Blar i Bergen Open Research Archive på forfatter "Haavik, Jan"

Viser treff 21-40 av 93

    • Changes in Tryptophan-Kynurenine Metabolism in Patients with Depression Undergoing ECT-A Systematic Review 

      Aarsland, Tore Ivar Malmei; Instanes, Johanne Telnes; Posserud, Maj-Britt Rocio; Ulvik, Arve; Kessler, Ute; Haavik, Jan (Journal article; Peer reviewed, 2022)
      The kynurenine pathway of tryptophan (Trp) metabolism generates multiple biologically active metabolites (kynurenines) that have been implicated in neuropsychiatric disorders. It has been suggested that modulation of ...

    • Common psychiatric and metabolic comorbidity of adult attention-deficit/hyperactivity disorder: A population-based cross-sectional study 

      Chen, Qi; Hartman, Catharina A; Haavik, Jan; Harro, Jaanus; Klungsøyr, Kari; Hegvik, Tor-Arne; Wanders, Rob; Ottosen, Cæcilie; Dalsgaard, Søren; Faraone, Stephen V.; Larsson, Henrik (Peer reviewed; Journal article, 2018-09-26)
      Attention-deficit/hyperactivity disorder (ADHD) is often comorbid with other psychiatric conditions in adults. Yet, less is known about its relationship with common metabolic disorders and how sex and ageing affect the ...

    • 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 ...

    • Consortium neuroscience of attention deficit/hyperactivity disorder and autism spectrum disorder: The ENIGMA adventure 

      Hoogman, Martine; Van Rooij, Daan; Klein, Marieke; Boedhoe, Premika; Ilioska, Iva; Li, Ting; Patel, Yash; Postema, Merel C.; Zhang-James, Yanli; Anagnostou, Evdokia; Arango, Celso; Auzias, Guillaume; Banaschewski, Tobias; Bau, Claiton H.D.; Behrmann, Marlene; Bellgrove, Mark A.; Brandeis, Daniel; Brem, Silvia; Busatto, Geraldo F.; Calderoni, Sara; Calvo, Rosa; Castellanos, Francisco X.; Coghill, David; Conzelmann, Annette; Daly, Eileen; Deruelle, Christine; Dinstein, Ilan; Durston, Sarah; Ecker, Christine; Ehrlich, Stefan; Epstein, Jeffery N.; Fair, Damien A.; Fitzgerald, Jacqueline; Freitag, Christine; Frodl, Thomas; Gallagher, Louise; Grevet, Eugenio H.; Haavik, Jan; Hoekstra, Pieter J.; Janssen, Joost; Karkashadze, George A.; King, Joseph A.; Konrad, Kerstin; Kuntsi, Jonna; Lazaro, Luisa; Lerch, Jason P.; Lesch, Klaus-Peter; Louza, Mario R.; Luna, Beatriz; Mattos, Paulo; McGrath, Jane; Muratori, Filippo; Murphy, Clodagh; Nigg, Joel T.; Oberwelland Weiss, Eileen; O'Gorman Tuura, Ruth L.; O'Hearn, Kirsten; Oosterlaan, Jaap; Parellada, Mara; Pauli, Paul; Plessen, Kerstin von; Ramos-Quiroga, Josep Antoni; Reif, Andreas; Reneman, Liesbeth; Retico, Alessandra; Rosa, Pedro G.; Rubia, Katya; Shaw, Philip; Silk, Tim J.; Tamm, Leanne; Vilarroya, Oscar; Walitza, Susanne; Jahanshad, Neda; Faraone, Stephen V.; Francks, Clyde; van den Heuvel, Odile A.; Paus, Tomáš; Thompson, Paul M.; Buitelaar, Jan; Franke, Barbara (Journal article; Peer reviewed, 2020)
      Neuroimaging has been extensively used to study brain structure and function in individuals with attention deficit/hyperactivity disorder (ADHD) and autism spectrum disorder (ASD) over the past decades. Two of the main ...

