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https://www.readbyqxmd.com/read/29456255/fuse-spectroscopy-of-the-accreting-hot-components-in-symbiotic-variables
#1
Edward M Sion, Patrick Godon, Joanna Mikolajewska, Bassem Sabra, Craig Kolobow
We have conducted a spectroscopic analysis of the far ultraviolet archival spectra of four symbiotic variables, EG And, AE Ara, CQ Dra and RW Hya. RW Hya and EG And have never had a recorded outburst while CQ Dra and AE Ara have outburst histories. We analyze these systems while they are in quiescence in order to help reveal the physical properties of their hot components via comparisons of the observations with optically thick accretion disk models and NLTE model white dwarf photospheres. We have extended the wavelength coverage down to the Lyman Limit with FUSE spectra...
April 2017: Astronomical Journal
https://www.readbyqxmd.com/read/29455518/surface-adatom-mediated-structural-transformation-in-bromoarene-monolayers-precursor-phases-in-surface-ullmann-reaction
#2
Qitang Fan, Liming Liu, Jingya Dai, Tao Wang, Huanxin Ju, Jin Zhao, Julian Kuttner, Gerhard Hilt, J Michael Gottfried, Junfa Zhu
Structural transformations of supramolecular systems triggered by external stimuli maintain great potential for application in the fabrication of molecular storage devices. Using combined ultrahigh vacuum scanning tunneling microscopy (UHV-STM), X-ray photoemission spectroscopy (XPS), and density functional theory (DFT) calculation, we unambiguously observed the surface adatom mediated structural transformation from 4,4''-dibromo-m-terphenyl (DMTP)-based halogen-bonded networks to DMTP-Cu(Ag) coordination networks on Cu(111) and Ag(111) at low temperatures...
February 19, 2018: ACS Nano
https://www.readbyqxmd.com/read/29449694/interaction-between-stat3-and-gli1-tgli1-oncogenic-transcription-factors-promotes-the-aggressiveness-of-triple-negative-breast-cancers-and-her2-enriched-breast-cancer
#3
Sherona R Sirkisoon, Richard L Carpenter, Tadas Rimkus, Ashley Anderson, Alexandria Harrison, Allison M Lange, Guangxu Jin, Kounosuke Watabe, Hui-Wen Lo
Signal transducer and activator of transcription 3 (STAT3), glioma oncogene homolog 1 (GLI1), and truncated GLI1 (tGLI1) are oncogenic transcription factors playing important roles in breast cancer. tGLI1 is a gain-of-function GLI1 isoform. Whether STAT3 physically and/or functionally interacts with GLI1/tGLI1 has not been explored. To address this knowledge gap, we analyzed 47 node-positive breast cancer specimens using immunohistochemical staining and found that phosphorylated-STAT3 (Y705), GLI1, and tGLI1 are co-overexpressed in the majority of triple-negative breast carcinomas (64%) and HER2-enriched (68%) breast carcinomas, and in lymph node metastases (65%)...
February 16, 2018: Oncogene
https://www.readbyqxmd.com/read/29448802/b97-3c-a-revised-low-cost-variant-of-the-b97-d-density-functional-method
#4
Jan Gerit Brandenburg, Christoph Bannwarth, Andreas Hansen, Stefan Grimme
A revised version of the well-established B97-D density functional approximation with general applicability for chemical properties of large systems is proposed. Like B97-D, it is based on Becke's power-series ansatz from 1997 and is explicitly parametrized by including the standard D3 semi-classical dispersion correction. The orbitals are expanded in a modified valence triple-zeta Gaussian basis set, which is available for all elements up to Rn. Remaining basis set errors are mostly absorbed in the modified B97 parametrization, while an established atom-pairwise short-range potential is applied to correct for the systematically too long bonds of main group elements which are typical for most semi-local density functionals...
