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https://www.readbyqxmd.com/read/28449543/nanoporous-cyanate-ester-resins-structure-gas-transport-property-relationships
#1
Kristina Gusakova, Alexander Fainleib, Eliane Espuche, Olga Grigoryeva, Olga Starostenko, Fabrice Gouanve, Gisèle Boiteux, Jean-Marc Saiter, Daniel Grande
This contribution addresses the relationships between the structure and gas transport properties of nanoporous thermostable cyanate ester resins (CERs) derived from polycyclotrimerization of 1,1'-bis(4-cyanatophenyl)ethane in the presence of 30 or 50 wt% of inert high-boiling temperature porogens (i.e., dimethyl- or dibutyl phthalates), followed by their quantitative removal. The nanopores in the films obtained were generated via a chemically induced phase separation route with further porogen extraction from the densely crosslinked CERs...
December 2017: Nanoscale Research Letters
https://www.readbyqxmd.com/read/28449343/cost-effectiveness-of-the-highly-effective-direct-acting-antivirals-in-the-treatment-of-chronic-hepatitis-c-in-hong-kong
#2
Angeline Oi-Shan Lo, Henry Lik-Yuen Chan, Vincent Wai-Sun Wong, Grace Lai-Hung Wong
BACKGROUND AND AIM: In Asia-Pacific where cost is a major concern, peginterferon plus ribavirin (PR) often remain as the standard of care in chronic hepatitis C (CHC) treatment, while the direct-acting antivirals (DAAs) are commonly recommended as retreatment. Newer DAAs can achieve a sustained virological response (SVR) of nearly 100% with pan-genotypic coverage, that is "Highly Effective DAAs." We aimed to investigate the most desirable cost range for the Highly Effective DAAs using Hong Kong as an example...
May 2017: Journal of Gastroenterology and Hepatology
https://www.readbyqxmd.com/read/28446382/compensatory-mechanisms-activated-with-intermittent-energy-restriction-a-randomized-control-trial
#3
Sílvia Ribeiro Coutinho, Eline Holli Halset, Sigrid Gåsbakk, Jens F Rehfeld, Bård Kulseng, Helen Truby, Cátia Martins
BACKGROUND & AIMS: Strong compensatory responses, with reduced resting metabolic rate (RMR), increased exercise efficiency (ExEff) and appetite, are activated when weight loss (WL) is achieved with continuous energy restriction (CER), which try to restore energy balance. Intermittent energy restriction (IER), where short spells of energy restriction are interspaced by periods of habitual energy intake, may offer some protection in minimizing those responses. We aimed to compare the effect of IER versus CER on body composition and the compensatory responses induced by WL...
April 7, 2017: Clinical Nutrition: Official Journal of the European Society of Parenteral and Enteral Nutrition
https://www.readbyqxmd.com/read/28409209/2-acetyl-5-tetrahydroxybutyl-imidazole-thi-protects-661w-cells-against-oxidative-stress
#4
Carlotta Fabiani, Aida Zulueta, Fabiola Bonezzi, Josefina Casas, Riccardo Ghidoni, Paola Signorelli, Anna Caretti
Retinal degeneration and in particular retinitis pigmentosa (RP) is associated to ceramide (Cer) accumulation and cell death induction. Cer and sphingosine-1-phosphate (S1P) belong to the sphingolipids class and exert a pro-apoptotic and pro-survival activity, respectively. Our aim is to target sphingolipid metabolism by inhibiting S1P lyase that regulates one of the S1P degradation pathways, to reduce retinal photoreceptor damage. The murine 661W cone-like cell line was pretreated with THI, an inhibitor of S1P lyase and exposed to H2O2-induced oxidative stress...
April 13, 2017: Naunyn-Schmiedeberg's Archives of Pharmacology
https://www.readbyqxmd.com/read/28407621/potential-applications-of-phyto-derived-ceramides-in-improving-epidermal-barrier-function
#5
Efrem N Tessema, Tsige Gebre-Mariam, Reinhard H H Neubert, Johannes Wohlrab
The outer most layer of the skin, the stratum corneum, consists of corneocytes which are coated by a cornified envelope and embedded in a lipid matrix of ordered lamellar structure. It is responsible for the skin barrier function. Ceramides (CERs) are the backbone of the intercellular lipid membranes. Skin diseases such as atopic dermatitis and psoriasis and aged skin are characterized by dysfunctional skin barrier and dryness which are associated with reduced levels of CERs. Previously, the effectiveness of supplementation of synthetic and animal-based CERs in replenishing the depleted natural skin CERs and restoring the skin barrier function have been investigated...
