Blar i Bergen Open Research Archive på forfatter "Steen, Nils Eiel"
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Identification of novel genomic risk loci shared between common epilepsies and psychiatric disorders
Karadag, Naz; Shadrin, Alexey; O'Connell, Kevin S; Hindley, Guy Frederick Lanyon; Rahman, Zillur; Parker, Nadine; Bahrami, Shahram; Fominykh, Vera; Cheng, Weiqiu; Holen, Børge; Alvestad, Silje; Taubøll, Erik; Steen, Nils Eiel; Djurovic, Srdjan; Dale, Anders M; Frei, Oleksandr; Andreassen, Ole; Smeland, Olav Bjerkehagen (Journal article; Peer reviewed, 2023)Psychiatric disorders and common epilepsies are heritable disorders with a high comorbidity and overlapping symptoms. However, the causative mechanisms underlying this relationship are poorly understood. Here we aimed to ... -
Immune marker levels in severe mental disorders: associations with polygenic risk scores of related mental phenotypes and psoriasis
Werner, Maren Caroline Frogner; Wirgenes, Katrine Verena; Shadrin, Alexey; Lunding, Synve Hoffart; Rødevand, Linn; Hjell, Gabriela; Ormerod, Monica Bettina E. Greenwood; Haram, Marit; Agartz, Ingrid; Djurovic, Srdjan; Melle, Ingrid; Aukrust, Pål; Ueland, Thor; Andreassen, Ole; Steen, Nils Eiel (Journal article; Peer reviewed, 2022)Several lines of evidence implicate immune abnormalities in the pathophysiology of severe mental disorders (SMD) and comorbid mental disorders. Here, we use the data from genome-wide association studies (GWAS) of autoimmune ... -
Improvement in verbal learning over the first year of antipsychotic treatment is associated with serum HDL levels in a cohort of first episode psychosis patients
Gjerde, Priyanthi Borgen; Simonsen, Carmen Elisabeth; Lagerberg, Trine Vik; Steen, Nils Eiel; Ueland, Torill; Andreassen, Ole Andreas; Steen, Vidar Martin; Melle, Ingrid (Peer reviewed; Journal article, 2019-04-27)To investigate whether changes in serum lipids are associated with cognitive performance in first episode psychosis (FEP) patients during their first year of antipsychotic drug treatment. One hundred and thirty-two ... -
Impulsivity across severe mental disorders: a cross-sectional study of immune markers and psychopharmacotherapy
Hjell, Gabriela; Rokicki, Jaroslav; Szabo, Attila; Holst, Rene; Tesli, Natalia; Bell, Christina; Fischer-Vieler, Thomas; Werner, Maren Caroline Frogner; Lunding, Synve Hoffart; Elkjær Greenwood Ormerod, Monica Bettina; Johansen, Ingrid Torp; Djurovic, Srdjan; Ueland, Thor; Andreassen, Ole; Melle, Ingrid; Lagerberg, Trine Vik; Mørch-Johnsen, Lynn Egeland; Steen, Nils Eiel; Haukvik, Unn Kristin Hansen (Journal article; Peer reviewed, 2023)Background Impulsivity is a transdiagnostic feature linked to severe clinical expression and a potential target for psychopharmacological strategies. Biological underpinnings are largely unknown, but involvement of ... -
Increased circulating IL-18 levels in severe mental disorders indicate systemic inflammasome activation
Szabo, Attila; O'Connell, Kevin Sean; Ueland, Thor; Sheikh, Mashhood Ahmed; Agartz, Ingrid; Andreou, Dimitrios; Aukrust, Pål; Boye, Birgitte; Bøen, Erlend; Drange, Ole Kristian; Elvsåshagen, Torbjørn; Engh, John; Hope, Sigrun; Høegh, Margrethe Collier; Joa, Inge; Johnsen, Erik; Kroken, Rune Andreas; Lagerberg, Trine Vik; Lekva, Tove; Malt, Ulrik Fredrik; Melle, Ingrid; Morken, Gunnar; Nærland, Terje; Steen, Vidar Martin; Sørensen, Kjetil; Wedervang-Resell, Kirsten; Weibell, Melissa Anne Elin Authen; Westlye, Lars Tjelta; Steen, Nils Eiel; Andreassen, Ole; Djurovic, Srdjan (Journal article; Peer reviewed, 2022)Background Schizophrenia (SCZ) and bipolar disorder (BD) are severe mental illnesses (SMI) that are part of a psychosis continuum, and dysregulated innate immune responses have been suggested to be involved in their ... -
