Blar i Department of Biomedicine på forfatter "Haavik, Jan"

Viser treff 21-40 av 62

    • 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 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) ...

    • 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 ...

    • 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 ...

    • Epistatic and gene wide effects in YWHA and aromatic amino hydroxylase genes across ADHD and other common neuropsychiatric disorders: Association with YWHAE 

      Jacobsen, Kaya Kvarme; Kleppe, Rune; Johansson, Stefan; Zayats, Tetyana; Haavik, Jan (Peer reviewed; Journal article, 2015-09)
      Monoamines critically modulate neurophysiological functions affected in several neuropsychiatric disorders. We therefore examined genes encoding key enzymes of catecholamine and serotonin biosynthesis (tyrosine and tryptophan ...

    • Event-related-potential (ERP) correlates of performance monitoring in adults with attention-deficit hyperactivity disorder (ADHD) 

      Marquardt, Lynn Anne; Eichele, Heike; Lundervold, Astri; Haavik, Jan; Eichele, Tom (Peer reviewed; Journal article, 2018-04-11)
      Introduction: Attention-deficit hyperactivity disorder (ADHD) is one of the most frequent neurodevelopmental disorders in children and tends to persist into adulthood. Evidence from neuropsychological, neuroimaging, and ...

    • Evidence for similar structural brain anomalies in youth and adult attention-deficit/hyperactivity disorder: a machine learning analysis 

      Zhang-James, Yanli; Helminen, Emily C.; Liu, Jinru; Busatto, Geraldo F.; Calvo, Anna; Cercignani, Mara; Chaim-Avancini, Tiffany M.; Gabel, Matt C.; Harrison, Neil A.; Lazaro, Luisa; Lera-Miguel, Sara; Louza, Mario R.; Nicolau, Rosa; Rosa, Pedro G.; Schulte-Rutte, Martin; Zanetti, Marcus V.; Ambrosino, Sara; Asherson, Philip; Banaschewski, Tobias; Baranov, Alexandr; Baumeister, Sarah; Baur-Streubel, Ramona; Bellgrove, Mark A.; Biederman, Joseph; Bralten, Janita; Bramati, Ivanei; Brandeis, Daniel; Brem, Silvia; Buitelaar, Jan K.; Castellanos, Francisco X.; Chantiluke, Kaylita C.; Christakou, Anastasia; Coghill, David; Conzelmann, Annette; Cubillo, Ana; Dale, Anders M.; de Zeeuw, Patrick; Doyle, Alysa E.; Durston, Sarah; Earl, Eric A.; Epstein, Jeffery N.; Ethofer, Thomas; Fair, Damien A.; Fallgatter, Andreas J.; Frodl, Thomas; Gogberashvili, Tinatin; Haavik, Jan; Hartman, Catharina A.; Heslenfeld, Dirk J.; Hoekstra, Pieter J.; Hohmann, Sarah; Høvik, Marie Farstad; Jahanshad, Neda; Jernigan, Terry L.; Kardatzki, Bernd; Karkashadze, George A.; Kelly, Clare; Kohls, Gregor; Konrad, Kerstin; Kuntsi, Jonna; Lesch, Klaus-Peter; Lundervold, Astri J.; Malpas, Charles B.; Mattos, Paulo; McCarthy, Hazel; Mehta, Mitul A.; Namazova-Baranova, Leyla; Nigg, Joel T.; Novotny, Stephanie E.; O’Gorman Tuura, Ruth L.; Weiss, Eileen Oberwelland; Oosterlaan, Jaap; Oranje, Bob; Paloyelis, Yannis; Pauli, Paul; Plessen, Kerstin J.; Ramos-Quiroga, Josep Antoni; Reif, Andreas; Reneman, Liesbeth; Rubia, Katya; Schrantee, Anouk; Schwarz, Lena; Schweren, Lizanne J.S.; Seitz, Jochen; Shaw, Philip; Silk, Tim J.; Skokauskas, Norbert; Vila, Juan Carlos Soliva; Stevens, Michael C.; Sudre, Gustavo; Tamm, Leanne; Thompson, Paul M.; Tovar-Moll, Fernanda; van Erp, Theo G.M.; Vance, Alasdair; Vilarroya, Oscar; Vives-Gilabert, Yolanda; von Polier, Georg G.; Walitza, Susanne; Yoncheva, Yuliya N.; Ziegler, Georg C.; Franke, Barbara; Hoogman, Martine; Faraone, Stephen (Journal article; Peer reviewed, 2021)
      Attention-deficit/hyperactivity disorder (ADHD) affects 5% of children world-wide. Of these, two-thirds continue to have impairing symptoms of ADHD into adulthood. Although a large literature implicates structural brain ...

