Cited by 124Treatment of Major DepressionTryptophan and brain disordersNeurological disorders and treatments

The Nucleus Accumbens and Ketamine Treatment in Major Depressive Disorder

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Abdallah, Chadi G, Jackowski, Andrea, Salas, Ramiro, Gupta, Swapnil, Sato, João R, Mao, Xiangling, Coplan, Jeremy D, Shungu, Dikoma C +1 more·2017·Neuropsychopharmacology

Abstract

Animal models of depression repeatedly showed stress-induced nucleus accumbens (NAc) hypertrophy. Recently, ketamine was found to normalize this stress-induced NAc structural growth. Here, we investigated NAc structural abnormalities in major depressive disorder (MDD) in two cohorts. Cohort A included a cross-sectional sample of 34 MDD and 26 healthy control (HC) subjects, with high-resolution magnetic resonance imaging (MRI) to estimate NAc volumes. Proton MR spectroscopy (1 H MRS) was used to divide MDD subjects into two subgroups: glutamate-based depression (GBD) and non-GBD. A separate longitudinal sample (cohort B) included 16 MDD patients who underwent MRI at baseline then 24 h following intravenous infusion of ketamine (0.5 mg/kg). In cohort A, we found larger left NAc volume in MDD compared to controls (Cohen's d=1.05), but no significant enlargement in the right NAc (d=0.44). Follow-up analyses revealed significant subgrouping effects on the left (d⩾1.48) and right NAc (d⩾0.95) with larger bilateral NAc in non-GBD compared to GBD and HC. NAc volumes were not different between GBD and HC. In cohort B, ketamine treatment reduced left NAc, but increased left hippocampal, volumes in patients achieving remission. The cross-sectional data provided the first evidence of enlarged NAc in patients with MDD. These NAc abnormalities were limited to patients with non-GBD. The pilot longitudinal data revealed a pattern of normalization of left NAc and hippocampal volumes particularly in patients who achieved remission following ketamine treatment, an intriguing preliminary finding that awaits replication.

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  • Structural MRI evidence shows increased hippocampal volumes and decreased nucleus accumbens volumes 24 h post-infusion, correlated to treatment response.

    “Structural MRI has been performed on human subjects undergoing single-infusion ketamine, and evidence has been provided showing increased hippocampal volumes and decreased nucleus accumbens volumes 24 h post-infusion, which was correlated to treatment response.212”

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Authors
Abdallah, C. G., Jackowski, A., Salas, R., Gupta, S., Sato, J. R., Mao, X., Coplan, J. D., Shungu, D. C., & Mathew, S. J.
Affiliations
  • Yale University (US)
  • Universidade Federal de São Paulo (BR)
  • Michael E. DeBakey VA Medical Center (US)
  • Universidade Federal do ABC (BR)
  • Cornell University (US)
  • SUNY Downstate Health Sciences University (US)
Corresponding author
Abdallah, Chadi G
Venue
Neuropsychopharmacology
Published
2017-03-08
Volume
42
Issue
8
Pages
1739-1746
ISSN
  • 0893-133X (ISSN-L)
  • 1740-634X
OpenAlex
W2592351868
Cited by
123
References
41
Citations by year
2026: 4 · 2025: 8 · 2024: 16 · 2023: 17 · 2022: 13 · 2021: 15 · 2020: 28 · 2019: 11 · 2018: 7 · 2017: 3
FWCI
9.02
Type
journal article
Language
en
Open access
Locations
  • Neuropsychopharmacology (publishedVersion)
  • Europe PMC (PubMed Central) (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
  • UNIFESP Institutional Repository (Universidade Federal de São Paulo) (submittedVersion)
Funders
  • U.S. Department of Veterans Affairs
  • National Alliance for Research on Schizophrenia and Depression
  • National Institutes of Health (1s10od021782-01, 5k23mh101498-05, MH-101498, UL1TR001863)
  • National Center for PTSD, U.S. Department of Veterans Affairs
  • National Institute of Mental Health (K23MH069656, K23MH-101498(, R01MH081870)
  • National Center for Research Resources (M01RR000071)
  • National Center for Advancing Translational Sciences
Topics
  • Health Sciences › Medicine › Pharmacology › Treatment of Major Depression
  • Life Sciences › Neuroscience › Biological Psychiatry › Tryptophan and brain disorders
  • Health Sciences › Medicine › Neurology › Neurological disorders and treatments
Keywords
nucleus accumbens, major depressive disorder, ketamine, brain volume, hippocampus, depression remission, 1H NMR, animal models of depression
MeSH terms
Adult, Cross-Sectional Studies, Major Depressive Disorder, Female, Hippocampus, Humans, Hypertrophy, Ketamine, Functional Laterality, Longitudinal Studies, Magnetic Resonance Imaging, Male, Nucleus Accumbens, Case-Control Studies, Glutamic Acid, Young Adult, Proton Magnetic Resonance Spectroscopy

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