Now showing items 198-217 of 652

    • Early response evaluation by single cell signaling profiling in acute myeloid leukemia 

      Tislevoll, Benedicte Sjo; Hellesøy, Monica; Fagerholt, Oda Helen Eck; Gullaksen, Stein-Erik; Srivastava, Aashish; Birkeland, Even; Kleftogiannis, Dimitrios; Ayuda Duran, Pilar; Piechaczyk, Laure Isabelle; Tadele, Dagim Shiferaw; Skavland, Jørn; Panagiotis, Baliakas; Hovland, Randi; Andresen, Vibeke; Seternes, Ole Morten; Tvedt, Tor Henrik Anderson; Aghaeepour, Nima; Gavasso, Sonia; Porkka, Kimmo; Jonassen, Inge; Fløisand, Yngvar; Enserink, Jorrit; Blaser, Nello; Gjertsen, Bjørn Tore (Journal article; Tidsskriftartikkel; Peer reviewed, 2023-01-07)
      Aberrant pro-survival signaling is a hallmark of cancer cells, but the response to chemotherapy is poorly understood. In this study, we investigate the initial signaling response to standard induction chemotherapy in a cohort of 32 acute myeloid leukemia (AML) patients, using 36-dimensional mass cytometry. Through supervised and unsupervised machine learning approaches, we find that reduction of ...
    • Effect of 8, 9-epoxy eicosapentaenoic acid on the growth of MCF-7 cells 

      Dahlheim, Anne-Helene (Master thesis; Mastergradsoppgave, 2008-05)
      ABSTRACT Epidemiologic studies have indicated that n-3 polyunsaturated fatty acids (PUFAs) supplementation may reduce the incidence of breast cancer, also in vivo and in vitro studies have shown that n-3 PUFAs have an inhibitory effect on breast cancer cells. One important n-3 PUFA are eiocosapentaenoic acid (EPA), which are metabolized to five regioisomeric epoxyeicosatetraenoic acids (epoxy-EPAs) ...
    • Effect of 8,9-epoxy eicosapentaenoic acid on human breast cancer cell line MDA-MB-231 

      Austreid, Ingunn (Master thesis; Mastergradsoppgave, 2008-05)
      Studies have shown that fatty acids from fish and fish oils, like eicosapentaenoic acid (EPA) and docosapentaenoic acid (DHA) may have a beneficial role in cancer by inhibiting proliferation or inducing apoptosis of the cancer cells. Several mechanisms involving different metabolites (eicosanoids) of the fatty acids have been suggested for the anti-cancer actions, but the detailed effects are still ...
    • Effect of antiangiogenic therapy on tumor growth, vasculature and kinase activity in basal- and luminal-like breast cancer xenografts 

      Lindholm, Evita Maria; Kristian, Alexandr; Nalwoga, Hawa; Kruger, Kristi; Nygård, Ståle; Akslen, Lars A.; Mælandsmo, Gunhild (Journal article; Tidsskriftartikkel; Peer reviewed, 2012-03-31)
      Several clinical trials have investigated the efficacy of bevacizumab in breast cancer, and even if growth inhibiting effects have been registered when antiangiogenic treatment is given in combination with chemotherapy no gain in overall survival has been observed. One reason for the lack of overall survival benefit might be that appropriate criteria for selection of patients likely to respond ...
    • Effect of cyclosporine A and tacrolimus on OATP1B1 mediated transport of atorvastatin in an in vitro whole cell model 

      Zabihyan, Behnaz (Master thesis; Mastergradsoppgave, 2008-05)
      BACKGROUND: Dyslipidaemia is more frequent in solid organ transplant recipients than in the general population. In order to reduce the overall cardiovascular risk in transplant patients lipid-lowering drugs, especially statins, have become widely used. However, the use of statins in transplant recipients taking cyclosporine A (CsA) results in significantly increased risk for statin induced side-effects ...
    • The effect of lipid composition and liposome size on the release properties of liposomes-in-hydrogel 

      Hurler, Julia; Zakelj, Simon; Mravljak, Janez; Pajk, Stane; Kristl, Albin; Schubert, Rolf; Skalko-Basnet, Natasa (Journal article; Tidsskriftartikkel; Peer reviewed, 2013)
      To study the release of liposome-associated drugs into hydrogels, we designed and synthesized two pH-sensitive rhodamine derivatives to use as model compounds of different lipophilicities. The dyes were fluorescent when in the free form released from liposomes into the chitosan hydrogel, but not when incorporated within liposomes. The effect of liposomal composition, surface charge and vesicle size ...
    • The effect of low-dose naltrexone on medication in inflammatory bowel disease: A quasi experimental before-and-after prescription database study 

      Raknes, Guttorm; Simonsen, Pia; Småbrekke, Lars (Journal article; Tidsskriftartikkel; Peer reviewed, 2018-01-27)
      Background and Aims: Low-dose naltrexone [LDN] is a controversial off-label treatment used by many Crohn’s disease [CD] and ulcerative colitis [UC] patients. A small number of preliminary studies indicate that LDN might be beneficial in CD, but evidence is too scarce to demonstrate efficacy. We sought to examine whether initiation of LDN therapy by patients with inflammatory bowel disease [IBD] ...
    • Effect of tumor microenvironment-derived factors on melanoma cell growth and drug-response : an in vitro study in three-dimensional cultures. 

