Now showing items 781-800 of 1059

    • Reproductive factors and risk of hormone receptor positive and negative breast cancer: a cohort study. 

      Ritte, Rebecca; Tikk, Kaja; Lukanova, Annekatrin; Tjønneland, Anne; Olsen, Anja; Overvad, Kim; Dossus, Laure; Fournier, Agnes; Clavel-Chapelon, Françoise; Grote, Verena; Boeing, Heiner; Aleksandrova, Krasimira; Trichopoulou, Antonia; Lagiou, Pagona; Trichopoulos, Dimitrios; Palli, Domenico; Berrino, Franco; Mattiello, Amalia; Tumino, Rosario; Sacerdote, Carlotta; Quirós, José Ramón; Buckland, Genevieve; Molina-Montes, Esther; Chirlaque, María Dolores; Ardanaz, Eva; Amiano, Pilar; Bueno-de-Mesquita, H. Bas; van Gils, Carla H.; Peeters, Petra H M; Wareham, Nick; Khaw, Kay-Tee; Key, Timothy J; Travis, Ruth C.; Weiderpass, Elisabete; Dumeaux, Vanessa; Lund, Eiliv; Sund, Malin; Andersson, Anne; Romieu, Isabelle; Rinaldi, Sabina; Vineis, Paolo; Merritt, Melissa A; Riboli, Elio; Kaaks, Rudolf (Journal article; Tidsskriftartikkel; Peer reviewed, 2013)
      Background The association of reproductive factors with hormone receptor (HR)-negative breast tumors remains uncertain. Methods Within the EPIC cohort, Cox proportional hazards models were used to describe the relationships of reproductive factors (menarcheal age, time between menarche and first pregnancy, parity, number of children, age at first and last pregnancies, time since last full-term ...
    • Is a high level of general practitioner consultations associated with low outpatients specialist clinic use? A cross-sectional study 

      Deraas, Trygve Sigvart; Berntsen, Gro; Hasvold, Toralf; Ringberg, Unni; Førde, Olav Helge (Journal article; Tidsskriftartikkel; Peer reviewed, 2013)
      Objective: To examine if increased general practice activity is associated with lower outpatient specialist clinic use. Design: Cross-sectional population based study. Setting: All 430 Norwegian municipalities in 2009. Participants: All Norwegians aged ≥65 years (n=721 915; 56% women—15% of the total population). Main outcome measure: Specialised care outpatient clinic consultations per 1000 ...
    • Obesity and Staphylococcus aureus Nasal Colonization among Women and Men in a General Population 

      Olsen, Karina; Danielsen, Kjersti; Wilsgaard, Tom; Sangvik, Maria; Sollid, Johanna U. Ericson; Thune, Inger; Eggen, Anne Elise; Simonsen, Gunnar Skov; Furberg, Anne-Sofie (Journal article; Tidsskriftartikkel; Peer reviewed, 2013)
      Background: Obesity and diabetes mellitus (DM) have been linked to increased risk of infections, and Staphylococcus aureus nasal colonization is a major risk factor for developing infections with the microbe. We therefore sought to find whether body mass index (BMI) and waist circumference (WC) could be associated with S. aureus colonization independent of DM. Methodology: S. aureus colonization ...
    • Smoking duration before first childbirth: an emerging risk factor for breast cancer? Results from 302,865 Norwegian women 

      Bjerkaas, Eivind; Parajuli, Ranjan; Weiderpass, Elisabete; Engeland, Anders; Gertraud, Maskarinec; Selmer, Randi; Gram, Inger Torhild (Journal article; Tidsskriftartikkel; Peer reviewed, 2013)
      Purpose: Recently, The International Agency for Research on Cancer classified cigarette smoking as possibly carcinogenic to the human breast. Since some new cohort studies have suggested that this risk is confined to women who started to smoke before first childbirth, we wanted to examine the association between smoking and breast cancer, with a focus on time of smoking initiation in relation to the ...
    • A Phylogenetic Study of SPBP and RAI1: Evolutionary Conservation of Chromatin Binding Modules 

      Darvekar, Sagar; Rekdal, Cecilie; Johansen, Terje; Sjøttem, Eva (Journal article; Tidsskriftartikkel; Peer reviewed, 2013)
      Our genome is assembled into and array of highly dynamic nucleosome structures allowing spatial and temporal access to DNA. The nucleosomes are subject to a wide array of post-translational modifications, altering the DNAhistone interaction and serving as docking sites for proteins exhibiting effector or “reader” modules. The nuclear proteins SPBP and RAI1 are composed of several putative “reader” ...
    • Characterisation of the Plasmidome within Enterococcus faecalis Isolated from Marginal Periodontitis Patients in Norway 

