• Acute effects of orexigenic antipsychotic drugs on lipid and carbohydrate metabolism in rat 

      Jassim, Goran; Skrede, Silje; Vázquez, María Jesús; Wergedahl, Hege; Vik-Mo, Audun O.; Lunder, Niclas; Diéguez, Carlos; Vidal-Puig, Antonio; Berge, Rolf Kristian; López, Miguel; Steen, Vidar Martin; Fernø, Johan (Peer reviewed; Journal article, 2011-07-12)
      This study aims to investigate whether orexigenic antipsychotic drugs may induce dyslipidemia and glucose disturbances in female rats through direct perturbation of metabolically active peripheral tissues, independent of ...
    • Analysis of differentially methylated regions in great apes and extinct hominids provides support for the evolutionary hypothesis of schizophrenia 

      Banerjee, Niladri; Polushina, Tatiana; Bettella, Francesco; Steen, Vidar Martin; Andreassen, Ole Andreas; Le Hellard, Stephanie (Peer reviewed; Journal article, 2018-12-11)
      Introduction: The persistence of schizophrenia in human populations separated by geography and time led to the evolutionary hypothesis that proposes schizophrenia as a by-product of the higher cognitive abilities of modern ...
    • Association between leptin levels and severity of suicidal behaviour in schizophrenia spectrum disorders 

      Gohar, Sherif Mostafa Mohamed Ahmed; Dieset, Ingrid; Steen, Nils Eiel; Mørch, Ragni Helene; Vedal, Trude Seselie Jahr; Reponen, Elina Johanna; Steen, Vidar Martin; Andreassen, Ole Andreas; Melle, Ingrid (Peer reviewed; Journal article, 2019-03-08)
      Objective: Associations between suicidality and lipid dysregulation are documented in mental illness, but the potential role of leptin remains unclear. We examined the association between leptin and suicidal behaviour in ...
    • Association between serum lipid levels, osteoprotegerin and depressive symptomatology in psychotic disorders. 

      Gohar, Sherif Mostafa Mohamed Ahmed; Dieset, Ingrid; Steen, Nils Eiel; Mørch, Ragni Helene; Iversen, Trude Seselie Jahr; Steen, Vidar Martin; Andreassen, Ole Andreas; Melle, Ingrid (Peer reviewed; Journal article, 2018-05-02)
      Although the relationship between positive and negative symptoms of psychosis and dyslipidemia has been thoroughly investigated in recent studies, the potential link between depression and lipid status is still under-investigated. ...
    • Associations between tamoxifen, estrogens, and FSH serum levels during steady state tamoxifen treatment of postmenopausal women with breast cancer 

      Gjerde, Jennifer; Geisler, Jürgen; Lundgren, Steinar; Ekse, Dagfinn; Varhaug, Jan Erik; Mellgren, Gunnar; Steen, Vidar Martin; Lien, Ernst Asbjørn (Peer reviewed; Journal article, 2010-06-21)
      Background The cytochrome P450 (CYP) enzymes 2C19, 2D6, and 3A5 are responsible for converting the selective estrogen receptor modulator (SERM), tamoxifen to its active metabolites 4-hydroxy-tamoxifen (4OHtam) and ...
    • Attenuated Notch signaling in schizophrenia and bipolar disorder 

      Hoseth, Eva Zsuzsanna; Krull, Florian; Dieset, Ingrid; Mørch, Ragni Helene; Hope, Sigrun; Gardsjord, Erlend Strand; Steen, Nils Eiel; Melle, Ingrid; Brattbakk, Hans-Richard; Steen, Vidar Martin; Aukrust, Pål; Djurovic, Srdjan; Andreassen, Ole Andreas; Ueland, Thor (Peer reviewed; Journal article, 2018-03-28)
      The Notch signaling pathway plays a crucial role in neurodevelopment and in adult brain homeostasis. We aimed to further investigate Notch pathway activity in bipolar disorder (BD) and schizophrenia (SCZ) by conducting a ...
    • Brain scans from 21,297 individuals reveal the genetic architecture of hippocampal subfield volumes 

