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https://www.readbyqxmd.com/read/28651379/klf4-is-a-tumor-suppressor-in-anaplastic-meningioma-stem-like-cells-and-human-meningiomas
#1
Hailiang Tang, Xuanchun Wang, Hongda Zhu, Lingyang Hua, Jingrun Li, Qing Xie, Xiancheng Chen, Tao Zhang, Ye Gong
Meningiomas are the most common primary tumors in central nervous system. While recent studies have revealed genetic clues to lower grade human meningiomas, the molecular determinants driving the progression and recurrence of anaplastic meningioma, the most malignant subtype with a low prevalence but high morbidity, are still poorly understood. It has been proposed that high recurrence rates of malignant meningiomas are linked to cancer stem cells. Indeed, tumor stem-like cells have been isolated from various meningioma subtypes, but never been obtained from anaplastic meningioma...
June 26, 2017: Journal of Molecular Cell Biology
https://www.readbyqxmd.com/read/28651156/alterations-in-aspergillus-brasiliensis-niger-atcc-9642-membranes-associated-to-metabolism-modifications-during-application-of-low-intensity-electric-current
#2
Nancy Velasco-Alvarez, Mariano Gutiérrez-Rojas, Ignacio González
The effects of electric current on membranes associated with metabolism modifications in Aspergillus brasiliensis (niger) ATCC 9642 were studied. A 450-mL electrochemical cell with titanium ruthenium-oxide coated electrodes and packed with 15g of perlite, as inert support, was inoculated with A. brasiliensis spores and incubated in a solid inert-substrate culture (12 d; 30°C). Then, 4.5days after starting the culture, a current of 0.42mAcm(-2) was applied for 24h. The application of low-intensity electric current increased the molecular oxygen consumption rate in the mitochondrial respiratory chain, resulting in high concentrations of reactive oxygen species, promoting high lipoperoxidation levels, according to measured malondialdehyde, and consequent alterations in membrane permeability explained the high n-hexadecane (HXD) degradation rates observed here (4...
June 19, 2017: Bioelectrochemistry
https://www.readbyqxmd.com/read/28651075/modulation-of-natriuretic-peptide-receptors-in-human-adipose-tissue-molecular-mechanisms-behind-the-natriuretic-handicap-in-morbidly-obese-patients
#3
A Gentili, M R Frangione, E Albini, C Vacca, M A Ricci, S De Vuono, M Boni, F Rondelli, L Rotelli, G Lupattelli, C Orabona
The B-type natriuretic peptide (BNP) hormone plays a crucial role in the regulation of cardiovascular and energy homeostasis. Obesity is associated with low circulating levels of BNP, a condition known as "natriuretic handicap." Recent evidences suggest an altered expression of BNP receptors-both the signaling natriuretic peptide receptors (NPR)-A and the clearance NPR-C receptor-in adipose tissue (AT) as one of the putative causes of natriuretic handicap. The current study aims at clarifying the molecular mechanisms behind the natriuretic handicap, focusing on NPR modulation in the AT of obese and control subjects...
June 10, 2017: Translational Research: the Journal of Laboratory and Clinical Medicine
https://www.readbyqxmd.com/read/28651052/inhomogeneity-in-ethylammonium-nitrate-acetonitrile-binary-mixtures-part-i-the-highest-low-q-excess-so-far-reported
#4
Alessandro Mariani, Ruggero Caminiti, Fabio Ramondo, Giovanna Salvitti, Francesca Mocci, Lorenzo Gontrani
The binary mixtures of the ionic liquid ethylammonium nitrate with acetonitrile have been studied by means of Wide and Small Angle X-ray Scattering and via two different computational methods, namely classical molecular dynamics and DFT. Our results show how the local arrangement is directly linked to the long-range structure. Moreover, we found once again a similarity in the physicochemical behaviour of ethylammonium nitrate and water.
June 26, 2017: Journal of Physical Chemistry Letters
https://www.readbyqxmd.com/read/28650987/accuracy-of-zika-virus-disease-case-definition-during-simultaneous-dengue-and-chikungunya-epidemics
#5
José Ueleres Braga, Clarisse Bressan, Ana Paula Razal Dalvi, Guilherme Amaral Calvet, Regina Paiva Daumas, Nadia Rodrigues, Mayumi Wakimoto, Rita Maria Ribeiro Nogueira, Karin Nielsen-Saines, Carlos Brito, Ana Maria Bispo de Filippis, Patrícia Brasil
BACKGROUND: Zika is a new disease in the American continent and its surveillance is of utmost importance, especially because of its ability to cause neurological manifestations as Guillain-Barré syndrome and serious congenital malformations through vertical transmission. The detection of suspected cases by the surveillance system depends on the case definition adopted. As the laboratory diagnosis of Zika infection still relies on the use of expensive and complex molecular techniques with low sensitivity due to a narrow window of detection, most suspected cases are not confirmed by laboratory tests, mainly reserved for pregnant women and newborns...
