treatment-of-retinopathy-of-prematurity
#9
REVIEW
Mari Jeeva Sankar, Jhuma Sankar, Parijat Chandra
BACKGROUND: Vascular endothelial growth factor (VEGF) plays a key role in angiogenesis in foetal life. Researchers have recently attempted to use anti-VEGF agents for the treatment of retinopathy of prematurity (ROP), a vasoproliferative disorder. The safety and efficacy of these agents in preterm infants with ROP is currently uncertain. OBJECTIVES: To evaluate the efficacy and safety of anti-VEGF drugs when used either as monotherapy, that is without concomitant cryotherapy or laser therapy, or in combination with planned cryo/laser therapy in preterm infants with type 1 ROP (defined as zone I any stage with plus disease, zone I stage 3 with or without plus disease, or zone II stage 2 or 3 with plus disease)...
January 8, 2018: Cochrane Database of Systematic Reviews
https://www.readbyqxmd.com/read/29301213/lithium-complexes-derived-of-benzylphosphines-synthesis-characterization-and-evaluation-in-the-rop-of-rac-lactide-and-%C3%AE%C2%B5-caprolactone
#10
Ernesto Rufino-Felipe, Miguel-Ángel Muñoz-Hernández, Virginia Montiel-Palma
A series of lithium complexes ([Ph₂P(o-C₆H₄-CH₂Li·TMEDA)] (1-Li), [PhP(o-C₆H₄-CH₃)(o-C₆H₄-CH₂Li·TMEDA)] (2-Li), [PhP(o-C₆H₄-CH₂Li·TMEDA)₂] (2-Li₂) and [P(o-C₆H₄-CH₂Li·TMEDA)₃] (3-Li₃)) was prepared from mono-, di- and tri-benzylphosphines and varying amounts of nBuLi and was characterized extensively by IR and ¹H, ⁷Li, 13C and 31P NMR spectroscopy. The molecular structures of complexes 1-Li and 2-Li were determined by single-crystal X-ray diffraction studies. The two complexes have monomeric structures in the solid state comprising seesaw lithium atoms...
December 30, 2017: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/29300708/medial-open-transversus-abdominis-plane-motap-catheters-reduce-opioid-requirements-and-improve-pain-control-following-open-liver-resection-a-multicenter-blinded-randomized-controlled-trial
#11
Paul Jack Karanicolas, Sean Cleary, Paul McHardy, Alex Kiss, Jason Sawyer, Ramy Behman, Salima Ladak, Stuart A McCluskey, Coimbatore Srinivas, Joel Katz, Natalie Coburn, Calvin Law, Alice C Wei, Paul Greig, Julie Hallet, Hance Clarke
OBJECTIVE: Conventional management of pain following open liver resection involves intravenous, patient-controlled analgesia (IV PCA) or epidural analgesia. The objective of this trial was to assess the efficacy of a regional technique called Medial Open Transversus Abdominis Plane (MOTAP) catheter analgesia compared with IV PCA. METHODS: This was a blinded, randomized, controlled parallel-arm trial conducted at 2 high-volume centers. Patients undergoing liver resection through a subcostal incision were enrolled...
January 3, 2018: Annals of Surgery
https://www.readbyqxmd.com/read/29296003/retinopathy-of-prematurity-practices-a-national-survey-of-canadian-neonatal-intensive-care-units
#12
Kourosh Sabri, Mary Angela Woodward, Bethany Easterbrook, Sandesh Shivananda
OBJECTIVE: To examine current level three Neonatal Intensive Care Unit (NICU) practices related to ROP screening and treatment. STUDY DESIGN: A cross-sectional survey was sent to 29 level three NICU's across Canada to survey current screening inclusion criteria, treatment options, supportive care and post-screening events for ROP. RESULT: 22/29 (76%) level three NICU's responded. Ten different ROP screening inclusion criteria were found to be in use with significant variation in gestational age and birth weight criteria...
