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Anika Wranke, Beatriz Calle Serrano, Benjamin Heidrich, Janina Kirschner, Birgit Bremer, Patrick Lehmann, Svenja Hardtke, Katja Deterding, Kerstin Port, Max Westphal, Michael P Manns, Markus Cornberg, Heiner Wedemeyer
BACKGROUND: Hepatitis delta is the most severe form of viral hepatitis. Pegylated interferon alfa (PEG- IFNα) is effective in only 25-30% of patients and is associated with frequent side effects. The aim of this study was to analyze the clinical long-term outcome of hepatitis delta in relation to different antiviral treatment strategies. METHODS: We studied 136 anti-HDV-positive patients who were followed for at least 6 months in a retrospective single-center cohort (mean time of follow up 5...
October 22, 2016: Hepatology: Official Journal of the American Association for the Study of Liver Diseases
Bertram J Wilm, Christoph Barmet, Simon Gross, Lars Kasper, S Johanna Vannesjo, Max Haeberlin, Benjamin E Dietrich, David O Brunner, Thomas Schmid, Klaas P Pruessmann
PURPOSE: The purpose of this work was to improve the quality of single-shot spiral MRI and demonstrate its application for diffusion-weighted imaging. METHODS: Image formation is based on an expanded encoding model that accounts for dynamic magnetic fields up to third order in space, nonuniform static B0 , and coil sensitivity encoding. The encoding model is determined by B0 mapping, sensitivity mapping, and concurrent field monitoring. Reconstruction is performed by iterative inversion of the expanded signal equations...
October 21, 2016: Magnetic Resonance in Medicine: Official Journal of the Society of Magnetic Resonance in Medicine
Michael J Cooney
Enzyme kinetics is the study of the chemical reactions that are catalyzed by enzymes, with a focus on their reaction rates. The study of an enzyme's kinetics considers the various stages of activity, reveals the catalytic mechanism of this enzyme, correlates its value to assay conditions, and describes how a drug or a poison might inhibit the enzyme. Victor Henri initially reported that enzyme reactions were initiated by a bond between the enzyme and the substrate. By 1910, Michaelis and Menten were advancing their work by studying the kinetics of an enzyme saccharase which catalyzes the hydrolysis of sucrose into glucose and fructose...
2017: Methods in Molecular Biology
Yumiko Ohbayashi, Fumi Nakai, Akinori Iwasaki, Takaaki Ogawa, Yuka Yamamoto, Yoshihiro Nishiyama, Minoru Miyake
The duration of antiresorptive therapy is an important risk factor for medication-related osteonecrosis of the jaw. We performed a pilot study using quantitative analysis by bone scintigraphy to test the hypothesis that mandibular metabolism is affected by long-term bisphosphonate (BP) therapy. Our primary objectives were to assess changes in bone metabolism of the mandible in response to long-term BP therapy and compare the bone metabolism changes of the mandible with other bone sites. We compared the metabolic difference at the site in the mandible unaffected by disease, the humerus and the femur between 14 osteoporosis patients who were being treated with BP (BP group) and 14 patients who were not being treated with BP (control group) using a quantitative analysis and bone scintigraphy...
October 21, 2016: Odontology
Ahmet Kemal Aloglu, Peter de B Harrington, Saliha Sahin, Cevdet Demir
Four different data representations were evaluated for the determination of the total antioxidant activities of four different Prunella L. species, which are Prunella vulgaris, Prunella grandiflora, Prunella laciniata, and Prunella orientalis Bornm. Three different antioxidant assays, 2,2'-azino-bis(3-ethylbenzothiazoline-6-sulfonic acid) (ABST), 2,2-diphenyl-1-picrylhydrazyl (DPPH), and Folin-Ciocalteu (FC) reagent measured the total antioxidant activity and phenolic content of the four Prunella L. species that were extracted with 12 different solvent systems...
