Now showing items 1324-1343 of 10152

    • Characterization and Cytotoxicity Studies of the Rare 21:4 n-7 Acid and Other Polyunsaturated Fatty Acids from the Marine Opisthobranch Scaphander lignarius, Isolated Using Bioassay Guided Fractionation 

      Vasskog, Terje; Andersen, Jeanette hammer; Hansen, Espen; Svenson, Johan (Journal article; Tidsskriftartikkel; Peer reviewed, 2012)
      The marine opisthobranch Scaphander lignarius has been analyzed in the systematic search for novel bioactive compounds in Arctic marine organisms using bioassay guided fractionation. A number of highly cytotoxic fractions were shown to contain mainly polyunsaturated fatty acids (PUFAs). Selected PUFAs were isolated and identified using both liquid chromatography-mass spectrometry (LC-MS) and nuclear ...
    • Characterization and Fitness Cost of Tn7100, a Novel Integrative and Conjugative Element Conferring Multidrug Resistance in Haemophilus influenzae 

      Johannessen, Helene; Anthonisen, Inger Lill; Zecic, Nermin; Hegstad, Kristin; Ranheim, Trond Egil; Skaare, Dagfinn (Journal article; Tidsskriftartikkel, 2022-07-22)
      A multidrug-resistant (MDR) strain of Haemophilus influenzae, Hi-228, with phenotypic resistance toward ampicillin, cefotaxime, chloramphenicol, gentamicin, and azithromycin, was isolated in Oslo, Norway. The strain was part of a clonal outbreak (2016–2017) comprising five ST143 strains with identical resistotypes. Hi-228 carries a novel integrative and conjugative element (ICE), Tn7100, contributing ...
    • Characterization and pro-inflammatory responses of spore and hyphae samples from various mold species 

      Øya, Elisabeth; Afanou, Komlavi Anani; Malla, Nabin; Uhlig, Silvio; Rolen, Elin; Skaar, Ida; Straumfors, Anne; Winberg, Jan-Olof; Bang, Berit; Schwarze, Per E; Eduard, Wijnand; Holme, Jørn Andreas (Journal article; Tidsskriftartikkel; Manuskript; Peer reviewed; Preprint, 2017-09-18)
      Mold particles from <i>Aspergillus fumigatus, Penicillium chrysogenum, Aspergillus versicolor</i>, and <i>Stachybotrys chartarum</i> have been linked to respiratory‐related diseases. We characterized X‐ray‐inactivated spores and hyphae fragments from these species by number of particles, morphology, and mycotoxin, β‐glucan and protease content/activity. The pro‐inflammatory properties of mold particles ...
    • Characterization of a novel class of mutation (Short Patch Illegitimate Recombination) in Acinetobacter baylyi 

      Lunnan, Asbjørn (Master thesis; Mastergradsoppgave, 2013-05-20)
      In prokaryotes, genetic variability contributes to the adaptation to novel environmental conditions, to resistance against threats such as antimicrobial agents and viruses, and ultimately to bacterial evolution through selection and drift. Genetic variability is mainly generated through mutations, e.g. point mutations, deletions, insertions, inversions, and duplications/amplifications. In addition, ...
    • Characterization of ATG8 Family Protein Binding to TRIM23 and TRIM31 

      Isaksen, Heidi (Master thesis; Mastergradsoppgave, 2018-05-15)
      Macroautophagy (hereafter called autophagy) is a process where proteins, organelles and intracellular micro-organisms are degraded by the lysosome. The autophagosome engulfs a part of the cytoplasm where the cargo is, and transports it to the endosomal-lysosomal system for degradation. Autophagy can also be selective, where cargos are recognized directly by the autophagy receptors or by other proteins ...
    • Characterization of BRCA1 and BRCA2 variants found in a Norwegian breast or ovarian cancer cohort 

      Jarhelle, Elisabeth; Stensland, Hilde Monica Frostad Riise; Mæhle, Lovise Olaug; Van Ghelue, Marijke (Journal article; Tidsskriftartikkel; Peer reviewed, 2016-08-05)
      Germline mutations in BRCA1 and BRCA2 cause hereditary breast and ovarian cancer. Molecular screening of these two genes in patients with a family history of breast or ovarian cancer has revealed pathogenic variants as well as genetic variants of unknown significance (VUS). These VUS may cause a challenge in the genetic counseling process regarding clinical management of the patient and the family. ...
    • Characterization of commensal enterococcal membrane vesicles and their cytotoxic effect on various host cells 

      Bhandari, Ishan (Mastergradsoppgave; Master thesis, 2020-05-14)
      Enterococcus are a group of bacteria growing on different environmental condition behaving as a commensal as well as opportunistic pathogen. Among the enterococci, Enterococcus faecium is recently emerged as a nosocomial multi-resistance pathogen especially in the severely ill and immunocompromised patients causing a wide range of diseases like endocarditis, bacteraemia and urinary tract infections. ...
    • Characterization of competition between commensal A2 and clinical A1 strains of Enterococcus faecium 

