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https://www.readbyqxmd.com/read/29244951/interfacial-adsorption-of-neutral-and-ionic-solutes-in-a-water-droplet
#1
Patrick K Wise, Dor Ben-Amotz
Direct (solute-water) and indirect (water-water) contributions to adsorption at an air-water interface are identified using the Widom potential distribution theorem and quantified using molecular dynamics simulations of a liquid water droplet containing either neopentane or iodide-like solutes with charges of 0 or ±1. The results are used to quantitatively compare direct and indirect, energetic and entropic, contributions to adsorption, as well as to critically test surface capillary wave, linear response (LR), and mean field (MF) predictions...
December 15, 2017: Journal of Physical Chemistry. B
https://www.readbyqxmd.com/read/29241585/detection-of-velocity-and-diffusion-coefficient-change-points-in-single-particle-trajectories
#2
Shuhui Yin, Nancy Song, Haw Yang
The position-time trajectory of a biological subject moving in a complex environment contains rich information about how it interacts with the local setting. Whether the subject be an animal or an intracellular endosomal vesicle, the two primary modes of biological locomotion are directional movement and random walk, respectively characterized by velocity and diffusion coefficient. This contribution introduces a method to quantitatively divide a single-particle trajectory into segments that exhibit changes in the diffusion coefficient, velocity, or both...
December 11, 2017: Biophysical Journal
https://www.readbyqxmd.com/read/29237040/conceptual-and-computational-framework-for-logical-modelling-of-biological-networks-deregulated-in-diseases
#3
Arnau Montagud, Pauline Traynard, Loredana Martignetti, Eric Bonnet, Emmanuel Barillot, Andrei Zinovyev, Laurence Calzone
Mathematical models can serve as a tool to formalize biological knowledge from diverse sources, to investigate biological questions in a formal way, to test experimental hypotheses, to predict the effect of perturbations and to identify underlying mechanisms. We present a pipeline of computational tools that performs a series of analyses to explore a logical model's properties. A logical model of initiation of the metastatic process in cancer is used as a transversal example. We start by analysing the structure of the interaction network constructed from the literature or existing databases...
December 8, 2017: Briefings in Bioinformatics
https://www.readbyqxmd.com/read/29234238/mir-155-5p-modulates-malignant-behaviors-of-hepatocellular-carcinoma-by-directly-targeting-cthrc1-and-indirectly-regulating-gsk-3%C3%AE-involved-wnt-%C3%AE-catenin-signaling
#4
Gang Chen, Dongdong Wang, Xiongqi Zhao, Jun Cao, Yingpeng Zhao, Fan Wang, Jianhua Bai, Ding Luo, Li Li
Background: Hepatocellular carcinoma (HCC) remains one of the most lethal cancers. MicroRNA-155 (miR-155) and collagen triple helix repeat containing 1 (CTHRC1) were found to be involved in hepatocarcinogenesis, but their detailed functions in HCC are unclear. Here, we aimed to investigate the underlying role of miR-155-5p and CTHRC1 in HCC. Methods: miR-155-5p and CTHRC1 expression levels were detected by qRT-PCR, IHC and WB in HCC patients and cell lines. Dual-luciferase assay, qRT-PCR and WB were used to validate the target interaction between miR-155-5p and CTHRC1...
2017: Cancer Cell International
https://www.readbyqxmd.com/read/29233783/transcranial-direct-current-stimulation-of-20-and-30-minutes-combined-with-sertraline-for-the-treatment-of-depression
#5
Elena L Pavlova, Alexandra A Menshikova, Roman V Semenov, Ekaterina N Bocharnikova, Galina N Gotovtseva, Tatiana A Druzhkova, Anna G Gersamia, Anna A Gudkova, Alla B Guekht
BACKGROUND: Transcranial direct current stimulation (tDCS) can be an effective treatment for depression, however, the duration of the stimulation session, among other parameters, needs to be optimized. METHODS: 69 mild to moderately depressed patients (age 37.6±10.5years, 19 men) were randomized into three groups - 30-, 20-minute or sham tDCS. 10 daily sessions of anodal/sham tDCS of the left DLPFC (0.5mA; electrode 3,5×7cm) combined with 50mg/day of sertraline were performed...
