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Alessia Trimigno, Bekzod Khakimov, Francesco Savorani, Leonardo Tenori, Vaiva Hendrixson, Alminas Čivilis, Marija Glibetic, Mirjana Gurinovic, Saara Pentikäinen, Janne Sallinen, Sara Garduno Diaz, Francesca Pasqui, Santosh Khokhar, Claudio Luchinat, Alessandra Bordoni, Francesco Capozzi, Søren Balling Engelsen
SCOPE: According to Eurostat 2016, approximately 119 million European citizens live at-risk-of-poverty (ROP). This subpopulation is highly diverse by ethnicity, age and culture in the different EU states, but they all have in common a low income, that could represent an increased risk of nutrients deficiencies due to poor nutritional habits. This study aims to investigate the human urine metabolome in the search of common biomarkers representing dietary deficiencies amongst European populations at ROP...
May 14, 2018: Molecular Nutrition & Food Research
Mathias Nottensteiner, Bernd Zechmann, Christopher McCollum, Ralph Hückelhoven
Pathogens overcome plant immunity by the means of secreted effectors. Host effector targets often act in pathogen defense but might also support fungal accommodation or nutrition. The barley ROP GTPase HvRACB is involved in accommodation of fungal haustoria of the powdery mildew fungus Blumeria graminis f.sp. hordei (Bgh) in barley epidermal cells. We found that HvRACB interacts with the ROP-interactive peptide 1 (ROPIP1) that is encoded on the active non-long terminal repeat retroelement Eg-R1 of Bgh. Over-expression of ROPIP1 in barley epidermal cells and host-induced post-transcriptional gene silencing (HIGS) of ROPIP1 suggested that ROPIP1 is involved in virulence of Bgh...
May 11, 2018: Journal of Experimental Botany
David Aboudi, Nithya Swaminathan, Heather Brumberg, Qiuhu Shi, Deborah Friedman, Boriana Parvez, Usha Krishnan
OBJECTIVE: To assess whether sildenafil is associated with worsening retinopathy of prematurity (ROP) in very low birth weight (VLBW) infants (≤1500 g) with bronchopulmonary dysplasia (BPD). STUDY DESIGN: This retrospective case-control study included VLBW infants admitted to the neonatal intensive care unit between January 1, 2006, and December 31, 2012. Each infant treated with sildenafil was assigned 3 unexposed controls matched for gestational age, birth weight, and BPD diagnosis...
May 9, 2018: Journal of Pediatrics
Hajime Nakajima, Katja Loos, Shinobu Ishizu, Yoshiharu Kimura
In this study, poly(mandelate-co-glycolate) (PMG), a modified polyglycolide (PGL), is prepared by ring-opening polymerization (ROP) of L-3-phenyl-1,4-dioxane-2,5-dione (PDD); the cyclic dimer of biobased mandelic acid and glycolic acid. The resulting polymer shows an increased glass transition temperature (Tg ) due to the incorporation of phenyl groups in the chain. High molecular weight PMG is obtained by bulk ROP at 150 °C, and it exhibits a glassy amorphous state with enhanced thermal properties such as a Tg being 35 °C higher than conventional PGL...
May 11, 2018: Macromolecular Rapid Communications
Xiao-Yan Tu, Chao Meng, Xiao-Long Zhang, Miao-Ge Jin, Xian-Shuo Zhang, Xue-Zhi Zhao, Yun-Fei Wang, Li-Wei Ma, Bao-Yan Wang, Ming-Zhu Liu, Hua Wei
The cyclic brush polymers, due to the unique topological structure, have shown in the previous studies higher delivery efficacy than the bottlebrush analogues as carriers for drug and gene transfer. However, to the best of knowledge, the preparation of reduction-sensitive cyclic brush polymers for drug delivery applications remains unexplored. For this purpose, a reduction-sensitive amphiphilic cyclic brush copolymer, poly(2-hydroxyethyl methacrylate-g-poly(ε-caprolactone)-disulfide link-poly(oligoethyleneglycol methacrylate)) (P(HEMA-g-PCL-SS-POEGMA)) with reducible block junctions bridging the hydrophobic PCL middle layer and the hydrophilic POEGMA outer corona is designed and synthesized successfully in this study via a "grafting from" approach using sequential ring-opening polymerization (ROP) and atom transfer free radical polymerization (ATRP) from a cyclic multimacroinitiator PHEMA...
May 10, 2018: Macromolecular Bioscience
Sara Arranz, Nuria Monferrer, M Jose Algora, Angel Cabezas, Montse Sole, E Vilella, J Labad, Vanessa Sanchez-Gistau
BACKGROUND: There is a lack of studies investigating the dose-response effect of childhood trauma, recent events and cannabis use on recent psychosis. This study aims to determine the relationship between the level of exposure to stress factors and cannabis use with psychosis and to determine the combination effect among these factors in predicting a psychotic disorder. METHODS: 146 recent onset psychotic (ROP) patients and 61 healthy controls were included. Childhood trauma was evaluated using the childhood trauma questionnaire (CTQ) and recent events using the Holmes-Rahe social readjustment scale...
