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https://www.readbyqxmd.com/read/27933754/tandem-thorpe-reaction-palladium-catalyzed-asymmetric-allylic-alkylation-access-to-chiral-%C3%AE-enaminonitriles-with-excellent-enantioselectivity
#1
Xue Long Hou, Da-Chang Bai, Xiu-Yan Liu, Hao Li, Chang-Hua Ding
A new type of nucleophile, 3-imino nitrile carbanion generated in-situ by Thorpe reaction of acetonitrile with base, was developed successfully and applied in Pd-catalyzed asymmetric allylic alkylation with mono substituted allyl reagents under Pd/SIOCPhox catalysis, affording β-enaminonitrile products in high yields with excellent regio- and enantioselectivities.
December 8, 2016: Chemistry, An Asian Journal
https://www.readbyqxmd.com/read/27933750/comparing-glucose-and-hemoglobin-a1c-diagnostic-tests-among-a-high-metabolic-risk-hispanic-population
#2
Mónica A Vega-Vázquez, Margarita Ramirez-Vick, Francisco J Muñoz-Torres, Loida A González-Rodríguez, Kaumudi Joshipura
AIMS: Compare HbA1c diagnostic tests for pre-diabetes and diabetes with plasma glucose criteria (PGC), and compare the metabolic profiles of people classified by HbA1c versus by glucose levels. METHODS: Participants were recruited for the San Juan Overweight Adults Longitudinal Study (SOALS). Were primarily Hispanic (98%), without previously diagnosed diabetes, and aged 40-65 years. Participants classified as normal glycemic, pre-diabetes or diabetes based on baseline HbA1c and PGC, were compared with respect to baseline cardiometabolic factors...
December 9, 2016: Diabetes/metabolism Research and Reviews
https://www.readbyqxmd.com/read/27933740/fine-needle-aspiration-in-the-diagnosis-and-classification-of-hepatoblastoma-analysis-of-21-new-cases
#3
Tatjana Vlajnic, Hervé J Brisse, Isabelle Aerts, Paul Fréneaux, Cécile Cellier, Monique Fabre, Jerzy Klijanienko
BACKGROUND: Diagnosis of hepatoblastoma (HBL) is based on characteristic clinical and radiological presentation, young age and marked elevation of serum α-fetoprotein (aFP). Fine needle aspiration (FNA) technique is successfully used in the diagnosis of hepatoblastoma. To evaluate the value of FNA in the diagnosis and subtyping of HBL, we report our experience correlated to histological sections (core needle biopsy, CNB). METHODS: From 1991 to 2015, 21 cases from 20 patients were cytologically diagnosed as HBL...
December 9, 2016: Diagnostic Cytopathology
https://www.readbyqxmd.com/read/27933737/testing-the-influence-of-surfactant-based-wound-dressings-on-proteinase-activity
#4
Sunyoung Jeong, Gregory S Schultz, Daniel J Gibson
Proteinases are enzymes that can digest other proteins. In chronic wounds, a sub-class of these enzymes with the ability to degrade the extracellular matrix (matrix metalloproteinases, MMPs) have been found to both inhibit healing and to be able to aid in enzymatically debriding a wound. Enzymatic debridement using the enzymes present in a wound is generally called autolytic debridement. Clinicians seeking to employ autolytic debridement typically use occlusive materials such as medical honey, alginate dressings and other occlusive dressings...
December 8, 2016: International Wound Journal
https://www.readbyqxmd.com/read/27933733/mannich-bases-of-1-2-4-triazole-3-thione-containing-adamantane-moiety-synthesis-preliminary-anticancer-evaluation-and-molecular-modeling-studies
#5
Milorad Z Milošev, Katarina Jakovljević, Milan D Joksović, Tatjana Stanojković, Ivana Z Matić, Milka Perović, Vesna Tešić, Selma Kanazir, Milan Mladenović, Marko V Rodić, Vukadin M Leovac, Snežana Trifunović, Violeta Marković
A series of 18 novel N-Mannich bases derived from 5-adamantyl-1,2,4-triazole-3-thione was synthesized and characterized using NMR spectroscopy and X-ray diffraction technique. All derivatives were evaluated for their anticancer potential against four human cancer cell lines. Several tested compounds exerted good cytotoxic activities on K562 and HL-60 cell lines, along with pronounced selectivity, showing lower cytotoxicity against normal fibroblasts MRC-5 compared to cancer cells. The effects of compounds 5b, 5e and 5j on the cell cycle were investigated by flow cytometric analysis...