    • Current and Retrospective Childhood Ratings of Emotional Fluctuations in Adults With ADHD 

      Lundervold, Astri J.; Halmøy, Anne; Nordby, Emilie Sektnan; Haavik, Jan; Meza, Jocelyn I. (Journal article; Peer reviewed, 2020)
      Introduction: Emotional fluctuations and mood swings are common among adults with Attention Deficit/Hyperactivity Disorder (ADHD). Here we investigated if these problems could be retrospectively traced back to childhood ...

    • Cyclothymic temperament: Associations with ADHD, other psychopathology, and medical morbidity in the general population 

      Syrstad, Vigdis Elin Giæver; Ødegaard, Ketil Joachim; Fasmer, Ole Bernt; Halmøy, Anne; Haavik, Jan; Dilsaver, Stephen C.; Gjestad, Rolf (Peer reviewed; Journal article, 2020)
      Background: Cyclothymic temperament (CT) is an affective disposition often preceding bipolar disorder (BD), and is the most common affective temperament in patients with BD. In depressed patients, CT is a predictor for ...

    • 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. ...

    • Deficit of homozygosity among 1.52 million individuals and genetic causes of recessive lethality 

      Oddsson, Asmundur; Sulem, Patrick; Sveinbjornsson, Gardar; Arnadottir, Gudny A.; Steinthorsdottir, Valgerdur; Halldorsson, Gisli H.; Atlason, Bjarni A.; Oskarsson, Gudjon R.; Helgason, Hannes; Nielsen, Henriette Svarre; Westergaard, David; Karjalainen, Juha; Katrinardottir, Hildigunnur; Fridriksdottir, Run; Jensson, Brynjar O.; Tragante, Vinicius; Ferkingstad, Egil; Jónsson, Hákon; Gudjonsson, Sigurjon A.; Beyter, Doruk; Moore, Kristjan H.S.; Thordardottir, Helga B.; Kristmundsdottir, Snædis; Stefansson, Olafur A.; Rantapää Dahlqvist, Solbritt; Sonderby, Ida Elken; Didriksen, Maria; Stridh, Pernilla; Haavik, Jan; Tryggvadottir, Laufey; Frei, Oleksandr; Walters, G. Bragi; Kockum, Ingrid; Hjalgrim, Henrik; Olafsdottir, Thorunn A; Selbæk, Geir; Nyegaard, Mette; Erikstrup, Christian; Brodersen, Thorsten; Sævarsdottir, Sædis; Olsson, Tomas; Nielsen, Kaspar Rene; Haraldsson, Àsgeir; Bruun, Mie Topholm; Hansen, Thomas Folkmann; Steingrimsdottir, Thora; Jacobsen, Rikke Louise; Lie, Rolv T.; Djurovic, Srdjan; Alfredsson, Lars; Portilla, A.L.; Brunak, Søren; Havdahl, Alexandra; Andreassen, Ole (Journal article; Peer reviewed, 2023)
      Genotypes causing pregnancy loss and perinatal mortality are depleted among living individuals and are therefore difficult to find. To explore genetic causes of recessive lethality, we searched for sequence variants with ...

    • Diet quality, stress and common mental health problems: A cohort study of 121,008 adults 

      Schweren, Lizanne J.S.; Larsson, Henrik; Vinke, Petra C.; Li, Lin; Kvalvik, Liv Grimstvedt; Arias-Vasquez, Alejandro; Haavik, Jan; Hartman, Catharina A. (Journal article; Peer reviewed, 2021)
      Background & aims Overall diet quality may partially mediate the detrimental effects of stress and neuroticism on common mental health problems: stressed and/or neurotic individuals may be more prone to unhealthy dietary ...

    • Diet, Physical Activity, and Disinhibition in Middle-Aged and Older Adults: A UK Biobank Study 

      Schweren, Lizanne J.S.; van Rooij, Daan; Shi, Huiqing; Larsson, Henrik; Arias-Vasquez, Alejandro; Li, Lin; Kvalvik, Liv Grimstvedt; Haavik, Jan; Buitelaar, Jan; Hartman, Catharina (Journal article; Peer reviewed, 2021)
      Disinhibition is a prominent feature of multiple psychiatric disorders, and has been associated with poor long-term somatic outcomes. Modifiable lifestyle factors including diet and moderate-to-vigorous physical activity ...

