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https://www.readbyqxmd.com/read/28548856/decorated-cyclopentadienes-from-acetylene-and-ketones-in-just-two-steps
#1
Elena Yu Schmidt, Ivan A Bidusenko, Igor' A Ushakov, Alexander V Vashchenko, Boris A Trofimov
The products of the one-pot assembly of acetylene and ketones in the KOH/DMSO system, 7-methylene-6,8-dioxabicyclo[3.2.1]octanes, undergo an acid-catalyzed (CF3COOH, room temperature) rearrangement to rarely substituted cyclopentadienes in good-to-excellent yields. The mechanism of the rearrangement has been supported by the isolation and corresponding transformations of two intermediates.
May 26, 2017: Organic Letters
https://www.readbyqxmd.com/read/28547897/mannich-curcuminoids-as-potent-anticancer-agents
#2
Márió Gyuris, László Hackler, Lajos I Nagy, Róbert Alföldi, Eszter Rédei, Annamária Marton, Tibor Vellai, Nóra Faragó, Béla Ózsvári, Anasztázia Hetényi, Gábor K Tóth, Péter Sipos, Iván Kanizsai, László G Puskás
A series of novel curcuminoids were synthesised for the first time via a Mannich-3CR/organocatalysed Claisen-Schmidt condensation sequence. Structure-activity relationship (SAR) studies were performed by applying viability assays and holographic microscopic imaging to these curcumin analogues for anti-proliferative activity against A549 and H1975 lung adenocarcinoma cells. The TNFα-induced NF-κB inhibition and autophagy induction effects correlated strongly with the cytotoxic potential of the analogues. Significant inhibition of tumour growth was observed when the most potent analogue 44 was added in liposomes at one-sixth of the maximally tolerated dose in the A549 xenograft model...
May 26, 2017: Archiv der Pharmazie
https://www.readbyqxmd.com/read/28547782/due-to-potential-concerns-of-bias-and-conflicts-of-interest-regulatory-bodies-should-not-do-evaluation-methodology-research-related-to-their-regulatory-missions
#3
Dev P Chakraborty, Robert M Nishikawa, Colin G Orton
One of the major roles of regulatory bodies is to enforce rules and thus maintain standards. They also often do research related to their missions, some of which might be used to establish the standards they are regulating and how they should be evaluated. This has led some to believe that, due to potential concerns of bias and conflicts of interest, regulatory bodies should not do evaluation methodology research related to their regulatory missions. This is the claim that is debated in this month's Point/Counterpoint...
May 26, 2017: Medical Physics
https://www.readbyqxmd.com/read/28546574/corrigendum-a-study-of-allelic-diversity-underlying-flowering-time-adaptation-in-maize-landraces
#4
J Alberto Romero Navarro, Martha Wilcox, Juan Burgueño, Cinta Romay, Kelly Swarts, Samuel Trachsel, Ernesto Preciado, Arturo Terron, Humberto Vallejo Delgado, Victor Vidal, Alejandro Ortega, Armando Espinoza Banda, Noel Orlando Gómez Montiel, Ivan Ortiz-Monasterio, Félix San Vicente, Armando Guadarrama Espinoza, Gary Atlin, Peter Wenzl, Sarah Hearne, Edward S Buckler
No abstract text is available yet for this article.
May 26, 2017: Nature Genetics
https://www.readbyqxmd.com/read/28546061/primary-biliary-cholangitis-advances-in-management-and-treatment-of-the-disease
#5
Pietro Invernizzi', Annarosa Floreani, Marco Carbone, Marco Marzioni, Antonio Craxi, Luigi Muratori, Umberto Vespasiani Gentilucci, Ivan Gardini, Antonio Gasbarrini, Paola Krugeri, Francesco Saverio Mennini, Virginia Ronco, Elena Lanati, Pier Luigi Canonico, Domenico Alvaro
Primary Biliary Cholangitis, previously known as Primary Biliary Cirrhosis, is a rare disease, which mainly affects women in their fifth to seventh decades of life. It is a chronic autoimmune disease characterized by a progressive damage of interlobular bile ducts leading to ductopenia, chronic cholestasis and bile acids retention. Even if the disease usually presents a long asymptomatic phase and a slow progression, in many patients it may progress faster toward cirrhosis and its complications. The 10year mortality is greater than in diseases such as human immunodeficiency virus/Hepatitis C Virus coinfection and breast cancer...
