Resting State Functional Connectivity of Dorsal Raphe Nucleus and Ventral Tegmental Area in Medication-Free Young Adults With Major Depression
| Autor: | Harish Karne, Parashar Koirala, Amit Anand, Mark J. Lowe, Stephen E. Jones |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
young adults
medicine.medical_specialty lcsh:RC435-571 Hippocampus Amygdala 03 medical and health sciences 0302 clinical medicine Dorsal raphe nucleus lcsh:Psychiatry Cortex (anatomy) Internal medicine mental disorders medicine major depression (MDD) resting state Depression (differential diagnoses) Original Research Psychiatry Resting state fMRI business.industry brain connectivity functional connectivity ventral tegmental area (VTA) dorsal raphe 030227 psychiatry Ventral tegmental area Psychiatry and Mental health Endocrinology medicine.anatomical_structure Antidepressant resting state–fMRI business 030217 neurology & neurosurgery |
| Zdroj: | Frontiers in Psychiatry, Vol 9 (2019) Frontiers in Psychiatry |
| ISSN: | 1664-0640 |
| Popis: | Background: This study has, for the first time, investigated the dorsal raphe nucleus (DRN) and ventral tegmental area (VTA) resting state whole-brain functional connectivity in medication-free young adults with major depression (MDD), at baseline and in relationship to treatment response. Method: A total of 119 subjects: 78 MDD (24 ± 4 years.) and 41 Healthy Controls (HC) (24 ± 3 years) were included in the analysis. DRN and VTA ROIs anatomical templates were used to extract resting state fluctuations and used to derive whole-brain functional connectivity. Differences between MDD and HCs were examined, as well as the correlation of baseline Hamilton Depression and Anxiety scale scores to the baseline DRN and VTA connectivity. The relationship to treatment response was examined by investigating the correlation of the percentage decrease in depression and anxiety scale scores with baseline connectivity measures. Results: There was a significant decrease (p = 0.05; cluster-wise corrected) in DRN connectivity with the prefrontal and mid-cingulate cortex in the MDD group, compared with the HC group. DRN connectivity with temporal areas, including the hippocampus and amygdala, positively correlated with baseline depression scores (p = 0.05; cluster-wise corrected). VTA connectivity with the cuneus-occipital areas correlated with a change in depression scores (p = 0.05; cluster-wise corrected). Conclusion: Our results indicate the presence of DRN-prefrontal and DRN-cingulate cortex connectivity abnormalities in young medication-free depressed subjects when compared to HCs and that the severity of depressive symptoms correlates with DRN-amygdala/hippocampus connectivity. VTA connectivity with the parietal and occipital areas is related to antidepressant treatment associated with a decrease in depressive symptoms. Future studies need to be carried out in larger and different age group populations to confirm the findings of the study. |
| Databáze: | OpenAIRE |
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