Viser treff 124-143 av 358

    • Fibroblast-induced switching to the mesenchymal-like phenotype and PI3K/mTOR signaling protects melanoma cells from BRAF inhibitors 

      Vasiliauskaite, Kotryna; Fleten, Karianne Giller; Barkovskaya, Anna; Nygaard, Vigdis; Haugen, Mads Haugland; Engesæter, Birgit Øvstebø; Mælandsmo, Gunhild; Prasmickaite, Lina (Journal article; Tidsskriftartikkel; Peer reviewed, 2016)
      The knowledge on how tumor-associated stroma influences efficacy of anti-cancer therapy just started to emerge. Here we show that lung fibroblasts reduce melanoma sensitivity to the BRAF inhibitor (BRAFi) vemurafenib only if the two cell types are in close proximity. In the presence of fibroblasts, the adjacent melanoma cells acquire de-differentiated mesenchymal-like phenotype. Upon treatment with ...
    • First in vivo evaluation of a potential SPECT brain radiotracer for the gonadotropin releasing hormone receptor 

      Fjellaksel, Richard; Oteiza, Ana; Martin, armas maria montserrat; Riss, Patrick; Hjelstuen, Ole Kristian; Kuttner, Samuel; Hansen, Jørn H; Sundset, Rune (Journal article; Tidsskriftartikkel; Peer reviewed, 2018-11-09)
      <p><i>Objectives</i>: In vivo evaluations of a gonadotropin releasing hormone-receptor single photon emission computed tomography radiotracer for non-invasive detection of gonadotropin releasing homone-receptors in brain.</p> <p><i>Results</i>: We have used a simple, robust and high-yielding procedure to radiolabel an alpha-halogenated bioactive compound with high radiochemical yield. Literature ...
    • Fitness costs of various mobile genetic elements in Enterococcus faecium and Enterococcus faecalis 

      Starikova, Irina; Al-Haroni, Mohammed; Werner, Guido; Roberts, Adam P.; Nielsen, Kåre M.; Johnsen, Pål Jarle (Journal article; Tidsskriftartikkel; Peer reviewed, 2013-07-05)
      Objectives: To determine the fitness effects of various mobile genetic elements (MGEs) in Enterococcus faecium and Enterococcus faecalis when newly acquired. We also tested the hypothesis that the biological cost of vancomycin resistance plasmids could be mitigated during continuous growth in the laboratory.<p> <p>Methods: Different MGEs, including two conjugative transposons (CTns) of the Tn916 ...
    • Following the fate of dye-containing liposomes in vitro 

      Cauzzo, Jennifer; Nystad, Mona; Holsæter, Ann Mari; Basnet, Purusotam; Skalko-Basnet, Natasa (Journal article; Tidsskriftartikkel; Peer reviewed, 2020-07-09)
      The rather limited success of translation from basic research to clinical application has been highlighted as a major issue in the nanomedicine field. To identify the factors influencing the applicability of nanosystems as drug carriers and potential nanomedicine, we focused on following their fate through fluorescence-based assays, namely flow cytometry and imaging. These methods are often used to ...
    • Fractional integral-like processing in retinal cones reduces noise and improves adaptation 

      Martinecz, Antal; Niitsuma, Mihoko (Journal article; Tidsskriftartikkel; Peer reviewed, 2018-10-04)
      In the human retina, rod and cone cells detect incoming light with a molecule called rhodopsin. After rhodopsin molecules are activated (by photon impact), these molecules activate the rest of the signalling process for a brief period of time until they are deactivated by a multistage process. First, active rhodopsin is phosphorylated multiple times. Following this, they are further inhibited by the ...
    • From Paper to E-Prescribing of Multidose Drug Dispensing: A Qualitative Study of Workflow in a Community Care Setting 

