Now showing items 141-160 of 656

    • Bacterial evolution on demand 

      Johnsen, Pål Jarle; Gama, João Alves; Harms, Klaus (Journal article; Tidsskriftartikkel; Peer reviewed, 2021-04-06)
      Bacteria carry antibiotic resistant genes on movable sections of DNA that allow them to select the relevant genes on demand.
    • Stanozolol-N-glucuronide metabolites in human urine samples as suitable targets in terms of routine anti-doping analysis 

      Göschl, Lorenz; Gmeiner, Günter; Gärtner, Peter; Stadler, Georg; Enev, Valentin; Thevis, Mario; Schänzer, Wilhelm; Guddat, Sven; Forsdahl, Guro (Journal article; Tidsskriftartikkel; Peer reviewed, 2021-06-05)
      The exogenous anabolic-androgenic steroid (AAS) stanozolol stays one of the most detected substances in professional sports. Its detection is a fundamental part of doping analysis, and the analysis of this steroid has been intensively investigated for a long time. This contribution to the detection of stanozolol doping describes for the first time the unambiguous proof for the existence of ...
    • Isolation, structure elucidation and bioactivity profiling of lyso-ornithine lipids from the marine bacterium Lacinutrix sp. 

      Jawad, Jawad (Master thesis; Mastergradsoppgave, 2021-05-11)
      From previous work, it was identified two analytes of interest, produced by Lacinutrix sp. The two analytes are iso-branched lyso-ornithine lipids with only one CH2 group differing between the two compounds, in the hydrocarbon chain (lysoC15:0 and C16:0). The bacterium was isolated from the marine sponge Halicondria sp. that was collected beside Bjørnøya, on a research cruise in 2009. The analytes ...
    • Association between the use of Proton Pump Inhibitors and Histamine-2 Receptor Antagonists and the risk of gastric cancer in Norway 

      Tran, Kenny Khang (Master thesis; Mastergradsoppgave, 2021-05-13)
      Background: The use of proton pump inhibitors (PPIs) on prescription has increased over the last decade in Norway. PPIs are an important medication in the treatment of acid related disorders such as peptic ulcer disease, gastroesophageal reflux disease and Helicobacter Pylori (H. Pylori) infection. However, many previous studies have raised concern about the potential risk of gastric cancer following ...
    • Studie av glukokortikoidreseptoren (GR) og transkripsjonsfaktoren PAX6 i linseceller under oksidativt stress 

      Mellem, Viktoria Sareussen (Mastergradsoppgave; Master thesis, 2021-05-11)
      PAX6 er en transkripsjonsfaktor som er viktig for den normale utviklingen og funksjonen til øyet. Mutasjoner i PAX6 eller langvarig bruk av glukokortikoider er assosiert med patologiske tilstander i øyet, noe som indikerer at begge faktorene er viktig for øyets normalfunksjon. Øyet utsettes for oksidativt stress, og det er tidligere rapportert at både PAX6 og glukokortikoidreseptoren (GR) i andre ...
    • Identifying the drivers of multidrug-resistant Klebsiella pneumoniae at a European level 

      Kachalov, Viacheslav N.; Nguyen, Huyen; Balakrishna, Suraj; Salazar-Vizcaya, Luisa; Sommerstein, Rami; Kuster, Stefan P.; Hauser, Anthony; Abel-Zur Wiesch Genannt Hülsho, Pia Karoline; Klein, E; Kouyos, Roger D. (Journal article; Tidsskriftartikkel; Peer reviewed, 2021-01-29)
      Beta-lactam- and in particular carbapenem-resistant Enterobacteriaceae represent a major public health threat. Despite strong variation of resistance across geographical settings, there is limited understanding of the underlying drivers. To assess these drivers, we developed a transmission model of cephalosporin- and carbapenem-resistant <i>Klebsiella pneumoniae</i>. The model is parameterized using ...
    • Amphipathic Barbiturates as Mimics of Antimicrobial Peptides and the Marine Natural Products Eusynstyelamides with Activity against Multi-resistant Clinical Isolates 