2017: PloS One
https://www.readbyqxmd.com/read/28650979/expression-of-cerebral-serotonin-related-to-anxiety-like-behaviors-in-c57bl-6-offspring-induced-by-repeated-subcutaneous-prenatal-exposure-to-low-dose-lipopolysaccharide
#6
Pei-Tan Hsueh, Hsuan-Han Wang, Chiu-Lin Liu, Wei-Fen Ni, Ya-Lei Chen, Jong-Kang Liu
Prenatal exposure to lipopolysaccharide (LPS), which likely occurs due to infection or contact with environmental allergens during pregnancy, is a proposed risk factor that induces anxiety- and autism spectrum disorder-like behaviors in offspring. However, the molecular and behavioral changes in offspring after maternal immune activation have not been completely identified. We hypothesized that a subcutaneous injection of LPS in a pregnant mouse would induce changes in cerebral serotonin (5-HT) in parallel to the appearance of anxiety-like behaviors in the dam's offspring...
2017: PloS One
https://www.readbyqxmd.com/read/28650525/thermal-synthesis-of-perchlorinated-oligosilanes-a-fresh-look-at-an-old-reaction
#7
Max C Holthausen, Felix Neumeyer, Julia I Schweizer, Lioba Meyer, Alexander G Sturm, Andor Nadj, Norbert Auner
A combined experimental and theoretical study of the high-temperature reaction of SiCl4 and elemental silicon is presented. The nature and reactivity of the product formed upon rapid cooling of the gaseous reaction mixture is investigated by comparison with defined model compounds, i.e. cyclo-Si5Cl10, n-Si5Cl12 and n-Si4Cl10. A DFT assessment provides mechanistic insight into the oligosilane formation. Experimental 29Si NMR investigations, supported by quantum-chemical 29Si NMR calculations, consistently show that the reaction product is composed of discrete molecular perchlorinated oligosilanes...
June 26, 2017: Chemistry: a European Journal
https://www.readbyqxmd.com/read/28650501/ph-responsive-near-infrared-fluorescent-cyanine-dyes-for-molecular-imaging-based-on-ph-sensing
#8
Koji Miki, Kentaro Kojima, Kazuaki Oride, Hiroshi Harada, Akiyo Morinibu, Kouichi Ohe
Indocyanine green (ICG) derivatives having nucleophilic substituents were synthesized as pH-responsive near-infrared dyes. pH-responsive dyes 1-C with closed-ring structures smoothly internalized and converted to emissive open-ring structures 1-O in response to relatively low pHs in acidic intracellular compartments of HeLa cells.
June 26, 2017: Chemical Communications: Chem Comm
https://www.readbyqxmd.com/read/28650500/insight-into-thiophene-hydrodesulfurization-on-clean-and-s-modified-mop-010-a-periodic-density-functional-theory-study
#9
Guixia Li, Lianming Zhao, Houyu Zhu, Xiuping Liu, Huifang Ma, Yanchen Yu, Wenyue Guo
The hydrodesulfurization (HDS) of thiophene on clean and S-modified MoP(010) is investigated to understand the HDS mechanism as well as the surface sulfur (S) atom effect using periodic density functional theory (DFT). The results show that thiophene prefers strongly flat adsorption on both the clean and S-modified surfaces, in either the molecular state or the dissociative state breaking simultaneously one C-S bond, and the adsorption of thiophene can be slightly weakened by the surface S atom. Thermodynamic and kinetic analysis indicates that the HDS of thiophene in both the molecular and dissociative adsorption states prefers to take place along the direct desulfurization (DDS) pathway rather than hydrogenation on both the clean and S-modified MoP(010) surfaces...
June 26, 2017: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/28650461/a-light-and-calcium-gated-transcription-factor-for-imaging-and-manipulating-activated-neurons
#10
Wenjing Wang, Craig P Wildes, Tanyaporn Pattarabanjird, Mateo I Sanchez, Gordon F Glober, Gillian A Matthews, Kay M Tye, Alice Y Ting
Activity remodels neurons, altering their molecular, structural, and electrical characteristics. To enable the selective characterization and manipulation of these neurons, we present FLARE, an engineered transcription factor that drives expression of fluorescent proteins, opsins, and other genetically encoded tools only in the subset of neurons that experienced activity during a user-defined time window. FLARE senses the coincidence of elevated cytosolic calcium and externally applied blue light, which together produce translocation of a membrane-anchored transcription factor to the nucleus to drive expression of any transgene...
