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. 2015 Oct;54(10):832-40.
doi: 10.1016/j.jaac.2015.07.006. Epub 2015 Aug 4.

Subthreshold depression and regional brain volumes in young community adolescents

Collaborators, Affiliations

Subthreshold depression and regional brain volumes in young community adolescents

Hélène Vulser et al. J Am Acad Child Adolesc Psychiatry. 2015 Oct.

Abstract

Objective: Neuroimaging findings have been reported in regions of the brain associated with emotion in both adults and adolescents with depression, but few studies have investigated whether such brain alterations can be detected in adolescents with subthreshold depression, a condition at risk for major depressive disorder. In this study, we searched for differences in brain structure at age 14 years in adolescents with subthreshold depression and their relation to depression at age 16 years.

Method: High-resolution structural magnetic resonance imaging was used to assess adolescents with self-reported subthreshold depression (n = 119) and healthy control adolescents (n = 461), all recruited from a community-based sample. Regional gray and white matter volumes were compared across groups using whole-brain voxel-based morphometry. The relationship between subthreshold depression at baseline and depression outcome was explored using causal mediation analyses to search for mediating effects of regional brain volumes.

Results: Adolescents with subthreshold depression had smaller gray matter volume in the ventromedial prefrontal and rostral anterior cingulate cortices and caudates, and smaller white matter volumes in the anterior limb of internal capsules, left forceps minor, and right cingulum. In girls, but not in boys, the relation between subthreshold depression at baseline and high depression score at follow-up was mediated by medial-prefrontal gray matter volume.

Conclusion: Subthreshold depression in early adolescence might be associated with smaller gray and white matter volumes in regions of the frontal-striatal-limbic affective circuit, and the occurrence of depression in girls with subthreshold depression might be influenced by medial-prefrontal gray matter volume. However, these findings should be interpreted with caution because of the limitations of the clinical assessment methods.

Keywords: MRI; gray matter; subthreshold depression; white matter.

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Conflict of interest statement

Disclosure: Dr. Goodman is the owner of Youthinmind, Ltd., which provides no-cost and low-cost software and websites related to the Development and Well-Being Assessment and the Strengths-and-Difficulties Questionnaire. Dr. Stringaris has received grant or research support from the Wellcome Trust, the National Institute for Health Research (NIHR), and the Department of Health UK. He has received royalties from Cambridge University Press for his book The Maudsley Reader in Phenomenological Psychiatry. Dr. Barker has received honoraria for teaching from General Electric, acted as consultant of IXICO, and was granted US patent 2015-0123662A1. Dr. Robbins has received compensation as a consultant for Cambridge Cognition. Dr. Paillère-Martinot has received compensation from Janssen-Cilag for CME activities. Drs. Vulser, Lemaitre, Artiges, Penttil€ a, Struve, Fadai, Kappel, Grimmer, Poustka, Conrod, Frouin, Banaschewski, Bokde, Bromberg, Büchel, Flor, Gallinat, Garavan, Gowland, Heinz, Ittermann, Lawrence, Loth, Mann, Nees, Paus, Pausova, Rietschel, Smolka, Schumann, Martinot, and Mr. Miranda report no biomedical financial interests or potential conflict of interest.

Figures

Figure 1
Figure 1
Regions with smaller gray matter volume (red) and white matter volume (green) in 119 adolescents with subthreshold depression versus 461 controls. Note: voxel level was set at p < .05 (familywise error–corrected for the whole brain). Results are superimposed on a T1-weighted magnetic resonance imaging scan of an adolescent brain from the Imagen database. (a) Sagittal slice; (b) transversal slice; (c) 3-dimensional representation (coronal and transversal slices). R = right.
Figure 2
Figure 2
Mediation of the gray matter medial prefrontal cortex on the relationship between subthreshold depression at age 14 years and depression at age 16 years in girls, using causal mediation analysis.

Comment in

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