April 14, 2017: Skin Pharmacology and Physiology
https://www.readbyqxmd.com/read/28406488/making-genomic-medicine-evidence-based-and-patient-centered-a-structured-review-and-landscape-analysis-of-comparative-effectiveness-research
#6
REVIEW
Kathryn A Phillips, Patricia A Deverka, Harold C Sox, Muin J Khoury, Lewis G Sandy, Geoffrey S Ginsburg, Sean R Tunis, Lori A Orlando, Michael P Douglas
Comparative effectiveness research (CER) in genomic medicine (GM) measures the clinical utility of using genomic information to guide clinical care in comparison to appropriate alternatives. We summarized findings of high-quality systematic reviews that compared the analytic and clinical validity and clinical utility of GM tests. We focused on clinical utility findings to summarize CER-derived evidence about GM and identify evidence gaps and future research needs. We abstracted key elements of study design, GM interventions, results, and study quality ratings from 21 systematic reviews published in 2010 through 2015...
April 13, 2017: Genetics in Medicine: Official Journal of the American College of Medical Genetics
https://www.readbyqxmd.com/read/28399570/assessment-of-confounders-in-comparative-effectiveness-studies-from-secondary-databases
#7
Jessica M Franklin, Sebastian Schneeweiss, Daniel H Solomon
Secondary clinical databases are an important and growing source of data for comparative effectiveness research (CER) studies. However, measurement of confounders, such as biomarker values or patient-reported health status, in secondary clinical databases may not align with the initiation of a new treatment. In many published CER analyses of registry data, investigators assessed confounders based on the first questionnaire in which the new exposure was recorded. However, it is known that adjustment for confounders measured after the start of exposure can lead to biased treatment effect estimates...
March 15, 2017: American Journal of Epidemiology
https://www.readbyqxmd.com/read/28396016/differential-binding-and-activity-of-the-pore-forming-toxin-sticholysin-ii-in-model-membranes-containing-diverse-ceramide-derived-lipids
#8
Carmen Soto, Anaixis Del Valle, Pedro A Valiente, Uris Ros, María E Lanio, Ana M Hernández, Carlos Alvarez
Sticholysin II is a pore-forming toxin produced by the sea anemone Stichodactyla helianthus that belongs to the actinoporin protein family. The high affinity of actinoporins for sphingomyelin (SM)-containing membranes has been well documented. However, the molecular determinants that define this affinity have not been fully clarified. Here, we have examined the binding and permeabilizing activity of StII to different single and mixed lipidic systems by combining lipid monolayers, liposomes, and permeabilizing assays...
April 7, 2017: Biochimie
https://www.readbyqxmd.com/read/28384202/plasma-cross-gestational-sphingolipidomic-analyses-reveal-potential-first-trimester-biomarkers-of-preeclampsia
#9
Aneta Dobierzewska, Sony Soman, Sebastian E Illanes, Andrew J Morris
INTRODUCTION: Preeclampsia (PE) is a gestational disorder, manifested in the second half of pregnancy by maternal hypertension, proteinuria and generalized edema. PE is a major cause of maternal and fetal morbidity and mortality, accounting for nearly 40% of all premature births worldwide. Bioactive sphingolipids are emerging as key molecules involved in etiopathogenesis of PE, characterized by maternal angiogenic imbalance and symptoms of metabolic syndrome. The aim of this study was to compare the cross-gestational profile of circulating bioactive sphingolipids in maternal plasma from preeclamptic (PE) versus normotensive control (CTL) subjects with the goal of identifying sphingolipids as candidate first trimester biomarkers of PE for early prediction of the disease...
2017: PloS One
https://www.readbyqxmd.com/read/28364929/professional-changes-induced-by-a-redesigned-immunization-supply-chain-in-the-com%C3%A3-health-zone-benin
#10
Elise Guillermet, Daleb Abdoulaye Alfa, Romule Gbodja, Philippe Jaillard
At the end of 2013, the Government of Benin and Agence de Médecine Préventive (AMP) launched a demonstration project in Comé Health Zone (HZ) to optimize the vaccine supply chain. A key part of the demonstration project was the creation of an "informed push model" of vaccine distribution supported by a new logistician position at the health zone (district) level. At the conclusion of the demonstration project in 2015, the authors conducted an anthropological study consisting of semi-structured interviews with 62 participants to assess how the new model changed the professional identities, roles, responsibilities, and practices of personnel involved in vaccine management during and just after the demonstration project end in Comé HZ...
