Blar i Bergen Open Research Archive på forfatter "Lønning, Per Eystein"

Viser treff 41-53 av 53

    • Persistence of disseminated tumor cells after neoadjuvant treatment for locally advanced breast cancer predicts poor survival 

      Mathiesen, Randi Margit Ruud; Borgen, Elin; Renolen, Anne; Løkkevik, Erik; Nesland, Jahn M.; Anker, Gun; Østenstad, Bjørn; Lundgren, Steinar; Risberg, Terje; Mjaaland, Ingvil; Kvalheim, Gunnar; Lønning, Per Eystein; Naume, Bjørn (Peer reviewed; Journal article, 2012-08-14)
      Introduction: Presence of disseminated tumor cells (DTCs) in bone marrow (BM) and circulating tumor cells (CTC) in peripheral blood (PB) predicts reduced survival in early breast cancer. The aim of this study was to determine ...

    • Polymorphisms in the TP53-MDM2-MDM4-axis in patients with rheumatoid arthritis 

      Gansmo, Liv Beathe; Lie, Benedicte Alexandra; Mæhlen, Marthe Thoresen; Vatten, Lars Johan; Romundstad, Pål Richard; Hveem, Kristian; Lønning, Per Eystein; Knappskog, Stian (Journal article; Peer reviewed, 2021)
      Background In addition to being a tumour suppressor, TP53 is a suppressor of inflammation, and dysfunction of this gene has been related to autoimmune diseases. Patients with autoimmunity, such as rheumatoid arthritis ...

    • Population distribution and ancestry of the cancer protective MDM2 SNP285 (rs117039649) 

      Knappskog, Stian; Gansmo, Liv Beathe; Dibirova, Khadizha; Metspalu, Andres; Cybulski, Cezary; Peterlongo, Paolo; Aaltonen, Lauri; Vatten, Lars Johan; Romundstad, Pål Richard; Hveem, Kristian; Devilee, Peter; Evans, Gareth D; Lin, Dongxin; Van Camp, Guy; Manolopoulos, Vangelis G; Osorio, Ana; Milani, Lili; Ozcelik, Tayfun; Zalloua, Pierre; Mouzaya, Francis; Bliznetz, Elena; Balanovska, Elena; Pocheshkova, Elvira; Kucinskas, Vaidutis; Atramentova, Lubov; Nymadawa, Pagbajabyn; Titov, Konstantin; Lavryashina, Maria; Yusupov, Yuldash; Bogdanova, Natalia; Koshel, Sergey; Zamora, Jorge; Wedge, David C.; Charlesworth, Deborah; Dörk, Thilo; Balanovsky, Oleg; Lønning, Per Eystein (Peer reviewed; Journal article, 2014-04-18)
      The MDM2 promoter SNP285C is located on the SNP309G allele. While SNP309G enhances Sp1 transcription factor binding and MDM2 transcription, SNP285C antagonizes Sp1 binding and reduces the risk of breast-, ovary- and ...

    • Predictive and Prognostic Impact of TP53 Mutations and MDM2 Promoter Genotype in Primary Breast Cancer Patients Treated with Epirubicin or Paclitaxel 

      Chrisanthar, Ranjan; Knappskog, Stian; Løkkevik, Erik; Anker, Gun Birgitta; Østenstad, Bjørn; Lundgren, Steinar; Risberg, Terje; Mjaaland, Ingvil; Skjønsberg, Gudbrand; Aas, Turid; Schlichting, Ellen; Fjösne, Hans E.; Nysted, Arne; Lillehaug, Johan; Lønning, Per Eystein (Peer reviewed; Journal article, 2011-04-27)
      Background: TP53 mutations have been associated with resistance to anthracyclines but not to taxanes in breast cancer patients. The MDM2 promoter single nucleotide polymorphism (SNP) T309G increases MDM2 activity and may ...

    • Prenatal BRCA1 epimutations contribute significantly to triple-negative breast cancer development 

      Nikolaienko, Oleksii; Eikesdal, Hans Petter; Berge, Elisabet Ognedal; Gilje, Bjørnar; Lundgren, Steinar; Blix, Egil Støre; Espelid, Helge; Geisler, Jürgen; Geisler, Stephanie; Janssen, Emiel; Yndestad, Synnøve; Minsaas, Laura; Leirvaag, Beryl; Lillestøl, Reidun Kristine; Knappskog, Stian; Lønning, Per Eystein (Journal article; Peer reviewed, 2023)
      Background Normal cell BRCA1 epimutations have been associated with increased risk of triple-negative breast cancer (TNBC). However, the fraction of TNBCs that may have BRCA1 epimutations as their underlying cause is ...

