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https://www.readbyqxmd.com/read/28734271/development-and-validation-of-sensitive-lc-ms-ms-method-for-the-quantification-of-suvn-502-and-its-metabolite-and-its-application-for-first-in-human-pharmacokinetic-study
#1
Ramakrishna Nirogi, Devender Reddy Ajjala, Raghupathi Aleti, Lakshmiprasanna Rayapati, Hanumanth Rao Pantangi, Rajesh Kumar Boggavarapu, Naga Surya Prakash Padala
A sensitive and rapid LC-MS/MS method was developed and validated for the quantification of SUVN-502 and M1 of SUVN-502, a 5-HT6 receptor antagonist for the treatment of dementia associated with Alzheimer's disease. Following solid-phase extraction, SUVN-502 and M1 of SUVN-502 and IS were eluted with 10mM ammonium acetate (pH 4.0) and acetonitrile using a rapid gradient program on reverse phase column. Multiple reaction monitoring mode was used to monitor the respective transitions of m/z 478.2→377.7 for SUVN-502 and m/z 464...
April 14, 2017: Journal of Pharmaceutical and Biomedical Analysis
https://www.readbyqxmd.com/read/28734226/inhibition-of-prb-pathway-differentially-modulates-apoptosis-in-esophageal-cancer-cells
#2
Rossana C Soletti, Deborah Biasoli, Nathassya A L V Rodrigues, João M A Delou, Renata Maciel, Vera L A Chagas, Rodrigo A P Martins, Stevens K Rehen, Helena L Borges
Esophageal cancer is the sixth most common cause of cancer-related death worldwide. Current chemotherapy regimens include a combination of 5-fluorouracil (5-FU) and cisplatin, but more efficient therapy strategies are needed to increase 5-year survival. Alterations in the signaling pathway of the tumor suppressor gene Rb-1, which encodes a phosphoprotein (pRB) that negatively regulates the G1/S transition of the cell cycle, are present in 70% of all tumors, but its role in esophageal cancer is still unclear...
July 19, 2017: Translational Oncology
https://www.readbyqxmd.com/read/28734210/effects-analysis-of-substituent-characteristics-and-solvents-on-the-photodegradation-of-polybrominated-diphenyl-ethers
#3
Long Jiang, Youli Qiu, Yu Li
The ultraviolet spectra and electron transition information of 209 polybrominated diphenyl ethers (PBDEs) in gas were first calculated via time-dependent density functional theory using Gaussian 09 software. The main and second-order interactional effects of substituent characteristics on the photodegradation of PBDEs were then analysed using a full factorial experimental design. Solvent effects were considered to research the effect and promotion mechanism of solvent molecules on the photodegradation of PBDEs compared with that in gas...
July 14, 2017: Chemosphere
https://www.readbyqxmd.com/read/28734159/development-of-a-lc-ms-ms-method-for-the-determination-of-ckd-712-in-rat-plasma-application-to-a-pharmacokinetic-study-in-rats
#4
Jung-Woo Chae, Hwi-Yeol Yun, Han Young Eom, Eun Ju Jeong, Tae-Sung Koo, Kwang-Il Kwon, Jong-Hwa Lee
CKD-712 is a potential treatment for sepsis, as it exhibits protective effects against lipopolysaccharide-mediated platelet aggregation, inducible nitric oxide synthase expression, and cecum-ligation puncture-induced septic mortality in mice. In this study, we develop a rapid and sensitive LC-MS/MS method for determining CKD-712 in rat plasma. CKD-712 and papaverine hydrochloride (an internal standard) were analyzed using an LC-MS/MS system consisting of an Agilent HPLC system (HP-1100) equipped with an Atlantis HILIC Silica (2...
July 8, 2017: Journal of Chromatography. B, Analytical Technologies in the Biomedical and Life Sciences
https://www.readbyqxmd.com/read/28734149/discharge-management-strategies-and-post-discharge-care-interventions-for-depression-systematic%C3%A2-review-and-meta-analysis
#5
REVIEW
F Holzinger, S Fahrenkrog, S Roll, F Kleefeld, M Adli, C Heintze
BACKGROUND: Patients with depression require treatment continuity when discharged from inpatient care. Interventions aimed at optimizing transition into outpatient care may be effective in preventing symptom deterioration and readmission. We aimed to evaluate the effectiveness of care transition interventions for patients with depression after psychiatric hospitalization. METHODS: Systematic review and random-effects meta-analysis of controlled trials. Primary outcomes were readmissions and symptoms of depression...
