Now showing items 221-240 of 358

    • Using chemical reaction kinetics to predict optimal antibiotic treatment strategies 

      Abel zur Wiesch, Pia; Clarelli, Fabrizio; Cohen, Ted (Journal article; Tidsskriftartikkel; Peer reviewed, 2017-01-06)
      Identifying optimal dosing of antibiotics has proven challenging—some antibiotics are most effective when they are administered periodically at high doses, while others work best when minimizing concentration fluctuations. Mechanistic explanations for why antibiotics differ in their optimal dosing are lacking, limiting our ability to predict optimal therapy and leading to long and costly experiments. ...
    • Bacillus anthracis gamma phage lysis among soil bacteria: An update on test specificity 

      Kolton, Cari B; Podnecky, Nicole L.; Shadomy, Sean V; Gee, Jay E; Hoffmaster, Alex R (Journal article; Tidsskriftartikkel; Peer reviewed, 2017-11-16)
      Background: <br> Bacillus anthracis, which causes anthrax in humans and animals, is enzootic in parts of the U.S. state of Texas where cases are typically reported in animals annually. The gamma phage lysis assay is a common diagnostic method for identifcation of B. anthracis and is based on the bacterium’s susceptibility to lysis. This test has been shown to be 97% specifc for B. anthracis, as ...
    • Low dose naltrexone in multiple sclerosis: Effects on medication use. A quasi-experimental study 

      Raknes, Guttorm; Småbrekke, Lars (Journal article; Tidsskriftartikkel; Peer reviewed, 2017-11-03)
      Low dose naltrexone (LDN) has become a popular off-label therapy for multiple sclerosis (MS). A few small, randomized studies indicate that LDN may have beneficial effects in MS and other autoimmune diseases. If proven efficacious, it would be a cheap and safe alternative to the expensive treatments currently recommended for MS. We investigated whether a sudden increase in LDN use in Norway in 2013 ...
    • Ceramide-containing liposomes with doxorubicin: time and cell-dependent effect of C6 and C12 ceramide 

      Øverbye, Anders; Holsæter, Ann Mari; Fusser, Markus; Skalko-Basnet, Natasa; Iversen, Tore Geir; Torgersen, Maria Lyngaas; Sønstevold, Tonje; Engebråten, Olav; Flatmark, Kjersti; Mælandsmo, Gunhild; Skotland, Tore; Sandvig, Kirsten (Journal article; Tidsskriftartikkel; Peer reviewed, 2017-08-12)
      Doxorubicin, a widely used chemotherapeutic drug, has several potential high- risk side effects including cardiomyopathy. Furthermore, cellular resistance to this drug develops with time. By using liposomes as carrier vesicles both the side effects and drug resistance might be avoided. In this study we have investigated the cytotoxic effect of doxorubicin encapsulated in liposomes with and ...
    • Impact of extensive antibiotic treatment on faecal carriage of antibiotic-resistant enterobacteria in children in a low resistance prevalence setting 

      Knudsen, Per Kristian; Brandtzæg, Petter; Høiby, Ernst Arne; Bohlin, Jon; Samuelsen, Ørjan; Steinbakk, Martin; Abrahamsen, Tore G; Müller, Fredrik; Gammelsrud, Karianne Wiger (Journal article; Tidsskriftartikkel; Peer reviewed, 2017-11-07)
      We prospectively studied the consequences of extensive antibiotic treatment on faecal carriage of antibiotic-resistant enterobacteria in a cohort of children with cystic fibrosis (CF) and a cohort of children with cancer compared to healthy children with no or low antibiotic exposure. The study was conducted in Norway in a low resistance prevalence setting. Sixty longitudinally collected faecal ...
    • What do Australian consumers, pharmacists and prescribers think about documenting indications on prescriptions and dispensed medicines labels?: A qualitative study 

      Garada, Mona; McLachlan, Andrew J; Schiff, Gordon D; Lehnbom, Elin (Journal article; Tidsskriftartikkel; Peer reviewed, 2017-11-15)
      Background: Documenting the indication on prescriptions and dispensed medicines labels is not standard practice in Australia. However, previous studies that have focused on the content and design of dispensed medicines labels, have suggested including the indication as a safety measure. The aim of this study was to investigate the perspectives of Australian consumers, pharmacists and prescribers ...
    • Direct and indirect risk associated with the use of dietary supplements among persons with dementia in a Norwegian memory clinic 

      Risvoll, Hilde; Giverhaug, Trude; Halvorsen, Kjell H.; Waaseth, Marit; Musial, Frauke (Journal article; Tidsskriftartikkel; Peer reviewed, 2017-05-12)
      Background: The use of dietary supplements (DS) is common among persons with dementia. Direct risks associated with DS use include adverse events and DS-drug interactions. A direct risk is a risk caused by the treatment itself. Indirect risks are related to the treatment setting, such as the conditions of use, and not to the treatment itself. Because dementia symptoms may reduce a person’s ability ...
    • Spatial and temporal changes in the Barents Sea pelagic compartment during the recent warming 

