V
Viktoria Johansson
Researcher at Karolinska Institutet
Publications - 20
Citations - 432
Viktoria Johansson is an academic researcher from Karolinska Institutet. The author has contributed to research in topics: Bipolar disorder & Schizophrenia. The author has an hindex of 9, co-authored 19 publications receiving 261 citations. Previous affiliations of Viktoria Johansson include Stockholm County Council.
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Journal ArticleDOI
The Association Between Familial Risk and Brain Abnormalities Is Disease Specific: An ENIGMA-Relatives Study of Schizophrenia and Bipolar Disorder
Sonja M C de Zwarte,Rachel M. Brouwer,Ingrid Agartz,Ingrid Agartz,Martin Alda,Martin Alda,André Aleman,Kathryn I. Alpert,Carrie E. Bearden,Alessandro Bertolino,Catherine Bois,Aurora Bonvino,Elvira Bramon,Elizabeth E.L. Buimer,Wiepke Cahn,Dara M. Cannon,Tyrone D. Cannon,Xavier Caseras,Josefina Castro-Fornieles,Qiang Chen,Yoonho Chung,Elena de la Serna,Annabella Di Giorgio,Gaelle E. Doucet,M.C. Eker,M.C. Eker,Susanne Erk,Scott C. Fears,Sonya Foley,Sophia Frangou,Andrew Frankland,Janice M. Fullerton,Janice M. Fullerton,David C. Glahn,Vina M. Goghari,Aaron Goldman,Ali Saffet Gonul,Ali Saffet Gonul,Oliver Gruber,Lieuwe de Haan,Tomas Hajek,Tomas Hajek,Emma L. Hawkins,Andreas Heinz,Manon H.J. Hillegers,Hilleke E. Hulshoff Pol,Christina M. Hultman,Martin Ingvar,Viktoria Johansson,Erik G. Jönsson,Erik G. Jönsson,Fergus Kane,Matthew J. Kempton,Marinka M.G. Koenis,Miloslav Kopecek,Miloslav Kopecek,Lydia Krabbendam,Bernd Kramer,Stephen M. Lawrie,Rhoshel K. Lenroot,Rhoshel K. Lenroot,Machteld Marcelis,Jan-Bernard C Marsman,Venkata S. Mattay,Colm McDonald,Andreas Meyer-Lindenberg,Stijn Michielse,Philip B. Mitchell,Dolores Moreno,Robin M. Murray,Benson Mwangi,Pablo Najt,Emma Neilson,Jason Newport,Jim van Os,Bronwyn Overs,Ayşegül Özerdem,Ayşegül Özerdem,Marco Picchioni,Anja Richter,Gloria Roberts,Aybala Saricicek Aydogan,Aybala Saricicek Aydogan,Peter R. Schofield,Peter R. Schofield,Fatma Simsek,Fatma Simsek,Jair C. Soares,Gisela Sugranyes,Timothea Toulopoulou,Timothea Toulopoulou,Timothea Toulopoulou,Giulia Tronchin,Henrik Walter,Lei Wang,Daniel R. Weinberger,Heather C. Whalley,Nefize Yalin,Ole A. Andreassen,Christopher R.K. Ching,Christopher R.K. Ching,Theo G.M. van Erp,Jessica A. Turner,Neda Jahanshad,Paul M. Thompson,René S. Kahn,René S. Kahn,Neeltje E.M. van Haren +107 more
TL;DR: Despite shared genetic liability, first-degree relatives of patients with schizophrenia and bipolar disorder show a differential pattern of structural brain abnormalities, specifically a divergent effect in ICV, which may imply that the neurodevelopmental trajectories leading to brain anomalies in schizophrenia or bipolar disorder are distinct.
Journal ArticleDOI
A population-based heritability estimate of bipolar disorder - In a Swedish twin sample.
Viktoria Johansson,Viktoria Johansson,Ralf Kuja-Halkola,Tyrone D. Cannon,Christina M. Hultman,Anna Hedman +5 more
TL;DR: An updated statistical methodology for heritability estimation in BPD is used by taking available time of follow-up into account while controlling for co-variates, demonstrating a robust 60% heritability for BPD with no evidence of sex-specific genetic effects on disease liability.
Journal ArticleDOI
DNA methylation meta-analysis reveals cellular alterations in psychosis and markers of treatment-resistant schizophrenia
Eilis Hannon,Emma Dempster,Georgina Mansell,Joe Burrage,Nick Bass,Marc M. Bohlken,Aiden Corvin,Charles Curtis,Charles Curtis,David Dempster,Marta Di Forti,Marta Di Forti,Marta Di Forti,Timothy G. Dinan,Gary Donohoe,Fiona Gaughran,Fiona Gaughran,Michael Gill,Amy Gillespie,Amy Gillespie,Cerisse Gunasinghe,Hilleke E Hulshoff,Christina M. Hultman,Viktoria Johansson,René S. Kahn,René S. Kahn,Jaakko Kaprio,Gunter Kenis,Kaarina Kowalec,Kaarina Kowalec,James H. MacCabe,Colm McDonald,Andrew McQuillin,Derek W. Morris,Kieran C. Murphy,Colette J Mustard,Igor Nenadic,Michael Conlon O'Donovan,Diego Quattrone,Diego Quattrone,Alexander Richards,Bart P. F. Rutten,David St Clair,Sebastian Therman,Timothea Toulopoulou,Jim van Os,John L. Waddington,Patrick F. Sullivan,Patrick F. Sullivan,Evangelos Vassos,Gerome Breen,Gerome Breen,David A. Collier,Robin M. Murray,Leonard S. Schalkwyk,Jonathan Mill +55 more
TL;DR: This article performed a systematic analysis of blood DNA methylation profiles from 4,483 participants from seven independent cohorts identifying differentially methylated positions (DMPs) associated with psychosis, schizophrenia and treatment-resistant schizophrenia.
Journal ArticleDOI
Multiple sclerosis and psychiatric disorders : comorbidity and sibling risk in a nationwide Swedish cohort
Viktoria Johansson,Cecilia Lundholm,Jan Hillert,Thomas Masterman,Paul Lichtenstein,Mikael Landén,Christina M. Hultman +6 more
TL;DR: A strong positive association between MS and bipolar disorder and depression that could not be explained by genetic liability is found and might be spurious or indicate possible protective mechanisms that warrant further exploration.
Journal ArticleDOI
Depression, anxiety, and antidepressant treatment in women: association with in vitro fertilization outcome.
Carolyn E. Cesta,Alexander Viktorin,Henrik Olsson,Viktoria Johansson,Arvid Sjölander,Christina Bergh,Alikistis Skalkidou,Karl-Gösta Nygren,Sven Cnattingius,Anastasia Iliadou +9 more
TL;DR: A diagnosis of depression/anxiety and/or treatment with antidepressants before IVF was associated with slightly reduced odds of pregnancy and live birth, implying that the underlying disorder is important for the observed association.