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https://www.readbyqxmd.com/read/28549212/synthesis-of-four-monoterpene-derived-organosulfates-and-their-quantification-in-atmospheric-aerosol-samples
#1
Yuchen Wang, Jingyun Ren, X H Hilda Huang, Rongbiao Tong, Jian Zhen Yu
Monoterpenes, a major class of biogenic volatile organic compounds, are known to produce oxidation products that further react with sulfate to form organosulfates. The accurate quantification of monoterpene-derived organosulfates (OSs) is necessary for quantifying this controllable aerosol source; however, it has been hampered by a lack of authentic standards. Here we report a unified synthesis strategy starting from the respective monoterpene through Upjohn dihydroxylation or Sharpless asymmetric dihydroxylation followed by mono-sulfation with sulfur trioxide-pyridine complex...
May 26, 2017: Environmental Science & Technology
https://www.readbyqxmd.com/read/28548626/correlates-of-protection-for-inactivated-enterovirus-71-vaccine-the-analysis-of-immunological-surrogate-endpoints
#2
Wenbo Zhu, Pengfei Jin, Jing-Xin Li, Feng-Cai Zhu, Pei Liu
BACKGROUND: Inactivated Enterovirus 71 (EV71) vaccines showed significant efficacy against the diseases associated with EV71 and a neutralizing antibody (NTAb) titer of 1:16-1:32 was suggested as the correlates of the vaccine protection. This paper aims to further estimate the immunological surrogate endpoints for the protection of inactivated EV71 vaccines and the effect factors. METHOD: Pre-vaccination NTAb against EV71 at baseline (day 0), post-vaccination NTAb against EV71 at day 56, and the occurrence of laboratory-confirmed EV71-associated diseases during a 24-months follow-up period were collected from a phase 3 efficacy trial of an inactivated EV71 vaccine...
May 26, 2017: Expert Review of Vaccines
https://www.readbyqxmd.com/read/28548303/scalloped-tongue-is-associated-with-nocturnal-intermittent-hypoxia-among-community-dwelling-japanese-the-toon-health-study
#3
Kiyohide Tomooka, Takeshi Tanigawa, Susumu Sakurai, Koutatsu Maruyama, Eri Eguchi, Shinji Nishioka, Noriko Miyoshi, Hiroshi Kakuto, Genki Shimizu, Denichiro Yamaoka, Isao Saito
BACKGROUND: Scalloped tongue is considered as a possible clinical finding of obstructive sleep apnea (OSA). There are few evidence of the association between scalloped tongue and OSA. OBJECTIVE: To examine the association between scalloped tongue and nocturnal intermittent hypoxia (NIH), a surrogate marker of OSA, among a general Japanese population. METHODS: Study participants were 398 men and 732 women aged 30-79 years who participated in the Toon Health Study from 2011 to 2014...
May 26, 2017: Journal of Oral Rehabilitation
https://www.readbyqxmd.com/read/28546657/statins-reduce-lipopolysaccharide-induced-cytokine-and-inflammatory-mediator-release-in-an-in-vitro-model-of-microglial-like-cells
#4
A J McFarland, A K Davey, S Anoopkumar-Dukie
The anti-inflammatory effects of statins (HMG-CoA reductase inhibitors) within the cardiovascular system are well-established; however, their neuroinflammatory potential is unclear. It is currently unknown whether statins' neurological effects are lipid-dependent or due to pleiotropic mechanisms. Therefore, the assumption that all statin compounds will have the same effect within the central nervous system is potentially inappropriate, with no studies to date having compared all statins in a single model. Thus, the aim of this study was to compare the effects of the six statins (atorvastatin, fluvastatin, pitavastatin, pravastatin, rosuvastatin, and simvastatin) within a single in vitro model of neuroinflammation...
2017: Mediators of Inflammation
https://www.readbyqxmd.com/read/28546061/primary-biliary-cholangitis-advances-in-management-and-treatment-of-the-disease
#5
Pietro Invernizzi', Annarosa Floreani, Marco Carbone, Marco Marzioni, Antonio Craxi, Luigi Muratori, Umberto Vespasiani Gentilucci, Ivan Gardini, Antonio Gasbarrini, Paola Krugeri, Francesco Saverio Mennini, Virginia Ronco, Elena Lanati, Pier Luigi Canonico, Domenico Alvaro
Primary Biliary Cholangitis, previously known as Primary Biliary Cirrhosis, is a rare disease, which mainly affects women in their fifth to seventh decades of life. It is a chronic autoimmune disease characterized by a progressive damage of interlobular bile ducts leading to ductopenia, chronic cholestasis and bile acids retention. Even if the disease usually presents a long asymptomatic phase and a slow progression, in many patients it may progress faster toward cirrhosis and its complications. The 10year mortality is greater than in diseases such as human immunodeficiency virus/Hepatitis C Virus coinfection and breast cancer...