Indicated association between polygenic risk score and treatment-resistance in a naturalistic sample of patients with schizophrenia spectrum disorders
Werner, Maren Caroline Frogner; Wirgenes, Katrine Verena; Haram, Marit; Bettella, Francesco; Lunding, Synve Hoffart; Rødevand, Linn Nilsen; Hjell, Gabriela; Agartz, Ingrid; Djurovic, Srdjan; Melle, Ingrid; Andreassen, Ole Andreas; Steen, Nils Eiel (Journal article; Peer reviewed, 2020)Background One third of people diagnosed with schizophrenia fail to respond adequately to antipsychotic medication, resulting in persisting disabling symptoms, higher rates of hospitalization and higher costs for society. ... -
Inflammation and cognition in severe mental illness: patterns of covariation and subgroups
Sæther, Linn Sofie; Ueland, Thor; Haatveit, Beathe; Maglanoc, Luigi; Szabo, Attila; Djurovic, Srdjan; Aukrust, Pål; Roelfs, Daniël; Ormerod, Monica Bettina E. Greenwood; Lagerberg, Trine Vik; Steen, Nils Eiel; Melle, Ingrid; Andreassen, Ole; Ueland, Torill (Journal article; Peer reviewed, 2023)A potential relationship between dysregulation of immune/inflammatory pathways and cognitive impairment has been suggested in severe mental illnesses (SMI), such as schizophrenia (SZ) and bipolar (BD) spectrum disorders. ... -
Interleukin-18 signaling system links to agitation in severe mental disorders
Hjell, Gabriela; Szabo, Attila; Mørch-Johnsen, Lynn Egeland; Holst, Rene; Tesli, Natalia; Bell, Christina; Fischer-Vieler, Thomas; Werner, Maren Caroline Frogner; Lunding, Synve Hoffart; Ormerod, Monica Bettina E. Greenwood; Johansen, Ingrid Torp; Dieset, Ingrid; Djurovic, Srdjan; Melle, Ingrid; Ueland, Thor; Andreassen, Ole; Steen, Nils Eiel; Haukvik, Unn Kristin Hansen (Journal article; Peer reviewed, 2022)Objective Agitation is a challenging clinical feature in severe mental disorders, but its biological correlates are largely unknown. Inflammasome-related abnormalities have been linked to severe mental disorders and ... -
Lifetime Cannabis Use Is Not Associated With Negative Beliefs About Medication in Patients With First Treatment Psychosis
Gjerde, Priyanthi Borgen; Steen, Synne Wollen; Vedal, Trude Seselie Jahr; Steen, Nils Eiel; Reponen, Elina Johanna; Andreassen, Ole; Steen, Vidar Martin; Melle, Ingrid (Journal article; Peer reviewed, 2022)Objective: Cannabis use is common among patients with psychosis, and along with negative beliefs about medication, it has been found to predict poor adherence to antipsychotic drug treatment. Such lack of adherence to ... -
Limited association between infections, autoimmune disease and genetic risk and immune activation in severe mental disorders
Werner, Maren Caroline Frogner; Wirgenes, Katrine Verena; Shadrin, Alexey; Lunding, Synve Hoffart; Rødevand, Linn; Hjell, Gabriela; Ormerod, Monica; Haram, Marit; Agartz, Ingrid; Djurovic, Srdjan; Melle, Ingrid; Aukrust, Pål; Ueland, Thor; Andreassen, Ole; Steen, Nils Eiel (Journal article; Peer reviewed, 2022)Background Low-grade inflammation may be part of the underlying mechanism of schizophrenia and bipolar disorder. We investigated if genetic susceptibility, infections or autoimmunity could explain the immune activation. ... -
Lithium increases mitochondrial respiration in iPSC-derived neural precursor cells from lithium responders