December 9, 2017: Progress in Neuro-psychopharmacology & Biological Psychiatry
https://www.readbyqxmd.com/read/29233687/interferon-free-direct-acting-antiviral-therapy-for-acute-hepatitis-c-virus-infection-in-hiv-infected-individuals-a-literature-review
#6
REVIEW
Temi Lampejo, Kosh Agarwal, Ivana Carey
Dramatic rises in hepatitis C virus (HCV) coinfection rates in human immunodeficiency virus (HIV)-infected individuals have been observed recently, largely attributable to increasing recreational drug use combined with increased testing for HCV. In the era of direct-acting antiviral (DAA) therapy, treatment of acute HCV infection in HIV-infected individuals with short durations of these drugs may potentially reduce the disease and economic burden associated with HCV infection as well as reducing the likelihood of onward HCV transmission...
November 27, 2017: Digestive and Liver Disease
https://www.readbyqxmd.com/read/29233083/bootstrap-based-procedures-for-inference-in-nonparametric-receiver-operating-characteristic-curve-regression-analysis
#7
María Xosé Rodríguez-Álvarez, Javier Roca-Pardiñas, Carmen Cadarso-Suárez, Pablo G Tahoces
Prior to using a diagnostic test in a routine clinical setting, the rigorous evaluation of its diagnostic accuracy is essential. The receiver-operating characteristic curve is the measure of accuracy most widely used for continuous diagnostic tests. However, the possible impact of extra information about the patient (or even the environment) on diagnostic accuracy also needs to be assessed. In this paper, we focus on an estimator for the covariate-specific receiver-operating characteristic curve based on direct regression modelling and nonparametric smoothing techniques...
January 1, 2017: Statistical Methods in Medical Research
https://www.readbyqxmd.com/read/29232933/a-split-luciferase-reporter-recognizing-gfp-and-mcherry-tags-to-facilitate-studies-of-protein-protein-interactions
#8
Mehdi Moustaqil, Akshay Bhumkar, Laura Gonzalez, Lisa Raoul, Dominic J B Hunter, Pascal Carrive, Emma Sierecki, Yann Gambin
The use of fluorescently-tagged proteins in microscopy has become routine, and anti-GFP (Green fluorescent protein) affinity matrices are increasingly used in proteomics protocols. However, some protein-protein interactions assays, such as protein complementation assays (PCA), require recloning of each protein as a fusion with the different parts of the complementation system. Here we describe a generic system where the complementation is separated from the proteins and can be directly used with fluorescently-tagged proteins...
December 11, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/29230810/trauma-exposure-interacts-with-the-genetic-risk-of-bipolar-disorder-in-alcohol-misuse-of-us-soldiers
#9
R Polimanti, J Kaufman, H Zhao, H R Kranzler, R J Ursano, R C Kessler, M B Stein, J Gelernter
OBJECTIVE: To investigate whether trauma exposure moderates the genetic correlation between substance use disorders and psychiatric disorders, we tested whether trauma exposure modifies the association of genetic risks for mental disorders with alcohol misuse and nicotine dependence (ND) symptoms. METHODS: High-resolution polygenic risk scores (PRSs) were calculated for 10 732 US Army soldiers (8346 trauma-exposed and 2386 trauma-unexposed) based on genome-wide association studies of bipolar disorder (BD), major depressive disorder, and schizophrenia...
December 11, 2017: Acta Psychiatrica Scandinavica
https://www.readbyqxmd.com/read/29229906/direction-of-actin-flow-dictates-integrin-lfa-1-orientation-during-leukocyte-migration
#10
Pontus Nordenfelt, Travis I Moore, Shalin B Mehta, Joseph Mathew Kalappurakkal, Vinay Swaminathan, Nobuyasu Koga, Talley J Lambert, David Baker, Jennifer C Waters, Rudolf Oldenbourg, Tomomi Tani, Satyajit Mayor, Clare M Waterman, Timothy A Springer
Integrin αβ heterodimer cell surface receptors mediate adhesive interactions that provide traction for cell migration. Here, we test whether the integrin, when engaged to an extracellular ligand and the cytoskeleton, adopts a specific orientation dictated by the direction of actin flow on the surface of migrating cells. We insert GFP into the rigid, ligand-binding head of the integrin, model with Rosetta the orientation of GFP and its transition dipole relative to the integrin head, and measure orientation with fluorescence polarization microscopy...
December 11, 2017: Nature Communications
https://www.readbyqxmd.com/read/29229897/integrative-analysis-to-identify-common-genetic-markers-of-metabolic-syndrome-dementia-and-diabetes
#11
Weihong Zhang, Linlin Xin, Ying Lu
BACKGROUND Emerging data have established links between systemic metabolic dysfunction, such as diabetes and metabolic syndrome (MetS), with neurocognitive impairment, including dementia. The common gene signature and the associated signaling pathways of MetS, diabetes, and dementia have not been widely studied. MATERIAL AND METHODS We exploited the translational bioinformatics approach to choose the common gene signatures for both dementia and MetS. For this we employed "DisGeNET discovery platform". RESULTS Gene mining analysis revealed that a total of 173 genes (86 genes common to all three diseases) which comprised a proportion of 43% of the total genes associated with dementia...