April 19, 2017: Vaccine
https://www.readbyqxmd.com/read/28363088/permeability-and-microstructure-of-model-stratum-corneum-lipid-membranes-containing-ceramides-with-long-c16-and-very-long-c24-acyl-chains
#11
Petra Pullmannová, Ludmila Pavlíková, Andrej Kováčik, Michaela Sochorová, Barbora Školová, Petr Slepička, Jaroslav Maixner, Jarmila Zbytovská, Kateřina Vávrová
The Stratum corneum (SC) prevents water loss from the body and absorption of chemicals. SC intercellular spaces contain ceramides (Cer), free fatty acids (FFA), cholesterol (Chol) and cholesteryl sulfate (CholS). Cer with "very long" acyl chains (for example, N-lignoceroyl-sphingosine, CerNS24) are important for skin barrier function, whereas increased levels of "long" acyl Cer (for example, N-palmitoyl-sphingosine, CerNS16) occur in patients suffering from atopic eczema or psoriasis. We studied the impact of the replacement of CerNS24 by CerNS16 on the barrier properties and microstructure of model SC lipid membranes composed of Cer/FFA/Chol/CholS...
March 21, 2017: Biophysical Chemistry
https://www.readbyqxmd.com/read/28357491/acid-sphingomyelinase-ceramide-regulates-carotid-intima-media-thickness-in-simulated-weightless-rats
#12
Yao-Ping Cheng, Hai-Jun Zhang, Yu-Ting Su, Xing-Xing Meng, Xiao-Ping Xie, Yao-Ming Chang, Jun-Xiang Bao
Structural adaptation of arteries to weightlessness might lower the working ability or even threaten the physical health of astronauts, but the underlying mechanism is unclear. Acid sphingomyelinase (ASM) catalyzes ceramide (Cer) generation controlling arterial remodeling through multiple signaling pathways. In the present study, we aimed to investigate the contribution of ASM/Cer to the changes of common carotid artery intima-media thickness (CIMT) induced by simulated weightlessness. Hindlimb-unloaded tail-suspended (HU) rats were used to simulate the effect of weightlessness...
March 29, 2017: Pflügers Archiv: European Journal of Physiology
https://www.readbyqxmd.com/read/28348559/mir-31-links-lipid-metabolism-and-cell-apoptosis-in-bacteria-challenged-apostichopus-japonicus-via-targeting-ctrp9
#13
Yina Shao, Chenghua Li, Wei Xu, Pengjuan Zhang, Weiwei Zhang, Xuelin Zhao
The biological functions of microRNAs (miRNAs) have been studied in a number of eukaryotic species. Recent studies on vertebrate animals have demonstrated critical roles of miRNA in immune and metabolic activities. However, studies on the functions of miRNA in invertebrates are very limited. Here, we demonstrated that miR-31 from Apostichopus japonicus disrupts the balance of lipid metabolism, thus resulting in cell apoptosis by targeting complement C1q tumor necrosis factor-related protein 9 (AjCTRP9), a novel adipokine with pleiotropic functions in immunity and metabolism...
2017: Frontiers in Immunology
https://www.readbyqxmd.com/read/28342989/patient-engagement-and-study-design-of-prop-up-a-multi-site-patient-centered-prospective-observational-study-of-patients-undergoing-hepatitis-c-treatment
#14
Donna M Evon, Carol E Golin, Paul Stewart, Michael W Fried, Shani Alston, Bryce Reeve, Anna S Lok, Richard K Sterling, Joseph K Lim, Nancy Reau, Souvik Sarkar, David R Nelson, K R Reddy, Adrian M Di Bisceglie
BACKGROUND: New highly efficacious direct-acting antiviral (DAA) therapies are available to treat chronic hepatitis C viral (HCV) infection. Real-world, patient-centered data on harms and benefits associated with these therapies are needed. METHODS: PROP UP is a multi-center prospective observational study that plans to enroll 1600 patients starting treatment with recently-approved DAA regimens. Informed by extensive input from a HCV patient engagement group who prioritized outcomes most important to them, patient-reported outcomes will be characterized using surveys at five time points: Baseline (T1), treatment week 4 (T2), end of treatment (T3), 12weeks post-treatment (T4), 12months post-treatment (T5)...
March 22, 2017: Contemporary Clinical Trials
https://www.readbyqxmd.com/read/28341437/lipid-functions-in-skin-differential-effects-of-n-3-polyunsaturated-fatty-acids-on-cutaneous-ceramides-in-a-human-skin-organ-culture-model
#15
Alexandra C Kendall, Magdalena Kiezel-Tsugunova, Luke C Brownbridge, John L Harwood, Anna Nicolaou
Ceramides are important for skin health, with a multitude of species found in both dermis and epidermis. The epidermis contains linoleic acid-Ester-linked Omega-hydroxylated ceramides of 6-Hydroxy-sphingosine, Sphingosine and Phytosphingosine bases (CER[EOH], CER[EOS] and CER[EOP], respectively), that are crucial for the formation of the epidermal barrier, conferring protection from environmental factors and preventing trans-epidermal water loss. Furthermore, a large number of ceramides, derivatives of the same sphingoid bases and various fatty acids, are produced by dermal and epidermal cells and perform signalling roles in cell functions ranging from differentiation to apoptosis...