      van der Meer, Dennis; Rokicki, Jaroslav; Kaufmann, Tobias; Còrdova Palomera, Aldo; Moberget, Torgeir; Alnæs, Dag; Bettella, Francesco; Frei, Oleksandr; Doan, Nhat Trung; Sønderby, Ida Elken; Smeland, Olav Bjerkehagen; Agartz, Ingrid; Bertolino, Alessandro; Bralten, Janita; Brandt, Christine Lycke; Buitelaar, Jan K.; Djurovic, Srdjan; van Donkelaar, Marjolein; Dørum, Erlend Solberg; Espeseth, Thomas; Faraone, Stephen V.; Fernandéz, Guillén; Fisher, Simon E.; Franke, Barbara; Haatveit, Beathe Christin; Hartman, Catharina A.; Hoekstra, Pieter J.; Håberg, Asta; Jönsson, Erik G.; Kolskår, Knut-Kristian; Le Hellard, Stephanie; Lund, Martina Jonette; Lundervold, Astri; Lundervold, Arvid; Melle, Ingrid; Monereo Sanchez, Jennifer; Norbom, Linn Christin Bonaventure; Nordvik, Jan Egil; Nyberg, Lars; Oosterlaan, Jaap; Papalino, Marco; Papassotiropoulos, Andreas; Pergola, Giulio; de Quervain, Dominique J.F.; Richard, Geneviéve´; Sanders, Anne-Marthe; Selvaggi, Pierluigi; Shumskaya, Elena; Steen, Vidar Martin; Tønnesen, Siren; Ulrichsen, Kristine Moe; Zwiers, Marcel P.; Andreassen, Ole Andreas; Westlye, Lars Tjelta (Peer reviewed; Journal article, 2018-10-02)
      The hippocampus is a heterogeneous structure, comprising histologically distinguishable subfields. These subfields are differentially involved in memory consolidation, spatial navigation and pattern separation, complex ...
    • Common brain disorders are associated with heritable patterns of apparent aging of the brain 

      Kaufmann, Tobias; van der Meer, Dennis; Doan, Nhat Trung; Schwarz, Emanuel; Lund, Martina Jonette; Agartz, Ingrid; Alnæs, Dag; Barch, Deanna M.; Baur-Streubel, Ramona; Bertolino, Alessandro; Bettella, Francesco; Beyer, Mona K.; Bøen, Erlend; Borgwardt, Stefan; Brandt, Christine Lycke; Buitelaar, Jan; Celius, Elisabeth Gulowsen; Cervenka, Simon; Conzelmann, Annette; Còrdova Palomera, Aldo; Dale, Anders; de Quervain, Dominique J.F.; di Carlo, Pasquale; Djurovic, Srdjan; Dørum, Erlend Solberg; Eisenacher, Sarah; Elvsåshagen, Torbjørn; Espeseth, Thomas; Fatouros-Bergman, Helena; Flyckt, Lena; Franke, Barbara; Frei, Oleksandr; Haatveit, Beathe; Håberg, Asta; Harbo, Hanne Flinstad; Hartman, Catharina A; Heslenfeld, Dirk J; Hoekstra, Pieter J; Høgestøl, Einar August; Jernigan, Terry L.; Jonassen, Rune; Jönsson, Erik Gunnar; Kirsch, Peter; Kłoszewska, Iwona; Kolskår, Knut-Kristian; Landrø, Nils Inge; Le Hellard, Stephanie; Lesch, Klaus-Peter; Lovestone, Simon; Lundervold, Arvid; Lundervold, Astri; Maglanoc, Luigi Angelo; Malt, Ulrik Fredrik; Mecocci, Patrizia; Melle, Ingrid; Meyer-Lindenberg, Andreas; Moberget, Torgeir; Norbom, Linn Christin Bonaventure; Nordvik, Jan Egil; Nyberg, Lars; Oosterlaan, Jaap; Papalino, Marco; Papassotiropoulos, Andreas; Pauli, Paul; Pergola, Giulio; Persson, Karin Ester Torun; Richard, Geneviève; Rokicki, Jaroslav; Sanders, Anne-Marthe; Selbæk, Geir; Shadrin, Alexey A.; Smeland, Olav Bjerkehagen; Soininen, Hilkka; Sowa, Piotr; Steen, Vidar Martin; Tsolaki, Magda; Ulrichsen, Kristine Moe; Vellas, Bruno; Wang, Lei; Westman, Eric; Ziegler, Georg C.; Zink, Mathias; Andreassen, Ole Andreas; Westlye, Lars Tjelta (Peer reviewed; Journal article, 2019)
      Common risk factors for psychiatric and other brain disorders are likely to converge on biological pathways influencing the development and maintenance of brain structure and function across life. Using structural MRI data ...
    • Common variants in the ARC gene are not associated with cognitive abilities 