June 26, 2017: Nature Biotechnology
https://www.readbyqxmd.com/read/28650361/pharmacological-thromboembolic-prophylaxis-in-traumatic-brain-injuries-low-molecular-weight-heparin-is-superior-to-unfractionated-heparin
#11
Elizabeth Benjamin, Gustavo Recinos, Alberto Aiolfi, Kenji Inaba, Demetrios Demetriades
OBJECTIVE: We hypothesized that low molecular weight heparin (LMWH) is superior to unfractionated heparin (UH) for venous thromboembolism (VTE) prophylaxis in patients with severe traumatic brain injuries (TBI). SUMMARY BACKGROUND DATA: Pharmacological VTE prophylaxis with LMWH or UH is the current standard of care in TBI. Clinical work suggests that LMWH may be more effective than UH for VTE prophylaxis in trauma patients. Experimental work shows that heparinoids may have neuroprotective properties...
June 22, 2017: Annals of Surgery
https://www.readbyqxmd.com/read/28650097/low-cost-perovskite-solar-cells-employing-dimethoxydiphenylamine-substituted-bistricyclic-aromatic-enes-as-hole-transporting-materials
#12
Mohammad Khaja Nazeeruddin, Kasparas Rakstys, Sanghyun Paek, Giulia Grancini, Peng Gao, Vygintas Jankauskas, Abdullah M Asiri
The synthesis, characterization and photovoltaic performance of series of novel molecular hole transporting materials (HTMs) based on bistricyclic aromatic enes (BAEs) are presented. The new derivatives have been obtained following the simple and straightforward two-step procedure from inexpensive starting reagents mimicking the synthetically challenging 9,9'-spirobifluorene moiety of the well-studied spiro-OMeTAD. The novel HTMs are tested in mixed caions and anions perovskite solar cells (PSCs) yielding power conversion efficiency (PCE) of 19...
June 26, 2017: ChemSusChem
https://www.readbyqxmd.com/read/28650060/an-adaptive-bias-hybrid-md-kmc-algorithm-for-protein-folding-and-aggregation
#13
Emanuel K Peter, Joan-Emma Shea
In this paper, we present a novel hybrid Molecular Dynamics/kinetic Monte Carlo (MD/kMC) algorithm and apply it to protein folding and aggregation in explicit solvent. The new algorithm uses a dynamical definition of biases throughout the MD component of the simulation, normalized in relation to the unbiased forces. The algorithm guarantees sampling of the underlying ensemble in dependency of one average linear coupling factor 〈α〉τ. We test the validity of the kinetics in simulations of dialanine and compare dihedral transition kinetics with long-time MD-simulations...
June 26, 2017: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/28650046/chiroptical-inversion-for-isolated-vibronic-transitions-of-supersonic-beam-cooled-molecules
#14
Jörn Lepelmeier, José Lorenzo Alonso-Gómez, Farinaz Mortaheb, Ulrich Boesl, Ulrich Heiz, Aras Kartouzian
Circular dichroism-resonance-enhanced multiphoton ionization (CD-REMPI) was used for CD measurements on several single vibronic transitions of supersonic beam-cooled (R)-(+)-1-phenylethanol. Due to the low molecular densities within a supersonic beam and the expected small anisotropy factor of 1-phenylethanol in the permille region, the precision of the experimental method had to be significantly improved. Therefore, a single laser pulse evaluation combined with a twin-peak technique enabled within the used supersonic beam setup is presented...
June 26, 2017: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/28650000/andexanet-alfa-a-recombinant-mimetic-of-human-factor-xa-for-the-reversal-of-anticoagulant-therapies
#15
G Escolar, M Diaz-Ricart, E Arellano-Rodrigo
Activated coagulation factor X (FXa) is a common target for classic and newer anticoagulants. Parenteral anticoagulants with an indirect inhibitory action on FXa (low-molecular-weight heparins) have a well-established clinical efficacy in the prophylaxis and therapy of thromboembolic conditions. More recently developed direct oral anticoagulants (DOACs) have emerged as a new class of antithrombotic drugs. Rivaroxaban, apixaban and edoxaban are direct inhibitors of FXa approved for the management of venous thromboembolism and stroke prevention in atrial fibrillation...
