251. Increased cortical surface area but not altered cortical thickness or gyrification in bipolar disorder following stabilisation from a first episode of mania.
- Author
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Van Rheenen TE, Cotton SM, Dandash O, Cooper RE, Ringin E, Daglas-Georgiou R, Allott K, Chye Y, Suo C, Macneil C, Hasty M, Hallam K, McGorry P, Fornito A, Yücel M, Pantelis C, and Berk M
- Subjects
- Humans, Mania pathology, Prefrontal Cortex pathology, Magnetic Resonance Imaging methods, Occipital Lobe, Cerebral Cortex diagnostic imaging, Cerebral Cortex pathology, Bipolar Disorder diagnostic imaging, Bipolar Disorder pathology
- Abstract
Background: Despite reports of altered brain morphology in established bipolar disorder (BD), there is limited understanding of when these morphological abnormalities emerge. Assessment of patients during the early course of illness can help to address this gap, but few studies have examined surface-based brain morphology in patients at this illness stage., Methods: We completed a secondary analysis of baseline data from a randomised control trial of BD individuals stabilised after their first episode of mania (FEM). The magnetic resonance imaging scans of n = 35 FEM patients and n = 29 age-matched healthy controls were analysed. Group differences in cortical thickness, surface area and gyrification were assessed at each vertex of the cortical surface using general linear models. Significant results were identified at p < 0.05 using cluster-wise correction., Results: The FEM group did not differ from healthy controls with regards to cortical thickness or gyrification. However, there were two clusters of increased surface area in the left hemisphere of FEM patients, with peak coordinates falling within the lateral occipital cortex and pars triangularis., Conclusions: Cortical thickness and gyrification appear to be intact in the aftermath of a first manic episode, whilst cortical surface area in the inferior/middle prefrontal and occipitoparietal cortex is increased compared to age-matched controls. It is possible that increased surface area in the FEM group is the outcome of abnormalities in a premorbidly occurring process. In contrast, the findings raise the hypothesis that cortical thickness reductions seen in past studies of individuals with more established BD may be more attributable to post-onset factors., Competing Interests: Declaration of Competing Interest Dr. Van Rheenen has received grants unrelated to the current study from Club Melbourne, the Henry Freeman Trust, Jack Brockhoff Foundation, University of Melbourne, Barbara Dicker Brain Sciences Foundation, Rebecca L Cooper Foundation and the Society of Mental Health Research. Professor Berk has received Grant/Research Support from the NIH, Cooperative Research Centre, Simons Autism Foundation, Cancer Council of Victoria, Stanley Medical Research Foundation, Medical Benefits Fund, National Health and Medical Research Council, Medical Research Futures Fund, Beyond Blue, Rotary Health, A2 milk company, Meat and Livestock Board, Woolworths, Avant and the Harry Windsor Foundation, has been a speaker for Astra Zeneca, Lundbeck, Merck, Pfizer, and served as a consultant to Allergan, Astra Zeneca, Bioadvantex, Bionomics, Collaborative Medicinal Development, Lundbeck Merck, Pfizer and Servier. Prof Yücel also received philanthropic donations from the David Winston Turner Endowment Fund, Wilson Foundation, as well as payments in relation to court-, expert witness-, and/or expert review-reports; the funding sources had no role in the design, management, data analysis, presentation, or interpretation and write-up of the data. Professor Pantelis has been on advisory boards for AstraZeneca, Janssen-Cilag, Lundbeck and Servier; and he has received honoraria for talks presented at educational meetings organized by AstraZeneca, Eli Lilly, Janssen-Cilag, Lundbeck, Pfizer and Shire. Prof Cotton, Dr. Dandash, Miss Ringin, Miss Cooper, Dr. Daglas-Georgiou, A/Prof Allott, Dr. Chye, Dr. Suo, Dr. MacNeil, Dr. Hasty, Dr. Hallam, Prof McGorry and Prof Fornito do not have any disclosures., (Copyright © 2022 Elsevier Inc. All rights reserved.)
- Published
- 2023
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