      Paulsen, Marianne Hagensen; Engqvist, Magnus; Ausbacher, Dominik; Anderssen, Trude; Langer, Manuel Karl; Haug, Tor; Morello, Glenn Robert; Liikanen, Laura; Blencke, Hans-Matti; Isaksson, Johan; Juskewitz, Eric; Bayer, Annette; Strøm, Morten B. (Journal article; Tidsskriftartikkel; Peer reviewed, 2021-07-27)
      We report a series of synthetic cationic amphipathic barbiturates inspired by the pharmacophore model of small antimicrobial peptides (AMPs) and the marine antimicrobials eusynstyelamides. These N,N′-dialkylated-5,5-disubstituted barbiturates consist of an achiral barbiturate scaffold with two cationic groups and two lipophilic side chains. Minimum inhibitory concentrations of 2–8 μg/mL were achieved ...
    • Liposomes-in-chitosan hydrogel boosts potential of chlorhexidine in biofilm eradication in vitro 

      Hemmingsen, Lisa Myrseth; Giordani, Barbara; Pettersen, Ann Kristin; Vitali, Beatrice; Basnet, Purusotam; Skalko-Basnet, Natasa (Journal article; Tidsskriftartikkel; Peer reviewed, 2021-03-16)
      Successful treatment of skin infections requires eradication of biofilms found in up to 90 % of all chronic wounds, causing delayed healing and increased morbidity. We hypothesized that chitosan hydrogel boosts the activity of liposomally-associated membrane active antimicrobials (MAA) and could potentially improve bacterial and biofilm eradication. Therefore, liposomes (∼300 nm) bearing chlorhexidine ...
    • Chitosomes-In-Chitosan Hydrogel for Acute Skin Injuries: Prevention and Infection Control 

      Hemmingsen, Lisa Myrseth; Julin, Kjersti; Ahsan, Luqman; Basnet, Purusotam; Johannessen, Mona; Skalko-Basnet, Natasa (Journal article; Tidsskriftartikkel; Peer reviewed, 2021-05-12)
      Burns and other skin injuries are growing concerns as well as challenges in an era of antimicrobial resistance. Novel treatment options to improve the prevention and eradication of infectious skin biofilm-producing pathogens, while enhancing wound healing, are urgently needed for the timely treatment of infection-prone injuries. Treatment of acute skin injuries requires tailoring of formulation to ...
    • Self-reported medication use among coronary heart disease patients showed high validity compared with dispensing data 

      Pedersen, Elisabeth; Truong, Kieu Nhi Lise; Garcia, Beate Hennie; Halvorsen, Kjell H.; Svendsen, Kristian; Eggen, Anne Elise; Waaseth, Marit (Journal article; Tidsskriftartikkel; Peer reviewed, 2021-02-24)
      <i>Objective</i> - To validate self-reported use of medications for secondary prevention of coronary heart disease (CHD) in a population-based health study by comparing self-report with pharmacy dispensing data, and explore different methods for defining medication use in prescription databases.<br><br> <i>Study design and setting</i> - Self-reported medication use among participants with CHD ...
    • Piggybacking on Niche Adaptation Improves the Maintenance of Multidrug-Resistance Plasmids 

      Kloos, Julia Maria; Gama, João Alves; Hegstad, Joachim; Samuelsen, Ørjan; Johnsen, Pål Jarle (Journal article; Tidsskriftartikkel; Peer reviewed, 2021-03-24)
      The persistence of plasmids in bacterial populations represents a puzzling evolutionary problem with serious clinical implications due to their role in the ongoing antibiotic resistance crisis. Recently, major advancements have been made toward resolving this “plasmid paradox” but mainly in a nonclinical context. Here, we propose an additional explanation for the maintenance of multidrug‐resistance ...
    • 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 ...
    • Adherence to prescription guidelines and achievement of treatment goals among persons with coronary heart disease in Tromsø 7 

      Pedersen, Elisabeth; Garcia, Beate Hennie; Halvorsen, Kjell H.; Eggen, Anne Elise; Schirmer, Henrik; Waaseth, Marit (Journal article; Tidsskriftartikkel; Peer reviewed, 2021-01-21)
      Background - Adherence to clinical practice guidelines for coronary heart disease (CHD) reduces morbidity, mortality and treatment costs. We aimed to describe and compare adherence to prescription guidelines for persons with CHD, and explore its association with treatment goal achievement.<p> <p>Method - We included all participants reporting myocardial infarction, angina, percutaneous coronary ...
    • Time distribution for pharmacists conducting a randomized controlled trial — An observational time and motion study. 