December 12, 2017: Medical Science Monitor: International Medical Journal of Experimental and Clinical Research
https://www.readbyqxmd.com/read/29229526/an-oligothiophene-compound-neutralized-influenza-a-viruses-by-interfering-with-hemagglutinin
#12
Xintian Shen, Zhibo Zhu, Yi Ding, Wenjiao Wu, Jie Yang, Shuwen Liu
Background and Objectives Recently influenza pandemic outbreaks were caused by emerging H5N1H7N9 and H1N1 viruses. However, virucidal disinfectants are mainly unspecific and toxic. It is tactical to discover specific virucidal compounds. METHODS: The inhibitory potency was determined in H5N1 pseudovirus system; Interactions of compounds with hemagglutinin(HA) were detected with surface plasmon resonance (SPR) and further calculated with molecular docking. Virucidal effect was also estimated in influenza virus A/Puerto Rico/8/34(H1N1)...
December 8, 2017: Biochimica et Biophysica Acta
https://www.readbyqxmd.com/read/29228646/discordance-of-pathological-thin-melanoma-thickness-and-t-stage-in-seer-registry-impacts-on-clinical-management-and-research-directions
#13
Zhichao Wang, Haizhou Li, Xinyang Liu, Jinhong Bae, Xin Huang, Yashan Gao, Xiangwen Xu, Jihan Guo, Lin Lu, Tao Zan, Qingfeng Li
Background: Ultrathin melanoma was previously demonstrated to have higher risk for melanoma-specific mortality using SEER database. However, these guideline-changing conclusions has been recently challenged by miscoding of thickness. This present study was performed to assess the prognosis of thin and ultrathin melanoma using only surgically-treated, pathologically confirmed and after removal of discordant cases. Methods: Melanoma patients from SEER database who were initially diagnosed with histologically confirmed and surgically treated melanoma from 1998 to 2012 were included...
November 17, 2017: Oncotarget
https://www.readbyqxmd.com/read/29223708/comparison-of-neuroplastic-responses-to-cathodal-transcranial-direct-current-stimulation-and-continuous-theta-burst-stimulation-in-subacute-stroke
#14
Pierre Nicolo, Cécile Magnin, Elena Pedrazzini, Gijs Plomp, Anaïs Mottaz, Armin Schnider, Adrian G Guggisberg
OBJECTIVE: To investigate the effects of cathodal transcranial direct current stimulation (tDCS) and continuous theta burst stimulation (cTBS) on neural network connectivity and motor recovery in individuals with subacute stroke. DESIGN: Double-blinded, randomized, placebo-controlled study. SETTING: Stroke subjects recruited through a university hospital rehabilitation program. PARTICIPANTS: Stroke inpatients (N=41; mean age 65y, range 28-85; mean weeks poststroke 5, range 2-10) with resultant paresis in the upper extremity (mean Fugl-Meyer score 14, range 3-48)...
December 6, 2017: Archives of Physical Medicine and Rehabilitation
https://www.readbyqxmd.com/read/29223456/simplex-optimization-of-the-variables-influencing-the-determination-of-pefloxacin-by-time-resolved-chemiluminescence
#15
José A Murillo Pulgarín, Aurelia Alañón Molina, Elisa Jiménez García
A new chemiluminescence (CL) detection system combined with flow injection analysis (FIA) for the determination of Pefloxacin is proposed. The determination is based on an energy transfer from Pefloxacin to terbium (III). The metal ion enhances the weak CL signal produced by the KMnO4/H2SO3/Pefloxacin system. A modified simplex method was used to optimize chemical and instrumental variables. The influence of the interaction of the permanganate, Tb (III), sodium sulphite and sulphuric acid concentrations, flow rate and injected sample volume was thoroughly investigated by using a modified simplex optimization procedure...