      Song, Xiaobo; Sun, Jinglu; Mikalsen, Theresa; Roberts, Adam P.; Sundsfjord, Arnfinn (Journal article; Tidsskriftartikkel; Peer reviewed, 2013)
      The present study aimed to identify and characterize plasmids in a national collection of oral Enterococcus faecalis (n = 106) isolated from patients with marginal periodontitis. Plasmid replicon typing was performed by multiplex-PCR and sequencing with specific primers for 18 rep-families and 1 unique sequence. Additional plasmid analysis by S1-PFGE was performed for comparison. Totally 120 plasmid ...
    • Which Sámi? Sámi inclusion criteria in population-based studies of Sámi health and living conditions in Norway - an exploratory study exemplified with data from the SAMINOR study 

      Pettersen, Torunn; Brustad, Magritt (Journal article; Tidsskriftartikkel; Peer reviewed, 2013)
      Background: In a situation where national censuses do not record information on ethnicity, studies of the indigenous Sámi people’s health and living conditions tend to use varying Sámi inclusion criteria and categorizations. Consequently, the basis on which Sámi study participants are included and categorized when Sámi health and living conditions are explored and compared differs. This may influence ...
    • Body mass index at age 20 and subsequent childbearing: The Adventist Health Study-2. 

      Jacobsen, Bjarne Koster; Knutsen, Synnøve Fønnebø; Oda, Keiji; Fraser, Gary E. (Journal article; Tidsskriftartikkel; Peer reviewed, 2013)
      Background: Some epidemiological, clinical, and laboratory studies suggest that underweight and obesity impact fertility. Methods: This is cross-sectional study of 33,159 North American Adventist women, who were nulliparous at age 20 years and who, as a group, have a healthy lifestyle. Logistic regression analysis was used to assess how body mass index (BMI, kg/m2) at age 20 was related to never ...
    • Homology modeling and ligand docking of Mitogen-activated protein kinase-activated protein kinase 5 (MK5) 

      Lindin, Inger; Wuxiuer, Yimingjiang; Kufareva, Irina; Abagyan, Ruben; Moens, Ugo; Sylte, Ingebrigt; Ravna, Aina Westrheim (Journal article; Tidsskriftartikkel; Peer reviewed, 2013)
      Background: Mitogen-activated protein kinase-activated protein kinase 5 (MK5) is involved in one of the major signaling pathways in cells, the mitogen-activated protein kinase pathway. MK5 was discovered in 1998 by the groups of Houng Ni and Ligou New, and was found to be highly conserved throughout the vertebrates. Studies, both in vivo and in vitro, have shown that it is implicated in tumor ...
    • LMW Heparin Prevents Increased Kidney Expression of Proinflammatory Mediators in (NZBxNZW)F1 Mice 

      Hedberg, Annica; Kanapathippillai, Premasany; Rekvig, Ole Petter; Fenton, Kristin Andreassen (Journal article; Tidsskriftartikkel; Peer reviewed, 2013)
      We have previously demonstrated that continuous infusion of low molecular weight (LMW) heparin delays autoantibody production and development of lupus nephritis in (NZBxNZW)F1 (B/W) mice. In this study we investigated the effect of LMW heparin on renal cytokine and chemokine expression and on nucleosome-mediated activation of nucleosome-specific splenocytes. Total mRNA extracted from kidneys of ...
    • Homology Modeling of Human <gamma>-Butyric Acid Transporters and the Binding of Pro-drugs 5-Aminolevulinic Acid and Methyl Aminolevulinic Acid used in Photodynamic Therapy 

      Baglo, Yan; Gabrielsen, Mari; Sylte, Ingebrigt; Gederaas, Odrun Arna (Journal article; Tidsskriftartikkel; Peer reviewed, 2013)
      Photodynamic therapy (PDT) is a safe and effective method currently used in the treatment of skin cancer. In ALA-based PDT, 5-aminolevulinic acid (ALA), or ALA esters, are used as pro-drugs to induce the formation of the potent photosensitizer protoporphyrin IX (PpIX). Activation of PpIX by light causes the formation of reactive oxygen species (ROS) and toxic responses. Studies have indicated that ...
    • Practical health co-operation-the impact of a referral template on quality of care and health care co-operation: study protocol for a cluster randomized controlled trial 

      Wåhlberg, Henrik; Valle, Per Christian; Malm, Siri; Broderstad, Ann Ragnhild (Journal article; Tidsskriftartikkel; Peer reviewed, 2013)
      Background: The referral letter plays a key role both in the communication between primary and secondary care, and in the quality of the health care process. Many studies have attempted to evaluate and improve the quality of these referral letters, but few have assessed the impact of their quality on the health care delivered to each patient. Methods: A cluster randomized trial, with the general ...
    • ERBB3 is a marker of a ganglioneuroblastoma/ganglioneuroma-like expression profile in neuroblastic tumours 