May 6, 2018: Schizophrenia Research
Weihong Guo, Lizhi Deng, Jiang Yu, Zhaoyu Chen, Yanghee Woo, Hao Liu, Tuanjie Li, Tian Lin, Hao Chen, Mingli Zhao, Liming Zhang, Guoxin Li, Yanfeng Hu
Drug resistance is the major challenge facing cancer chemotherapy and nanoscale delivery systems based on natural materials, such as sericin, are a promising means of overcoming drug resistance. Yet, no attempt of introducing synthetic poly(γ-benzyl-L-glutamate) (PBLG) onto sericin polypeptide to fabricate a facile biocompatible and biodegradable micelle has been tried. Here, we prepared a polypeptide-based amphiphilic polymer containing hydrophilic sericin polypeptide backbone and PBLG side chains via ring-opening polymerization (ROP) strategy...
November 2018: Drug Delivery
Akiko Miki, Shigeru Honda, Yukako Inoue, Yuko Yamada, Makoto Nakamura
PURPOSE: This study evaluates optical coherence tomography (OCT) findings of the macula in patients with a history of retinopathy of prematurity (ROP). METHODS: We enrolled 112 patients (age: 6-15 years) and categorized them into 3 groups: gestational age (GA) < 36 weeks with or without a history of ROP (ROP group, preterm group) and GA ≥37 weeks. We included 1 eye of each patient and measured the retinal thickness of the macula by OCT. RESULTS: The ROP group demonstrated the worst VA and the shallowest foveal depression...
May 9, 2018: Ophthalmologica. Journal International D'ophtalmologie
Homa Babaei, Mahdi Alibabrdel, Simin Asadian, Vahid Siavashi, Masoome Jabarpour, Seyed Mahdi Nassiri
Retinopathy of prematurity (ROP) is a result of increased pathological neoangiogenesis of the retina in preterm infants. Cells responsible for the pathogenesis of ROP are unclear, but some evidence indicates that bone marrow derived cells are involved in this disorder. Endothelial progenitor cells (EPCs), play a role in angiogenesis in response to tissue ischemia or endothelial damage. In this study, the number of cEPCs in preterm infants with ROP was determined to identify whether the circulation mobilization of EPCs is associated with ROP...
May 8, 2018: Journal of Cellular Biochemistry
Aaron B Simmons, Colin A Bretz, Haibo Wang, Eric Kunz, Kassem Hajj, Carson Kennedy, Zhihong Yang, Thipparat Suwanmanee, Tal Kafri, M Elizabeth Hartnett
Inhibition of vascular endothelial growth factor (VEGF) in retinopathy of prematurity (ROP) raises concerns for premature infants because VEGF is essential for retinovascular development as well as neuronal and glial health. This study tested the hypothesis that endothelial cell-specific knockdown of VEGF receptor 2 (VEGFR2), or downstream STAT3, would inhibit VEGF-induced retinopathy without delaying physiologic retinal vascular development. We developed an endothelial cell-specific lentiviral vector that delivered shRNAs to VEGFR2 or STAT3 and a green fluorescent protein reporter under control of the VE-cadherin promoter...
May 5, 2018: Angiogenesis
Mark Abubekerov, Junnian Wei, Kevin R Swartz, Zhixin Xie, Qibing Pei, Paula L Diaconescu
Poly(l-lactide) (PLA) is a bioderived and biodegradable polymer that has limited applications due to its hard and brittle nature. Incorporation of 1,3-trimethylene carbonate into PLA, in a block copolymer fashion, improves the mechanical properties, while retaining the biodegradability of the polymer, and broadens its range of applications. However, the preparation of 1,3-trimethylene carbonate (TMC)/l-lactide (LA) copolymers beyond diblock and triblock structures has not been reported, with explanations focusing mostly on thermodynamic reasons that impede the copolymerization of TMC after lactide...
February 28, 2018: Chemical Science
Yen-Chih Chen, San-Ni Chen, Benjamin Chi-Lan Yang, Kun-Hsien Lee, Chih-Chun Chuang, Chieh-Yin Cheng
Purpose: To compare refractive and biometric outcomes in patients with type 1 retinopathy of prematurity (ROP) treated with intravitreal injection of ranibizumab (IVR) versus bevacizumab (IVB), at a corrected age of 3 years. Methods: A retrospective case series compared cycloplegic refractive statuses and biometric statuses in patients who received either IVR or IVB for type 1 ROP, from April 2011 to April 2014. Results: A total of 62 eyes (33 patients) with type 1 ROP were evaluated (26 eyes in 13 IVR patients and 36 eyes in 20 IVB patients)...
2018: Journal of Ophthalmology
Sang Jin Kim, J Peter Campbell, Jayashree Kalpathy-Cramer, Susan Ostmo, Karyn E Jonas, Dongseok Choi, R V Paul Chan, Michael F Chiang
Importance: Presence of plus disease in retinopathy of prematurity is the most critical element in identifying treatment-requiring disease. However, there is significant variability in plus disease diagnosis. In particular, plus disease has been defined as 2 or more quadrants of vascular abnormality, and it is not clear whether it is more reliably and accurately diagnosed by eye-based assessment of overall retinal appearance or by quadrant-based assessment combining grades of 4 individual quadrants...