December 9, 2016: Chemical Biology & Drug Design
https://www.readbyqxmd.com/read/27933730/reactivity-of-9-aminoacridine-drug-quinacrine-with-glutathione-limits-its-anti-prion-activity
#6
Martin Šafařík, Tibor Moško, Zbigniew Zawada, Eva Šafaříková, Martin Dračínský, Karel Holada, Jaroslav Šebestík
Quinacrine - the drug based on 9-aminoacridine - failed in clinical trials for prion diseases, whereas it was active in in-vitro studies. We hypothesize that aromatic nucleophilic substitution at C9 could be contributing factor responsible for this failure because of the transfer of acridine moiety from quinacrine to abundant glutathione. Here, we described the semi-large-scale synthesis of the acridinylated glutathione and the consequences of its formation on biological and biophysical activities. The acridinylated glutathione is one order of magnitude weaker prion protein binder than the parent quinacrine...
December 9, 2016: Chemical Biology & Drug Design
https://www.readbyqxmd.com/read/27933728/sequential-change-detection-and-monitoring-of-temporal-trends-in-random-effects-meta-analysis
#7
Samson Henry Dogo, Allan Clark, Elena Kulinskaya
Temporal changes in magnitude of effect sizes reported in many areas of research are a threat to the credibility of the results and conclusions of meta-analysis. Numerous sequential methods for meta-analysis have been proposed to detect changes and monitor trends in effect sizes so that meta-analysis can be updated when necessary and interpreted based on the time it was conducted. The difficulties of sequential meta-analysis under the random-effects model are caused by dependencies in increments introduced by the estimation of the heterogeneity parameter τ(2) ...
December 8, 2016: Research Synthesis Methods
https://www.readbyqxmd.com/read/27933723/comfa-topomer-comfa-and-hqsar-studies-on-a-series-of-novel-hiv-1-protease-inhibitors
#8
Afsane Heidari, Mohammad H Fatemi
Comparative molecular field analysis (CoMFA), topomer CoMFA and hologram QSAR (HQSAR) as three efficient methods of QSAR have been performed on 40 newly synthesized inhibitors against HIV-1 protease. Molecular alignment was done by aid of crystallographic structure of template inhibitor (indirectly alignment) and also by the molecular mechanic (MM) minimized structure. Both alignment methods produced satisfactory statistics for training set, but indirectly alignment had more predictive power. Generated counter maps, especially by topomer CoMFA, give comprehensive information about structural features affecting the inhibitory activities of studied chemicals...
December 9, 2016: Chemical Biology & Drug Design
https://www.readbyqxmd.com/read/27933719/depth-profiling-cross-linked-poly-methyl-methacrylate-films-a-tof-sims-approach
#9
Soheila Naderi-Gohar, Kevin M H Huang, Yiliang Wu, Woon Ming Lau, Heng-Yong Nie
RATIONALE: In order to determine the degree of cross-linking on the surface and its variations in a nanometer-scale depth of organic materials, we developed an approach based on time-of-flight secondary ion mass spectrometry (TOF-SIMS), which provides rich chemical information in the form of fragment ions. TOF-SIMS is extremely surface sensitive and capable of depth profiling with the use of a sputter ion beam to remove controllable amounts of substance. METHODS: Poly(methyl methacrylate) (PMMA) films spin-coated on a Si substrate were cross-linked using a recently developed, surface sensitive, hyperthermal hydrogen projectile bombardment technique...
December 9, 2016: Rapid Communications in Mass Spectrometry: RCM
https://www.readbyqxmd.com/read/27933717/mass-cytometry-analytical-approaches-reveal-cytokine-induced-changes-in-natural-killer-cells
#10
Elena Vendrame, Julia Fukuyama, Dara M Strauss-Albee, Susan Holmes, Catherine A Blish
BACKGROUND: Natural killer (NK) cells have antiviral and antitumor activity that could be harnessed for the treatment of infections and malignancies. To maintain cell viability and enhance antiviral and antitumor effects, NK cells are frequently treated with cytokines. Here we performed an extensive assessment of the effects of cytokines on the phenotype and function of human NK cells. METHODS: We used cytometry by time-of-flight (CyTOF) to evaluate NK cell repertoire changes after stimulation with interleukin (IL)-2, IL-15 or a combination of IL- 12/IL-15/IL-18...