February 14, 2018: Journal of Chemical Physics
https://www.readbyqxmd.com/read/29447973/extraction-purification-and-antioxidation-of-a-polysaccharide-from-fritillaria-unibracteata-var-wabuensis
#5
Feng Pan, Tian-Jiao Su, Yang Liu, Kai Hou, Chen Chen, Wei Wu
Rich polysaccharides were directly observed in the bulbs of Fritillaria unibracteata var. wabuensis (FUW) using the periodic acid-Schiff (PAS) method and microexamination. An acidic water-soluble heteropolysaccharide (FWPS1-1) was isolated from FUW through ethanol precipitation, decoloration, deproteinization, dialysis and separation using a DE-52 anion-exchange column and a Sepharose G-150 gel filtration column. FWPS1-1 (Mw: ~7.44 kDa) has many branches and long side chains; holds the triple-helix conformation; was composed of mannose (Man), galacturonic acid (GalA), galactose (Gal), xylose (Xyl) and arabinose (Ara) with a molar ratio of 2...
February 12, 2018: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/29444670/breast-cancer-in-ethiopia-evidence-for-geographic-difference-in-the-distribution-of-molecular-subtypes-in-africa
#6
Endale Hadgu, Daniel Seifu, Wondemagegnhu Tigneh, Yonas Bokretsion, Abebe Bekele, Markos Abebe, Thomas Sollie, Sofia D Merajver, Christina Karlsson, Mats G Karlsson
BACKGROUND: Breast cancer is a heterogeneous disease with several morphological and molecular subtypes. Widely accepted molecular classification system uses assessment of estrogen receptor (ER), progesterone receptor (PR), human epidermal growth factor receptor 2 (HER2) and proliferation marker Ki67. Few studies have been conducted on the incidence and molecular types of breast cancer in Sub-Saharan Africa. Previous studies mainly from Western and Central Africa, showed breast cancer to occur at younger ages and to present with aggressive features, such as high-grade, advanced stage and triple-negative phenotype (negative for ER, PR and HER2)...
February 14, 2018: BMC Women's Health
https://www.readbyqxmd.com/read/29441626/identification-of-metabolites-of-anticancer-candidate-salinomycin-using-liquid-chromatography-coupled-with-q-tof-and-hybrid-qqq-linear-ion-trap-mass-spectrometry
#7
Małgorzata Olejnik, Lidia Radko, Piotr Jedziniak
RATIONALE: Salinomycin is an ionophore antibiotic with potential anti-cancer activity. The history of its use in veterinary medicine show large differences in species susceptibility to its toxicity. At the same time, the results of so-far research suggest the correlation between the extent and pathways of ionophore biotransformation and its toxicity. The biotransformation pattern of salinomycin has not been studied so far. METHODS: The extracts from culture media of human hepatoma cells (HepG2) exposed to salinomycin were analysed with two mass spectrometry techniques...
February 14, 2018: Rapid Communications in Mass Spectrometry: RCM
https://www.readbyqxmd.com/read/29436217/a-stealth-and-fully-laden-drug-carrier-self-assembled-nanogel-encapsulated-with-epigallocatechin-gallate-and-sirna-for-drug-resistant-breast-cancer-therapy
#8
Jie Ding, Tingxizi Liang, Qianhao Min, Li-Ping Jiang, Jun-Jie Zhu
For co-delivery of therapeutic genes and chemical agents in combined therapy, the ideal drug delivery system (DDS) entails high-capacity and low-body toxicity carriers, allowing adequate drug dose for tumor region while yielding low residue in normal tissue. To augment the gene/drug load capacity and circumvent the potential toxicity brought by traditional inorganic and polymeric nanocarriers, a "stealth" carrier was herein designed in a simple self-assembly of (-)-epigallocatechin-3-O-gallate (EGCG) and small interfering RNA (siRNA) by recruiting protamine as biodegradable medium for the treatment of drug-resistant triple-negative breast cancer (TNBC)...
