Ingrid Torp Johansen

• Andreou, Dimitrios; Steen, Nils Eiel; Mørch-Johnsen, Lynn Egeland; Jørgensen, Kjetil Nordbø; Wortinger, Laura Anne & Barth, Claudia [Show all 19 contributors for this article] (2024). Toxoplasma gondii infection associated with inflammasome activation and neuronal injury. Scientific Reports. ISSN 2045-2322. 14(1). doi: 10.1038/s41598-024-55887-9.
• Johansen, Ingrid Torp; Steen, Nils Eiel; Rødevand, Linn ; Lunding, Synve Hoffart; Hjell, Gabriela & Ormerod, Monica Bettina E. Greenwood [Show all 11 contributors for this article] (2024). Sex differences in autonomic adverse effects related to antipsychotic treatment and associated hormone profiles. Nature NPJ Schizophrenia. ISSN 2334-265X. 10(1). doi: 10.1038/s41537-023-00430-4.
• Hjell, Gabriela; Rokicki, Jaroslav; Szabo, Attila; Holst, Rene; Tesli, Natalia & Bell, Christina [Show all 19 contributors for this article] (2023). Impulsivity across severe mental disorders: a cross-sectional study of immune markers and psychopharmacotherapy. BMC Psychiatry. ISSN 1471-244X. 23(1). doi: 10.1186/s12888-023-05154-4. Full text in Research Archive
• Lunding, Synve Hoffart; Ueland, Torill; Aas, Monica; Høegh, Margrethe Collier; Werner, Maren Caroline Frogner & Rødevand, Linn [Show all 16 contributors for this article] (2023). Tobacco smoking related to childhood trauma mediated by cognitive control and impulsiveness in severe mental disorders. Schizophrenia Research. ISSN 0920-9964. 261, p. 236–244. doi: 10.1016/j.schres.2023.09.041. Full text in Research Archive
• Aas, Monica; Andreassen, Ole; Gjerstad, Johannes; Rødevand, Linn ; Hjell, Gabriela & Johansen, Ingrid Torp [Show all 12 contributors for this article] (2023). Expression of ANK3 moderates the association between childhood trauma and affective traits in severe mental disorders. Scientific Reports. ISSN 2045-2322. 13:13845, p. 1–9. doi: 10.1038/s41598-023-40310-6. Full text in Research Archive
• Johansen, Ingrid Torp; Steen, Nils Eiel; Rødevand, Linn ; Werner, Maren Caroline Frogner; Lunding, Synve Hoffart & Hjell, Gabriela [Show all 12 contributors for this article] (2022). Sex-specific associations between metabolic hormones, severe mental disorders and antipsychotic treatment. Psychoneuroendocrinology. ISSN 0306-4530. 146. doi: 10.1016/j.psyneuen.2022.105927.
• Ormerod, Monica Bettina E. Greenwood; Ueland, Thor; Werner, Maren Caroline Frogner; Hjell, Gabriela; Rødevand, Linn Nilsen & Sæther, Linn Sofie [Show all 14 contributors for this article] (2022). Composite immune marker scores associated with severe mental disorders and illness course. Brain, Behavior, and Immunity - Health (BBI - Health). ISSN 2666-3546. 24. doi: 10.1016/j.bbih.2022.100483. Full text in Research Archive
• Hjell, Gabriela; Szabo, Attila; Mørch-Johnsen, Lynn Egeland; Holst, Rene; Tesli, Natalia & Bell, Christina [Show all 18 contributors for this article] (2022). Interleukin-18 signaling system links to agitation in severe mental disorders. Psychoneuroendocrinology. ISSN 0306-4530. 140:105721, p. 1–8. doi: 10.1016/j.psyneuen.2022.105721. Full text in Research Archive Show summary

  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 implicated in animal models of agitation. We investigated if levels of circulating inflammasome-related immune markers were associated with agitation in severe mental disorders. Methods Individuals with a psychotic or affective disorder (N = 660) underwent blood sampling and clinical characterization. Plasma levels of interleukin (IL)‐18, IL-18 binding protein (IL-18BP), IL-18 receptor 1 (IL-18R1), IL-18 receptor accessory protein (IL-18RAP), and IL-1 receptor antagonist (IL-1RA) were measured. Agitation levels were estimated with the Positive and Negative Syndrome Scale Excited Component. Multiple linear- and logistic regression were used to investigate the associations between agitation and the immune markers, while controlling for confounders. The influence of psychotic and affective symptoms was assessed in follow-up analyses. Results Agitation was positively associated with IL-18BP (β = 0.13, t = 3.41, p = 0.0007) after controlling for multiple confounders, including BMI, smoking, medication, and substance use. Adjustment for psychotic, manic, and depressive symptoms did not affect the results. There were no significant associations between agitation and the other investigated immune markers (IL-1RA (β = 0.06, t = 1.27, p = 0.20), IL-18 (β = 0.05, t = 1.25, p = 0.21), IL-18R1 (β = 0.04, t = 1.01, p = 0.31), IL-18RAP (odds ratio = 0.96, p = 0.30)). In a subsample (N = 463), we also adjusted for cortisol levels, which yielded unaltered results. Conclusion Our findings add to the accumulating evidence of immune system disturbances in severe mental disorders and suggest the IL-18 system as a part of the biological correlate of agitation independent of affective and psychotic symptoms.

• Johansen, Ingrid Torp; Steen, Nils Eiel; Haram, Marit; Rødevand, Linn ; Werner, Maren Caroline Frogner & Lunding, Synve Hoffart [Show all 12 contributors for this article] (2022). Sex differences in antipsychotic-related triglyceride levels are associated with metabolic hormone differences in patients with severe mental disorders. Schizophrenia Research. ISSN 0920-9964. 243, p. 55–63. doi: 10.1016/j.schres.2022.02.015. Full text in Research Archive
• Reponen, Elina Johanna; Tesli, Martin Steen; Dieset, Ingrid; Steen, Nils Eiel; Vedal, Trude Seselie Jahr & Szabo, Attila [Show all 12 contributors for this article] (2021). Adiponectin Is Related to Cardiovascular Risk in Severe Mental Illness Independent of Antipsychotic Treatment. Frontiers in Psychiatry. ISSN 1664-0640. 12. doi: 10.3389/fpsyt.2021.623192. Full text in Research Archive

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