    • Expanding the toolbox of ADHD genetics. How can we make sense of parent of origin effects in ADHD and related behavioral phenotypes? 

      Zayats, Tetyana; Johansson, Stefan; Haavik, Jan (Peer reviewed; Journal article, 2015-10-16)
      Genome-wide association (GWA) studies have shown that many different genetic variants cumulatively contribute to the risk of psychiatric disorders. It has also been demonstrated that various parent-of-origin effects (POE) ...

    • Familial co-aggregation of attention-deficit/ hyperactivity disorder and autoimmune diseases: a cohort study based on Swedish population-wide registers 

      Hegvik, Tor-Arne; Chen, Qi; Kuja-Halkola, Ralf; Klungsøyr, Kari; Butwicka, Agnieszka; Lichtenstein, Paul; Almqvist, Catarina; Faraone, Stephen V.; Haavik, Jan; Larsson, Henrik (Journal article; Peer reviewed, 2021)
      Background Attention-deficit/hyperactivity disorder (ADHD) has been associated with several autoimmune diseases (AD), both within individuals and across relatives, implying common underlying genetic or environmental factors ...

    • Functional studies of tyrosine hydroxylase missense variants reveal distinct patterns of molecular defects in dopa-responsive dystonia 

      Fossbakk, Agnete; Kleppe, Rune; Knappskog, Per; Martinez, Aurora; Haavik, Jan (Peer reviewed; Journal article, 2014-06-03)
      Congenital tyrosine hydroxylase deficiency (THD) is found in autosomal-recessive Dopa-responsive dystonia and related neurological syndromes. The clinical manifestations of THD are variable, ranging from early-onset lethal ...

    • GADL1 is a multifunctional decarboxylase with tissue-specific roles in β-alanine and carnosine production 

      Mahootchi, Elaheh; Homaei, Selina Cannon; Kleppe, Rune; Winge, Ingeborg; Hegvik, Tor-Arne; Perez, Roberto Megias; Totland, Christian; Mogavero, Floriana; Baumann, Anne; Glennon, Jeffrey Colm; Miletic, Hrvoje; Kursula, Petri; Haavik, Jan (Journal article; Peer reviewed, 2020)
      Carnosine and related β-alanine–containing peptides are believed to be important antioxidants, pH buffers, and neuromodulators. However, their biosynthetic routes and therapeutic potential are still being debated. This ...

    • Gender Differences in Psychiatric Comorbidity: Population-based study of 40,000 Adults with Attention-Deficit Hyperactivity Disorder 

      Solberg, Berit Skretting; Halmøy, Anne; Engeland, Anders; Igland, Jannicke; Haavik, Jan; Klungsøyr, Kari (Peer reviewed; Journal article, 2017-12-21)
      OBJECTIVE: We aimed at determining whether gender modified associations between ADHD and psychiatric comorbidities in adults. METHOD: We identified adults with ADHD by linking Norwegian national registries and compared ...

    • Gene-Environment Interactions in Attention-Deficit/Hyperactivity Disorder Symptom Dimensions: The Role of Unhealthy Food Habits 

      Li, Lin; Taylor, Mark J; Bälter, Katarina; xie, tian; Solberg, Berit Skretting; Haavik, Jan; Arias-Vásquez, Alejandro; Hartman, Catharina A; Larsson, Henrik (Journal article; Peer reviewed, 2021)
      Background: Dietary habits were investigated as environmental risk factors for Attention-Deficit/Hyperactivity Disorder (ADHD). However, no previous studies explored the effects of dietary factors on modifying the role of ...

    • Genetic association study of childhood aggression across raters, instruments, and age 

      Ip, Hill F.; van der Laan, Camiel M.; Krapohl, Eva M. L.; Brikell, Isabell; Sánchez-Mora, Cristina; Nolte, Ilja M.; Pourcain, Beate St; Bolhuis, Koen; Palviainen, Teemu; Zafarmand, Hadi; Colodro-Conde, Lucía; Gordon, Scott; Zayats, Tetyana; Aliev, Fazil; Jiang, Chang; Wang, Carol A.; Saunders, Gretchen; Karhunen, Ville; Hammerschlag, Anke R.; Adkins, Daniel E.; Border, Richard; Peterson, Roseann E.; Prinz, Joseph A.; Thiering, Elisabeth; Seppälä, Iikka; Vilor-Tejedor, Natàlia; Ahluwalia, Tarunveer S.; Day, Felix R.; Hottenga, Jouke-Jan; Allegrini, Andrea G.; Rimfeld, Kaili; Chen, Qi; Yi, Lu; Martin, Joanna; Soler Artigas, Marìa; Rovira, Paula; Bosch, Rosa; Español, Gemma; Ramos-Quiroga, Josep Antonio; Neumann, Alexander; Haavik, Jan; Harris, Jennifer Ruth; Helgeland, Øyvind; Johansson, Stefan; Knudsen, Gun Peggy Strømstad; Njølstad, Pål Rasmus; Havdahl, Alexandra; Magnus, Per Minor; Reichborn-Kjennerud, Ted; Boomsma, Dorret I. (Journal article; Peer reviewed, 2021)
      Childhood aggressive behavior (AGG) has a substantial heritability of around 50%. Here we present a genome-wide association meta-analysis (GWAMA) of childhood AGG, in which all phenotype measures across childhood ages from ...