July 11, 2017: Journal of Affective Disorders
https://www.readbyqxmd.com/read/28734128/the-experience-of-initiating-injection-drug-use-and-its-social-context-a-qualitative-systematic-review-and-thematic-synthesis
#6
REVIEW
Andy Guise, Danielle Horyniak, Jason Melo, Ryan McNeill, Dan Werb
BACKGROUND AND AIM: Understanding the experience of initiating injection drug use and its social contexts is crucial to inform efforts to prevent transitions into this mode of drug consumption and support harm reduction. We systematically reviewed and synthesized existing qualitative scientific literature to identify the socio-structural contexts for, and experiences of, the initiation of injection drug use. METHODS: We systematically searched six databases (Medline, Embase, PsychINFO, CINAHL, IBSS, and SSCI), along with a manual search, including of key journals and subject experts...
July 22, 2017: Addiction
https://www.readbyqxmd.com/read/28734126/german-estsmoke-estimating-adult-smoking-related-costs-and-consequences-of-smoking-cessation-for-germany
#7
Diana Sonntag, Simon Gilbody, Winkler Volker, Shehzad Ali
AIMS: We compared predicted lifetime health care costs for current, never and ex-smokers in Germany under the current set of tobacco control polices. We compared these economic consequences of the current situation with an alternative in which Germany were to implement more comprehensive tobacco control policies consistent with the WHO Framework Convention for Tobacco Control (FCTC) guidelines. DESIGN: German EstSmoke, an adapted version of the UK EstSmoke simulation model, applies the Markov modelling approach...
July 22, 2017: Addiction
https://www.readbyqxmd.com/read/28732366/rassf6-downregulation-promotes-the-epithelial-mesenchymal-transition-and-predicts-poor-prognosis-in-colorectal-cancer
#8
Rui Zhou, Lin Qiu, Xiaolong Liu, Lijuan Ling, Ninglei Li, Kun Zhou, Jingbo Sun, Jian Yan, Canliang Tan, Xiaoping Huang, Luzhe Han, Liangchun Yin, Gang Xiao, Lixin Liu
Distant metastasis is the primary barrier for the successful treatment of patients with colorectal cancer, and thus, searching for new therapeutic targets by further exploring the molecular mechanisms of colorectal cancer metastasis is important. In this study, we investigated the biological and clinical significance of RASSF6 in colorectal cancer as well as the underlying molecular mechanisms. We found that low RASSF6 expression corresponds to a poor prognosis in colorectal cancer patients, and low RASSF6 expression is distinctly associated with tumour progression...
July 12, 2017: Oncotarget
https://www.readbyqxmd.com/read/28732069/saccharomyces-boulardii-cncm-i-745-supplementation-reduces-gastrointestinal-dysfunction-in-an-animal-model-of-ibs
#9
Paola Brun, Melania Scarpa, Chiara Marchiori, Gloria Sarasin, Valentina Caputi, Andrea Porzionato, Maria Cecilia Giron, Giorgio Palù, Ignazio Castagliuolo
BACKGROUND: We evaluated the effect of Saccharomyces boulardii CNCM I-745 on intestinal neuromuscular anomalies in an IBS-type mouse model of gastrointestinal motor dysfunctions elicited by Herpes Simplex Virus type 1 (HSV-1) exposure. METHODS: Mice were inoculated intranasally with HSV-1 (102 PFU) or vehicle at time 0 and 4 weeks later by the intragastric (IG) route (108 PFU). Six weeks after IG inoculum, mice were randomly allocated to receive oral gavage with either S...