May 8, 2017: Digestive and Liver Disease
https://www.readbyqxmd.com/read/28545974/development-of-5-hydroxypyrazole-derivatives-as-reversible-inhibitors-of-lysine-specific-demethylase-1
#6
Daniel P Mould, Ulf Bremberg, Allan M Jordan, Matthis Geitmann, Alba Maiques-Diaz, Alison E McGonagle, Helen F Small, Tim C P Somervaille, Donald Ogilvie
A series of reversible inhibitors of lysine specific demethylase 1 (LSD1) with a 5-hydroxypyrazole scaffold have been developed from compound 7, which was identified from the patent literature. Surface plasmon resonance (SPR) and biochemical analysis showed it to be a reversible LSD1 inhibitor with an IC50 value of 0.23µM. Optimisation of this compound by rational design afforded compounds with Kd values of <10nM. In human THP-1 cells, these compounds were found to upregulate the expression of the surrogate cellular biomarker CD86...
May 8, 2017: Bioorganic & Medicinal Chemistry Letters
https://www.readbyqxmd.com/read/28545126/pheromone-sensing-neurons-regulate-peripheral-lipid-metabolism-in-caenorhabditis-elegans
#7
Rosalind Hussey, Jon Stieglitz, Jaleh Mesgarzadeh, Tiffany T Locke, Ying K Zhang, Frank C Schroeder, Supriya Srinivasan
It is now established that the central nervous system plays an important role in regulating whole body metabolism and energy balance. However, the extent to which sensory systems relay environmental information to modulate metabolic events in peripheral tissues has remained poorly understood. In addition, it has been challenging to map the molecular mechanisms underlying discrete sensory modalities with respect to their role in lipid metabolism. In previous work our lab has identified instructive roles for serotonin signaling as a surrogate for food availability, as well as oxygen sensing, in the control of whole body metabolism...
May 18, 2017: PLoS Genetics
https://www.readbyqxmd.com/read/28545049/first-cloned-bactrian-camel-camelus-bactrianus-calf-produced-by-interspecies-somatic-cell-nuclear-transfer-a-step-towards-preserving-the-critically-endangered-wild-bactrian-camels
#8
Nisar Ahmad Wani, Binoy S Vettical, Seung B Hong
Studies were conducted to explore the possibility of employing dromedary camel (Camelus dromedarius) oocytes as recipient cytoplasts for the development of interspecies somatic cell nuclear transfer (iSCNT) embryos using skin fibroblast cells of an adult Bactrian camel (Camelus bactrianus) and Llama (Llama glama) as donor nuclei. Also, the embryos reconstructed with Bactrian cells were transferred into the uterus of synchronized dromedary camel recipients to explore the possibility of using them as surrogate mothers...
2017: PloS One
https://www.readbyqxmd.com/read/28544622/an-investigation-into-the-two-stage-meta-analytic-copula-modelling-approach-for-evaluating-time-to-event-surrogate-endpoints-which-comprise-of-one-or-more-events-of-interest
#9
Natalie Dimier, Susan Todd
Clinical trials of experimental treatments must be designed with primary endpoints that directly measure clinical benefit for patients. In many disease areas, the recognised gold standard primary endpoint can take many years to mature, leading to challenges in the conduct and quality of clinical studies. There is increasing interest in using shorter-term surrogate endpoints as substitutes for costly long-term clinical trial endpoints; such surrogates need to be selected according to biological plausibility, as well as the ability to reliably predict the unobserved treatment effect on the long-term endpoint...
May 19, 2017: Pharmaceutical Statistics
https://www.readbyqxmd.com/read/28544422/assessment-of-clinically-relevant-bleeding-as-a-surrogate-outcome-for-major-bleeding-validation-by-meta-analysis-of-randomized-controlled-trials
#10
S Laporte, C Chapelle, L Bertoletti, E Ollier, P Zufferey, J-C Lega, A Merah, H Décousus, S Schulman, G Meyer, M Cucherat, P Mismetti
BACKGROUND: Clinically relevant bleeding (CRB), comprising major bleeding and clinically relevant non-major bleeding, has been used as a surrogate for major bleeding in most anticoagulant trials, but its validity for estimating compromise between thrombotic and bleeding events has never been assessed. METHODS: We systematically reviewed randomized phase III trials comparing new anticoagulants with standard of care for venous thromboembolism prevention following major orthopedic surgery, venous thromboembolism (VTE) treatment, or stroke and systemic embolism prevention in atrial fibrillation (AF), and reporting both major bleeding and CRB rates...
