• 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, ...
    • Comorbidities in an asthma population 8-29 years old: a study from the Norwegian Prescription Database 

      Karlstad, Øystein; Nafstad, Per; Tverdal, Aage; Skurtveit, Svetlana; Furu, Kari (Journal article; Tidsskriftartikkel; Peer reviewed, 2011-09-23)
      Purpose: To examine occurrence of chronic diseases and antimicrobial treatment in an asthma population 8-29 years old, compared to the general population. Methods: In this cross-sectional study, the asthma population was identified from the general population (retrieved from a census covering the entire Norwegian population) by using filled prescriptions on asthma drugs as a proxy measure of ...
    • The competitive edge of an invading specialist 

      Bøhn, Thomas; Amundsen, Per-Arne (Journal article; Tidsskriftartikkel; Peer reviewed, 2001-08-01)
      Introduced species represent major threats to native and natural biodiversity. On the other hand, biologists may increase the understanding of ecological interactions by following communities during establishment of exotic species. Accordingly, feeding ecology and habitat use were studied in native whitefish (<i>Coregonus lavaretus</i>) and recently invading vendace (<i>C. albula</i>) in two lake ...
    • Complete Genome Sequence of Pseudomonas aeruginosa K34-7, a Carbapenem-Resistant Isolate of the High-Risk Sequence Type 233 

      Taiaroa, George; Samuelsen, Ørjan; Kristensen, Tom; Økstad, Ole Andreas; Heikal, Adam (Journal article; Tidsskriftartikkel; Peer reviewed, 2018-08-02)
      Carbapenem-resistant Pseudomonas aeruginosa is defined as a “critical” priority pathogen for the development of new antibiotics. Here we report the complete genome sequence of an extensively drug-resistant, Verona integron-encoded metallo-β-lactamase-expressing isolate belonging to the high-risk sequence type 233.
    • Compositional differences in soybeans on the market: glyphosate accumulates in Roundup Ready GM soybeans 

      Bøhn, Thomas; Cuhra, Marek; Traavik, Terje; Sanden, Monica; Primicerio, Raul (Journal article; Tidsskriftartikkel; Peer reviewed, 2014)
      This article describes the nutrient and elemental composition, including residues of herbicides and pesticides, of 31 soybean batches from Iowa, USA. The soy samples were grouped into three different categories: (i) genetically modified, glyphosate-tolerant soy (GM-soy); (ii) unmodified soy cultivated using a conventional ‘‘chemical’’ cultivation regime; and (iii) unmodified soy cultivated using an ...
    • Conserved collateral antibiotic susceptibility networks in diverse clinical strains of Escherichia coli 

      Podnecky, Nicole L.; Aarag, Elizabeth; Kloos, Julia Maria; Sørum, Vidar; Primicerio, Raul; Roberts, Adam Paul; Rozen, Daniel E.; Samuelsen, Ørjan; Johnsen, Pål Jarle (Journal article; Tidsskriftartikkel; Peer reviewed, 2018-09-10)
      There is urgent need to develop novel treatment strategies to reduce antimicrobial resistance. Collateral sensitivity (CS), where resistance to one antimicrobial increases susceptibility to other drugs, might enable selection against resistance during treatment. However, the success of this approach would depend on the conservation of CS networks across genetically diverse bacterial strains. Here, ...
    • Considering pharmacy workflow in the context of Australian community pharmacy: a pilot time and motion study 

      Cavaye, D; Lehnbom, Elin; Laba, T-L; El-Boustani, E; Joshi, R; Webster, R (Journal article; Tidsskriftartikkel; Peer reviewed, 2018-01-04)
      <p><i>Background</i>: Given time pressures on primary care physicians, utilising pharmacists for chronic disease management is of great interest. However, limited data are available on the current workflow in community pharmacies to guide these discussions.</p> <p><i>Objective</i>: This study aimed to test the feasibility of collecting workflow data from Australian community pharmacies using ...
    • Controlling Antimicrobial Resistance through Targeted, Vaccine-Induced Replacement of Strains 

      Tekle, Yonas I.; Nielsen, Kaare Magne; Liu, Jingzhou; Pettigrew, Melinda M.; Meyers, Lauren A.; Galvani, Alison P.; Townsend, Jeffrey P. (Journal article; Tidsskriftartikkel; Peer reviewed, 2012)
      Vaccination has proven effective in controlling many infectious diseases. However, differential effectiveness with regard to pathogen genotype is a frequent reason for failures in vaccine development. Often, insufficient immune response is induced to prevent infection by the diversity of existing serotypes present in pathogenic populations of bacteria. These vaccines that target a too narrow spectrum ...
    • 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 ...