2017: PloS One
https://www.readbyqxmd.com/read/28732041/understanding-russell-s-viper-venom-factor-v-activator-s-substrate-specificity-by-surface-plasmon-resonance-and-in-silico-studies
#10
Pradeep K Yadav, Christian B Antonyraj, Syed Ibrahim Basheer Ahamed, Sistla Srinivas
Blood coagulation factor V (FV) is activated either by Factor X or thrombin, cleaving at three different sites viz., Site I (Arg709-Ser710), site II (Arg1018-Thr1019), and site III (Arg1545-Ser1546). Russell's viper venom factor V activator (RVV-V) is a thrombin-like serine proteinase that activates FV with selective, single cleavage at site III. A long lasting effort is being pending in understanding the 'selective' binding specificity of the RVV-V towards site III. Here, we present the binding kinetic study of RVV-V with two designed peptides corresponding to the regions from site I (Gln699-Asn713) and site II (1008Lys-Pro1022), respectively, that include 15 amino acids...
2017: PloS One
https://www.readbyqxmd.com/read/28732039/abnormal-meiosis-in-an-intersectional-allotriploid-of-populus-l-and-segregation-of-ploidy-levels-in-2x-%C3%A3-3x-progeny
#11
Jun Wang, Beibei Huo, Wanting Liu, Daili Li, Ling Liao
Triploid plants are usually highly aborted owing to unbalanced meiotic chromosome segregation, but limited viable gametes can participate in the transition to different ploidy levels. In this study, numerous meiotic abnormalities were found with high frequency in an intersectional allotriploid poplar (Populus alba × P. berolinensis 'Yinzhong'), including univalents, precocious chromosome migration, lagging chromosomes, chromosome bridges, micronuclei, and precocious cytokinesis, indicating high genetic imbalance in this allotriploid...
2017: PloS One
https://www.readbyqxmd.com/read/28731864/minimal-detectable-change-thresholds-and-responsiveness-of-zephyr-bioharness-fitbit-charge-devices
#12
Goris Nazari, Joy C MacDermid
The aim of the current study was to define the MDC thresholds for Zephyr Bioharness (ZB) and Fitbit Charge (FC-HR) heart rate variables, and to establish the internal responsiveness of ZB and FC-HR devices in terms of their heart rate, respiratory rate variables and number of steps taken variables, in a healthy sample of males and females at resting, sub-maximal activity and throughout recovery phases. A total of sixty participants (30 females, 48 ± 15) and (30 males, 48 ± 15) were recruited using stratified convenience and snowball sampling approaches from our university student, staff and faculty population...
July 18, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28731792/the-evolution-of-energetic-scaling-across-the-vertebrate-tree-of-life
#13
Josef C Uyeda, Matthew W Pennell, Eliot T Miller, Rafael Maia, Craig R McClain
Metabolism is the link between ecology and physiology-it dictates the flow of energy through individuals and across trophic levels. Much of the predictive power of metabolic theories of ecology derives from the scaling relationship between organismal size and metabolic rate. There is growing evidence that this scaling relationship is not universal, but we have little knowledge of how it has evolved over macroevolutionary time. Here we develop a novel phylogenetic comparative method to investigate how often and in which clades the macroevolutionary dynamics of the metabolic scaling have changed...
August 2017: American Naturalist
https://www.readbyqxmd.com/read/28731769/first-principles-prediction-of-spin-polarized-multiple-dirac-rings-in-manganese-fluoride
#14
Yalong Jiao, Fengxian Ma, Chunmei Zhang, John Bell, Stefano Sanvito, Aijun Du
Spin-polarized materials with Dirac features have sparked great scientific interest due to their potential applications in spintronics. But such a type of structure is very rare and none has been fabricated. Here, we investigate the already experimentally synthesized manganese fluoride (MnF_{3}) as a novel spin-polarized Dirac material by using first-principles calculations. MnF_{3} exhibits multiple Dirac cones in one spin orientation, while it behaves like a large gap semiconductor in the other spin channel...
July 7, 2017: Physical Review Letters
https://www.readbyqxmd.com/read/28731766/observing-dissipative-topological-defects-with-coupled-lasers
#15
Vishwa Pal, Chene Tradonsky, Ronen Chriki, Asher A Friesem, Nir Davidson
Topological defects have been observed and studied in a wide range of systems, such as cosmology, spin systems, cold atoms, and optics, as they are quenched across a phase transition into an ordered state. These defects limit the coherence of the system and its ability to approach a fully ordered state, so revealing their origin and control is becoming an increasingly important field of research. We observe dissipative topological defects in a one-dimensional ring of phased-locked lasers, and show how their formation is related to the Kibble-Zurek mechanism and is governed in a universal manner by two competing time scales...