December 9, 2016: Cytometry. Part B, Clinical Cytometry
https://www.readbyqxmd.com/read/27933712/the-importance-of-mrna-structure-in-determining-the-pathogenicity-of-synonymous-and-non-synonymous-mutations-in-haemophilia
#11
N Hamasaki-Katagiri, B C Lin, J Simon, R C Hunt, T Schiller, E Russek-Cohen, A A Komar, H Bar, C Kimchi-Sarfaty
INTRODUCTION: Mutational analysis is commonly used to support the diagnosis and management of haemophilia. This has allowed for the generation of large mutation databases which provide unparalleled insight into genotype-phenotype relationships. Haemophilia is associated with inversions, deletions, insertions, nonsense and missense mutations. Both synonymous and non-synonymous mutations influence the base pairing of messenger RNA (mRNA), which can alter mRNA structure, cellular half-life and ribosome processivity/elongation...
December 9, 2016: Haemophilia: the Official Journal of the World Federation of Hemophilia
https://www.readbyqxmd.com/read/27933707/re-ultrasound-based-gestational-age-estimation-in-late-pregnancy-a-t-papageorghiou-b-kemp-w-stones-e-o-ohuma-s-h-kennedy-m-purwar-l-j-salomon-d-g-altman-j-a-noble-e-bertino-m-g-gravett-r-pang-l-cheikh-ismail-f-c-barros-a-lambert-y-a-jaffer-c-g-victora-z-a-bhutta
#12
https://www.readbyqxmd.com/read/27933699/room-temperature-arylation-of-thiols-breakthrough-with-aryl-chlorides
#13
Min Jiang, Haifang Li, Haijun Yang, Hua Fu
The formation of aryl C-S bonds is an important chemical transformation because aryl sulfides are valuable building blocks for the synthesis of biologically and pharmaceutically active molecules and organic materials. Aryl sulfides have traditionally been synthesized through the transition-metal-catalyzed cross-coupling of aryl halides with thiols. However, the aryl halides used are usually bromides and iodides; readily available, low-cost aryl chlorides often not reactive enough. Furthermore, the deactivation of transition-metal catalysts by thiols has forced chemists to use high catalyst loadings, specially designed ligands, high temperatures, and/or strong bases, thus leading to high costs and the incompatibility of some functional groups...
December 9, 2016: Angewandte Chemie
https://www.readbyqxmd.com/read/27933698/sofosbuvir-plus-ribavirin-in-treatment-na%C3%A3-ve-patients-with-chronic-hepatitis-c-virus-genotype-1-or-3-infection-in-india
#14
S R Shah, A Chowdhury, R Mehta, D Kapoor, A Duseja, A Koshy, A Shukla, A Sood, K Madan, R Sud, S Nijhawan, R Pawan, M Prasad, K Kersey, D Jiang, E Svarovskaia, B Doehle, B Kanwar, M Subramanian, S K Acharya, S Sarin
Until 2014, pegylated interferon plus ribavirin was the recommended standard of care for the treatment of chronic hepatitis C virus (HCV) infection in India. This open-label phase 3b study, conducted across 14 sites in India between 31 March 2014 and 30 November 2015, evaluated the efficacy and safety of sofosbuvir plus ribavirin therapy among treatment-naïve patients with chronic genotype 1 or 3 HCV infection. A total of 117 patients with genotype 1 or 3 HCV infection were randomized 1:1 to receive sofosbuvir 400 mg and weight-based ribavirin (1000 or 1200 mg) daily for 16 or 24 weeks...
December 9, 2016: Journal of Viral Hepatitis
https://www.readbyqxmd.com/read/27933697/total-magnetic-resonance-imaging-burden-of-cerebral-small-vessel-disease-is-associated-with-post-stroke-depression-in-patients-with-acute-lacunar-stroke
#15
X Zhang, Y Tang, Y Xie, C Ding, J Xiao, X Jiang, H Shan, Y Lin, C Li, D Hu, T Li, L Sheng
BACKGROUND AND PURPOSE: Despite extensive studies on post-stroke depression (PSD), the role of the total burden of cerebral small-vessel disease (cSVD) in its pathogenesis remains unclear. METHODS: We conducted a magnetic resonance imaging (MRI)-based cohort study to investigate the relationship between total MRI burden of cSVD and PSD among patients with first-ever lacunar stroke. From June 2013 to January 2016, 374 patients were consecutively recruited. PSD was identified using the Chinese version of the Structured Clinical Interview for DSM-IV...