Osete, Jordi Requena; Akkouh, Ibrahim; Reis de Assis, Denis; Szabo, Attila; Frei, Evgeniia; Hughes, Timothy; Smeland, Olav Bjerkehagen; Steen, Nils Eiel; Andreassen, Ole Andreas; Djurovic, Srdjan (Journal article; Peer reviewed, 2021)Lithium (Li), valproate (VPA) and lamotrigine (LTG) are commonly used to treat bipolar disorder (BD). While their clinical efficacy is well established, the mechanisms of action at the molecular level are still incompletely ... -
Lower circulating neuron-specific enolase concentrations in adults and adolescents with severe mental illness
Andreou, Dimitrios; Steen, Nils Eiel; Jørgensen, Kjetil Nordbø; Smelror, Runar Elle; Wedervang-Resell, Kirsten; Nerland, Stener; Westlye, Lars Tjelta; Nærland, Terje; Myhre, Anne Margrethe; Joa, Inge; Reitan, Solveig Merete Klæbo; Vaaler, Arne; Morken, Gunnar; Bøen, Erlend; Elvsåshagen, Torbjørn; Boye, Birgitte; Malt, Ulrik Fredrik; Aukrust, Pål; Skrede, Silje; Kroken, Rune Andreas; Johnsen, Erik; Djurovic, Srdjan; Andreassen, Ole; Ueland, Thor; Agartz, Ingrid (Journal article; Peer reviewed, 2021)Background: Both neurodegenerative and neurodevelopmental abnormalities have been suggested to be part of the etiopathology of severe mental illness (SMI). Neuron-specific enolase (NSE), mainly located in the neuronal ... -
Metabolic dysfunctions in the kynurenine pathway, noradrenergic and purine metabolism in schizophrenia and bipolar disorders
Steen, Nils Eiel; Dieset, Ingrid; Hope, Sigrun; Vedal, Trude Seselie Jahr; Smeland, Olav Bjerkehagen; Matson, Wayne; Kaddurah-Daouk, Rima; Agartz, Ingrid; Melle, Ingrid; Djurovic, Srdjan; Jönsson, Erik Gunnar; Bogdanov, Mikhail; Andreassen, Ole Andreas (Peer reviewed; Journal article, 2020)Background: We aimed at exploring potential pathophysiological processes across psychotic disorders, applying metabolomics in a large and well-characterized sample of patients and healthy controls. Methods: Patients with ... -
Patients with schizophrenia and bipolar disorder display a similar global gene expression signature in whole blood that reflects elevated proportion of immature neutrophil cells with association to lipid changes
Torsvik, Anja; Brattbakk, Hans-Richard; Trentani, Andrea; Holdhus, Rita; Stansberg, Christine; Bartz-Johannessen, Christoffer; Hughes, Timothy; Steen, Nils Eiel; Melle, Ingrid; Djurovic, Srdjan; Andreassen, Ole; Steen, Vidar Martin (Journal article; Peer reviewed, 2023)Schizophrenia (SCZ) and bipolar disorder (BD) share clinical characteristics, genetic susceptibility, and immune alterations. We aimed to identify differential transcriptional patterns in peripheral blood cells of patients ... -
Polygenic overlap and shared genetic loci between loneliness, severe mental disorders, and cardiovascular disease risk factors suggest shared molecular mechanisms
Rødevand, Linn; Bahrami, Shahram; Frei, Oleksandr; Lin, Aihua; Gani, Osman; Shadrin, Alexey A.; Smeland, Olav Bjerkehagen; O'Connell, Kevin; Elvsåshagen, Torbjørn; Winterton, Adriano; Quintana, Daniel; Hindley, Guy Frederick Lanyon; Werner, Maren Caroline Frogner; Djurovic, Srdjan; Dale, Anders Martin; Lagerberg, Trine Vik; Steen, Nils Eiel; Andreassen, Ole Andreas (Journal article; Peer reviewed, 2021)Clinical and epidemiological evidence suggest that loneliness is associated with severe mental disorders (SMDs) and increases the risk of cardiovascular disease (CVD). However, the mechanisms underlying the relationship ... -
Polygenic overlap with body-mass index improves prediction of treatment-resistant schizophrenia