      Jøsendal, Anette Vik; Bergmo, Trine Strand (Journal article; Tidsskriftartikkel; Peer reviewed, 2021-02-16)
      E-prescribing is now widespread and, in some countries, has completely replaced paper prescriptions. In Norway, almost all prescribing is electronic, except for multidose drug dispensing (MDD), which is still sent to the pharmacy by fax or ordinary mail. MDD is an adherence aid used by one-third of all patients receiving home care services. In this paper, we present results from a qualitative study ...
    • Gene transfer potential of outer membrane vesicles of Acinetobacter baylyi and effects of stress on vesiculation 

      Fulsundar, Shweta; Harms, Klaus; Flaten, Gøril Eide; Johnsen, Pål Jarle; Chopade, Balu Ananda; Nielsen, Kaare Magne (Journal article; Tidsskriftartikkel; Peer reviewed, 2014)
    • Generation of a PAX6 knockout glioblastoma cell line with changes in cell cycle distribution and sensitivity to oxidative stress 

      Hegge, Beate; Sjøttem, Eva; Mikkola, Ingvild (Journal article; Tidsskriftartikkel; Peer reviewed, 2018-05-02)
      <i><p>Background</i>: The transcription factor PAX6 is expressed in various cancers. In anaplastic astrocytic glioma, PAX6 expression is inversely related to tumor grade, resulting in low PAX6 expression in Glioblastoma, the highest-grade astrocytic glioma. The aim of the present study was to develop a PAX6 knock out cell line as a tool for molecular studies of the roles PAX6 have in attenuating ...
    • Genetic dominance governs the evolution and spread of mobile genetic elements in bacteria 

      Rodríguez-Beltrán, Jerónimo; Sørum, Vidar; Toll-Riera, Macarena; de la Vega, Carmen; Peña-Miller, Rafael; San Millán, Álvaro (Journal article; Tidsskriftartikkel; Peer reviewed, 2020-06-22)
      Mobile genetic elements (MGEs), such as plasmids, promote bacterial evolution through horizontal gene transfer (HGT). However, the rules governing the repertoire of traits encoded on MGEs remain unclear. In this study, we uncovered the central role of genetic dominance shaping genetic cargo in MGEs, using antibiotic resistance as a model system. MGEs are typically present in more than one copy per ...
    • Genetically determined reproductive aging and coronary heart disease: a bidirectional two-sample Mendelian Randomization 

      Dam, Veerle; Onland-Moret, N. Charlotte; Burgess, Stephen; Chirlaque, Maria Dolores; Peters, Sanne A.E.; Schuit, Ewoud; Tikk, Kaja; Weiderpass, Elisabete; Oliver-Williams, Clare; Wood, Angela M.; Tjønneland, Anne; Dahm, Christina C; Overvad, Kim; Boutron-Rualt, Marie-Christine; Schulze, Matthias B.; Trichopoulou, Antonia; Ferrari, Pietro; Masala, Giovanna; Krogh, Vittorio; Tumino, Rosario; Matullo, Giuseppe; Panico, Salvatore; Boer, Jolanda M. A.; Verschuren, W.M. Monique; Waaseth, Marit; Pérez, María José Sánchez; Amiano, Pilar; Imaz, Liher; Moreno-Iribas, Conchi; Melander, Olle; Harlid, Sophia; Nordendahl, Maria; Wennberg, Patrik; Key, Timothy J.; Riboli, Elio; Santiuste, Carmen; Kaaks, Rudolf; Katzke, Verena; Langenberg, Claudia; Wareham, Nicholas J.; Schunkert, Heribert; Erdmann, Jeanette; Willenborg, Christina; Hengstenberg, Christian; Kleber, Marcus E.; Delgado, Graciela; März, Winfried; Kanoni, Stavroula; Dedoussis, George; Deloukas, Panos; Nikpay, Majid; McPherson, Ruth; Scholz, Markus; Teren, Andrej; Butterworth, Adam S.; van der Schouw, Yvonne T. (Journal article; Tidsskriftartikkel; Peer reviewed, 2022-03-20)
      Background: Accelerated reproductive aging, in women indicated by early natural menopause, is associated with increased coronary heart disease (CHD) risk in observational studies. Conversely, an adverse CHD risk profile has been suggested to accelerate menopause.<p> <p>Objectives: To study the direction and evidence for causality of the relationship between reproductive aging and (non-)fatal CHD ...
    • The German ban on GM maize MON810: scientifically justified or unjustified? 