      Fenzel, Carolin Kornelia (Mastergradsoppgave; Master thesis, 2023-05-14)
      Enterococcus faecium (E. faecium) emerged from a gut commensal to one of the leading nosocomial multidrug-resistant pathogens. The species of E. faecium, has a deep phylogenetic split into commensal and clinical strains. The dominance of clinical strains during nosocomial infections is only insufficiently understood. Previous studies revealed competitive characteristics between the commensal ...
    • Characterization of competition between commensal and clinical strains of Enterococcus faecium 

      Engi, Daniel (Master thesis; Mastergradsoppgave, 2021-06-01)
      Invasive infection by multidrug-resistant Enterococcus faecium is increasingly becoming a healthcare concern. Few studies have addressed whether and how clinical E. faecium strains are able to outcompete commensal strains. This thesis aimed to characterize the in vitro competition between commensal and clinical E. faecium strains with respect to growth inhibition exerted by bacteriocins produced by ...
    • Characterization of extracellular polymeric matrix, and treatment of Fusobacterium nucleatum and Porphyromonas gingivalis biofilms with DNase I and proteinase K 

      Mohammed, Marwan; Nerland, Audun Helge; Al-Haroni, Mohammed; Bakken, Vidar (Journal article; Tidsskriftartikkel; Peer reviewed, 2013)
      Background: Biofilms are organized communities of microorganisms embedded in a self-produced extracellular polymeric matrix (EPM), often with great phylogenetic variety. Bacteria in the subgingival biofilm are key factors that cause periodontal diseases; among these are the Gram-negative bacteria Fusobacterium nucleatum and Porphyromonas gingivalis. The objectives of this study were to characterize ...
    • Characterization of gut microbiota composition and functions in patients with chronic alcohol overconsumption 

      Bjørkhaug, Steinar Traae; Aanes, Håvard; Neupane, Sudan Prasad; Bramness, Jørgen Gustav; Malvik, Stine; Henriksen, Christine; Skar, Viggo Øystein; Medhus, Asle Wilhelm; Valeur, Jørgen (Journal article; Tidsskriftartikkel; Peer reviewed, 2019-03-20)
      Excessive alcohol intake can alter the gut microbiota, which may underlie the pathophysiology of alcohol-related diseases. We examined gut microbiota composition and functions in patients with alcohol overconsumption for >10 years, compared to a control group of patients with a history of no or low alcohol intake. Faecal microbiota composition was assessed by 16S rRNA sequencing. Gut microbiota ...
    • Characterization of heavy users of skin care products among Norwegian women from 2003 to 2011 

      Aniansson, Boel Maria; Veierød, Marit Bragelien; Rylander, Charlotta; Lund, Eiliv; Sandanger, Torkjel M (Journal article; Tidsskriftartikkel; Peer reviewed, 2016-12-16)
      Background: Several ingredients in personal care products (PCPs) have been classified as endocrine disruptors (EDs) and concern has been raised whether use of PCPs can affect human health. We aimed to characterize Norwegian female users of skin care products and compare life style characteristics between heavy users and non-users. <p>Methods: This cross-sectional study consisted of 114 202 women ...
    • Characterization of inhibition by vardenafil analogues of ATP-dependent transport of cGMP by the ABCC5 transporter. 

      Kuresh, Farzane (Master thesis; Mastergradsoppgave, 2015-05-27)
      Background: Clinical studies have reported overexpression of PDE5 and elevation of intracellular cyclic GMP in various types of cancer cells. ABCC5 transports intracellular cGMP out of the cells with high affinity, while PDE5 inhibitors prevent high affinity cGMP efflux by inhibiting ABCC5. Increasing intracellular cGMP levels through inhibition of PDE5 and PDE5 export activity is hypothesized ...
    • Characterization of Liposomes Using Quantitative Phase Microscopy (QPM) 

      Cauzzo, Jennifer; Jayakumar, Nikhil; Ahluwalia, Balpreet Singh; Ahmad, Azeem; Skalko-Basnet, Natasa (Journal article; Tidsskriftartikkel; Peer reviewed, 2021-04-21)
      The rapid development of nanomedicine and drug delivery systems calls for new and effective characterization techniques that can accurately characterize both the properties and the behavior of nanosystems. Standard methods such as dynamic light scattering (DLS) and fluorescent-based assays present challenges in terms of system’s instability, machine sensitivity, and loss of tracking ability, among ...
    • Characterization of mitochondrial mRNAs in codfish reveals unique features compared to mammals 

