• Analysis of methylation data with imputation with blocks (MethylBlocks) 

      Meng, Wei; Ray, Mithlesh Kumar; Fenton, Christopher Graham; Anderssen, Endre; Paulssen, Ruth H (Conference object; Konferansebidrag, 2022)
      <p><i>Background -</i> Analysis of methylation data is dependent on two inputs. The total number of reads at any given cytosine site (coverage), and how many of those cytosines are methylated (methylation). Both the large number of sites and low coverage can cause problems in the analysis of methylation data. Likewise finding DMR is computationally and statistically challenging. Here we present a ...
    • Anti-apoptotic genes and non-coding RNAs are potential outcome predictors for ulcerative colitis 

      Meng, Wei; Johnsen, Kay-Martin; Fenton, Christopher Graham; Florholmen, Jon; Paulssen, Ruth H (Journal article; Tidsskriftartikkel; Peer reviewed, 2023-05-18)
      Due to the lack of clinical, immunologic, genetic, and laboratory markers to predict remission in ulcerative colitis (UC) without relapse, there is no clear recommendation regarding withdrawal of therapy. Therefore, this study was to investigate if transcriptional analysis together with Cox survival analysis might be able to reveal molecular markers that are specific for remission duration and ...
    • Associations of breast cancer related exposures and gene expression profiles in normal breast tissue - The Norwegian Women and Cancer normal breast tissue study 

      Krum-Hansen, Sanda; Standahl-Olsen, Karina; Anderssen, Endre; Frantzen, Jan Ole; Lund, Eiliv; Paulssen, Ruth H (Journal article; Tidsskriftartikkel; Peer reviewed, 2023-01-08)
      Background Normal breast tissue is utilized in tissue-based studies of breast carcinogenesis. While gene expression in breast tumor tissue is well explored, our knowledge of transcriptomic signatures in normal breast tissue is still incomplete. The aim of this study was to investigate variability of gene expression in a large sample of normal breast tissue biopsies, according to breast cancer related ...
    • Cancer-associated fibroblasts from human NSCLC survive ablative doses of radiation but their invasive capacity is reduced 

      Hellevik, Turid; Pettersen, ingvild; Berg, Vivian; Winberg, Jan-Olof; Moe, Bjørn Torvald Greve; Bartnes, Kristian; Paulssen, Ruth H; Busund, Lill-Tove; Bremnes, Roy M.; Chalmers, Antony; Martinez, Inigo Zubiavrre (Journal article; Tidsskriftartikkel; Peer reviewed, 2012)
      BACKGROUND: Cancer-Associated Fibroblasts (CAFs) are significant components of solid malignancies and play central roles in cancer sustainability, invasion and metastasis. In this study we have investigated the invasive capacity and matrix remodelling properties of human lung CAFs after exposure to ablative doses of ionizing radiation (AIR), equivalent to single fractions delivered by stereotactic ...
    • Changes in the human transcriptome upon vitamin D supplementation 

      Pasing, Yvonne; Fenton, Christopher Graham; Jorde, Rolf; Paulssen, Ruth H (Journal article; Tidsskriftartikkel; Peer reviewed, 2017-03-19)
      Vitamin D is hydroxylated in the liver and kidneys to its active form, which can bind to the vitamin D receptor (VDR). The VDR is present in a wide variety of different cells types and tissues and acts as a transcription factor. Although activation of the VDR is estimated to regulate expression of up to 5% of the human genome, our study is the first analysing gene expression after supplementation ...
    • Deciphering Normal Blood Gene Expression Variation-The NOWAC Postgenome Study 

      Dumeaux, vanessa; Nuel, G; Børresen-Dale, Anne-Lise; Olsen, Karina Standahl; Paulssen, Ruth H; Lund, Eiliv (Journal article; Tidsskriftartikkel; Peer reviewed, 2010)
    • Differences in gene expression between first and third trimester human placenta : a microarray study. 