      Bøhn, Thomas; Primicerio, Raul; Traavik, Terje (Journal article; Tidsskriftartikkel; Peer reviewed, 2012)
    • Glyphosate non-toxicity: the genesis of a scientific fact 

      Cuhra, Marek (Journal article; Tidsskriftartikkel; Peer reviewed, 2015-09-30)
      Repetition of a 1978 experiment on the toxicity of glyphosate chemicals in water-flea Daphnia magna showed surprising results. In the 31 years which had passed between the two series of experiments, the toxicity of glyphosate had apparently become 300 times stronger! Further investigation into this enigmatic paradox discloses unfortunate aspects of laboratory researcher cultures as well as fundamental ...
    • Glyphosate-Residues in Roundup-Ready Soybean Impair Daphnia magna Life-Cycle 

      Cuhra, Marek; Traavik, Terje; Dando, Mickael; Primicerio, Raul; Holderbaum, Daniel Ferreira; Bøhn, Thomas (Journal article; Tidsskriftartikkel; Peer reviewed, 2015-01-30)
      Herbicide tolerant plants such as Roundup-Ready soybean contain residues of glyphosate herbicide. These residues are considered safe and previous animal-feeding-studies have failed to find negative effects related to such chemical residues. The present study tests 8 experimental soy- meal diets as feed in groups (each containing 20 individuals) of test-animals (D. magna). The diets have different ...
    • Glyphosate: too much of a good thing? 

      Cuhra, Marek; Bøhn, Thomas; Cuhra, Petr (Journal article; Tidsskriftartikkel; Peer reviewed, 2016-04-28)
      Although previously accepted as the less toxic alternative, with low impact on animals, farmers as well as consumers who are exposed to residues in food, glyphosate chemicals are now increasingly controversial as new evidence from research is emerging. We argue that specific aspects of the history, chemistry and safety of glyphosate and glyphosate-based herbicides should be thoroughly considered ...
    • Going skin deep: a direct comparison of penetration potential of lipid-based nanovesicles on the isolated perfused human skin flap model 

      Ternullo, Selenia; de Weerd, Louis; Holsæter, Ann Mari; Flaten, Gøril Eide; Skalko-Basnet, Natasa (Journal article; Tidsskriftartikkel, 2017-09-12)
      Phospholipid-based nanocarriers are attractive drug carriers for improved local skin therapy. In the present study, the recently developed isolated perfused human skin flap (IPHSF) model was used to directly compare the skin penetration enhancing potential of the three commonly used nanocarriers, namely conventional liposomes (CLs), deformable liposomes (DLs) and solid lipid nanoparticles (SLNs). ...
    • Helse- og miljørisikovurdering av genmodifisert bomullslinje MON 15985 fra Monsanto (EFSA/GMO/UK/2008/57): Uttalelse fra Faggruppe for genmodifiserte organismer i Vitenskapskomiteen for mattrygghet 

