Journal
NEUROPSYCHOPHARMACOLOGY
Volume 42, Issue 13, Pages 2623-2632Publisher
NATURE PUBLISHING GROUP
DOI: 10.1038/npp.2017.97
Keywords
-
Categories
Funding
- National Institutes of Health [R21EB015573, MH074807, MH082998, MH58356, MH58397, MH69618]
- Pittsburgh Foundation
- Emmerling Fund
- NIH [K23MH100259]
- NIH
- Alkermes
- Shire US Inc.
- Allergan
- AstraZeneca
- Bristol-Myers Squibb Company
- Cerecor, Inc.
- Eli Lilly Co.
- Forest Laboratories
- Gerson Lehrman Group
- Fabre-Kramer Pharmaceuticals, Inc.
- Glaxo-SmithKline
- Guide-point Global
- H. Lundbeck A/S
- MedAvante, Inc.
- Merck and Co. Inc.
- Moksha8
- Naurex, Inc.
- Neuronetics, Inc.
- Novartis
- Ortho-McNeil Pharmaceuticals
- Otsuka
- Pamlab, LLC
- Pfizer
- Sunovion Pharmaceuticals, Inc.
- Trius Therapeutical, Inc.
Ask authors/readers for more resources
Depressed patients show abnormalities in brain connectivity at rest, including hyperconnectivity within the default mode network (DMN). However, there is well-known heterogeneity in the clinical presentation of depression that is overlooked when averaging connectivity data. We used data-driven parsing of neural connectivity to reveal subgroups among 80 depressed patients completing resting state fMRI. Directed functional connectivity paths (eg, region A influences region B) within a depression-relevant network were characterized using Group Iterative Multiple Model Estimation, a method shown to accurately recover the direction and presence of connectivity paths in individual participants. Individuals were clustered using community detection on neural connectivity estimates. Subgroups were compared on network features and on clinical and biological/demographic characteristics that influence depression prognosis. Two subgroups emerged. Subgroup A, containing 71% of the patients, showed a typical pattern of connectivity across DMN nodes, as previously reported in depressed patients on average. Subgroup B exhibited an atypical connectivity profile lacking DMN connectivity, with increased dorsal anterior cingulate-driven connectivity paths. Subgroup B members had an over-representation of females (87% of Subgroup B vs 65% of Subgroup A; chi(2) = 3.89, p = 0.049), comorbid anxiety diagnoses (42.9% of Subgroup B vs 17.5% of Subgroup A; chi(2) = 5.34, p = .02), and highly recurrent depression (63.2% of Subgroup B vs 31.8% of Subgroup A; chi(2) = 5.38, p = .02). Neural connectivity-based categorization revealed an atypical pattern of connectivity in a depressed patient subset that would be overlooked in group comparisons of depressed and healthy participants, and tracks with clinically relevant phenotypes including anxious depression and episodic recurrence. Data-driven parsing suggests heterogeneous substrates of depression; ideally, future work building on these findings will inform personalized treatment.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available