May 20, 2017: Journal of Thrombosis and Haemostasis: JTH
https://www.readbyqxmd.com/read/28544156/m2bpgi-as-a-potential-diagnostic-tool-of-cirrhosis-in-chinese-patients-with-hepatitis-b-virus-infection
#11
Bin Wei, Shu Feng, Enqiang Chen, Dongdong Li, Tingting Wang, Yu Gou, Tingting Yang, Dongmei Zhang, Chuanmin Tao, Hong Tang
BACKGROUND: M2BPGi is a novel serum glycobiomarker of liver fibrosis. In this study, we aimed to evaluate the efficacy of M2BPGi for predicting liver fibrosis and disease progression in Chinese hepatitis B virus (HBV) infected patients. METHODS: We enrolled 228 HBV infected patients with different status of liver fibrosis diagnosed using FibroScan. We analyzed the diagnostic accuracy of M2BPGi, and compared it with AST-to-platelet ratio (APRI), FIB-4 index, AST to ALT ratio (AAR), and RDW to platelet ratio (RPR)...
May 24, 2017: Journal of Clinical Laboratory Analysis
https://www.readbyqxmd.com/read/28543403/decellularized-human-liver-is-too-heterogeneous-for-designing-a-generic-extracellular-matrix-mimic-hepatic-scaffold
#12
Giorgio Mattei, Chiara Magliaro, Andrea Pirone, Arti Ahluwalia
Decellularized human livers are considered the perfect extracellular matrix (ECM) surrogate because both three-dimensional architecture and biological features of the hepatic microenvironment are thought to be preserved. However, donor human livers are in chronically short supply, both for transplantation or as decellularized scaffolds, and will become even scarcer as life expectancy increases. It is hence of interest to determine the structural and biochemical properties of human hepatic ECM to derive design criteria for engineering biomimetic scaffolds...
May 23, 2017: Artificial Organs
https://www.readbyqxmd.com/read/28542984/applying-quantitative-molecular-tools-for-virus-transport-studies-opportunities-and-challenges
#13
Kelvin Wong, Marirosa Molina
Bacteriophages have been used in soil column studies for the last several decades as surrogates to study the fate and transport behavior of enteric viruses in groundwater. However, recent studies have shown that the transport behavior of bacteriophages and enteric viruses in porous media can be very different. The next generation of virus transport science must therefore provide more data on mobility of enteric viruses and the relationship between transport behaviors of enteric viruses and bacteriophages. To achieve this new paradigm, labor intensity devoted to enteric virus quantification method must be reduced...
May 23, 2017: Ground Water
https://www.readbyqxmd.com/read/28541959/longitudinal-correlation-of-ellipsoid-zone-loss-and-functional-loss-in-macular-telangiectasia-type-2
#14
Tjebo F C Heeren, Diána Kitka, Daniela Florea, Traci E Clemons, Emily Y Chew, Alan C Bird, Daniel Pauleikhoff, Peter Charbel Issa, Frank G Holz, Tunde Peto
PURPOSE: To compare ellipsoid zone (EZ) loss and functional loss in macular telangiectasia (MacTel) type 2 longitudinally. METHODS: Prospective natural history study. Ellipsoid zone loss was measured in en-face images created from spectral domain optical coherence tomography. Functional loss was assessed by best-corrected visual acuity and microperimetry, counting the number of test points with impaired function. RESULTS: A total of 56 eyes of 31 participants were followed for 4...
May 24, 2017: Retina
https://www.readbyqxmd.com/read/28541788/addressing-hereditary-cancer-risk-at-the-end-of-life
#15
Eric J Roeland, Alexandra D Dullea, Chelsea H Hagmann, Lisa Madlensky
Oncology guidelines clearly outline evidence-based recommendations for patients with newly diagnosed cancer to help oncologists determine which patients are appropriate for a genetic assessment. Ideally, patients with newly diagnosed cancer, who have personal or family histories suggestive of hereditary cancer predisposition, are referred for genetics work up in the nonurgent setting. However, in some cases, a genetics work up is delayed until the end of life. This is a time of heightened stress and additional obstacles, including discordance between family members regarding the obtainment of genetic information, paying for testing, selecting a surrogate to receive and disperse information in the case of a patient's death, and the use of DNA banking for future evaluation...