      Wilzén, Annika; Krona, Cecilie; Sveinbjørnsson, Baldur; Kristiansson, Erik; Dalevi, Daniel; Øra, Ingrid; De Preter, Katleen; Stallings, Raymond L.; Maris, John; Versteeg, Rogier; Nilsson, Staffan; Kogner, Per; Abel, Frida (Journal article; Tidsskriftartikkel; Peer reviewed, 2013)
      Background: Neuroblastoma (NB) tumours are commonly divided into three cytogenetic subgroups. However, by unsupervised principal components analysis of gene expression profiles we recently identified four distinct subgroups, r1-r4. In the current study we characterized these different subgroups in more detail, with a specific focus on the fourth divergent tumour subgroup (r4). Methods: Expression ...
    • A linear combination of pharmacophore hypotheses as a new tool in search or new active compounds - An application for 5-HT1a receptor ligands 

      Warszycki, Dawid; Mordalski, Stefan; Kristiansen, kurt; Kafel, Rafal; Sylte, Ingebrigt; Chilmonczyk, Zdzislaw; Bojarski, Andrzej J. (Journal article; Tidsskriftartikkel; Peer reviewed, 2013)
      This study explores a new approach to pharmacophore screening involving the use of an optimized linear combination of models instead of a single hypothesis. The implementation and evaluation of the developed methodology are performed for a complete known chemical space of 5-HT1AR ligands (3616 active compounds with Ki < 100 nM) acquired from the ChEMBL database. Clusters generated from three different ...
    • Entrance and survival of Brucella pinnipedialis hooded seal strain in human macrophages and epithelial cells 

      Larsen, Anett Kristin; Nymo, Ingebjørg Helena; Briquemont, Benjamin; Sørensen, Karen Kristine; Godfroid, Jacques (Journal article; Tidsskriftartikkel; Peer reviewed, 2013)
      Marine mammal Brucella spp. have been isolated from pinnipeds (B. pinnipedialis) and cetaceans (B. ceti) from around the world. Although the zoonotic potential of marine mammal brucellae is largely unknown, reports of human disease exist. There are few studies of the mechanisms of bacterial intracellular invasion and multiplication involving the marine mammal Brucella spp. We examined the infective ...
    • En pionerforsker 

      Sylte, Ingebrigt; Sager, Georg (Journal article; Tidsskriftartikkel, 2013)
      Professor Svein Dahl ved Universitetet i Tromsø var en framtredende og nyskapende legemiddelforsker. De metodene han benyttet, brukes den dag i dag av farmasøytisk industri og forskere over hele verden.
    • Drug design på data'n 

      Ravna, Aina Westrheim; Sylte, Ingebrigt (Journal article; Tidsskriftartikkel, 2013)
      Hva skjer i hjernen når vi føler oss glade og optimistiske? Hvorfor virker penicillin mot bakterieinfeksjoner, mens paracet virker mot hodepine? Og hvordan i all verden kan antidepressiva påvirke humøret og dermed virke mot depresjon? Svaret er molekyler.
    • Vet brukerne hva de gjør? 

      Salamonsen, Anita (Chronicle; Kronikk, 2013-02-06)
      Nordmenns bruk av alternativ behandling er stadig under debatt blant leger, alternative behandlere og forskere, senest i forbindelse med NRK-programmet Folkeopplysningen. Det heteste temaet er om det finnes holdbar vitenskapelig dokumentasjon for at alternative behandlingsformer virker. Mange ser et paradoks i at alternativ behandling til tross for mangelfull dokumentasjon omsettes for milliardbeløp ...
    • Vitamin D - a systematic literature review for the 5th edition of the Nordic Nutrition Recommendations 

      Lamberg-Allardt, Christel; Brustad, Magritt; Meyer, Haakon E; Steingrimsdottir, Laufey (Journal article; Tidsskriftartikkel; Peer reviewed, 2013)
      Background: The present literature review is part of the NNR5 project with the aim of reviewing and updating the scientific basis of the 4th edition of the Nordic Nutrition Recommendations (NNR) issued in 2004. Objectives: The overall aim was to review recent scientific data on the requirements and health effects of vitamin D and to report it to the NNR5 Working Group, who is responsible for updating ...
    • Plasma Fatty Acid Ratios Affect Blood Gene Expression Profiles - A Cross-Sectional Study of the Norwegian Women and Cancer Post-Genome Cohort 

      Olsen, Karina Standahl; Fenton, Christopher Graham; Frøyland, Livar; Waaseth, Marit; Paulssen, Ruth H; Lund, Eiliv (Journal article; Tidsskriftartikkel; Peer reviewed, 2013)
      High blood concentrations of n-6 fatty acids (FAs) relative to n-3 FAs may lead to a “physiological switch” towards permanent low-grade inflammation, potentially influencing the onset of cardiovascular and inflammatory diseases, as well as cancer. To explore the potential effects of FA ratios prior to disease onset, we measured blood gene expression profiles and plasma FA ratios (linoleic ...