December 5, 2017: Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy
https://www.readbyqxmd.com/read/29222332/stabilization-of-the-gp120-v3-loop-through-hydrophobic-interactions-reduces-the-immunodominant-v3-directed-non-neutralizing-response-to-hiv-1-envelope-trimers
#16
Steven W de Taeye, Alba Torrents de la Peña, Andrea Vecchione, Enzo Scutigliani, Kwinten Sliepen, Judith A Burger, Patricia van der Woude, Anna Schorcht, Edith E Schermer, Marit J van Gils, Celia C LaBranche, David C Montefiori, Ian A Wilson, John P Moore, Andrew B Ward, Rogier W Sanders
To provide protective immunity against circulating primary HIV-1 strains, a vaccine most likely has to induce broadly neutralizing antibodies (bNAbs) to the HIV-1 envelope (Env) glycoprotein spike. Recombinant Env trimers such as the prototype BG505 SOSIP.664 that closely mimic the native Env spike can induce autologous neutralizing antibodies (NAbs) against relatively resistant (tier-2) primary viruses. Ideally, Env immunogens should present bNAb epitopes, but limit the presentation of immunodominant non-NAb epitopes that might induce off-target and potentially interfering responses...
December 8, 2017: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/29221146/swertiajaponin-inhibits-skin-pigmentation-by-dual-mechanisms-to-suppress-tyrosinase
#17
Bonggi Lee, Kyoung Mi Moon, Bong-Seon Lee, Ju-Hye Yang, Kwang Il Park, Won-Kyung Cho, Jin Yeul Ma
Many skin-whitening compounds target tyrosinase because it catalyzes two rate-limiting steps in melanin synthesis. Although many tyrosinase inhibitors are currently available for a skin-whitening purpose, undesirable adverse effects are also reported. Thus, numerous efforts have been made to develop safer tyrosinase inhibitors from natural products. In line with this, we tested fifty flavonoids, a group of naturally occurring antioxidants and metal chelators, and screened swertiajaponin as the strongest tyrosinase inhibitor in cell-free experiments...
November 10, 2017: Oncotarget
https://www.readbyqxmd.com/read/29219178/the-long-noncoding-rna-neat1-contributes-to-hepatocellular-carcinoma-development-by-sponging-mir-485-and-enhancing-the-expression-of-the-stat3
#18
Xu-Nan Zhang, Chang-Cheng Wang, Jun Zhou
Accumulating evidence has supported the significance of lncRNAs in tumorigenesis. Recently, some studies indicate the oncogenic role of lncRNA Nuclear Enriched Abundant Transcript 1 (NEAT1) in hepatocellular carcinoma (HCC). In our present study, we focused on the biological mechanisms through which NEAT1 can regulate HCC development. We found that NEAT1 was greatly upregulated in human HCC cell lines including Huh7, Hep3B, HepG2, Bel-7404 and SK-Hep1 cells compared to the normal human liver cell line LO2. In addition, we observed that miR-485 was significantly downregulated in HCC cells...
December 8, 2017: Journal of Cellular Physiology
https://www.readbyqxmd.com/read/29218557/what-can-we-learn-from-wide-angle-solution-scattering
#19
Yujing Wang, Hao Zhou, Emre Onuk, John Badger, Lee Makowski
Extending collection of x-ray solution scattering data into the wide-angle regime (WAXS) can provide information not readily extracted from small angle (SAXS) data. It is possible to accurately predict WAXS scattering on the basis of atomic coordinate sets and thus use it as a means of testing molecular models constructed on the basis of crystallography, molecular dynamics (MD), cryo-electron microscopy or ab initio modeling. WAXS data may provide insights into the secondary, tertiary and quaternary structural organization of macromolecules...
2017: Advances in Experimental Medicine and Biology
https://www.readbyqxmd.com/read/29214483/psychotherapyplus-augmentation-of-cognitive-behavioral-therapy-cbt-with-prefrontal-transcranial-direct-current-stimulation-tdcs-in-major-depressive-disorder-study-design-and-methodology-of-a-multicenter-double-blind-randomized-placebo-controlled-trial
#20
Malek Bajbouj, Sabine Aust, Jan Spies, Ana-Lucia Herrera-Melendez, Sarah V Mayer, Maike Peters, Christian Plewnia, Andreas J Fallgatter, Lukas Frase, Claus Normann, Nora Behler, Linda Wulf, Eva-Lotta Brakemeier, Frank Padberg
Major Depressive Disorder (MDD) is one of the most prevalent psychiatric disorders worldwide. About 20-30% of patients do not respond to the standard psychopharmacological and/or psychotherapeutic interventions. Mounting evidence from neuroimaging studies in MDD patients reveal altered activation patterns in lateral prefrontal brain areas. Successful cognitive behavioral therapy (CBT) is associated with a recovery of these neural alterations. Moreover, it has been demonstrated that transcranial direct current stimulation (tDCS) is capable of influencing prefrontal cortex activity and cognitive functions such as working memory and emotion regulation...
December 6, 2017: European Archives of Psychiatry and Clinical Neuroscience
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