    • Prevalence of the CHEK2 R95* germline mutation 

      Knappskog, Stian; Leirvaag, Beryl; Gansmo, Liv Beate; Romundstad, Pål; Hveem, Kristian; Vatten, Lars; Lønning, Per Eystein (Peer reviewed; Journal article, 2016-09-27)
      Background: While germline CHEK2 mutations have been linked to a moderately elevated cancer risk, to date, a limited number of such mutations have been identified. Recently, we reported a germline nonsense mutation (C283T; ...

    • Prognostic value of metabolic response in breast cancer patients receiving neoadjuvant chemotherapy 

      Cao, Maria Dung; Giskeødegård, Guro F.; Bathen, Tone Frost; Sitter, Beathe; Bofin, Anna; Lønning, Per Eystein; Lundgren, Steinar; Gribbestad, Ingrid S. (Peer reviewed; Journal article, 2012-01-25)
      Background: Today’s clinical diagnostic tools are insufficient for giving accurate prognosis to breast cancer patients. The aim of our study was to examine the tumor metabolic changes in patients with locally advanced ...

    • Quantitative DNA methylation analyses reveal stage dependent DNA methylation and association to clinico-pathological factors in breast tumors 

      Klajic, Jovana; Fleischer, Thomas; Dejeux, Emelyne; Edvardsen, Hege; Warnberg, Fredrik; Bukholm, Ida Rashida Khan; Lønning, Per Eystein; Solvang, Hiroko Kato; Børresen-Dale, Anne-Lise; Tost, Jörg; Kristensen, Vessela N. (Peer reviewed; Journal article, 2013-10-05)
      Background: Aberrant DNA methylation of regulatory genes has frequently been found in human breast cancers and correlated to clinical outcome. In the present study we investigate stage specific changes in the DNA methylation ...

    • ramr: an R/Bioconductor package for detection of rare aberrantly methylated regions 

      Nikolaienko, Oleksii; Lønning, Per Eystein; Knappskog, Stian (Journal article; Peer reviewed, 2022)
      Motivation: With recent advances in the field of epigenetics, the focus is widening from large and frequent disease- or phenotype-related methylation signatures to rare alterations transmitted mitotically or transgenerationally ...

    • Relationship of body mass index with aromatisation and plasma and tissue oestrogen levels in postmenopausal breast cancer patients treated with aromatase inhibitors 

      Lønning, Per Eystein; Haynes, Benjamin P.; Dowsett, Mitch (Peer reviewed; Journal article, 2014-02-04)
      Background: Recent data have raised concern about the clinical efficacy of aromatase inhibitors in overweight and/or obese breast cancer patients. We report in vivo aromatase inhibition and plasma and tissue oestrogen ...

    • Replication protein A prevents accumulation of single-stranded telomeric DNA in cells that use alternative lengthening of telomeres 

      Grudic, Amra; Jul-Larsen, Åsne; Haring, SJ; Wold, MS; Lønning, Per Eystein; Bjerkvig, Rolf; Bøe, Stig Ove (Peer reviewed; Journal article, 2007-10-24)
      The activation of a telomere maintenance mechanism is required for cancer development in humans. While most tumors achieve this by expressing the enzyme telomerase, a fraction (5–15%) employs a recombination-based mechanism ...

    • Simultaneous Quantification of Aromatase Inhibitors and Estrogens in Postmenopausal Breast Cancer Patients 

      Bertelsen, Bjørn-Erik; Viste, Kristin; Helland, Thomas; Hagland, Magnus; Søiland, Håvard; Geisler, Jürgen; Lende, Tone Hoel; Lønning, Per Eystein; Sagen, Jørn Vegard; Mellgren, Gunnar; Almås, Bjørg (Journal article; Peer reviewed, 2021)
      Context Currently there are no assays that can simultaneously quantify serum levels of the third-generation aromatase inhibitors (AIs): letrozole, anastrozole, and exemestane, and the ultra-low levels of estrogens in ...

    • TP53 status predicts long-term survival in locally advanced breast cancer after primary chemotherapy 

      Eikesdal, Hans Petter; Knappskog, Stian; Aas, Turid; Lønning, Per Eystein (Peer reviewed; Journal article, 2014-10)
      Background: Before the advent of neoadjuvant chemotherapy, radiotherapy and surgery alone were associated with a high risk of uncontrolled locoregional relapses in locally advanced breast cancer (LABC). Material and methods: ...