    • Discovery and biological characterization of a novel scaffold for potent inhibitors of peripheral serotonin synthesis 

      Betari, Nibal; Sahlholm, Kristoffer; Ishizuka, Yuta; Teigen, Knut; Haavik, Jan (Journal article; Peer reviewed, 2020)
      Aim: Tryptophan hydroxylase 1 (TPH1) catalyzes serotonin synthesis in peripheral tissues. Selective TPH1 inhibitors may be useful for treating disorders related to serotonin dysregulation. Results & methodology: Screening ...

    • Do Poor Diet and Lifestyle Behaviors Modify the Genetic Susceptibility to Impulsivity in the General Population? 

      Xie, Tian; Schweren, Lizanne J.S.; Larsson, Henrik; Li, Lin; Rietz, Ebba Du; Haavik, Jan; Kvalvik, Liv Grimstvedt; Solberg, Berit Skretting; Klungsøyr, Kari; Snieder, Harold; Hartman, Catharina A. (Journal article; Peer reviewed, 2023-03-27)
      The present study investigated whether an unhealthy diet and other lifestyle behaviors may modify the genetic susceptibility to impulsivity. A total of 33,047 participants (mean age = 42.1 years, 59.8% females) from the ...

    • Druggable genome in attention deficit/hyperactivity disorder and its co-morbid conditions. New avenues for treatment. 

      Hegvik, Tor-Arne; Waløen, Kai; Pandey, Sunil Kumar; Faraone, Stephen V.; Haavik, Jan; Zayats, Tetyana (Peer reviewed; Journal article, 2019)
      Attention-Deficit/Hyperactivity Disorder (ADHD) is a common neurodevelopmental disorder with only symptomatic care available. Genome-wide association (GWA) studies can provide a starting point in the search for novel drug ...

    • The effect of electroconvulsive therapy (ECT) on serum kynurenine pathway metabolites in late-life depression 

      Aarsland, Tore Ivar Malmei; Haavik, Jan; Ulvik, Arve; Ueland, Per Magne; Dols, Annemiek; Kessler, Ute (Journal article; Peer reviewed, 2023)
      Background Depression is reportedly associated with alterations in kynurenine pathway metabolites (kynurenines). Several kynurenines are involved in glutamate signaling, and some have potentially neurotoxic effects while ...

    • The effect of electroconvulsive therapy (ECT) on serum tryptophan metabolites 

      Aarsland, Tore Ivar Malmei; Leskauskaite, Ieva; Midttun, Øivind; Ulvik, Arve; Ueland, Per Magne; Oltedal, Leif; Erchinger, Vera Jane; Ødegaard, Ketil Joachim; Haavik, Jan; Kessler, Ute (Peer reviewed; Journal article, 2019-05-31)
      Background: Prior studies suggest that activation of the tryptophan catabolism via the kynurenine pathway by proinflammatory cytokines may be involved in the pathophysiology of depression. Electroconvulsive therapy (ECT) ...

    • Effects of copy number variations on brain structure and risk for psychiatric illness: Large-scale studies from the ENIGMA working groups on CNVs 