December 1, 2016: Talanta
L M M Lê, A Tfayli, J Zhou, P Prognon, A Baillet-Guffroy, E Caudron
Raman spectroscopy is a rapid, non-destructive and non-invasive method that is a promising tool for real-time analytical control of drug concentrations. This study evaluated a handheld Raman device to discriminate and quantify two isomeric drugs used to treat cancer. Doxorubicin (DOXO) and epirubicin (EPIR) samples were analyzed at therapeutic concentrations from 0.1 to 2mg/mL (n=90) and 0.08-2mg/mL (n=90) by non-invasive measurements using a portable Raman spectrometer. The discrimination of these two molecules was demonstrated for all concentrations (n=180) by qualitative analysis using partial least square discriminant analysis (PLS-DA) with 100% classification accuracy, sensitivity and specificity and 0% error rate...
December 1, 2016: Talanta
Camilla T Damsgaard, Lotte Lauritzen, Hanne Hauger, Stine Vuholm, Marie N Teisen, Christian Ritz, Max Hansen, Janni Niclasen, Christian Mølgaard
BACKGROUND: Most children in Western populations do not meet recommendations for fish consumption. Oily fish is an important source of n-3 long-chain polyunsaturated fatty acids (LCPUFA), which reduce blood pressure and plasma triacylglycerol in adults and may affect cognitive development and behavior. However, to our knowledge, the potential effects of oily fish on cardiometabolic health, cognitive function, and behavior in children have not been investigated. The aim of the FiSK Junior study is to investigate the effects of oily fish consumption on cardiovascular risk markers, cognitive function, and behavior in healthy children...
October 21, 2016: Trials
Charlotte Woodhead, Ruth Cunningham, Mark Ashworth, Elizabeth Barley, Robert J Stewart, Max J Henderson
BACKGROUND: Breast and cancer screening uptake has been found to be lower among women with serious mental illness (SMI). This study aims to corroborate these findings in the UK and to identify variation in screening uptake by illness/treatment factors, and primary care consultation frequency. METHODS: Linked population-based primary and secondary care data from the London borough of Lambeth (UK) were used to compare breast and cervical screening receipt among linked eligible SMI patients (n = 625 and n = 1393), to those without SMI known only to primary care (n = 106,554 and n = 25,385) using logistic regression models adjusted first for socio-demographic factors and second, additionally for primary care consultation frequency...
October 21, 2016: BMC Cancer
Salma Al-Karmi, Silvia A Albu, Alyssa Vito, Nancy Janzen, Shannon Czorny, Laura Banevicius, Max Nanao, Jon Zubieta, Alfredo Capretta, John F Valliant
Hydrocyanine dyes are sensitive "turn-on" type optical probes that can detect reactive oxygen species (ROS). We have developed a method to prepare an 18F-labeled hydrocyanine dye as a multi-modal PET and optical "turn-on" probe. A commercially available NIR dye was modified with a fluorinated prosthetic group that did not alter its ROS sensing properites in the presence of superoxide and hydroxyl radicals. The 18F-labeled analogue was produced using a single step terminal fluorination procedure. PET imaging and quantitative in vivo biodistribution studies indicated this novel probe had remarkably different pharmacokinetics compared to the oxidized cyanine analogue...
October 21, 2016: Chemistry: a European Journal
Robinson L Contiero, Denis F Biffe, Jamil Constantin, Rubem S de Oliveira, Guilherme B P Braz, Felipe R Lucio, Jerome J Schleier
The objective of this study was to evaluate the effects of nozzle types and 2,4-D formulations on spray deposition on different targets. Two field experiments were carried out in a completely randomized design, and treatments were arranged in a factorial scheme. Species in experiment 1 were Sumatran fleabane (Conyza sumatrensis) and Brazil pusley (Richardia brasiliensis) and in experiment 2 were soybeans (Glycine max) and Benghal dayflower (Commelina benghalensis). For both experiments, the first factor corresponded to spray nozzles with different settings (AD 110...