      Rist, Maria (Master thesis; Mastergradsoppgave, 2011-06-07)
      The incidence rate of malignant melanoma is increasing in Norwegian population as well as worldwide. It’s one of the most aggressive human cancers showing exceptional abilities to metastasize and develop resistance to therapy, and ccurrently there are no effective treatments against metastatic melanoma. Traditionally, melanoma aggressiveness was linked to intrinsic properties of the malignant cells ...
    • The effect of β-lactamase evolution on biofilm formation in Vibrio cholerae 

      Haukefer, Anne Sofie Bernhardsen (Master thesis; Mastergradsoppgave, 2023-05-15)
      Antimicrobial resistance (AMR) has emerged as one of the greatest threats to public health in the 21st century. Especially, the production of -lactamase enzymes has become the leading cause of -lactam resistance in Gram-negative pathogens. In addition, many of the pathogens associated with extensive antimicrobial resistance form biofilms, which further increases their persistence. Studies from ...
    • Efficient and scalable synthesis of α,α-­disubstituted β-amino amides 

      Paulsen, Marianne Hagensen; Engqvist, Magnus; Ausbacher, Dominik; Strøm, Morten Bøhmer; Bayer, Annette (Journal article; Tidsskriftartikkel; Peer reviewed, 2016-07-12)
      A practical and efficient methodology for the preparation of 2-aminoethyl α,α-disubstituted β-amino amides in three steps from methyl cyanoacetate has been developed. The key step in the synthesis was the chemoselective reduction of the nitrile group in presence of an amide and aryl halide functionalities. Reduction with RANEY® Nickel catalyst, either with molecular hydrogen (8–10 bar) or under ...
    • Efflux pump-mediated drug resistance in Burkholderia 

      Podnecky, Nicole; Rhodes, Katherine A.; Schweizer, Herbert P. (Journal article; Tidsskriftartikkel; Peer reviewed, 2015-04-14)
      Several members of the genus Burkholderia are prominent pathogens. Infections caused by these bacteria are difficult to treat because of significant antibiotic resistance. Virtually all Burkholderia species are also resistant to polymyxin, prohibiting use of drugs like colistin that are available for treatment of infections caused by most other drug resistant Gram-negative bacteria. Despite clinical ...
    • Eksperimentell in vitro ”screening” og molekylær dokking av forbindelser med mulig hemmende effekt på Thermolysin og Pseudolysin 

      Bilto, Irina Victorovna (Master thesis; Mastergradsoppgave, 2011-06)
      To substrater ble brukt i de eksperimetelle studiene. De er referet til som Bradykinin-lignende substrat og AGLA substrat i oppgaven. De eksperimentelle forsøkene gav Km verdi for Bradykinin lignende substrat for Thermolysin fra Bacillus thermoproteolyticus eubakterie på 17.7 +/- 4.3 μM og Pseudolysin fra Pseudomonas aeruginosa på 7.4 +/- 1.3 μM. For ”AGLA” substrat ble Km for Thermolysin målt til ...
    • Elastic liposomes-in-vehicle formulations destined for skin therapy: the synergy between type of liposomes and vehicle 

      Palac, Zora; Hurler, Julia; Skalko-Basnet, Natasa; Filipovic-Grcic, Jelena; Vanic, Zeljka (Journal article; Tidsskriftartikkel; Peer reviewed, 2014-07-14)
    • Electrospinning of chloramphenicol-containing nanofibrous dressings for treatment of chronic wounds 

      Schulte Werning, Laura; Murugaiah, Anjanah; Skalko-Basnet, Natasa; Holsæter, Ann Mari (Conference object; Konferansebidrag, 2021-03-10)
      <p><i>Background</i> An efficient treatment is crucial to overcome the delayed healing process and high infection rate in chronic wounds. Nanofibrous dressings, having a nano‐sized fiber structure, can enhance cell ingrowth and support the healing process. In addition, nanofibers can deliver active ingredients e.g. antibiotics into the wound to treat wound infection. By incorporating broad‐spectrum ...
    • Electrospinning of nanofibers with chitosan and B-glucan as active wound healing ingredients: Optimization and characterization 