      Sønderby, Ida Elken; Ching, Christopher R. K.; Thomopoulos, Sophia I.; van der Meer, Dennis; Sun, Daqiang; Villalon-Reina, Julio E.; Agartz, Ingrid; Amunts, Katrin; Arango, Celso; Armstrong, Nicola J.; Ayesa-Arriola, Rosa; Bakker, Geor; Bassett, Anne S.; Boomsma, Dorret I.; Bulow, Robin; Butcher, Nancy J.; Calhoun, Vince D.; Caspers, Svenja; Chow, Eva W. C.; Cichon, Sven; Ciufolini, Simone; Craig, Michael C.; Crespo-Facorro, Benedicto; Cunningham, Adam C.; Dale, Anders M.; Dazzan, Paola; de Zubicaray, Greig I.; Djurovic, Srdjan; Doherty, Joanne L.; Donohoe, Gary; Draganski, Bogdan; Durdle, Courtney A.; Ehrlich, Stefan; Emanuel, Beverly S.; Espeseth, Thomas; Fisher, Simon E.; Ge, Tian; Glahn, David C.; Grabe, Hans J.; Gur, Raquel E.; Gutman, Boris A.; Lundervold, Astri J.; Haavik, Jan; Håberg, Asta; Hansen, Laura A.; Moberget, Torgeir; Sánchez, Jennifer Monereo; Reinbold, Céline Sonja; Tamnes, Christian Krog; Westlye, Lars Tjelta; Andreassen, Ole; et al., , (Journal article; Peer reviewed, 2022)
      The Enhancing NeuroImaging Genetics through Meta-Analysis copy number variant (ENIGMA-CNV) and 22q11.2 Deletion Syndrome Working Groups (22q-ENIGMA WGs) were created to gain insight into the involvement of genetic factors ...

    • Effects of ECT in treatment of depression: Study protocol for a prospective neuroradiological study of acute and longitudinal effects on brain structure and function 

      Oltedal, Leif; Kessler, Ute; Ersland, Lars; Grüner, Renate; Andreassen, Ole Andreas; Haavik, Jan; Hoff, Per Ivar; Hammar, Åsa; Dale, Anders Martin; Hugdahl, Kenneth; Ødegaard, Ketil Joachim (Peer reviewed; Journal article, 2015-05-01)
      Background Major depression can be a serious and debilitating condition. For some patients in a treatment resistant depressive episode, electroconvulsive treatment (ECT) is the only treatment that is effective. Although ...

    • The effects of phenylalanine and tyrosine levels on dopamine production in rat PC12 cells. Implications for treatment of phenylketonuria, tyrosinemia type 1 and comorbid neurodevelopmental disorders 

      Szigetvari, Peter Daniel; Patil, Sudarshan; Birkeland, Even; Kleppe, Rune; Haavik, Jan (Journal article; Peer reviewed, 2023)
      Phenylketonuria (PKU) is an autosomal recessive metabolic disorder caused by mutations in the phenylalanine hydroxylase (PAH) gene, resulting in phenylalanine accumulation and impaired tyrosine production. In Tyrosinemia ...

    • Electroconvulsive therapy triggers a reversible decrease in brain N-acetylaspartate 

      Erchinger, Vera Jane; Craven, Alexander R.; Ersland, Lars; Oedegaard, Ketil J.; Bartz-Johannessen, Christoffer; Hammar, Åsa Karin; Haavik, Jan; Riemer, Frank; Kessler, Ute; Oltedal, Leif (Journal article; Peer reviewed, 2023)
      Introduction: Based on previous research on electroconvulsive therapy (ECT) we have proposed a model where disruption, potentiation, and rewiring of brain networks occur in sequence and serve as the underlying therapeutic ...

    • Elevated body weight modulates subcortical volume change and associated clinical response following electroconvulsive therapy 

      Opel, Nils; Narr, Katherine L; Abbott, Christopher; Argyelan, Miklos; Espinoza, Randall; Emsell, Louise; Bouckaert, Filip; Sienaert, Pascal; Vandenbulcke, Mathieu; Nordanskog, Pia; Repple, Jonathan; Kavakbasi, Erhan; Jorgensen, Martin B.; Paulson, Olaf B.; Hanson, Lars G.; Dols, Annemieke; van Exel, Eric; Oudega, Mardien L.; Takamiya, Akihiro; Kishimoto, Taishiro; Ousdal, Olga Therese; Haavik, Jan; Hammar, Åsa Karin; Ødegaard, Ketil Joachim; Kessler, Ute; Bartsch, Hauke; Dale, Anders M.; Baune, Bernhard T; Dannlowski, Udo; Oltedal, Leif; Redlich, Ronny (Journal article; Peer reviewed, 2021)
      Background: Obesity is a frequent somatic comorbidity of major depression, and it has been associated with worse clinical outcomes and brain structural abnormalities. Converging evidence suggests that electroconvulsive ...