      Eriksen, Elena; Skjoldal, Hein Rune; Gjøsæter, Harald; Primicerio, Raul (Journal article; Tidsskriftartikkel; Peer reviewed, 2017-01-11)
      The Barents Sea has experienced substantial warming over the last few decades with expansion of relatively warm Atlantic water and reduction in sea ice. Based on a review of relevant literature and additional analyses, we report changes in the pelagic compartment associated with this warming using data from autumn surveys (acoustic capelin, 0-group fish, and ecosystem surveys). We estimated ...
    • Perception of the Professional Knowledge of and Education on the Medical Technology Products among the Pharmacists in the Baltic and Nordic Countries—A Cross-Sectional Exploratory Study 

      Volmer, Daisy; Sokirskaja, Aleksandra; Laaksonen, Raisa; Vainio, Kirsti; Sandler, Niklas; Halvorsen, Kjell H.; Kjome, Reidun Lisbet Skeide; Gizurarson, Sveinbjørn; Muceniece, Ruta; Maurina, Baiba; Dauksiene, Jurgita; Ruuben, Lilian; Björnsdottir, Ingunn; Ratassepp, Tagne; Heinämäki, Jyrki (Journal article; Tidsskriftartikkel; Peer reviewed, 2016-10-13)
      With increased development of medical technology (MT), new challenges emerge related to education and training of pharmacists and other healthcare specialists. Currently, only a few universities in the EU promote MT education and research. Objectives: The aim of this study was to evaluate the current status, views on, and need for the education on MT for the pharmacy students and practicing ...
    • 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 ...
    • Methyl propiolate and 3-butynone: starting points for synthesis of amphiphilic 1,2,3-triazole peptidomimetics for antimicrobial evaluation 

      Bakka, Thomas Aleksander; Strøm, Morten B.; Andersen, Jeanette Hammer; Gautun, Odd Reidar (Journal article; Tidsskriftartikkel; Peer reviewed, 2017-07-29)
      A library of 29 small 1,4-substituted 1,2,3-triazoles was prepared for studies of antimicrobial activity. The pharmacophore model investigated with these substrates was based on small peptidomimetics of antimicrobial peptides and antimicrobials isolated from marine organisms from sub-arctic regions. Using methyl 1,2,3-triazole-carboxylates and 1,2,3-triazole methyl ketones prepared through “click” ...
    • LIMT is a novel metastasis inhibiting lncRNA suppressed by EGF and downregulated in aggressive breast cancer 

      Sas-Chen, Aldema; Aure, Miriam Ragle; Leibovich, Limor; Carvalho, Silvia; Enuka, Yehoshua; Körner, Cindy; Polycarpou-Schwarz, Maria; Lavi, Sara; Nevo, Nava; Kuznetsov, Yuri; Yuan, Justin; Azuaje, Francisco; Ulitsky, Igor; Diederichs, Sven; Wiemann, Stefan; Yakhini, Zohar; Kristensen, Vessela N.; Børresen-Dale, Anne-Lise; Yarden, Yosef; Sauer, Torill; Geisler, Jürgen; Hofvind, Solveig; Bathen, Tone Frost; Borgen, Elin; Engebråten, Olav; Fodstad, Øystein; Garred, Øystein; Geitvik, Gry; Kåresen, Rolf; Naume, Bjørn; Mælandsmo, Gunhild; Russnes, Hege Elisabeth Giercksky; Schlichting, Ellen; Sørlie, Therese; Lingjærde, Ole Christian; Sahlberg, Kristine Kleivi; Skjerven, Helle; Fritzman, Britt (Journal article; Tidsskriftartikkel; Peer reviewed, 2016-09-01)
      Long noncoding RNAs (lncRNAs) are emerging as regulators of gene expression in pathogenesis, including cancer. Recently, lncRNAs have been implicated in progression of specific subtypes of breast cancer. One aggressive, basal-like subtype associates with increased EGFR signaling, while another, the HER2-enriched subtype, engages a kin of EGFR Based on the premise that EGFR-regulated lncRNAs might ...
    • In plastico: laboratory material newness affects growth and reproduction of Daphnia magna reared in 50-ml polypropylene tubes 

      Cuhra, Marek; Bøhn, Thomas; Cuhra, Petr (Journal article; Tidsskriftartikkel; Peer reviewed, 2017-04-20)
      Plastic laboratory materials are found to affect vital parameters of the waterflea Daphnia magna. The main responsible factor is defined as “newness” of the materials. Juvenile D. magna were raised individually in; a) new laboratory-standard 50 ml polypropylene tubes, and; b) identical tubes which had been washed and aerated for several weeks. Newness had significant effects on growth and fecundity ...
    • Costs and benefits of natural transformation in Acinetobacter baylyi 