      Myrum, Craig; Giddaluru, Sudheer; Jacobsen, Kaya Kvarme; Espeseth, Thomas; Nyberg, Lars; Lundervold, Astri; Haavik, Jan; Nilsson, Lars-Göran; Reinvang, Ivar; Steen, Vidar Martin; Johansson, Stefan; Wibrand, Karin; Le Hellard, Stephanie; Bramham, Clive R. (Peer reviewed; Journal article, 2015-09-03)
      Introduction: The Activity-Regulated Cytoskeleton-associated (ARC) gene encodes a protein that is critical for the consolidation of synaptic plasticity and long-term memory formation. Given ARC's key role in synaptic ...
    • Conservation of Distinct Genetically-Mediated Human Cortical Pattern 

      Qian, Peng; Schork, Andrew J.; Bartsch, Hauke; Lo, Min-Tzu; Panizzon, Matthew S.; Westlye, Lars Tjelta; Kremen, William S.; Jernigan, Terry L.; Le Hellard, Stephanie; Steen, Vidar Martin; Espeseth, Thomas; Huentelman, Matt; Håberg, Asta; Agartz, Ingrid; Djurovic, Srdjan; Andreassen, Ole Andreas; Dale, Anders; Schork, Nicholas J.; Chen, Chi-Hua; Schork, Nicholas J (Peer reviewed; Journal article, 2016-07-26)
      The many subcomponents of the human cortex are known to follow an anatomical pattern and functional relationship that appears to be highly conserved between individuals. This suggests that this pattern and the relationship ...
    • Constructing the immune signature of schizophrenia for clinical use and research; an integrative review translating descriptives into diagnostics 

      Kroken, Rune Andreas; Sommer, Iris Else Clara; Steen, Vidar Martin; Dieset, Ingrid; Johnsen, Erik (Peer reviewed; Journal article, 2019)
      Schizophrenia is considered a syndrome comprised by several disease phenotypes, covering a range of underlying pathologies. One of these disease mechanisms seems to involve immune dysregulation and neuroinflammation. While ...
    • DCLK1 Variants Are Associated across Schizophrenia and Attention Deficit/Hyperactivity Disorder 

      Håvik, Bjarte; Fernandes, Carla P. D.; Christoforou, Andrea; Ersland, Kari Merete; Giddaluru, Sudheer; Cichon, Sven; Steen, Vidar Martin; Hellard, Stéphanie Le; Johansson, Stefan; Bramham, Clive R.; Haavik, Jan (Peer reviewed; Journal article, 2012-04-23)
      Doublecortin and calmodulin like kinase 1 (DCLK1) is implicated in synaptic plasticity and neurodevelopment. Genetic variants in DCLK1 are associated with cognitive traits, specifically verbal memory and general cognition. ...
    • Drug-induced activation of SREBP-controlled lipogenic gene expression in CNS-related cell lines: Marked differences between various antipsychotic drugs 

      Fernø, Johan; Skrede, Silje; Vik-Mo, Audun O.; Håvik, Bjarte; Steen, Vidar Martin (Peer reviewed; Journal article, 2006-10-20)
      Background: The etiology of schizophrenia is unknown, but neurodevelopmental disturbances, myelin- and oligodendrocyte abnormalities and synaptic dysfunction have been suggested as pathophysiological factors in this severe ...
    • The ENIGMA Consortium: large-scale collaborative analyses of neuroimaging and genetic data 