      Coucheron, Dag-Hugo; Nymark, Marianne; Breines, Ragna; Karlsen, Bård Ove; Andreassen, morten; Jørgensen, Tor Erik; Moum, Truls; Johansen, Steinar Daae (Journal article; Tidsskriftartikkel; Peer reviewed, 2011)
      Expression and processing of mitochondrial gene transcripts are fundamental to mitochondrial function, but information from early vertebrates like teleost fishes is essentially lacking. We have analyzed mitogenome sequences of ten codfishes (family Gadidae), and provide complete sequences from three new species (Saithe, Pollack and Blue whiting). Characterization of the mitochondrial mRNAs in Saithe ...
    • Characterization of Norwegian women eating wholegrain bread 

      Bakken, Toril; Braaten, Tonje; Olsen, Anja; Lund, Eiliv; Skeie, Guri (Journal article; Tidsskriftartikkel; Peer reviewed, 2015-02-25)
      To investigate dietary and non-dietary characteristics of wholegrain bread eaters in the Norwegian Women and Cancer study.<br>Cross-sectional study using an FFQ.<br>Women were divided into two groups according to wholegrain bread consumption.<br>Adult women (n 69 471).<br>Median daily consumption of standardized slices of wholegrain bread was 2·5 in the low intake group and 4·5 in the high intake ...
    • Characterization of novel precursor miRNAs using next generation sequencing and prediction of miRNA targets in Atlantic halibut 

      Bizuayehu, Teshome; Fernandes, Jorge; Johansen, Steinar Daae; Babiak, Igor (Journal article; Tidsskriftartikkel; Peer reviewed, 2013)
      microRNAs (miRNAs) are implicated in regulation of many cellular processes. miRNAs are processed to their mature functional form in a step-wise manner by multiple proteins and cofactors in the nucleus and cytoplasm. Many miRNAs are conserved across vertebrates. Mature miRNAs have recently been characterized in Atlantic halibut (Hippoglossus hippoglossus L.). The aim of this study was to identify and ...
    • Characterization of the Arabidopsis thaliana homologue of NBR1 

      Svenning, Steingrim (Master thesis; Mastergradsoppgave, 2009-05-15)
      It is now well established that p62 and NBR1 are selectively degraded by autophagy and can act as cargo receptors or adaptors for the autophagic degradation of ubiquitinated substrates. Research on autophagy in plants is also well under way, but the mechanism by which target substrates are sequestered for autophagic degradation has not been elucidated. The uncharacterized plant protein Q9SB64 shares ...
    • Characterization of the cell secretomes from undifferentiated and chondro-induced stem cells 

      Yonas Hambissa, Jerusalem (Master thesis; Mastergradsoppgave, 2015-05-20)
      Background: Articular cartilage is an essential part of the skeletal system. It provides a frictionless surface for smooth pain-free articulation and limits the load applied to subchondral bone during joint movement. Articular cartilage is an avascular and aneural tissue without lymphatic vessels. Due to this unique nature, articular cartilage has poor self-repair capacity. Therefore, minor cartilage ...
    • Characterization of the degree of food processing in the European Prospective Investigation into Cancer and Nutrition: Application of the Nova classification and validation using selected biomarkers of food processing 

      Huybrechts, Inge; Rauber, Fernanda; Nicolas, Geneviève; Casagrande, Corinne; Kliemann, Nathalie; Wedekind, Roland; Biessy, Carine; Scalbert, Augustin; Touvier, Mathilde; Aleksandrova, Krasimira; Jakszyn, Paula; Skeie, Guri; Bajracharya, Rashmita; Boer, Jolanda M. A.; Borné, Yan; Chajes, Veronique; Dahm, Christina C.; Dansero, Lucia; Guevara, Marcela; Heath, Alicia K.; Ibsen, Daniel B.; Papier, Keren; Katzke, Verena; Kyrø, Cecilie; Masala, Giovanna; Molina-Montes, Esther; Robinson, Oliver J. K.; Santiuste de Pablos, Carmen; Schulze, Matthias B.; Simeon, Vittorio; Sonestedt, Emily; Tjønneland, Anne; Tumino, Rosario; van der Schouw, Yvonne T.; Verschuren, W. M. Monique; Vozar, Beatrice; Winkvist, Anna; Gunter, Marc J.; Monteiro, Carlos A.; Millett, Christopher; Levy, Renata Bertazzi (Journal article; Tidsskriftartikkel; Peer reviewed, 2022-12-16)
      Background: Epidemiological studies have demonstrated an association between the degree of food processing in our diet and the risk of various chronic diseases. Much of this evidence is based on the international Nova classification system, which classifies food into four groups based on the type of processing: (1) Unprocessed and minimally processed foods, (2) Processed culinary ingredients, ...