      Sitras, Vasilis; Fenton, Christopher Graham; Paulssen, Ruth H; Vårtun, Åse; Acharya, Ganesh (Journal article; Tidsskriftartikkel; Peer reviewed, 2012)
      The human placenta is a rapidly developing organ that undergoes structural and functional changes throughout the pregnancy. Our objectives were to investigate the differences in global gene expression profile, the expression of imprinted genes and the effect of smoking in first and third trimester normal human placentas. Placental samples were collected from 21 women with uncomplicated pregnancies ...
    • DNA hypo-methylation facilitates anti-inflammatory responses in severe ulcerative colitis 

      Taman, Hagar; Fenton, Christopher Graham; Anderssen, Endre; Florholmen, Jon; Paulssen, Ruth H (Journal article; Tidsskriftartikkel; Peer reviewed, 2021-04-01)
      Severe ulcerative colitis (UC) is a potentially life-threatening disease with a potential colorectal cancer (CRC) risk. The aim of this study was to explore the relationship between transcriptomic and genome-wide DNA methylation profiles in a well-stratified, treatment-naïve severe UC patient population in order to define specific epigenetic changes that could be responsible for the grade of disease ...
    • Endogenous IL-1 receptor antagonist restricts healthy and malignant myeloproliferation 

      Villatoro, Alicia; Cuminetti, Vincent; Bernal, Aurora; Torroja, Carlos; Cossío, Itziar; Benguría, Alberto; Ferré, Marc; Konieczny, Joanna; Vázquez, Enrique; Rubio, Andrea; Utnes, Peter Andree; You, Xiaona; Fenton, Christopher Graham; Paulssen, Ruth H; Zhang, Jing; Sánchez-Cabo, Fatima; Dopazo, Ana; Vik, Anders; Anderssen, Endre; Hidalgo, Andres; Arranz, Lorena (Journal article; Tidsskriftartikkel; Peer reviewed, 2023-01-03)
      Here we explored the role of interleukin-1β (IL-1β) repressor cytokine, IL-1 receptor antagonist (IL-1rn), in both healthy and abnormal hematopoiesis. Low IL-1RN is frequent in acute myeloid leukemia (AML) patients and represents a prognostic marker of reduced survival. Treatments with IL-1RN and the IL-1β monoclonal antibody canakinumab reduce the expansion of leukemic cells, including CD34+ ...
    • Fibrosis Mediators in the Colonic Mucosa of Acute and Healed Ulcerative Colitis 

      Gundersen, Mona Dixon; Goll, Rasmus; Fenton, Christopher Graham; Anderssen, Endre; Sørbye, Sveinung Wergeland; Florholmen, Jon; Paulssen, Ruth H (Journal article; Tidsskriftartikkel; Peer reviewed, 2019-10-03)
      <i>OBJECTIVES</i>: A healed intestinal mucosa is the aim of therapy in acute ulcerative colitis (UC). Disruption of mucosal wound healing may lead to severe complications including intestinal fibrosis. This study examined mucosal gene expression in the healing process of acute UC with a special focus on known mediators of fibrosis.<p> <p><i>METHODS</i>: Endoscopic biopsies from patients with ...
    • Genome-Wide DNA Methylation in Treatment-Naïve Ulcerative Colitis 

      Taman, Hagar; Fenton, Christopher Graham; Hensel, Inga Viktoria; Anderssen, Endre; Florholmen, Jon; Paulssen, Ruth H (Journal article; Tidsskriftartikkel; Peer reviewed, 2018-08-22)
      <p><i>Background and Aims</i>: The aim of this study was to investigate the genome-wide DNA methylation status in treatment-naïve ulcerative colitis [UC], and to explore the relationship between DNA methylation patterns and gene expression levels in tissue biopsies from a well-stratified treatment-naïve UC patient group.</p> <p><i>Methods</i>; Mucosal biopsies from treatment-naïve patients [n = ...
    • Identifying anti-TNF response biomarkers in ulcerative colitis using a diffusion-based signalling model 

      Singh, Amrinder; Anderssen, Endre; Fenton, Christopher Graham; Paulssen, Ruth H (Journal article; Tidsskriftartikkel; Peer reviewed, 2021-08-18)
      <p><i>Motivation:</i> Resistance to anti-TNF therapy in subgroups of ulcerative colitis (UC) patients is a major challenge and incurs significant treatment costs. Identification of patients at risk of nonresponse to anti-TNF is of major clinical importance. To date, no quantitative computational framework exists to develop a complex biomarker for the prognosis of UC treatment. Modelling patient-wise ...
    • Identifying predictive signalling networks for Vedolizumab response in ulcerative colitis. 