      Olaussen, Julie Wik (Mastergradsoppgave; Master thesis, 2020-05-14)
      Wound healing is a complex and highly regulated process, vital for preserving the barrier function of the skin. However, several underlying pathologies have the ability to influence the cascade of events involved in this process, resulting in the development of chronic wounds. The heterogeneous nature of chronic wounds increases the requirements of novel wound dressings. Hence, the development of ...
    • Electrospun Amphiphilic Nanofibers as Templates for In Situ Preparation of Chloramphenicol-Loaded Liposomes 

      Laidmae, Ivo; Meos, Andres; Alainezhad Kjærvik, Irja; Ingebrigtsen, Sveinung Gaarden; Skalko-Basnet, Natasa; Kirsimäe, Kalle; Romann, Tavo; Joost, Urmas; Kisand, Vambola; Kogermann, Karin (Journal article; Tidsskriftartikkel; Peer reviewed, 2021-10-20)
      The hydration of phospholipids, electrospun into polymeric nanofibers and used as templates for liposome formation, offers pharmaceutical advantages as it avoids the storage of liposomes as aqueous dispersions. The objective of the present study was to electrospin and characterize amphiphilic nanofibers as templates for the preparation of antibiotic-loaded liposomes and compare this method with ...
    • Electrospun amphiphilic nanofibers for the in situ preparation and delivery of drug-loaded liposomes 

      Kjærvik, Irja Alainezhad (Master thesis; Mastergradsoppgave, 2015-05-13)
      The physical stability is crucial in formulating liposomes for drug delivery applications. The objective of the present study was to develop and evaluate the electrospun amphiphilic nanofibers intended for the templates and delivery of drug-loaded liposomes. This approach exploits the hydration of phospholipids deposited on electrospun nanofibers for the formation of liposomes, and the strategy was ...
    • Elevating Safe Use of Over-The-Counter Medications in Older Adults: A Narrative Review of Pharmacy Involved Interventions and Recommendations for Improvement 

      Lehnbom, Elin; Berbakov, Maria E.; Hoffins, Emily L.; Moon, Jukrin; Welch, Lauren; Chui, Michelle A. (Journal article; Tidsskriftartikkel; Peer reviewed, 2023-06-20)
      Over-the-counter (OTC) medications are products that have been made easily accessible to allow patients to treat common ailments without a prescription and the cost of a doctor’s visit. These medications are generally considered safe; however, there is still a potential for these medications to lead to adverse health outcomes. Older adults (ages 50+) are especially susceptible to these adverse health ...
    • Emergence and dissemination of antimicrobial resistance in Escherichia coli causing bloodstream infections in Norway in 2002–17: a nationwide, longitudinal, microbial population genomic study 

      Gladstone, Rebecca Ashley; McNally, Alan; Pöntinen, Anna Kaarina; Tonkin-Hill, Gerry; Lees, John A.; Skytén, Kusti Onni; Cléon, Francois Pierre Alexandre; Christensen, Martin Owczarek Korsner; Haldorsen, Bjørg; Bye, Kristina K.; Gammelsrud, Karianne Wiger; Hjetland, Reidar; Kümmel, Angela; Larsen, Hege; Lindemann, Paul Christoffer; Löhr, Iren Høyland; Marvik, Åshild; Nilsen, Einar; Noer, Marie Therese; Simonsen, Gunnar Skov; Steinbakk, Martin; Tofteland, Ståle; Vattøy, Marit; Bentley, Stephen D.; Croucher, Nicholas J.; Parkhill, Julian; Johnsen, Pål Jarle; Samuelsen, Ørjan; Corander, Jukka (Journal article; Tidsskriftartikkel; Peer reviewed, 2021-05-10)
      Background - The clonal diversity underpinning trends in multidrug resistant Escherichia coli causing bloodstream infections remains uncertain. We aimed to determine the contribution of individual clones to resistance over time, using large-scale genomics-based molecular epidemiology.<p> <p>Methods - This was a longitudinal, E coli population, genomic, cohort study that sampled isolates from ...
    • Empirical prescribing of penicillin G/V reduces risk of readmission of hospitalized patients with community-acquired pneumonia in Norway: a retrospective observational study 

      Høgli, June Utnes; Garcia, Beate Hennie; Svendsen, Kristian; Skogen, Vegard; Småbrekke, Lars (Journal article; Tidsskriftartikkel; Peer reviewed, 2020-06-15)
      <i>Background</i> - Norwegian guideline recommendations on first-line empirical antibiotic prescribing in hospitalised patients with community-acquired pneumonia (CAP) are penicillin G/V in monotherapy, or penicillin G in combination with gentamicin (or cefotaxime) in severely ill patients. The aim of this study was to explore how different empirical antibiotic treatments impact on length of hospital ...