      Hülter, Nils Fredrik; Sørum, Vidar; Borch-Pedersen, Kristina; Liljegren, Mikkel Meyn; Utnes, Ane; Primicerio, Raul; Harms, Klaus; Johnsen, Pål Jarle (Journal article; Tidsskriftartikkel; Peer reviewed, 2017-02-15)
      Background <br> Natural transformation enables acquisition of adaptive traits and drives genome evolution in prokaryotes. Yet, the selective forces responsible for the evolution and maintenance of natural transformation remain elusive since taken-up DNA has also been hypothesized to provide benefits such as nutrients or templates for DNA repair to individual cells. <br> Results <br> We investigated ...
    • Interplay of choline metabolites and genes in patient-derived breast cancer xenografts 

      Grinde, Maria Tunset; Skrbo, Nirma; Moestue, Siver Andreas; Rødland, Einar Andreas; Borgan, Eldrid; Kristian, Alexandr; Sitter, Beathe; Bathen, Tone; Børresen-Dale, Anne-Lise; Mælandsmo, Gunhild; Sørlie, Therese; Marangoni, Elisabetta; Gribbestad, Ingrid S (Journal article; Tidsskriftartikkel; Peer reviewed, 2014-01-21)
      Introduction: Dysregulated choline metabolism is a well-known feature of breast cancer, but the underlying mechanisms are not fully understood. In this study, the metabolomic and transcriptomic characteristics of a large panel of human breast cancer xenograft models were mapped, with focus on choline metabolism. <br> Methods: Tumor specimens from 34 patient-derived xenograft models were collected ...
    • Successful co-encapsulation of benzoyl peroxide and chloramphenicol in liposomes by a novel manufacturing method - dual asymmetric centrifugation 

      Ingebrigtsen, Sveinung Gaarden; Skalko-Basnet, Natasa; Cavalcanti Jacobsen, Cristiane de Albuquerque; Holsæter, Ann Mari (Journal article; Tidsskriftartikkel; Peer reviewed, 2017-11-16)
      Encapsulation of more than one active pharmaceutical ingredient into nanocarriers such as liposomes is an attractive approach to achieve a synergic drug effect and less complicated dosing schedules in multi-drug treatment regimes. Liposomal drug delivery in acne treatment may improve drug efficiency by targeted delivery to pilosebaceous units, reduce adverse effects and improve ...
    • The Potential of Cyclodextrins as Novel Active Pharmaceutical Ingredients: A Short Overview 

      Di Cagno, Massimiliano Pio (Journal article; Tidsskriftartikkel; Peer reviewed, 2016-12-25)
      Cyclodextrins (CDs) are cyclic oligosaccharides of natural origin that were discovered more than 100 years ago. The peculiar cone-like conformation of the sugar ring, expressing a lipophilic cavity and a hydrophilic external surface, allows these substances to spontaneously complex poorly soluble compounds in an aqueous environment. For more than 50 years, these substances have found applicability ...
    • No effect of natural transformation on the evolution of resistance to bacteriophages in the Acinetobacter baylyi model system. 

      Mcleman, Amy; Sierocinski, Pawel; Hesse, E; Buckling, A; Perron, G; Hülter, Nils Fredrik; Johnsen, Pål Jarle; Vos, M (Journal article; Tidsskriftartikkel; Peer reviewed, 2016)
      The adaptive benefits of natural transformation, the active uptake of free DNA molecules from the environment followed by incorporation of this DNA into the genome, may be the improved response to selection resulting from increased genetic variation. Drawing analogies with sexual reproduction, transformation may be particularly beneficial when selection rapidly fluctuates during coevolution with ...
    • The Role of Adherence and Retreatment in De Novo Emergence of MDR-TB 

      Cadosch, Dominique; Abel zur Wiesch, Pia; Kouyos, Roger; Bonhoeffer, Sebastian (Journal article; Tidsskriftartikkel; Peer reviewed, 2016)
      Treatment failure after therapy of pulmonary tuberculosis (TB) infections is an important challenge, especially when it coincides with de novo emergence of multi-drug-resistant TB (MDR-TB). We seek to explore possible causes why MDR-TB has been found to occur much more often in patients with a history of previous treatment. We develop a mathematical model of the replication of Mycobacterium tuberculosis ...
    • The Presumed Polyomavirus Viroporin VP4 of Simian Virus 40 or Human BK Polyomavirus Is Not Required for Viral Progeny Release 

      Henriksen, Stian; Hansen, Terkel; Bruun, Jack-Ansgar; Rinaldo, Christine Hanssen (Journal article; Tidsskriftartikkel; Peer reviewed, 2016-09-14)
      The minor capsid protein of human BK polyomavirus (BKPyV), VP2, and its N-terminally truncated form, VP3, are both important for viral entry. The closely related simian virus 40 (SV40) reportedly produces an additional truncated form of VP2/3, denoted VP4, apparently functioning as a viroporin promoting progeny release. The VP4 open reading frame is conserved in some polyomaviruses, including BKPyV. ...