February 13, 2018: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/29435638/in-house-validation-of-a-high-resolution-mass-spectrometry-orbitrap-based-method-for-multiple-allergen-detection-in-a-processed-model-food
#9
Rosa Pilolli, Elisabetta De Angelis, Linda Monaci
In recent years, mass spectrometry (MS) has been establishing its role in the development of analytical methods for multiple allergen detection, but most analyses are being carried out on low-resolution mass spectrometers such as triple quadrupole or ion traps. In this investigation, performance provided by a high resolution (HR) hybrid quadrupole-Orbitrap™ MS platform for the multiple allergens detection in processed food matrix is presented. In particular, three different acquisition modes were compared: full-MS, targeted-selected ion monitoring with data-dependent fragmentation (t-SIM/dd2), and parallel reaction monitoring...
February 13, 2018: Analytical and Bioanalytical Chemistry
https://www.readbyqxmd.com/read/29434968/characterization-of-circulating-tumor-cells-in-newly-diagnosed-breast-cancer
#10
Lu Xu, Songlin Jia, Hengyu Li, Yue Yu, Guoping Liu, Yanmei Wu, Xishui Liu, Chaoqian Liu, Yue Zhou, Zhenzhen Zhang, Yuan Sheng
Identification of circulating tumor cells (CTCs) by surface marker expression and ploidy analysis [immunostaining-fluorescence in situ hybridization (iFISH)] has been shown to be a highly sensitive method in the identification of certain solid cancers. In the present study, iFISH analysis was performed to identify CTCs in 184 patients with newly diagnosed non-metastatic breast cancer, and the distribution of CTC subtypes was characterized based on cytokeratin (CK) expression and ploidy status. It was revealed that CTCs of non-metastatic, aneuploid breast cancers, independent of CK expression profile, can be detected with high sensitivity (90...
February 2018: Oncology Letters
https://www.readbyqxmd.com/read/29430877/detection-of-prohibited-substances-in-equine-hair-by-ultra-high-performance-liquid-chromatography-triple-quadrupole-mass-spectrometry-application-to-doping-control-samples
#11
B Gray, M Viljanto, E Menzies, L Vanhaecke
The detection of drugs in human hair samples has been performed by laboratories around the world for many years and the matrix is popular in disciplines such as workplace drug testing. To date, however, hair has not become a routinely utilised matrix in sports drug detection. The analysis of hair samples offers a number of potential advantages to doping control laboratories, not least of which are the greatly extended detection window and the ease of sample collection and storage. This paper describes the development, validation and utilisation of a sensitive ultra-high performance liquid chromatography-triple quadrupole mass spectrometry (UHPLC-MS/MS) method for the detection of 50 compounds...
February 12, 2018: Drug Testing and Analysis
https://www.readbyqxmd.com/read/29429638/association-between-intraoperative-hypotension-and-30-day-mortality-major-adverse-cardiac-events-and-acute-kidney-injury-after-non-cardiac-surgery-a-meta-analysis-of-cohort-studies
#12
Wan-Jie Gu, Bai-Ling Hou, Joey S W Kwong, Xin Tian, Yue Qian, Yin Cui, Jing Hao, Ju-Chen Li, Zheng-Liang Ma, Xiao-Ping Gu
BACKGROUND: The association between intraoperative hypotension (IOH) and postoperative outcomes is not fully understood. We performed a meta-analysis to determine whether IOH is associated with increased risk of 30-day mortality, major adverse cardiac events (MACEs) and acute kidney injury (AKI) after non-cardiac surgery. METHODS: We searched PubMed and Embase through May 2016 to identify cohort studies that investigated the association between IOH and risk of 30-day mortality, MACEs, or AKI in adult patients after non-cardiac surgery...
