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Prefrontal cortical volume in childhood-onset major depression: preliminary findings
Carla L Nolan1, Gregory J Moore, Rachel Madden
1Department of Psychiatry and Behavioral Neurosciences, Wayne State University School of Medicine, Detroit, MI, USA.
Insights
Pediatric major depressive disorder (MDD) shows altered prefrontal cortex anatomy. Nonfamilial MDD cases exhibited larger left prefrontal volumes compared to familial MDD and healthy controls.
Area of Science:
- Neuroscience
- Psychiatry
- Pediatric Mental Health
Background:
- Prefrontal cortex abnormalities are linked to major depressive disorder (MDD) pathogenesis.
- No prior studies investigated prefrontal cortical anatomy in pediatric MDD near illness onset before treatment.
Purpose of the Study:
- To examine prefrontal cortical anatomy in psychotropic-naive pediatric patients with MDD.
- To compare anatomical differences between familial and nonfamilial MDD subtypes.
Main Methods:
- Volumetric magnetic resonance imaging (MRI) was used.
- 22 psychotropic-naive pediatric patients (aged 9-17) with MDD and 22 healthy controls were studied.
- Patients were categorized into familial MDD (n=12) and nonfamilial MDD (n=10) groups.
Main Results:
- Patients with nonfamilial MDD showed significantly larger left-sided prefrontal cortical volumes than familial MDD patients (17% larger) and controls (11% larger).
- No significant differences in left-sided or right-sided prefrontal cortical volumes were found between familial MDD patients and controls.
- Right-sided prefrontal cortical volumes did not differ significantly among the three groups.
Conclusions:
- Findings suggest prefrontal cortical alterations in pediatric MDD may differ between familial and nonfamilial subtypes.
- These results offer preliminary evidence for distinct anatomical profiles in pediatric MDD subtypes.
- Further research with larger sample sizes is needed to confirm these preliminary findings.
Background:
Abnormalities in the prefrontal cortex have been implicated in the pathogenesis of major depressive disorder (MDD). To our knowledge, no prior study has examined prefrontal cortical anatomy in pediatric patients with MDD near the onset of illness before receiving treatment.
Methods:
Volumetric magnetic resonance imaging studies were conducted in 22 psychotropic-naive patients with MDD, aged 9 to 17 years (10 males and 12 females), and 22 case-matched healthy comparison control subjects. Twelve of the 22 patients with MDD had at least 1 first-degree relative with MDD (familial MDD), whereas 10 had no clear family history of MDD (nonfamilial MDD).
Results:
Patients with nonfamilial MDD had significantly larger left-sided but not right-sided prefrontal cortical volumes than patients with familial MDD (17% larger) and controls (11% larger). Left-sided and right-sided prefrontal cortical volumes did not differ significantly between patients with familial MDD and controls.
Conclusions:
These results provide new evidence of prefrontal cortical alterations in pediatric MDD that may differ in familial and nonfamilial subtypes of MDD. Our findings must be considered preliminary, however, in view of the small sample size.