October 21, 2016: Journal of Environmental Science and Health. Part. B, Pesticides, Food Contaminants, and Agricultural Wastes
Daniel J Peart, Andy Hensby, Matthew P Shaw
The purpose of this study was to compare markers of hydration during sub-maximal exercise and subsequent time trial performance when consuming water (PW) or coconut water (CW). There was also a secondary aim to assess the palatability of CW during exercise and voluntary intake during intense exercise. 10 males (age 27.9 + 4.9 years, body mass 78.1 + 10.1kg, average max minute power 300.2 + 28.2W) completed 60-min of sub-maximal cycling followed by a 10-km time trial on two occasions. During these trials participants consumed either PW or CW in a randomised manner, drinking a 250 ml of the assigned drink between 10-15 min, 25-30 min and 40-45 min, and then drinking ad libitum from 55-min until the end of the time trial...
October 21, 2016: International Journal of Sport Nutrition and Exercise Metabolism
Sajjad Karim, Hend Fakhri NourEldin, Heba Abusamra, Nada Salem, Elham Alhathli, Joel Dudley, Max Sanderford, Laura B Scheinfeldt, Sudhir Kumar
BACKGROUND: Genome-wide association studies (GWAS) have become a mainstay of biological research concerned with discovering genetic variation linked to phenotypic traits and diseases. Both discrete and continuous traits can be analyzed in GWAS to discover associations between single nucleotide polymorphisms (SNPs) and traits of interest. Associations are typically determined by estimating the significance of the statistical relationship between genetic loci and the given trait. However, the prioritization of bona fide, reproducible genetic associations from GWAS results remains a central challenge in identifying genomic loci underlying common complex diseases...
October 17, 2016: BMC Genomics
Martin Hetzl, Max Kraut, Julia Winnerl, Luca Francaviglia, Markus Döblinger, Sonja Matich, Anna Fontcuberta I Morral, Martin Stutzmann
We demonstrate the selective area growth of GaN-AlGaN core-shell nanowire heterostructures directly on Si (111). Photoluminescence spectroscopy on as-grown nanowires reveals a strong blueshift of the GaN band gap from 3.40 eV to 3.64 eV at room temperature. Raman measurements relate this shift to compressive strain within the GaN core. On the nano-scale, cathodoluminescence spectroscopy and scanning transmission electron microscopy prove the homogeneity of strain-related luminescence along the NW axis and the absence of significant fluctuations within the shell, respectively...
October 21, 2016: Nano Letters
Benoit Peyronnet, Grégoire Robert, Vincent Comat, Morgan Rouprêt, Fernando Gomez-Sancha, Jean-Nicolas Cornu, Vincent Misrai
PURPOSE: To compare the learning curves, perioperative and early functional outcomes after HoLEP and GreenLEP. METHODS: Data from the first 100 consecutive cases treated by GreenLEP and HoLEP by two surgeons were prospectively collected from dedicated databases and analysed retrospectively. En-bloc GreenLEP and two-lobar HoLEP enucleations were conducted using the GreenLight HPS™ 2090 laser and Lumenis™ holmium laser. Patients' characteristics, perioperative outcomes and functional outcomes after 1, 3 and 6 months were compared between groups...
October 20, 2016: World Journal of Urology
Maria Danielsen, Andreas Kjaer, Max Wu, Lea Martineau, Mehdi Nosrati, Stanley Pl Leong, Richard W Sagebiel, James R Miller Iii, Mohammed Kashani-Sabet
Positron emission tomography/computed tomography (PET/CT) is an important tool to identify occult melanoma metastasis. To date, it is controversial which patients with primary cutaneous melanoma should have staging PET/CT. In this retrospective analysis of more than 800 consecutive patients with cutaneous melanoma, we sought to identify factors predictive of PET/CT positivity in the setting of newly-diagnosed high-risk primary melanoma to determine those patients most appropriate to undergo a PET/CT scan as part of their diagnostic work up...