May 8, 2017: Digestive and Liver Disease
https://www.readbyqxmd.com/read/28545571/survival-and-prognostic-factors-for-survival-cancer-specific-survival-and-disease-free-interval-in-239-patients-with-hurthle-cell-carcinoma-a-single-center-experience
#6
Branisav Oluic, Ivan Paunovic, Zlatibor Loncar, Vladimir Djukic, Aleksandar Diklic, Milan Jovanovic, Zeljko Garabinovic, Nikola Slijepcevic, Branislav Rovcanin, Dusan Micic, Aleksandar Filipovic, Vladan Zivaljevic
BACKGROUND: Hurthle cell carcinoma makes up 3 to 5% of all thyroid cancers and is considered to be a true rarity. The aim of our study was to analyze clinical characteristics and survival rates of patients with Hurthle cell carcinoma. METHODS: Clinical data regarding basic demographic characteristics, tumor grade, type of surgical treatment and vital status were collected. Methods of descriptive statistics and Kaplan-Meier survival curves were used for statistical analysis...
May 25, 2017: BMC Cancer
https://www.readbyqxmd.com/read/28545263/the-effect-of-sulphate-anions-on-the-ultrafine-titania-nucleation
#7
Volodymyr O Kotsyubynsky, Ivan F Myronyuk, Volodymyr L Chelyadyn, Andriy B Hrubiak, Volodymyr V Moklyak, Sofia V Fedorchenko
The phenomenological model of sulphate anions effect on the nanodispersed titania synthesis during hydrolysis of titanium tetrachloride was studied. It was proposed that both chelating and bridging bidentate complexes formation between sulphate anions and octahedrally coordinated [Ti(OH)h(OH2)6-h]((4-h)+) mononers is the determinative factor for anatase phase nucleation.
December 2017: Nanoscale Research Letters
https://www.readbyqxmd.com/read/28544986/morphometric-characteristics-of-neutrophils-stimulated-by-adhesion-and-hypochlorite
#8
Tatsiana Kuznetsova, Tatsiana Kulahava, Ivan Zholnerevich, Nadezda Amaegberi, Galina Semenkova, Oleg Shadyro, Juergen Arnhold
The aim of this work was to compare cell form, size and volume as well as the locomotor activity of polymorphonuclear leukocytes (PMNLs) stimulated by adhesion to glass and exposed to hypochlorous acid at non-toxic dose. After 20min of adhesion to a glass surface, volume, cell surface area and projection area of PMNLs were equaled to 143.1±21.4μm(3), 288.8±28.8μm(2) and 248.3±32.3μm(2), respectively. Projection area of PMNLs exposed to NaOCl was noticeably enlarged as compared with control samples. The cell volume of 20min adherent cells exposed to NaOCl was enlarged in comparison with both control cells and 5min adhered exposed to NaOCl cells...
May 22, 2017: Molecular Immunology
https://www.readbyqxmd.com/read/28544905/high-serum-levels-of-soluble-interleukin-2-receptor-sil2-r-interleukin-6-il-6-and-tumor-necrosis-factor-alpha-tnf-are-associated-with-adverse-clinical-features-and-predict-poor-outcome-in-diffuse-large-b-cell-lymphoma
#9
Ivan Dlouhy, Xavier Filella, Jordina Rovira, Laura Magnano, Alfredo Rivas-Delgado, Tycho Baumann, Alejandra Martínez-Trillos, Olga Balagué, Antonio Martínez, Blanca González-Farre, Kennosuke Karube, Eva Gine, Julio Delgado, Elías Campo, Armando López-Guillermo
Diffuse large B-cell lymphoma (DLBCL) is an aggressive lymphoma with heterogeneous outcomes. To improve accuracy of the international prognostic index score, new biological variables are being investigated. The aim of this study was to determine the prognostic significance of serum levels of different cytokines, namely soluble interleukin-2 receptor (sIL2-R), interleukin-6 (IL-6) and tumor necrosis factor alpha (TNF). We analyzed 197 de novo DLBCL patients (91 M/106 F; median age 66 years) treated with immunochemotherapy in a single institution...
May 17, 2017: Leukemia Research
https://www.readbyqxmd.com/read/28544598/from-extended-nano-fluidics-to-an-autonomous-solar-light-driven-micro-fuel-cell-device
#10
Yuriy Pihosh, Jin Uemura, Ivan Turkevych, Kazuma Mawatari, Yutaka Kazoe, Adelina Smirnova, Takehiko Kitamori
Autonomous micro/nano mechanical, chemical and biomedical sensors require persistent power sources scaled to their size. Realization of autonomous micro-power sources is a challenging task, as it requires combination of wireless energy supply, conversion, storage and delivery to the sensor. In this work, we realized solar light driven power source that consists of a micro fuel cell (μFC) and a photocatalytic micro fuel generator (μFG) integrated on a single microfluidic chip. The μFG produces hydrogen by photocatalytic water splitting under solar light...