January 2, 2018: Journal of Perinatology: Official Journal of the California Perinatal Association
https://www.readbyqxmd.com/read/29290015/changes-in-systemic-vascular-endothelial-growth-factor-levels-after-intravitreal-injection-of-aflibercept-in-infants-with-retinopathy-of-prematurity
#13
Chung-Ying Huang, Reyin Lien, Nan-Kai Wang, An-Ning Chao, Kuan-Jen Chen, Tun-Lu Chen, Yih-Shiou Hwang, Chi-Chun Lai, Wei-Chi Wu
BACKGROUND: To investigate the levels of VEGF in the systemic circulation of patients with type 1 ROP who received intravitreal injections of 1 mg (0.025 mL) aflibercept (IVA) or 0.625 mg (0.025 mL) bevacizumab (IVB). METHODS: Patients who had type 1 ROP and received either IVA or IVB were enrolled in this prospective study. Serum and plasma samples were collected prior to and up to 12 weeks after IVB or IVA treatment. The serum and plasma VEGF levels were measured using enzyme-linked immunosorbent assays (ELISAs), and the platelet levels in the blood were also quantified...
December 30, 2017: Graefe's Archive for Clinical and Experimental Ophthalmology
https://www.readbyqxmd.com/read/29289308/creasensor-simple-technology-for-creatinine-detection-in-plasma
#14
Francesco Dal Dosso, Deborah Decrop, Elena Pérez-Ruiz, Devin Daems, Hannah Agten, Osamah Al-Ghezi, Olivier Bollen, Jolien Breukers, Florian De Rop, Maria Katsafadou, Jens Lepoudre, Linye Lyu, Pieter Piron, Robbe Saesen, Shoera Sels, Rani Soenen, Ellen Staljanssens, Jehan Taraporewalla, Tadej Kokalj, Dragana Spasic, Jeroen Lammertyn
The lab-on-a-chip (LOC) field has witnessed an excess of new technology concepts, especially for the point-of-care (POC) applications. However, only few concepts reached the POC market often because of challenging integration with pumping and detection systems as well as with complex biological assays. Recently, a new technology termed SIMPLE was introduced as a promising POC platform due to its features of being self-powered, autonomous in liquid manipulations, cost-effective and amenable to mass production...
February 13, 2018: Analytica Chimica Acta
https://www.readbyqxmd.com/read/29288532/impaired-cognitive-ability-at-2-5-years-predicts-later-visual-and-ophthalmological-problems-in-children-born-very-preterm
#15
Jonina Hreinsdottir, Ylva Fredriksson Kaul, Lena Hellström-Westas, Kerstin Rosander, Claes von Hofsten, Gerd Holmström
AIM: To identify possible predictive factors for visual problems at 6.5 years in children born very preterm. METHODS: During 2004 to 2007, all very preterm infants (gestational age < 32 weeks) in Uppsala County, Sweden, were screened for retinopathy of prematurity (ROP) neonatally; at four months visual tracking was tested; at 2.5 years, visuospatial and cognitive tests were carried out. At 6.5 years, 84 preterm children and a reference group of 64 full-term children underwent ophthalmological testing...
December 29, 2017: Acta Paediatrica
https://www.readbyqxmd.com/read/29283134/winrop-algorithm-for-prediction-of-sight-threatening-retinopathy-of-prematurity-initial-experience-in-indian-preterm-infants
#16
Gaurav Sanghi, Anil Narang, Sunny Narula, Mangat R Dogra
PURPOSE: To determine the efficacy of the online monitoring tool, WINROP (https://winrop.com/) in detecting sight-threatening type 1 retinopathy of prematurity (ROP) in Indian preterm infants. METHODS: Birth weight, gestational age, and weekly weight measurements of seventy preterm infants (<32 weeks gestation) born between June 2014 and August 2016 were entered into WINROP algorithm. Based on weekly weight gain, WINROP algorithm signaled an alarm to indicate that the infant is at risk for sight-threatening Type 1 ROP...