May 25, 2017: Journal of Oncology Practice
https://www.readbyqxmd.com/read/28540938/a-deciduous-directing-group-approach-for-the-addition-of-aryl-and-vinyl-nucleophiles-to-maleimides
#16
Kiran R Bettadapur, Veeranjaneyulu Lanke, Kandikere Ramaiah Prabhu
A Rh(iii)-catalyzed C-H activation followed by conjugate addition to maleimides, using carboxylic acid as a traceless/deciduous directing group, to formally furnish a Csp(2)-Csp(3) bond is presented. For the first time, derivatives of acrylic acid have been shown as surrogates for the unstable and expensive alkenyl boronic acids.
May 25, 2017: Chemical Communications: Chem Comm
https://www.readbyqxmd.com/read/28540820/theoretical-model-for-laser-ablation-outcome-predictions-in-brain-calibration-and-validation-on-clinical-mr-thermometry-images
#17
Samuel John Fahrenholtz, Reza Madankan, Shabbar Danish, John D Hazle, R Jason Stafford, David Fuentes
PURPOSE: Neurosurgical laser ablation is experiencing a renaissance. Computational tools for ablation planning aim to further improve the intervention. Here, global optimisation and inverse problems are demonstrated to train a model that predicts maximum laser ablation extent. METHODS: A closed-form steady state model is trained on and then subsequently compared to N = 20 retrospective clinical MR thermometry datasets. Dice similarity coefficient (DSC) is calculated to provide a measure of region overlap between the 57 °C isotherms of the thermometry data and the model-predicted ablation regions; 57 °C is a tissue death surrogate at thermal steady state...
May 19, 2017: International Journal of Hyperthermia
https://www.readbyqxmd.com/read/28540417/monitoring-early-response-to-chemoradiotherapy-with-18-f-fmiso-dynamic-pet-in-head-and-neck-cancer
#18
Milan Grkovski, Nancy Y Lee, Heiko Schöder, Sean D Carlin, Bradley J Beattie, Nadeem Riaz, Jonathan E Leeman, Joseph A O'Donoghue, John L Humm
PURPOSE: There is growing recognition that biologic features of the tumor microenvironment affect the response to cancer therapies and the outcome of cancer patients. In head and neck cancer (HNC) one such feature is hypoxia. We investigated the utility of (18)F-fluoromisonidazole (FMISO) dynamic positron emission tomography (dPET) for monitoring the early microenvironmental response to chemoradiotherapy in HNC. EXPERIMENTAL DESIGN: Seventy-two HNC patients underwent FMISO dPET scans in a customized immobilization mask (0-30 min dynamic acquisition, followed by 10 min static acquisitions starting at ∼95 min and ∼160 min post-injection) at baseline and early into treatment where patients have already received one cycle of chemotherapy and anywhere from five to ten fractions of 2 Gy per fraction radiation therapy...
May 24, 2017: European Journal of Nuclear Medicine and Molecular Imaging
https://www.readbyqxmd.com/read/28540211/delayed-enhancement-cardiac-computed-tomography-for-the-assessment-of-myocardial-infarction-from-bench-to-bedside
#19
REVIEW
Gaston A Rodriguez-Granillo
A large number of studies support the increasingly relevant prognostic value of the presence and extent of delayed enhancement (DE), a surrogate marker of fibrosis, in diverse etiologies. Gadolinium and iodinated based contrast agents share similar kinetics, thus leading to comparable myocardial characterization with cardiac magnetic resonance (CMR) and cardiac computed tomography (CT) at both first-pass perfusion and DE imaging. We review the available evidence of DE imaging for the assessment of myocardial infarction (MI) using cardiac CT (CTDE), from animal to clinical studies, and from 16-slice CT to dual-energy CT systems (DECT)...
April 2017: Cardiovascular Diagnosis and Therapy
https://www.readbyqxmd.com/read/28539889/baroreflex-coupling-assessed-by-cross-compression-entropy
#20
Andy Schumann, Steffen Schulz, Andreas Voss, Susann Scharbrodt, Mathias Baumert, Karl-Jürgen Bär
Estimating interactions between physiological systems is an important challenge in modern biomedical research. Here, we explore a new concept for quantifying information common in two time series by cross-compressibility. Cross-compression entropy (CCE) exploits the ZIP data compression algorithm extended to bivariate data analysis. First, time series are transformed into symbol vectors. Symbols of the target time series are coded by the symbols of the source series. Uncoupled and linearly coupled surrogates were derived from cardiovascular recordings of 36 healthy controls obtained during rest to demonstrate suitability of this method for assessing physiological coupling...
2017: Frontiers in Physiology
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