O'Connell, Kevin Sean; Koch, Elise; Lenk, Hasan Cagin; Akkouh, Ibrahim Ahmed; Hindley, Guy Frederick Lanyon; Jaholkowski, Piotr Pawel; Smith, Robert Løvsletten; Holen, Børge; Shadrin, Alexey; Frei, Oleksandr; Smeland, Olav Bjerkehagen; Steen, Nils Eiel; Dale, Anders M; Molden, Espen; Djurovic, Srdjan; Andreassen, Ole (Journal article; Peer reviewed, 2023)Treatment resistant schizophrenia (TRS) is characterized by repeated treatment failure with antipsychotics. A recent genome-wide association study (GWAS) of TRS showed a polygenic architecture, but no significant loci were ... -
Prospective cohort study of early biosignatures of response to lithium in bipolar-I-disorders: overview of the H2020-funded R-LiNK initiative
Scott, Jan; Hidalgo-Mazzei, Diego; Strawbridge, Rebecca; Young, Allan; Resche-Rigon, Matthieu; Etain, Bruno; Andreassen, Ole Andreas; Bauer, Michael; Bennabi, Djamila; Blamire, Andrew M.; Boumezbeur, Fawzi; Brambilla, Paolo; Cattane, Nadia; Cattaneo, Annamaria; Chupin, Marie; Coello, Klara; Cointepas, Yann; Colom, Francesc; Cousins, David A.; Dubertret, Caroline; Duchesnay, Edouard; Ferro, Adele; Garcia-Estela, Aitana; Goikolea, Jose; Grigis, Antoine; Haffen, Emmanuel; Høegh, Margrethe Collier; Jakobsen, Petter; Kalman, Janos L.; Kessing, Lars V.; Klohn-Saghatolislam, Farah; Lagerberg, Trine Vik; Landén, Mikael; Lewitzka, Ute; Lutticke, Ashley; Mazer, Nicolas; Mazzelli, Monica; Mora, Cristina; Muller, Thorsten; Mur-Mila, Estanislao; Ødegaard, Ketil Joachim; Oltedal, Leif; Pålsson, Erik; Papadopoulos Orfanos, Dimitri; Papiol, Sergi; Perez-Sola, Victor; Reif, Andreas; Ritter, Philipp; Rossi, Roberto; Schulze, Thomas; Senner, Fanny; Smith, Fiona E.; Squarcina, Letizia; Steen, Nils Eiel; Thelwall, Pete E.; Varo, Cristina; Vieta, Eduard; Vinberg, Maj; Wessa, Michele; Westlye, Lars Tjelta; Bellivier, Frank (Peer reviewed; Journal article, 2019-09-25)Background Lithium is recommended as a first line treatment for bipolar disorders. However, only 30% of patients show an optimal outcome and variability in lithium response and tolerability is poorly understood. It remains ... -
Sex-Specific Effect of Serum Lipids and Body Mass Index on Psychotic Symptoms, a Cross-Sectional Study of First-Episode Psychosis Patients
Gjerde, Priyanthi Borgen; Simonsen, Carmen Elisabeth; Lagerberg, Trine V.; Steen, Nils Eiel; Andreassen, Ole A.; Steen, Vidar M.; Melle, Ingrid (Journal article; Peer reviewed, 2021)Background: Schizophrenia is a disorder with considerable heterogeneity in course and outcomes, which is in part related to the patients' sex. Studies report a link between serum lipids, body mass index (BMI), and therapeutic ... -
Systemic Cell Adhesion Molecules in Severe Mental Illness: Potential Role of Intercellular CAM-1 in Linking Peripheral and Neuroinflammation
Sheikh, Mashhood Ahmed; O'Connell, Kevin Sean; Lekva, Tove; Szabo, Attila; Akkouh, Ibrahim Ahmed; Osete, Jordi Requena; Agartz, Ingrid; Engh, John; Andreou, Dimitrios; Boye, Birgitte; Bøen, Erlend; Elvsåshagen, Torbjørn; Hope, Sigrun; Werner, Maren Caroline Frogner; Joa, Inge; Johnsen, Erik; Kroken, Rune Andreas; Lagerberg, Trine Vik; Melle, Ingrid; Drange, Ole Kristian; Morken, Gunnar; Nærland, Terje; Sørensen, Kjetil; Vaaler, Arne; Weibell, Melissa Anne Elin Authen; Westlye, Lars Tjelta; Aukrust, Pål; Djurovic, Srdjan; Steen, Nils Eiel; Andreassen, Ole; Ueland, Thor (Journal article; Peer reviewed, 2022)Background: Cell adhesion molecules (CAMs) orchestrate leukocyte trafficking and could link peripheral and neuroinflammation in patients with severe mental illness (SMI), by promoting inflammatory and immune-mediated ...