July 7, 2017: Physical Review Letters
https://www.readbyqxmd.com/read/28731756/stochastic-chaos-in-a-turbulent-swirling-flow
#16
D Faranda, Y Sato, B Saint-Michel, C Wiertel, V Padilla, B Dubrulle, F Daviaud
We report the experimental evidence of the existence of a random attractor in a fully developed turbulent swirling flow. By defining a global observable which tracks the asymmetry in the flux of angular momentum imparted to the flow, we can first reconstruct the associated turbulent attractor and then follow its route towards chaos. We further show that the experimental attractor can be modeled by stochastic Duffing equations, that match the quantitative properties of the experimental flow, namely, the number of quasistationary states and transition rates among them, the effective dimensions, and the continuity of the first Lyapunov exponents...
July 7, 2017: Physical Review Letters
https://www.readbyqxmd.com/read/28731752/novel-pd_-2-se_-3-two-dimensional-phase-driven-by-interlayer-fusion-in-layered-pdse_-2
#17
Junhao Lin, Sebastian Zuluaga, Peng Yu, Zheng Liu, Sokrates T Pantelides, Kazu Suenaga
Two-dimensional (2D) materials are easily fabricated when their bulk form has a layered structure. The monolayer form in layered transition-metal dichalcogenides is typically the same as a single layer of the bulk material. However, PdSe_{2} presents a puzzle. Its monolayer form has been theoretically shown to be stable, but there have been no reports that monolayer PdSe_{2} has been fabricated. Here, combining atomic-scale imaging in a scanning transmission electron microscope and density functional theory, we demonstrate that the preferred monolayer form of this material amounts to a melding of two bulk monolayers accompanied by the emission of Se atoms so that the resulting stoichiometry is Pd_{2}Se_{3}...
July 7, 2017: Physical Review Letters
https://www.readbyqxmd.com/read/28731748/characterizing-time-irreversibility-in-disordered-fermionic-systems-by-the-effect-of-local-perturbations
#18
Shreya Vardhan, Giuseppe De Tomasi, Markus Heyl, Eric J Heller, Frank Pollmann
We study the effects of local perturbations on the dynamics of disordered fermionic systems in order to characterize time irreversibility. We focus on three different systems: the noninteracting Anderson and Aubry-André-Harper (AAH) models and the interacting spinless disordered t-V chain. First, we consider the effect on the full many-body wave functions by measuring the Loschmidt echo (LE). We show that in the extended or ergodic phase the LE decays exponentially fast with time, while in the localized phase the decay is algebraic...
July 7, 2017: Physical Review Letters
https://www.readbyqxmd.com/read/28731736/enhancing-entropy-and-enthalpy-fluctuations-to-drive-crystallization-in-atomistic-simulations
#19
Pablo M Piaggi, Omar Valsson, Michele Parrinello
Crystallization is a process of great practical relevance in which rare but crucial fluctuations lead to the formation of a solid phase starting from the liquid. As in all first order first transitions, there is an interplay between enthalpy and entropy. Based on this idea, in order to drive crystallization in molecular simulations, we introduce two collective variables, one enthalpic and the other entropic. Defined in this way, these collective variables do not prejudge the structure into which the system is going to crystallize...
July 7, 2017: Physical Review Letters
https://www.readbyqxmd.com/read/28731735/critical-time-crystals-in-dipolar-systems
#20
Wen Wei Ho, Soonwon Choi, Mikhail D Lukin, Dmitry A Abanin
We analyze the quantum dynamics of periodically driven, disordered systems in the presence of long-range interactions. Focusing on the stability of discrete time crystalline (DTC) order in such systems, we use a perturbative procedure to evaluate its lifetime. For 3D systems with dipolar interactions, we show that the corresponding decay is parametrically slow, implying that robust, long-lived DTC order can be obtained. We further predict a sharp crossover from the stable DTC regime into a regime where DTC order is lost, reminiscent of a phase transition...
July 7, 2017: Physical Review Letters
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