January 2018: Indian Journal of Ophthalmology
https://www.readbyqxmd.com/read/29282094/nasal-high-flow-therapy-in-very-low-birth-weight-infants-with-mild-respiratory-distress-syndrome-a-single-center-experience
#17
Antonio Di Mauro, Manuela Capozza, Sergio Cotugno, Silvio Tafuri, Francesco Paolo Bianchi, Federico Schettini, Raffaella Panza, Nicola Laforgia
BACKGROUND: Pulmonary disorders and respiratory failure represent one of the most common morbidities of preterm newborns admitted to neonatal intensive care units (NICUs). The use of nasal high-flow therapy (nHFT) has been more recently introduced into the NICUs as a non-invasive respiratory (NIV) support. METHODS: We performed a retrospective study to evaluate safety and effectiveness of nHFT as primary support for infants born < 29 weeks of gestation and/or VLBW presenting with mild Respiratory Distress Syndrome (RDS)...
December 28, 2017: Italian Journal of Pediatrics
https://www.readbyqxmd.com/read/29278801/smart-ph-sensitive-micelles-based-on-redox-degradable-polymers-as-dox-gnps-carriers-for-controlled-drug-release-and-ct-imaging
#18
Di Xiong, Xiaofang Zhang, Shiyuan Peng, Huawei Gu, Lijuan Zhang
An amphiphilic copolymer poly(ε-caprolactone)-ss-poly(2-(dimethylamino) ethyl methacrylate), PCL-SS-PDMAEMA, was designed and synthesized using ROP and ARGET ATRP methods. Dual stimulus responsive micelles were prepared by the self-assembly of PCL-SS-PDMAEMA. PDMAEMA could respond to acid conditions with protonation, followed by enhanced hydrophilicity and swelling of the micellar shell. In addition, the cleavable joint disulfide bond between the core and shell was disrupted when exposed to an abundance of the reductant reductive glutathione GSH, leading to the disassembly of the micellar structure...
December 8, 2017: Colloids and Surfaces. B, Biointerfaces
https://www.readbyqxmd.com/read/29278295/subjective-quality-of-life-in-recent-onset-of-psychosis-patients-and-its-association-with-sociodemographic-variables-psychotic-symptoms-and-clinical-personality-traits
#19
Julia Sevilla-Llewellyn-Jones, Pablo Cano-Domínguez, Antonia de-Luis-Matilla, Alberto Espina-Eizaguirre, Berta Moreno-Kustner, Susana Ochoa
AIM: There is lack of research on the study of clinical personality traits in recent onset of psychosis (ROP) patients. The aims of this research were to study the relations among psychosocial, personality and clinical characteristics in ROP patients and also the effect that significant variables had on the different domains of Quality of Life (QoL). METHODS: Data for these analyses were obtained from 81 ROP patients. The Millon Clinical Multiaxial Inventory, the Positive and Negative Syndrome Scale and the World Health Organization Quality of Life Brief Scale were used to assess personality, symptoms and QoL...
December 26, 2017: Early Intervention in Psychiatry
https://www.readbyqxmd.com/read/29276862/snappe-ii-and-risk-of-neonatal-morbidities-in-very-low-birth-weight-preterm-infants
#20
Beyza Özcan, A Sumru Kavurt, Özge Aydemir, Zeynep Gençtürk, Ahmet Yağmur Baş, Nihal Demirel
Özcan B, Kavurt AS, Aydemir Ö, Gençtürk Z, Baş AY, Demirel N. SNAPPE-II and risk of neonatal morbidities in very low birth weight preterm infants. Turk J Pediatr 2017; 59: 105-112. Illness severity scores were described to estimate the mortality and morbidity risks based on data obtained shortly after admission to an intensive care unit. The aim of this study is to evaluate Scores for Neonatal Acute Physiology-Perinatal Extension-II (SNAPPE-II) as a predictors of neonatal morbidities such as bronchopulmonary dysplasia (BPD) and retinopathy of prematurity (ROP)...
2017: Turkish Journal of Pediatrics
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