2016: American Journal of Nuclear Medicine and Molecular Imaging
Anthony Gonçalves, François Bertucci, Arnaud Guille, Severine Garnier, José Adelaide, Nadine Carbuccia, Oliver Cabaud, Pascal Finetti, Serge Brunelle, Gilles Piana, Jeanne Tomassin-Piana, Maria Paciencia, Eric Lambaudie, Cornel Popovici, Renaud Sabatier, Carole Tarpin, Magali Provansal, Jean-Marc Extra, François Eisinger, Hagay Sobol, Patrice Viens, Marc Lopez, Christophe Ginestier, Emmanuelle Charafe-Jauffret, Max Chaffanet, Daniel Birnbaum
BACKGROUND: Routine feasibility and clinical impact of genomics-based tumor profiling in advanced breast cancer (aBC) remains to be determined. We conducted a pilot study to evaluate whether precision medicine could be prospectively implemented for aBC patients in a single center and to examine whether patient-derived tumor xenografts (PDX) could be obtained in this population. RESULTS: Thirty-four aBC patients were included. Actionable targets were found in 28 patients (82%)...
October 18, 2016: Oncotarget
Silvia Valtorta, Massimo Moro, Giovanna Prisinzano, Giulia Bertolini, Monica Tortoreto, Isabella Raccagni, Ugo Pastorino, Luca Roz, Gabriella Sozzi, Rosa Maria Moresco
PURPOSE: Lung cancer heterogeneity makes response to therapy extremely hard to predict. Patient-derived xenografts (PDXs) represent a reliable preclinical model that closely recapitulates the main characteristics of the primary tumor and could represent a useful asset to test new therapies. Here, using PET imaging, we verify how lung cancer PDXs reproduce the metabolic features of the corresponding primary tumors. METHODS: We performed longitudinal [(18)F]FDG-PET studies on nine different PDXs, obtained by implants of primary cancer fragments harvested from patients...
October 20, 2016: Journal of Nuclear Medicine: Official Publication, Society of Nuclear Medicine
Caitlin G Howe, Xinhua Liu, Megan N Hall, Vesna Ilievski, Marie A Caudill, Olga Malysheva, Angela M Lomax-Luu, Faruque Parvez, Abu B Siddique, Hasan Shahriar, Mohammad N Uddin, Tariqul Islam, Joseph H Graziano, Max Costa, Mary V Gamble
BACKGROUND: Posttranslational histone modifications (PTHMs) are altered by arsenic, an environmental carcinogen. PTHMs are also influenced by nutritional methyl donors involved in one-carbon metabolism (OCM), which may protect against epigenetic dysregulation. METHODS: We measured global levels of three PTHMs, which are dysregulated in cancers (H3K36me2, H3K36me3, H3K79me2), in peripheral blood mononuclear cells (PBMCs) from 324 participants enrolled in the Folic Acid and Creatine Trial, a randomized trial in arsenic-exposed Bangladeshi adults...
October 20, 2016: Cancer Epidemiology, Biomarkers & Prevention
Wyller Max Ferreira Silva, Bárbara Biduski, Karina Oliveira Lima, Vânia Zanella Pinto, Jéssica Fernanda Hoffmann, Nathan Levien Vanier, Alvaro Renato Guerra Dias
The objective of this study was to evaluate the effects of the heat-moisture treatment (HMT) applied to paddy rice grains on the physicochemical properties, in vitro starch digestibility, and molecular weight distribution of proteins in rice flour. The paddy rice grains were adjusted to 13%, 16%, and 18% moisture and autoclaved at 121°C for 30 and 60min. The HMT promoted a reduction of the amylose content, the swelling power, and the solubility of the rice flour. Changes in the relative crystallinity and molecular weight of the proteins extracted with a sodium phosphate buffer containing 2...
March 15, 2017: Food Chemistry
Seung Kyum Kim, Joshua J Avila, Michael P Massett
Understanding the genetic influence on vascular reactivity is important for identifying genes underlying impaired vascular function. The purpose of this study was to characterize the genetic contribution to intrinsic vascular function and to identify loci associated with phenotypic variation in vascular reactivity in mice. Concentration response curves to phenylephrine (PE), potassium chloride (KCl), acetylcholine (ACh), and sodium nitroprusside (SNP) were generated in aortic rings from male mice (12-wk old) from 27 inbred mouse strains...
October 7, 2016: Physiological Genomics
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