April 26, 2018: JAMA Ophthalmology
Masoud Foroutan, Fatemeh Ghaffarifar, Zohreh Sharifi, Abdolhosein Dalimi, Majid Pirestani
Rhoptry proteins (ROPs) are involved in the different stages of Toxoplasma gondii (T. gondii) invasion and are also critical for survival within host cells. ROP8 expressed in the early stages of infection and have a key role in the parasitophorous vacuole (PV) formation. In this paper, we have combined several bioinformatics online servers for immunogenicity prediction of ROP8 protein. In this study, several bioinformatics approaches were used to analyze the different aspects of ROP8 protein, including the physico-chemical properties, transmembrane domain, subcellular localization, secondary and tertiary structure, B and T-cell potential epitopes, and other important characteristics of this protein...
April 26, 2018: Infection, Genetics and Evolution
Wei Chen, Pingping Gong, Jingzhe Guo, Hui Li, Ruizi Li, Weiman Xing, Zhenbiao Yang, Yuefeng Guan
As a universal energy generation pathway utilizing carbon metabolism, glycolysis plays an important housekeeping role in all organisms. Pollen tubes expand rapidly via a mechanism of polarized growth, known as tip growth, to deliver sperm for fertilization. Here, we report a novel and surprising role of glycolysis in the regulation of growth polarity in Arabidopsis pollen tubes via impingement of Rho GTPase-dependent signaling. We identified a cytosolic phosphoglycerate kinase (pgkc-1) mutant with accelerated pollen germination and compromised pollen tube growth polarity...
April 27, 2018: PLoS Genetics
Julia P Shulman, M Elizabeth Hartnett
Retinopathy of prematurity (ROP) is a leading cause of blindness in preterm infants around the world. Through the development of animal models and clinical trials our understanding of the pathophysiology of this disease and approach to therapy has evolved significantly since ROP was first described in the 1940s in the United States. The mainstay of treatment in ROP remains ablative laser therapy to the avascular retina but pharmacologic agents are being more and more commonly used with new targets for pharmacotherapy emerging...
April 27, 2018: Asia-Pacific Journal of Ophthalmology
Yan Xiao, Jinghao Pan, Dong Wang, Andreas Heise, Meidong Lang
With increasing troubles in bacterial contamination and antibiotic-resistance, new materials possessing both biocompatibility and antimicrobial efficacy are supposed to be developed for future biomedical application. Herein, we demonstrated a chemo-enzymatic ring opening polymerization (ROP) approach for block copolyester, i.e., poly(4-benzyl formate piperidine lactone-b-ω-pentadecalactone) (PNPIL-b-PPDL), in a one-pot two-step process. Afterwards, cationic poly(4-piperidine lactone-b-ω-pentadecalactone) (PPIL-b-PPDL) with pendent secondary amino groups was obtained via acidic hydrolysis of PNPIL-b-PPDL...
April 26, 2018: Biomacromolecules
Zixing Li, Yohei Takahashi, Alexander Scavo, Benjamin Brandt, Desiree Nguyen, Philippe Rieu, Julian I Schroeder
Abscisic acid (ABA) plays essential roles in plant development and responses to environmental stress. ABA induces subcellular translocation and degradation of the guanine nucleotide exchange factor RopGEF1, thus facilitating ABA core signal transduction. However, the underlying mechanisms for ABA-triggered RopGEF1 trafficking/degradation remain unknown. Studies have revealed that RopGEFs associate with receptor-like kinases to convey developmental signals to small ROP GTPases. However, how the activities of RopGEFs are modulated is not well understood...
April 23, 2018: Proceedings of the National Academy of Sciences of the United States of America
Sang Jin Kim, Alexander D Port, Ryan Swan, J Peter Campbell, R V Paul Chan, Michael F Chiang
Retinopathy of prematurity (ROP) is a retinal vasoproliferative disease that affects premature infants. Despite improvements in neonatal care and management guidelines, ROP remains a leading cause of childhood blindness worldwide. Current screening guidelines are primarily based on two risk factors: birth weight and gestational age; however, many investigators have suggested other risk factors, including maternal factors, prenatal and perinatal factors, demographics, medical interventions, comorbidities of prematurity, nutrition, and genetic factors...
April 19, 2018: Survey of Ophthalmology
Xiu-Mei Yang, Yue-Xiang Zhao, Zong-Hua Wang, Lu Liu
AIM: To evaluate the effect of intravitreal ranibizumab injection for retinopathy of prematurity (ROP) in Zone II Stage 3+ . METHODS: Data was collected for ROP patients with Zone II Stage 3+ who received intravitreal ranibizumab injections between October 2014 and Janu-ary 2017 at the Department of Ophthalmology in our hospital. No prior laser or other intravitreal treatment was done. Prior to the intervention and at each follow-up visit, fundus examination was performed...
2018: International Journal of Ophthalmology
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