    • Genome Guided Personalized Drug Therapy in Attention Deficit Hyperactivity Disorder 

      Haavik, Jan (Journal article; Peer reviewed, 2022)
      ADHD is a common behavioral syndrome with a heritability of 70–80%. Genome wide sequencing and association studies indicate that ADHD risk variants are distributed across a wide range of allele frequencies and relative ...

    • Genome wide association study identifies variants in NBEA associated with migraine in bipolar disorder 

      Jacobsen, Kaya Kvarme; Nievergelt, Caroline M.; Zayats, Tetyana; Greenwood, Tifany A.; Anttila, Verneri; Akiskal, Hagop Souren; Haavik, Jan; Fasmer, Ole Bernt; Kelsoe, John R.; Johansson, Stefan; Ødegaard, Ketil Joachim (Peer reviewed; Journal article, 2015-10-12)
      Background. Migraine is a common comorbidity among individuals with bipolar disorder, but the underlying mechanisms for this co-occurrence are poorly understood. The aim of this study was to investigate the genetic background ...

    • Genome-wide analysis of attention deficit hyperactivity disorder in Norway 

      Zayats, Tetyana; Athanasiu, Lavinia; Sønderby, Ida Elken; Djurovic, Srdjan; Westlye, Lars Tjelta; Tamnes, Christian Krog; Fladby, Tormod; Aase, Heidi; Zeiner, Pål; Reichborn-Kjennerud, Ted; Knappskog, Per; Knudsen, Gun Peggy; Andreassen, Ole Andreas; Johansson, Stefan; Haavik, Jan (Peer reviewed; Journal article, 2015-04-13)
      Background Attention deficit hyperactivity disorder (ADHD) is a highly heritable neuropsychiatric condition, but it has been difficult to identify genes underlying this disorder. This study aimed to explore genetics of ...

    • Implication of the APP gene in intellectual abilities 

      Myrum, Craig; Nikolaienko, Oleksii; Bramham, Clive R.; Haavik, Jan; Zayats, Tetyana (Peer reviewed; Journal article, 2017)
      Background: Cognitive functions are highly heritable and polygenic, though the source of this genetic influence is unclear. On the neurobiological level, these functions rely on effective neuroplasticity, in which the ...

    • Inhibition of Tryptophan Hydroxylases and Monoamine Oxidase-A by the Proton Pump Inhibitor, Omeprazole—In Vitro and In Vivo Investigations 

      Betari, Nibal; Sahlholm, Kristoffer; Morató, Xavier; Godoy-Marín, Héctor; Jáuregui, Olga; Teigen, Knut; Ciruela, Francisco; Haavik, Jan (Journal article; Peer reviewed, 2020)
      Serotonin (5-HT) is a hormone and neurotransmitter that modulates neural activity as well as a wide range of other physiological processes including cardiovascular function, bowel motility, and platelet aggregation. 5-HT ...

    • Insulinopathies of the brain? Genetic overlap between somatic insulin-related and neuropsychiatric disorders 

      Fanelli, Giuseppe; Franke, Barbara; De Witte, Ward; Ruisch, I. Hyun; Haavik, Jan; van Gils, Veerle; Jansen, Willemijn J.; Vos, Stephanie J. B.; Lind, Lars; Buitelaar, Jan K.; Banaschewski, Tobias; Dalsgaard, Søren; Serretti, Alessandro; Mota, Nina Roth; Poelmans, Geert; Bralten, Janita (Journal article; Peer reviewed, 2022)
      The prevalence of somatic insulinopathies, like metabolic syndrome (MetS), obesity, and type 2 diabetes mellitus (T2DM), is higher in Alzheimer’s disease (AD), autism spectrum disorder (ASD), and obsessive-compulsive ...