      Christoforou, Andrea; Le Hellard, Stephanie; Giddaluru, Sudheer; Steen, Vidar Martin; The ENIGMA Consortium (Peer reviewed; Journal article, 2014-06)
      The Enhancing NeuroImaging Genetics through Meta-Analysis (ENIGMA) Consortium is a collaborative network of researchers working together on a range of large-scale studies that integrate data from 70 institutions worldwide. ...
    • Exploring lithium's transcriptional mechanisms of action in bipolar disorder: a multi-step study 

      Akkouh, Ibrahim; Skrede, Silje; Holmgren, Asbjørn; Ersland, Kari Merete; Hansson, Lars Johan Axel; Bahrami, Shahram; Andreassen, Ole Andreas; Steen, Vidar Martin; Djurovic, Srdjan; Hughes, Timothy (Peer reviewed; Journal article, 2019)
      Lithium has been the first-line treatment for bipolar disorder (BD) for more than six decades. Although the molecular effects of lithium have been studied extensively and gene expression changes are generally believed to ...
    • Exploring the Wnt signaling pathway in schizophrenia and bipolar disorder 

      Hoseth, Eva Zsuzsanna; Krull, Florian; Dieset, Ingrid; Mørch, Ragni Helene; Hope, Sigrun; Gardsjord, Erlend Strand; Steen, Nils Eiel; Melle, Ingrid; Brattbakk, Hans-Richard; Steen, Vidar Martin; Aukrust, Pål; Djurovic, Srdjan; Andreassen, Ole Andreas; Ueland, Thor (Peer reviewed; Journal article, 2018)
      The Wnt signaling pathway plays a crucial role in neurodevelopment and in regulating the function and structure of the adult nervous system. Schizophrenia (SCZ) and bipolar disorder (BD) are severe mental disorders with ...
    • Expression of TCN1 in Blood is Negatively Associated with Verbal Declarative Memory Performance 

      Akkouh, Ibrahim; Ueland, Torill; Andreassen, Ole Andreas; Brattbakk, Hans-Richard; Steen, Vidar Martin; Hughes, Timothy; Djurovic, Srdjan (Peer reviewed; Journal article, 2018-08-23)
      Memory is indispensable for normal cognitive functioning, and the ability to store and retrieve information is central to mental health and disease. The molecular mechanisms underlying complex memory functions are largely ...
    • Gene expression in the rat brain: High similarity but unique differences between frontomedial-, temporal- and occipital cortex 

      Stansberg, Christine; Ersland, Kari Merete; Valk, Paul van der; Steen, Vidar Martin (Peer reviewed; Journal article, 2011-01-26)
      Background: The six-layered neocortex of the mammalian brain may appear largely homologous, but is in reality a modular structure of anatomically and functionally distinct areas. However, global gene expression seems to ...
    • Gene expression profiles in rat brain disclose CNS signature genes and regional patterns of functional specialisation 

      Stansberg, Christine; Vik-Mo, Audun O.; Holdhus, Rita; Breilid, Harald; Srebro, Boleslaw; Petersen, Kjell; Jørgensen, Hugo A.; Jonassen, Inge; Steen, Vidar Martin (Peer reviewed; Journal article, 2007-04-04)
      Background: The mammalian brain is divided into distinct regions with structural and neurophysiological differences. As a result, gene expression is likely to vary between regions in relation to their cellular composition ...
    • Gene-Based Analysis of Regionally Enriched Cortical Genes in GWAS Data Sets of Cognitive Traits and Psychiatric Disorders 

      Ersland, Kari Merete; Christoforou, Andrea; Stansberg, Christine; Espeseth, Thomas; Mattheisen, Manuel; Mattingsdal, Morten; Hardarson, Gudmundur A.; Hansen, Thomas; Fernandes, Carla P. D.; Giddaluru, Sudheer; Breuer, René; Strohmaier, Jana; Djurovic, Srdjan; Nöthen, Markus M.; Rietschel, Marcella; Lundervold, Astri Johansen; Werge, Thomas; Cichon, Sven; Andreassen, Ole Andreas; Reinvang, Ivar; Steen, Vidar Martin; Le Hellard, Stephanie (Peer reviewed; Journal article, 2012-02-22)
      Background: Despite its estimated high heritability, the genetic architecture leading to differences in cognitive performance remains poorly understood. Different cortical regions play important roles in normal cognitive ...