May 23, 2017: Angewandte Chemie
https://www.readbyqxmd.com/read/28543826/helically-chiral-peptides-containing-ferrocene-1-1-diamine-scaffold-as-a-turn-inducer
#11
Lidija Barisic, Monika Kovacevic, Ivan Kodrin, Suncica Roca, Kresimir Molcanov, Yuning Shen, Bimalendu Adhikari, Heinz-Bernhard Kraatz
A series of peptides containing homo- and heterochiral Ala-Pro sequences attached to the turn inducing ferrocene-1,1'-diamine scaffold was synthesized. The effects of the backbone chirality and N-terminal group (Boc/Ac) on the conformational properties of the novel peptidomimetics were thoroughly explored by IR, NMR and CD spectroscopies as well as corroborated by DFT studies in solution. The most stable conformers of the homochiral peptides adopt the interstrand hydrogen bonding patterns, realized through ten- and thirteen-membered rings...
May 24, 2017: Chemistry: a European Journal
https://www.readbyqxmd.com/read/28543532/intraepidermal-merkel-cell-carcinoma-a-case-series-of-a-rare-entity-with-clinical-follow-up
#12
George Jour, Phyu P Aung, Eduardo Rozas-Muñoz, Johnathan L Curry, Victor Prieto, Doina Ivan
BACKGROUND: Merkel cell carcinoma (MCC) is a rare but aggressive cutaneous carcinoma. MCC involves typically dermis and although epidermotropism has been reported, MCC strictly intraepidermal or in situ (MCCIS) is exceedingly rare. Most of the cases of MCCIS described so far have associated other lesions, such as squamous or basal cell carcinoma, actinic keratosis, etc. Herein, we describe three patients with MCC strictly in situ, without a dermal component. METHODS: Our patients were elderly, two of the lesions involved the head and neck area and one was on a finger...
May 23, 2017: Journal of Cutaneous Pathology
https://www.readbyqxmd.com/read/28543439/metagenomic-profiling-of-the-microbial-freshwater-communities-in-two-bulgarian-reservoirs
#13
Ivan Iliev, Galina Yahubyan, Mariana Marhova, Elena Apostolova, Mariyana Gozmanova, Gana Gecheva, Sonya Kostadinova, Angelina Ivanova, Vesselin Baev
Microorganisms inhabiting freshwater environments are an integral part of the aquatic ecosystems. Very few data are available regarding the profiles of the microbial communities in the reservoirs in Bulgaria, despite their key role in the biogeochemical processes. In the present study, we provide the first comprehensive metagenomic analysis on the planktonic bacterial diversity of two large and economically important Bulgarian reservoirs (Batak and Tsankov Kamak) using next-generation sequencing of 16S ribosomal RNA gene (16S rRNA)...
May 22, 2017: Journal of Basic Microbiology
https://www.readbyqxmd.com/read/28542799/global-sensitivity-analysis-for-repeated-measures-studies-with-informative-drop-out-a-semi-parametric-approach
#14
Daniel Scharfstein, Aidan McDermott, Iván Díaz, Marco Carone, Nicola Lunardon, Ibrahim Turkoz
In practice, both testable and untestable assumptions are generally required to draw inference about the mean outcome measured at the final scheduled visit in a repeated measures study with drop-out. Scharfstein et al. (2014) proposed a sensitivity analysis methodology to determine the robustness of conclusions within a class of untestable assumptions. In their approach, the untestable and testable assumptions were guaranteed to be compatible; their testable assumptions were based on a fully parametric model for the distribution of the observable data...
May 23, 2017: Biometrics
https://www.readbyqxmd.com/read/28542657/-polygraphy-in-hospitalized-children-under-3-months
#15
Daniel Zenteno, Iván Rodríguez-Núñez, Ignacio Molina, Rubén Peña, Carla Rivas, Jaime Tapia, Pablo Brockmann
Apnea and apparently lethal events have great etiological diversity thus complementary tests may help diagnosis. The aim of this study was to describe the results of polygraph studies of children under 3 months hospitalized with suspected apnea. PATIENTS AND METHODS: Retrospective case series. Children under 3 months with suspected apnea were considered and in whom a polygraphy (PG) was performed during hospitalization. General data, the apnea/hypopnea index (AHI), index of central. apnea, obstructive apnea index, average and minimum saturation were recorded...
