• 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 ...
    • Challenges and Best Practices in Ethical Review of Human and Organizational Factors Studies in Health Technology: a Synthesis of Testimonies 

      Peute, Linda W.; Lichtner, Valentina; Baysari, Melissa T.; Hägglund, Maria; Homco, Juell; Jansen-Kosterink, Stephanie; Jauregui, Ignacio; Kaipio, Johanna; Kuziemsky, Craig E.; Lehnbom, Elin; Leite, Francisca; Lesselroth, Blake; Luna, Daniel; Otero, Carlos; Pedersen, Rune; Pelayo, Sylvia; Santos, Raquel; Silva, Nuno-André; Tyllinen, Mari; Van Velsen, Lex; Zheng, Wu Yi; Jaspers, Monique; Marcilly, Romaric (Journal article; Tidsskriftartikkel; Peer reviewed, 2020-04-17)
      <i>Objective</i>: Human and Organizational Factors (HOF) studies in health technology involve human beings and thus require Institutional Review Board (IRB) approval. Yet HOF studies have specific constraints and methods that may not fit standard regulations and IRB practices. Gaining IRB approval may pose difficulties for HOF researchers. This paper aims to provide a first overview of HOF study ...
    • Changes in the consumption of antiepileptics and psychotropic medicines after starting low dose naltrexone: A nation-wide register-based controlled before-after study 

      Raknes, Guttorm; Småbrekke, Lars (Journal article; Tidsskriftartikkel; Peer reviewed, 2019-10-21)
      In this controlled before-after study based on data from the Norwegian Prescription Database, we examine whether starting off-label use of Low Dose Naltrexone (LDN) is followed by changes in the consumption of psychotropic medicines including antiepileptics. Patients that collected LDN for the first time in 2013 (N = 11247) were included and stratified into three groups based on LDN exposure. We ...
    • Chapter 11 - Hydrogels as intrinsic antimicrobials 

      Vanić, Željka; Skalko-Basnet, Natasa (Chapter; Bokkapittel, 2019-10-25)
      Hydrogels are currently applied as the vehicles for drugs or active substances, rather than the active contributors to therapeutic activities. With increasing challenges related to antimicrobial resistance against many antibiotics, natural origin hydrogels have become attractive as more than just vehicles. Although many natural polymers exhibit intrinsic antimicrobial properties, these properties ...
    • 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 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 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 ...
    • The chemotherapeutic drug methotrexate selects for antibiotic resistance 

      Gudmundsdottir, Jonina; Fredheim, Elizabeth G. Aarag; Koumans, Catharina I.M.; Hegstad, Joachim; Tang, Po-Cheng; Andersson, Dan I.; Samuelsen, Ørjan; Johnsen, Pål Jarle (Journal article; Tidsskriftartikkel; Peer reviewed, 2021-12-11)
      Background: Understanding drivers of antibiotic resistance evolution is fundamental for designing optimal treatment strategies and interventions to reduce the spread of antibiotic resistance. Various cytotoxic drugs used in cancer chemotherapy have antibacterial properties, but how bacterial populations are affected by these selective pressures is unknown. Here we test the hypothesis that the widely ...
    • Chitosan in Mucoadhesive Drug Delivery: Focus on Local Vaginal Therapy 

      Andersen, Toril; Bleher, Stefan; Flaten, Gøril Eide; Tho, Ingunn; Mattsson, Sofia; Skalko-Basnet, Natasa (Journal article; Tidsskriftartikkel; Peer reviewed, 2015-01-07)
      Mucoadhesive drug therapy destined for localized drug treatment is gaining increasing importance in today’s drug development. Chitosan, due to its known biodegradability, bioadhesiveness and excellent safety profile offers means to improve mucosal drug therapy. We have used chitosan as mucoadhesive polymer to develop liposomes able to ensure prolonged residence time at vaginal site. Two types of ...
    • Chitosan-based delivery system enhances antimicrobial activity of chlorhexidine 

      Hemmingsen, Lisa Myrseth; Panchai, Pimmat; Julin, Kjersti; Basnet, Purusotam; Nystad, Mona; Johannessen, Mona; Skalko-Basnet, Natasa (Journal article; Tidsskriftartikkel; Peer reviewed, 2022-09-29)
      Infected chronic skin wounds and other skin infections are increasingly putting pressure on the health care providers and patients. The pressure is especially concerning due to the rise of antimicrobial resistance and biofilm-producing bacteria that further impair treatment success. Therefore, innovative strategies for wound healing and bacterial eradication are urgently needed; utilization ...
    • Chitosan-Based Nanomedicine to Fight Genital Candida Infections: Chitosomes 

