• Fabienne Cyprien, Nicolas Menjot de Champfleur, Jérémy Deverdun, Emilie Olié, Emmanuelle Le Bars, Alain Bonafé, Thibault Mura, Fabrice Jollant, Philippe Courtet, and Sylvaine Artero.
• Inserm, U1061, La Colombière Hospital, Montpellier F-34093, France; University of Montpellier, Montpellier F-34000, France; CHRU Montpellier, Montpellier F-34093, France.
• J Affect Disord. 2016 Dec 1; 206: 115-124.

BackgroundSome MRI studies have noted alterations in the corpus callosum (CC) white matter integrity of individuals with mood disorders and also in patients with suicidal behavior. We investigated the specific impact of suicidal behavior on CC integrity in mood disorders.MethodsCC structural changes were assessed by diffusion tensor imaging (DTI) in 121 women 18-50-year-old): 41 with bipolar disorder (BD), 50 with major depressive disorder (MDD) and 30 healthy controls (HC). Fractional anisotropy (FA) and DTI metrics were calculated for the genu, body and splenium of CC and compared in the three groups by MANCOVA. Then, they were re-analyzed relative to the suicide attempt history within the MDD and BD groups and to the suicide number/severity.ResultsFA values for the CC genu and body were lower in non-suicide attempters with BD than with MDD and in HC. Conversely, FA values for all CC regions were significantly lower in suicide attempters with BD than in HC. Finally, higher number of suicide attempts (>2) and elevated Suicidal Intent Scale score were associated with significant splenium alterations.LimitationsLimitations include the cross-sectional design (non-causal study), the potential influence of medications and concerns about the generalizability to men.ConclusionGenu and body are altered in non-suicide attempters with BD, while splenium is specifically altered in suicide attempters, independently from their psychiatric status. History of suicide attempts may be a source of heterogeneity in the association between CC alterations and BD and may partially explain the variable results of previous studies.Copyright © 2016 Elsevier B.V. All rights reserved.

27 keywords...

hide…