April 2017: Revista Chilena de Pediatría
https://www.readbyqxmd.com/read/28542436/stress-induced-release-of-oct-1-from-the-nuclear-envelope-is-mediated-by-jnk-phosphorylation-of-lamin-b1
#16
Ivan I Boubriak, Ashraf N Malhas, Marek M Drozdz, Lior Pytowski, David J Vaux
The nuclear lamina can bind and sequester transcription factors (TFs), a function lost if the lamina is abnormal, with missing or mutant lamin proteins. We now show that TF sequestration is not all-or-nothing, but a dynamic physiological response to external signals. We show that the binding of the ubiquitous TF, Oct-1, to lamin B1 was reversed under conditions of cellular stress caused, inter alia, by the chemical methylating agent methylmethanesulfonate (MMS). A search for lamin B1 post-translational modifications that might mediate changes in Oct-1 binding using kinase inhibitors uncovered a role for c-Jun N-terminal kinase (JNK)...
2017: PloS One
https://www.readbyqxmd.com/read/28541799/limited-engraftment-of-donor-microbiome-via-one-time-fecal-microbial-transplantation-in-treated-hiv-infected-individuals
#17
Ivan Vujkovic-Cvijin, Rachel L Rutishauser, Montha Pao, Peter W Hunt, Susan V Lynch, Joseph M McCune, Ma Somsouk
BACKGROUND: Many HIV-infected individuals on antiretroviral therapy (ART) exhibit persistent systemic inflammation, which predicts morbidity and mortality. ART-treated subjects concurrently exhibit marked compositional alterations in the gut bacterial microbiota and the degree of dysbiosis correlates with systemic inflammation. Whether interventions to modulate the microbiome can affect systemic inflammation is unknown. METHODS: An open-label fecal microbial transplantation (FMT) was delivered by colonoscopy to asymptomatic HIV-infected ART-suppressed individuals without antibiotic pre-treatment...
May 25, 2017: Gut Microbes
https://www.readbyqxmd.com/read/28540954/hydrazone-switches-and-things-in-between
#18
Ivan Aprahamian
This feature article surveys the various ways by which a structurally simple hydrazone can be used in accessing different functional materials, mainly photo/chemically activated switches, fluorophores and sensors. The modularity of this functional group enabled us to develop new switching mechanisms, pathways, cascades and loops, while addressing challenges in the field, such as waste accumulation, how to control cross-talk between different types of switches, developing photochromic compounds with benign activation wavelengths, among others...
May 25, 2017: Chemical Communications: Chem Comm
https://www.readbyqxmd.com/read/28540814/lyso-thermosensitive-liposomal-doxorubicin-for-treatment-of-bladder-cancer
#19
Andrew S Mikhail, Ayele H Negussie, William F Pritchard, Dieter Haemmerich, David Woods, Ivane Bakhutashvili, Juan Esparza-Trujillo, Sam J Brancato, John Karanian, Piyush K Agarwal, Bradford J Wood
PURPOSE: To evaluate lyso-thermosensitive liposomal doxorubicin (LTLD, ThermoDox(®)) in combination with loco-regional mild hyperthermia (HT) for targeted drug delivery to the bladder wall and potential treatment of bladder cancer. MATERIAL AND METHODS: Porcine in vivo studies were performed with the following groups: (i) intravenous (IV) LTLD with hyperthermia (LTLD + HT); (ii) IV doxorubicin (DOX) with hyperthermia (IV DOX + HT) and (iii) IV LTLD without hyperthermia (LTLD - HT)...
May 10, 2017: International Journal of Hyperthermia
https://www.readbyqxmd.com/read/28540356/data-on-expression-of-genes-involved-in-estrogen-and-progesterone-action-inflammation-and-differentiation-according-to-demographic-histopathological-and-clinical-characteristics-of-endometrial-cancer-patients
#20
Maša Sinreih, Saša Štupar, Luka Čemažar, Ivan Verdenik, Snježana Frković Grazio, Špela Smrkolj, Tea Lanišnik Rižner
Endometrial cancer is the sixth most common cancer in women worldwide. It is associated with aberrant actions of steroid hormones, estrogens and progesterone, but also with enhanced inflammation and reduced cellular differentiation. Here, we show data on demographic and histopathological characteristics of 51 patients with endometrial cancer, together with data on correlations between the expression of 38 genes involved in estrogen and progesterone actions, inflammation and differentiation, and demographic characteristics...
June 2017: Data in Brief
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