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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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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, +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.
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A population-based heritability estimate of bipolar disorder - In a Swedish twin sample.

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.
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DNA methylation meta-analysis reveals cellular alterations in psychosis and markers of treatment-resistant schizophrenia

Eilis Hannon, +55 more
- 26 Feb 2021 - 
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.
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Multiple sclerosis and psychiatric disorders : comorbidity and sibling risk in a nationwide Swedish cohort

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.
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Depression, anxiety, and antidepressant treatment in women: association with in vitro fertilization outcome.

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.