      Singh, A.; Fenton, Christopher Graham; Anderssen, Endre; Paulssen, Ruth H (Journal article; Tidsskriftartikkel; Peer reviewed, 2022-05-11)
      Background - In ulcerative colitis (UC), the molecular mechanisms that drive disease development and patient response to therapy are not well understood. A significant proportion of patients with UC fail to respond adequately to biologic therapy. Therefore, there is an unmet need for biomarkers that can predict patients’ responsiveness to the available UC therapies as well as ascertain the most ...
    • The impact of partial hepatectomy on oxidative state in the liver remnant - An in vivo swine model 

      Florholmen-Kjær, Åse; Goll, Rasmus; Fuskevåg, Ole-Martin; Nygård, Ingvild; Paulssen, Ruth H; Revhaug, Arthur; Mortensen, Kim Erlend (Journal article; Tidsskriftartikkel; Peer reviewed, 2016-05-24)
      Background Previous studies on oxidative state after partial hepatectomy (PHx) report conflicting data on levels of glutathione (GSH) and are mainly presented in rodent models by methodology less sensitive than the present technologies. The current swine model presents GSH levels and the following genetic response post-PHx, utilizing an analytical platform more sensitive and precise than earlier ...
    • Methylation-regulated long non-coding RNA expression in ulcerative colitis 

      Fenton, Christopher Graham; Ray, Mithlesh Kumar; Meng, Wei; Paulssen, Ruth H (Journal article; Tidsskriftartikkel; Peer reviewed, 2023-06-22)
      Long non-coding RNAs (lncRNAs) have been shown to play a role in the pathogenesis of ulcerative colitis (UC). Although epigenetic processes such as DNA methylation and lncRNA expression are well studied in UC, the importance of the interplay between the two processes has not yet been fully explored. It is, therefore, believed that interactions between environmental factors and epigenetics ...
    • Novel long non-coding RNAs of relevance for ulcerative colitis pathogenesis 

      Ray, Mithlesh Kumar; Fenton, Christopher Graham; Paulssen, Ruth H (Journal article; Tidsskriftartikkel; Peer reviewed, 2022-02-06)
      Background and aims: The study aimed to identify yet unknown and uncharacterized long non-coding RNAs (lncRNAs) in treatment-naïve ulcerative colitis (UC), and to define their possible roles in UC pathogenesis. For that purpose, accurate quantification methods for lncRNA transcript detection, multiple and “stringent” strategies were applied. New insights in the regulation of functional genes and ...
    • Novel long-coding RNAs of relevance for ulcerative colitis pathogenesis 

      Ray, Mithlesh Kumar; Fenton, Christopher Graham; Paulssen, Ruth H (Conference object; Konferansebidrag, 2022)
      <p>Introduction - LncRNAs have become a growing field of research. They are involved in diverse biological processes including expression regulation, and chromatin modification. Many lncRNAs have been characterized as involved in the occurrence and development of various human diseases, including cancer. A growing body of evidence implies a role for lncRNAs in UC by modulating the intestinal barrier, ...
    • 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 ...
    • Profiling the T Cell Receptor Alpha/Delta Locus in Salmonids 

      Edholm, Eva-Stina; Fenton, Christopher Graham; Mondot, Stanislas; Paulssen, Ruth H; Lefranc, Marie-Paule; Boudinot, Pierre; Magadan, Susana (Journal article; Tidsskriftartikkel; Peer reviewed, 2021-10-18)
      In jawed vertebrates, two major T cell populations have been characterized. They are defined as α/β or γ/δ T cells, based on the expressed T cell receptor. Salmonids (family Salmonidae) include two key teleost species for aquaculture, rainbow trout (Oncorhynchus mykiss) and Atlantic salmon (Salmo salar) which constitute important models for fish immunology and important targets for vaccine development. ...
    • Prognostic value of the MicroRNA regulators dicer and drosha in non-small-cell lung cancer: co-expression of Drosha and miR-126 predicts poor survival 

      Lønvik, Kenneth; Sørbye, Sveinung Wergeland; Nilsen, Marit Nina; Paulssen, Ruth H (Journal article; Tidsskriftartikkel; Peer reviewed, 2014-12-11)
      Dicer and Drosha are important enzymes for processing microRNAs. Recent studies have exhibited possible links between expression of different miRNAs, levels of miRNA processing enzymes, and cancer prognosis. We have investigated the prognostic impact of Dicer and Drosha and their correlation with miR-126 expression in a large cohort of non-small cell lung cancer (NSCLC) patients. We aimed to find ...