February 2, 2018: International Journal of Cardiology
https://www.readbyqxmd.com/read/29429155/continuous-use-of-thienopyridine-may-be-as-safe-as-low-dose-aspirin-in-endoscopic-resection-of-gastric-tumors
#13
Sooyeon Oh, Sang Gyun Kim, Jung Kim, Ji Min Choi, Joo Hyun Lim, Hyo-Joon Yang, Jae Yong Park, Seung Jun Han, Jue Lie Kim, Hyunsoo Chung, Hyun Chae Jung
Background/Aims: Current guidelines recommend withholding antiplatelets for 5-7 days before high-risk endoscopic procedures. We investigated whether this reduces post-endoscopic submucosal dissection (ESD) bleeding. Methods: Gastric ESD cases with antiplatelets were retorospectively reviewed. Withholding antiplatelets for 5-7 days before ESD was defined as cessation and 0-4 days as continuation. The rate and risk of post-ESD bleeding according to the types and cessation of antiplatelets were assessed...
February 13, 2018: Gut and Liver
https://www.readbyqxmd.com/read/29428459/next-generation-sequencing-of-hiv-1-protease-in-the-pivot-trial-of-protease-inhibitor-monotherapy
#14
David T Dunn, Wolfgang Stöhr, Alejandro Arenas-Pinto, Anna Tostevin, Jean L Mbisa, Nicholas I Paton
BACKGROUND: The PIVOT trial examined whether patients with suppressed viral load on combination antiretroviral therapy could be safely switched long-term to ritonavir-boosted protease inhibitor (PI) monotherapy. The main trial publication reported that only one of 296 patients allocated to PI monotherapy experienced a loss of drug options due to protease mutations (identified by local Sanger sequencing resistance tests) likely selected by study drug. OBJECTIVES: To assess if we had missed low frequency mutations, using a more sensitive methodology...
February 5, 2018: Journal of Clinical Virology: the Official Publication of the Pan American Society for Clinical Virology
https://www.readbyqxmd.com/read/29427213/treatment-strategies-in-octogenarians-with-early-stage-high-risk-breast-cancer
#15
Anita Mamtani, Julie J Gonzalez, Dayna T Neo, Robb S Friedman, Abram Recht, Michele R Hacker, Ranjna Sharma
BACKGROUND: Octogenarians with early-stage breast cancer often have low-risk tumor biology. However, optimal treatment strategies for those with high-risk biology remain unclear. METHODS: We reviewed the records of women ages 80-89 years with biopsy-proven, Stage I-II invasive breast cancer who were referred for surgical evaluation from January 2001 through December 2010. High-risk was defined as human epidermal growth factor receptor-positive (HER2+), triple-negative (TN), or histologic grade 3 disease...
February 9, 2018: Annals of Surgical Oncology
https://www.readbyqxmd.com/read/29426270/evening-primrose-oil-and-labour-is-it-effective-a-randomised-clinical-trial
#16
Mahnaz Kalati, Maryam Kashanian, Fereshteh Jahdi, Mohsen Naseri, Hamid Haghani, Narges Sheikhansari
The purpose of the present study was to evaluate the effects of evening primrose oil (EvPO) on the duration of pregnancy and labour. The study was performed as a triple blind placebo controlled randomised clinical trial on nulliparous low-risk women with a certain gestational age of 40 weeks of pregnancy and a Bishop score of less than 4. In the case group (EvPO group), EvPO capsules were administered, 1000 mg, twice daily, for 7 days, and in the control group, placebo was administered similarly. The women of the two groups were followed up to delivery...
February 9, 2018: Journal of Obstetrics and Gynaecology: the Journal of the Institute of Obstetrics and Gynaecology
https://www.readbyqxmd.com/read/29424731/efficacy-of-cardiac-shock-wave-therapy-in-patients-with-stable-angina-the-design-of-randomized-triple-blind-sham-procedure-controlled-study
#17
Evgeny Shkolnik, Greta Burneikaite, Jelena Celutkiene, Mikhail Scherbak, Gitana Zuoziene, Birute Petrauskiene, Ekaterina Trush, Aleksandras Laucevicius, Yury Vasyuk
OBJECTIVE: Despite revascularization and optimal medical treatment (OMT), patients with angina often have a reduced quality of life due to inadequate relief from symptoms. Recent studies have shown that the application of shock waves may reduce angina symptoms and improve quality of life, exercise capacity, and myocardial perfusion due to the stimulation of angiogenesis. However, there is limited evidence due to small, single-arm, single-center studies of low to moderate quality. The purpose of this study is to evaluate the impact of cardiac shock wave therapy (CSWT) on exercise tolerance and angina symptoms in patients with coronary artery disease and objective evidence of myocardial ischemia who cannot undergo traditional revascularization and experience angina despite OMT in comparison to sham procedure...