March 21, 2017: Biochimica et Biophysica Acta
https://www.readbyqxmd.com/read/28329927/-lagged-effects-of-diurnal-temperature-range-on-mortality-in-66-cities-in-china-a-time-series-study
#16
Y Q Zhao, L J Wang, Y Luo, P Yin, Z J Huang, T Liu, H L Lin, J P Xiao, X Li, W L Zeng, W J Ma, M G Zhou
Objective: To estimate the effect of daily diurnal temperature range (DTR) on mortality in different areas in China. Methods: A time series study using the data collected from 66 areas in China was conducted, and Meta-analysis was used to analyze the estimates of associations between DTR and daily mortality. Modifying effects of extremely low and high DTR-mortality relationship by season and socioeconomic status (SES) were also evaluated respectively. Cumulative excess risk (CER) was used as an index to evaluate the effects...
March 10, 2017: Zhonghua Liu Xing Bing Xue za Zhi, Zhonghua Liuxingbingxue Zazhi
https://www.readbyqxmd.com/read/28320857/regulation-of-very-long-acyl-chain-ceramide-synthesis-by-acyl-coa-binding-protein
#17
Natalia Santos Ferreira, Hanne Engelsby, Ditte Neess, Samuel L Kelly, Giora Volpert, Alfred H Merrill, Anthony H Futerman, Nils J Faergeman
Ceramide and more complex sphingolipids constitute a diverse group of lipids, which serve important roles as structural entities of biological membranes and as regulators of cellular growth, differentiation, and development. Thus, ceramides are vital players in numerous diseases including metabolic and cardiovascular diseases as well as neurological disorders. Here we show that acyl coenzyme A binding protein (ACBP) potently facilitates very-long acyl chain ceramide synthesis. ACBP increases the activity of ceramide synthase 2 (CerS2) by more than 2-fold and CerS3 activity by 7-fold...
March 19, 2017: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/28319722/bisphenol-s-exposure-modulate-macrophage-phenotype-as-defined-by-cytokines-profiling-global-metabolomics-and-lipidomics-analysis
#18
Chao Zhao, Zhi Tang, Jiacheng Yan, Jing Fang, Hailin Wang, Zongwei Cai
As an important structural analogue of bisphenol A (BPA), bisphenol S (BPS) has been used as alternatives to BPA in industrialized production. However, the immunotoxicity of BPS remains poorly understood. As a critical model in inflammatory responses, macrophages are used to explore the immunotoxic potential and mechanisms of BPS at environmentally relevant concentrations in our study. Here, we are combining molecular toxicology and mass spectrometry (MS)-based global metabolomics and lipidomics study together to estimate the variation of cytokines profiling and metabolism characteristic following BPS exposure...
March 17, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28297799/-a-serum-lipidomic-study-of-patients-with-non-alcoholic-fatty-liver-disease
#19
R X Yang, C X Hu, Y Q Mi, W L Sun, G Y Chen, Q Pan, F Shen, G W Xu, J G Fan
Objective: To investigate the serum lipidomic profile in patients with nonalcoholic fatty liver disease (NAFLD), and to analyze the lipid metabolism characteristics of NAFLD. Methods: The subjects were divided into control group (23 patients) and pathologically confirmed NAFLD group (42 patients), and ultra-high-performance liquid chromatography-tandem mass spectrometry was used to measure serum lipidomic metabolites. The partial least squares-discriminant analysis (PLS-DA) model was established to analyze the differences in lipid metabolism with reference to the univariate analysis...
February 20, 2017: Zhonghua Gan Zang Bing za Zhi, Zhonghua Ganzangbing Zazhi, Chinese Journal of Hepatology
https://www.readbyqxmd.com/read/28258370/characterization-and-genetic-mapping-of-the-%C3%AE-diketone-deficient-eceriferum-b-barley-mutant
#20
Qin Zhou, Chao Li, Kohei Mishina, Jiecai Zhao, Jiwei Zhang, Ruijun Duan, Xiaoying Ma, Aidong Wang, Qianxiang Meng, Takao Komatsuda, Guoxiong Chen
The barley eceriferum-b.2 (cer-b.2) mutant produces glossy leaf sheaths and is deficient in the cuticular wax component 14,16-hentriacontanedione. The mutated gene maps to a 1.3-cM interval on chromosome 3HL flanked by the genes MLOC_10972 and MLOC_69561. The cuticular wax coating of leaves and stems in many grass species is responsible for the plants' glaucous appearance. A major component of the wax is a group of β-diketone compounds. The barley eceriferum-b.2 (cer-b.2) mutant produces glossy leaf sheaths and is deficient for the compound 14,16-hentriacontanedione...
March 3, 2017: TAG. Theoretical and Applied Genetics. Theoretische und Angewandte Genetik
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