May 2017: Drugs of Today
https://www.readbyqxmd.com/read/28649993/kappa-opioid-receptor-activation-in-dopamine-neurons-disrupts-behavioral-inhibition
#16
Antony D Abraham, Harrison M Fontaine, Allisa J Song, Mackenzie M Andrews, Madison A Baird, Brigitte L Kieffer, Benjamin B Land, Charles Chavkin
The dynorphin/kappa opioid receptor (KOR) system has been previously implicated in the regulation of cognition, but the neural circuitry and molecular mechanisms underlying KOR-mediated cognitive disruption are unknown. Here, we used an operational test of cognition involving timing and behavioral inhibition and found that systemic KOR activation impairs performance of male and female C57BL/6 mice in the differential reinforcement of low response rates (DRL) task. Systemic KOR antagonism also blocked stress-induced disruptions of DRL performance...
June 26, 2017: Neuropsychopharmacology: Official Publication of the American College of Neuropsychopharmacology
https://www.readbyqxmd.com/read/28649808/development-of-a-real-time-loop-mediated-isothermal-amplification-assay-for-detection-of-burkholderia-mallei
#17
V Pal, A Saxena, S Singh, A K Goel, J S Kumar, M M Parida, G P Rai
Burkholderia mallei is the aetiological agent of glanders, a highly contagious and re-emerging zoonotic disease. Early diagnosis of glanders is critically important to ensure timely treatment with appropriate antibiotics in humans, and to prevent spread of infection in animals. Molecular detection of B. mallei has always been troublesome because of its genetic similarity with Burkholderia pseudomallei, the causative agent of melioidosis. In present investigation, a set of six B. mallei-specific primers were designed and a simple, rapid, specific and sensitive real-time loop-mediated isothermal amplification (LAMP) assay was developed for detection of B...
June 25, 2017: Transboundary and Emerging Diseases
https://www.readbyqxmd.com/read/28649673/rapid-acting-antidepressants-in-chronic-stress-models-molecular-and-cellular-mechanisms
#18
Brendan D Hare, Sriparna Ghosal, Ronald S Duman
Stress-associated disorders, including depression and anxiety, impact nearly 20% of individuals in the United States. The social, health, and economic burden imposed by stress-associated disorders requires in depth research efforts to identify suitable treatment strategies. Traditional medications (e.g., selective serotonin reuptake inhibitors, monoamine oxidase inhibitors) have significant limitations, notably a time lag for therapeutic response that is compounded by low rates of efficacy. Excitement over ketamine, a rapid acting antidepressant effective in treatment resistant patients, is tempered by transient dissociative and psychotomimetic effects, as well as abuse potential...
February 2017: Chronic stress
https://www.readbyqxmd.com/read/28649649/patterns-of-cell-cycle-checkpoint-deregulation-associated-with-intrinsic-molecular-subtypes-of-human-breast-cancer-cells
#19
Jacquelyn J Bower, Leah D Vance, Matthew Psioda, Stephanie L Smith-Roe, Dennis A Simpson, Joseph G Ibrahim, Katherine A Hoadley, Charles M Perou, William K Kaufmann
Genomic instability is a hallmark of breast cancer, contributes to tumor heterogeneity, and influences chemotherapy resistance. Although Gap 2 and mitotic checkpoints are thought to prevent genomic instability, the role of these checkpoints in breast cancer is poorly understood. Here, we assess the Gap 2 and mitotic checkpoint functions of 24 breast cancer and immortalized mammary epithelial cell lines representing four of the six intrinsic molecular subtypes of breast cancer. We found that patterns of cell cycle checkpoint deregulation were associated with the intrinsic molecular subtype of breast cancer cell lines...
2017: NPJ Breast Cancer
https://www.readbyqxmd.com/read/28649643/molecular-stratification-of-early-breast-cancer-identifies-drug-targets-to-drive-stratified-medicine
#20
Jane Bayani, Cindy Q Yao, Mary Anne Quintayo, Fu Yan, Syed Haider, Alister D'Costa, Cassandra L Brookes, Cornelis J H van de Velde, Annette Hasenburg, Dirk G Kieback, Christos Markopoulos, Luc Dirix, Caroline Seynaeve, Daniel Rea, Paul C Boutros, John M S Bartlett
Many women with hormone receptor-positive early breast cancer can be managed effectively with endocrine therapies alone. However, additional systemic chemotherapy treatment is necessary for others. The clinical challenges in managing high-risk women are to identify existing and novel druggable targets, and to identify those who would benefit from these therapies. Therefore, we performed mRNA abundance analysis using the Tamoxifen and Exemestane Adjuvant Multinational (TEAM) trial pathology cohort to identify a signature of residual risk following endocrine therapy and pathways that are potentially druggable...
2017: NPJ Breast Cancer
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