December 9, 2016: European Journal of Neurology: the Official Journal of the European Federation of Neurological Societies
https://www.readbyqxmd.com/read/27933690/on-the-reactions-of-thiols-sulfenic-acids-and-sulfinic-acids-with-hydrogen-peroxide
#16
Jean-Philippe R Chauvin, Derek A Pratt
The reaction of thiols with H2 O2 is central to many processes essential to life, from protein folding to redox signaling. The initial products are assumed to be sulfenic acids, but their observation, and the kinetic and mechanistic characterization of their subsequent reactions, has proven challenging. The introduction of a 9-fluorotriptycene substituent enabled the use of (19) F NMR to directly monitor the reaction of a thiol with H2 O2 to yield a sulfenic acid, and its subsequent oxidation to sulfinic and sulfonic acids...
December 9, 2016: Angewandte Chemie
https://www.readbyqxmd.com/read/27933686/risk-of-incident-mycobacterium-tuberculosis-infection-in-patients-with-inflammatory-bowel-disease-a-nationwide-population-based-study-in-south-korea
#17
S N Hong, H J Kim, K H Kim, S-J Han, I M Ahn, H S Ahn
BACKGROUND: The low incidence of Mycobacterium tuberculosis infection and lack of adequate controls have prevented researchers from estimating tuberculosis (TB) risk in inflammatory bowel disease (IBD) patients. AIM: To evaluate the risk of incident TB among IBD patients. METHODS: Using the 2011-2013 data of the South Korean National Health Insurance (NHI) system, we calculated the incidence rates (IRs), standardised incidence ratio (SIR) and number needed to screen (NNS) for incident TB in IBD patients compared to the general population in terms of subtype, age, gender and IBD medications...
January 2017: Alimentary Pharmacology & Therapeutics
https://www.readbyqxmd.com/read/27933684/enhancement-of-ag-based-plasmonic-photocatalysis-in-the-hydrogen-production-from-ammonia-borane-by-the-assist-of-single-site-ti-oxide-moiety-within-the-silica-framework
#18
Priyanka Verma, Yasutaka Kuwahara, Kohsuke Mori, Hiromi Yamashita
Ag nanoparticles (NPs) have gained great attention owing to their interesting plasmonic properties showing efficient catalysis under visible light irradiation. In this study, Ag-based plasmonic catalyst supported on the mesoporous silica involving isolated and tetrahedrally coordinated single-site Ti-oxide moieties, Ag/Ti-SBA-15, has been designed with the purpose of utilizing the broad spectrum range of solar energy. The Ti-SBA-15 support allows the deposition of small Ag NPs with a narrow size distribution...
December 9, 2016: Chemistry: a European Journal
https://www.readbyqxmd.com/read/27933682/high-efficient-intramolecular-electrochemiluminescence-energy-transfer-for-ultrasensitive-bioanalysis-of-aflatoxin-m1
#19
Jiali Liu, Min Zhao, Ying Zhuo, Yaqin Chai, Ruo Yuan
The intermolecular electrochemiluminescence resonance energy transfer (ECL-RET) between luminol and Ru(bpy)32+ was studied extensively to achieve the sensitive bio-analysis owing to the perfect spectral overlap of the donor and acceptor, but it still suffers from the challenging issue of low energy transfer efficiency. Here, the intramolecular ECL-RET towards the novel ECL compound containing the donor of luminol and the acceptor of Ru(bpy)2(mcbpy)2+ was designed and investigated for the first time (The compound was abbreviated as Lum-Ru)...
December 8, 2016: Chemistry: a European Journal
https://www.readbyqxmd.com/read/27933681/evaluating-a-primary-care-psychology-service-in-ireland-a-survey-of-stakeholders-and-psychologists
#20
Mark Corcoran, Michael Byrne
Primary care psychology services (PCPS) represent an important resource in meeting the various health needs of our communities. This study evaluated the PCPS in a two-county area within the Republic of Ireland. The objectives were to (i) examine the viewpoints of the service for both psychologists and stakeholders (healthcare professionals only) and (ii) examine the enactment of the stepped care model of service provision. Separate surveys were sent to primary care psychologists (n = 8), general practitioners (GPs; n = 69) and other stakeholders in the two counties...
December 8, 2016: Health & Social Care in the Community
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