February 2018: Anatolian Journal of Cardiology
https://www.readbyqxmd.com/read/29421190/identification-of-a-high-affinity-binding-site-for-abscisic-acid-on-human-lanthionine-synthetase-component-c-like-protein-2
#18
Elena Cichero, Chiara Fresia, Lucrezia Guida, Valeria Booz, Enrico Millo, Claudia Scotti, Luisa Iamele, Hugo de Jonge, Denise Galante, Antonio De Flora, Laura Sturla, Tiziana Vigliarolo, Elena Zocchi, Paola Fossa
Lanthionine synthetase component C-like protein 2 (LANCL2) has been identified as the mammalian receptor mediating the functional effects of the universal stress hormone abscisic acid (ABA) in mammals. ABA stimulates insulin independent glucose uptake in myocytes and adipocytes via LANCL2 binding in vitro, improves glucose tolerance in vivo and induces brown fat activity in vitro and in vivo. The emerging role of the ABA/LANCL2 system in glucose and lipid metabolism makes it an attractive target for pharmacological interventions in diabetes mellitus and the metabolic syndrome...
February 5, 2018: International Journal of Biochemistry & Cell Biology
https://www.readbyqxmd.com/read/29420189/randomized-comparisons-of-double-dose-clopidogrel-or-adjunctive-cilostazol-versus-standard-dual-anti-platelet-in-patients-with-high-post-treatment-platelet-reactivity-results-of-the-creative-trial-clopidogrel-response-evaluation-and-anti-platelet-intervention
#19
Yi-Da Tang, Wenyao Wang, Min Yang, Kuo Zhang, Jing Chen, Shubin Qiao, Hongbing Yan, Yongjian Wu, Xiaohong Huang, Bo Xu, Runlin Gao, Yuejin Yang
Background -Patients undergoing percutaneous coronary intervention (PCI) react differently to antiplatelet drugs. Those with low responsiveness to clopidogrel have a higher risk of cardiac ischemic events. The goal of this study is to conduct a head-to-head comparison of the safety and effectiveness of intensified antiplatelet therapies (either double-dose clopidogrel [DOUBLE] or adjunctive cilostazol [TRIPLE]) and conventional strategy (STANDARD) in post-PCI patients. Methods -In this single-center, randomized, controlled trial, we used thromboelastography (TEG), a platelet function test, to select 1078 PCI patients at high thrombotic risk and compared the intensified antiplatelet therapies with standard antiplatelet therapy...
February 2, 2018: Circulation
https://www.readbyqxmd.com/read/29416876/histological-scoring-of-immune-and-stromal-features-in-breast-and-axillary-lymph-nodes-is-prognostic-for-distant-metastasis-in-lymph-node-positive-breast-cancers
#20
Anita Grigoriadis, Patrycja Gazinska, Trupti Pai, Sheeba Irhsad, Yin Wu, Rosemary Millis, Kalnisha Naidoo, Julie Owen, Cheryl E Gillett, Andrew Tutt, Anthonius Cc Coolen, Sarah E Pinder
The prognostic importance of lymph node (LN) status and tumour-infiltrating lymphocytes (TILs), is well established, particularly TILs in triple negative breast cancers (TNBCs). So far, few studies have interrogated changes in involved and uninvolved LNs and evaluated if their morphological patterns add valuable information for the prediction of disease progression in breast cancer. In a cohort of 309 patients enriched for TNBCs (170/309), we histologically characterised immune and stromal features in primary tumours and associated involved and uninvolved axillary LNs on routine haematoxylin and eosin stained sections...
January 2018: Journal of Pathology. Clinical Research
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