      Berdal, Knut G; Bøhn, Thomas; Clarke, Jihong; Finne, Merethe Aasmo; Holck, Askild Lorentz; Klungland, Helge; Linnestad, Casper; Meadow, Richard; Mikalsen, Arne; Myhr, Anne Ingeborg; Nerland, Audun Helge; Nes, Ingolf; Nielsen, Kaare Magne; Sorteberg, Hilde-Gunn Opsahl; Stabbetorp, Odd Egil; Vikse, Rose (Research report; Forskningsrapport, 2008-11-28)
      <i>Hovedbudskap</i>: Mattilsynet og Direktoratet for naturforvalting (DN) ber Vitenskapskomiteen for mattrygghet om å vurdere den genmodifiserte bomullslinjen MON 15985 til import, prosessering, og til bruk i næringsmidler og fôrvarer. Søknaden gjelder ikke dyrking. Monsanto søkte opprinnelig om godkjenning av bomullslinjen i 2005, men søknaden ble trukket og erstattet av vedlagte søknad i 2008. I ...
    • Helse- og miljørisikovurdering av genmodifisert mais MON 863 til import, prosessering og fôr under EU-direktiv 2001/18 (Notifikasjon C/DE/02/9). Uttalelse fra Faggruppe for genmodifiserte organismer i Vitenskapskomiteen for mattrygghet 

      Andreassen, Åshild Kristine; Brandtzæg, Per; Holck, Askild Lorentz; Junttila, Olavi; Konestabo, Heidi Sjursen; Meadow, Richard; Nielsen, Kaare Magne; Sorteberg, Hilde-Gunn Opsahl; Vikse, Rose (Research report; Forskningsrapport, 2013)
      <p>I forbindelse med forberedelse til implementering av EU-forordning 1829/2003 i norsk rett har Miljødirektoratet (tidligere Direktoratet for Naturforvalting) bedt Mattilsynet om vurderinger av alle genmodifiserte organismer (GMOer) og avledete produkter som inneholder eller består av GMOer som er godkjent under forordning 1829/2003 eller direktiv 2001/18, og som er godkjent for ett eller flere ...
    • High-Intensity Exercise Improves Fatigue, Sleep, and Mood in Patients With Axial Spondyloarthritis: Secondary Analysis of a Randomized Controlled Trial 

      Sveaas, Silje Halvorsen; Dagfinrud, Hanne; Berg, Inger Jorid; Provan, Sella Aarrestad; Johansen, Melissa Woll; Pedersen, Elisabeth; Bilberg, Annelie (Journal article; Tidsskriftartikkel; Peer reviewed, 2020-05-04)
      <i>Objective</i> - Although exercise is recommended in the treatment of axial spondyloarthritis (axSpa), the focus has been on flexibility, and the effect of high-intensity exercises is unknown. The purpose of this study was to investigate the effect of high-intensity exercises on fatigue, sleep, and mood in patients with axSpA.<br><br> <i>Methods</i> - In this secondary analysis of a randomized ...
    • A high-throughput multiplexing and selection strategy to complete bacterial genomes 

      Alonso, Sergio Arredondo; Pöntinen, Anna K.; Cleon, Francois Pierre Alexandre; Gladstone, Rebecca Ashley; Schürch, Anita C.; Johnsen, Pål Jarle; Samuelsen, Ørjan; Corander, Jukka (Journal article; Tidsskriftartikkel; Peer reviewed, 2021-12-09)
      Background: Bacterial whole-genome sequencing based on short-read technologies often results in a draft assembly formed by contiguous sequences. The introduction of long-read sequencing technologies permits those contiguous sequences to be unambiguously bridged into complete genomes. However, the elevated costs associated with long-read sequencing frequently limit the number of bacterial isolates ...
    • Host dependent maintenance of a blaNDM-1-encoding plasmid in clinical Escherichia coli isolates 

      Alves Gama, Joao Pedro; Kloos, Julia Maria; Johnsen, Pål Jarle; Samuelsen, Ørjan (Journal article; Tidsskriftartikkel; Peer reviewed, 2020-06-09)
      Dissemination of bacterial clones carrying plasmid-mediated resistance genes is a major factor contributing to the increasing prevalence of antibiotic resistance. Understanding the evolution of successful clones and the association to mobile resistance elements are therefore crucial. In this study, we determined the sequence of a 145 kb IncC multi-drug resistance plasmid (pK71-77-1-NDM), harbouring ...