      Andersen, Toril; Mishchenko, Ekaterina; Flaten, Gøril Eide; Sollid, Johanna U Ericson; Mattsson, Sofia; Tho, Ingunn; Skalko-Basnet, Natasa (Journal article; Tidsskriftartikkel; Peer reviewed, 2017-03-04)
      Vaginal infections are associated with high recurrence, which is often due to a lack of efficient treatment of complex vaginal infections comprised of several types of pathogens, especially fungi and bacteria. Chitosan, a mucoadhesive polymer with known antifungal effect, could offer a great improvement in vaginal therapy; the chitosan-based nanosystem could both provide antifungal effects and ...
    • Chitosan-coated liposomes for topical vaginal therapy: Assuring localized drug effect 

      Jøraholmen, May Wenche; Vanić, Željka; Tho, Ingunn; Škalko-Basnet, Nataša (Journal article; Tidsskriftartikkel; Peer reviewed, 2014)
      The choice of drug therapy in pregnant patients suffering from vaginal infections is limited by the safety profile of the drug. Assuring the efficient topical therapy to avoid systemic absorption is considered the best therapy option. Chitosan-coated liposomes have been developed and optimized to assure localized therapy of clotrimazole. Chitosan was selected as mucoadhesive polymer both to prolong ...
    • 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 ...
    • Chronic Responses of Daphnia magna under Dietary Exposure to Leaves of a Transgenic (Event MON810) Bt-Maize Hybrid and its Conventional Near-Isoline 

      Holderbaum, Daniel Ferreira; Cuhra, Marek; Wickson, Fern; Orth, Afonso Inácio; Nodari, Rubens Onofre; Bøhn, Thomas (Journal article; Tidsskriftartikkel; Peer reviewed, 2015-08-11)
      Insect resistance is the second most common trait globally in cultivated genetically modified (GM) plants. Resistance is usually obtained by introducing into the plant’s genome genes from the bacterium Bacillus thuringiensis (Bt) coding for insecticidal proteins (Cry proteins or toxins) that target insect pests. The aim of this study was to examine the hypothesis that a chronic, high-dose dietary ...
    • Clone- and age-dependent toxicity of a glyphosate commercial formulation and its active ingredient in Daphnia magna. 

      Cuhra, Marek; Traavik, Terje; Bøhn, Thomas (Journal article; Tidsskriftartikkel; Peer reviewed, 2013)
      Low levels of glyphosate based herbicide induced significant negative effects on the aquatic invertebrate Daphnia magna. Glyphosate herbicides such as brands of Roundup, are known to be toxic to daphnids. However, published findings on acute toxicity show significant discrepancies and variation across several orders of magnitude. To test the acute effects of both glyphosate and a commercial ...
    • Co-existence challenges in small-scale farming when farmers share and save seeds 

      Bøhn, Thomas; Aheto, Denis; Mwangala, Felix; Bones, Inger Louise; Simoloka, Christopher; Mbeule, Ireen; Wikmark, Odd Gunnar; Schmidt, Gunther; Chapela, Ignacio (Chapter; Bokkapittel, 2013)
      Gene flow by means of pollen and seeds in maize influences local, regional and global maize biodiversity. Developing countries are centers of diversity for maize and preserve seeds also in informal seed systems. Particularly in poor communities, seed saving and sharing often co-occur with farming on small fields. We present preliminary investigations from a small-scale maize farming community, in ...
    • A co-operative evaluation of different methods of detecting BCR-ABL kinase domain mutations in patients with chronic myeloid leukemia on second-line dasatinib or nilotinib therapy after failure of imatinib 

      Ernst, Thomas; Gruber, Franz; Mikkola, Ingvild; Pelz-Ackermann, Oliver; Maier, J; Pfirrmann, M; Muller, MC; Porkka, Kimmo; Niederwieser, D; Hochhaus, A; Lange, T (Journal article; Tidsskriftartikkel; Peer reviewed, 2009)
    • Co-products from the Atlantic salmon filleting industry – Their properties, stability and potential as human food ingredients 

      Ulleberg, Didrik; Sletten, Ingrid Bøe; Jakobsen, Anita Nordeng; Svenning, Jon Brage; Lerfall, Jørgen (Journal article; Tidsskriftartikkel; Peer reviewed, 2023-03-20)
      The present study impacts the growing knowledge about co-products obtained from the primary processing of Atlantic salmon (Salmo Salar L.) as food ingredients by highlighting their microbial and chemical composition and stability. The proximate composition varied between the co-products from the fatty belly-flap (34% lipid, 15% protein) to the leaner deboned meat (10% fat, 22% protein) (p < 0.001), ...
    • Communication about medication management during patient-physician consultations in primary care: a participant observation study 

      Adelsjö, Igor; Nilsson, Lina; Hellström, Amanda; Ekstedt, Mirjam; Lehnbom, Elin (Journal article; Tidsskriftartikkel; Peer reviewed, 2022-11-03)
      Objective - To explore communication about medication management during annual consultations in primary care. Design: passive participant observations of primary care consultations.<p> <p>Setting - Two primary care centres in southern Sweden.<p> <p>Participants - Consultations between 18 patients (over the age of 60 years) with chronic diseases and 10 general practitioners (GPs) were observed, ...