      Havnes, Kjerstin; Lehnbom, Elin; Walter, Scott R.; Garcia, Beate; Halvorsen, Kjell H. (Journal article; Tidsskriftartikkel; Peer reviewed, 2021-04-30)
      Introduction - An expected future increase in older adults will demand changes in health care delivery, making development, implementation and evaluation of new health care models essential. The rationale for political decision-making concerning the implementation and application of interventions in health care should include cost estimations, specifically those involving clinical interventions. To ...
    • 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 ...
    • Clinical Lipidomics: Effects of Vitamin D in Human Adipose Tissue 

      Chan, Sze Mang Sammy (Master thesis; Mastergradsoppgave, 2021-05-10)
      Vitamin D is vital for calcium homeostasis and skeletal health, has immunomodulatory effects and is involved in the regulation of differentiation and proliferation of many different cell types. Adipose tissue is an important metabolic organ and a major organ for vitamin D storage. Though, the role of vitamin D and its function in adipose tissue is not fully explored. This thesis applies a solvent ...
    • Molecular modelling of interactions between antipsychotic drugs and receptors mediating antipsychotic effects and important side effects 

      Issifou, Halimatu Sadia T. (Master thesis; Mastergradsoppgave, 2021-05-10)
      Dopamine and serotonin are two neurotransmitters that exert their actions through mediation of dopaminergic and serotonergic receptors respectively. The receptors in focus in the current study, are the dopamine D2 and serotonin 5-HT2A receptors. Common for both receptors is that they are class A G-protein-coupled receptors consisting of seven transmembrane helices embedded in the lipid membrane of ...
    • Current challenges and future perspectives in oral absorption research: An opinion of the UNGAP network 

      Vinarov, Zahari; Abrahamsson, Bertil; Artursson, Per; Batchelor, Hannah; Berben, Philippe; Bernkop-Schnürch, Andreas; Butler, James; Ceulemans, Jens; Davies, Nigel; Dupont, Didier; Flaten, Gøril Eide; Fotaki, Nikoletta; Griffin, Brendan T.; Jannin, Vincent; Keemink, Janneke; Kesisoglou, Filippos; Koziolek, Mirko; Kuentz, Martin; Mackie, Alan R.; Meléndez-Martínez, Antonio J.; McAllister, Mark; Müllertz, Anette; O'Driscoll, Caitriona M.; Parrott, Neil; Paszkowska, Jadwiga; Pavek, Petr; Porter, Christopher J.H.; Reppas, Christos; Stillhart, Cordula; Sugano, Kiyohiko; Toader, Elena; Valentová, Kateřina; Vertzoni, Maria; De Wildt, Saskia N.; Wilson, Clive G.; Augustijns, Patrick (Journal article; Tidsskriftartikkel; Peer reviewed, 2021-02-18)
      Although oral drug delivery is the preferred administration route and has been used for centuries, modern drug discovery and development pipelines challenge conventional formulation approaches and highlight the insufficient mechanistic understanding of processes critical to oral drug absorption. This review presents the opinion of UNGAP scientists on four key themes across the oral absorption ...
    • Network Analysis: an approach to the study of drug-drug relations. Co-medication in Norwegian elderly and severe drug-drug interactions as examples 

      Askar, Mohsen (Master thesis; Mastergradsoppgave, 2019-05-15)
      Network analysis (NA) has been used for studying many social aspects. Employing of network analysis as an approach in the field of public health, to study the relations between patients or health workers and their potential effects in many medical perspectives, took a good share of researchers’ efforts as well. Few attempts have been conducted to use network analysis to study drug-drug relations ...
    • Collateral sensitivity in clinical mecillinam resistant isolates of Escherichia coli 

      Nguyen, Tammy Tam Hoai Thi (Master thesis; Mastergradsoppgave, 2016-05-13)
      Background The rapid increase in antimicrobial resistance (AMR) has become a major threat to the successful management of infectious diseases. To counteract this global threat, development of novel treatment strategies is essential. A promising strategy may be exploiting collateral sensitivity; a phenomenon that occurs when a microorganism that has developed resistance to one antimicrobial agent, ...