(R)-Ketamine Rapidly Ameliorates the Decreased Spine Density in the Medial Prefrontal Cortex and Hippocampus of Susceptible Mice After Chronic Social Defeat Stress
Jiancheng Zhang, Youge Qu, Lijia Chang, Yaoyu Pu, Kenji Hashimoto
The International Journal of Neuropsychopharmacology August 28, 2019 DOI: 10.1093/ijnp/pyz048 (opens in new tab)
Study at a glance
AI-extracted from the abstract| Characteristics | Controlled experiment Peer reviewed |
|---|---|
| Population | CSDS-susceptible mice |
| Intervention | (R)-ketamine |
| Dose | 10 mg/kg |
| Duration | 3 hours post-treatment |
| Topics | Ketamine Esketamine |
| Keywords | Prefrontal cortex Hippocampus Social defeat Chronic stress Spine molecular biology Cognition Bioinformatics |
| Citations | 56 |
| Key findings | (R)-ketamine rapidly ameliorated decreased spine density in the mPFC and hippocampus of CSDS-susceptible mice. |
Abstract
Background: A recent study demonstrated that spine formation rates by ketamine in the prefrontal cortex (PFC) were not altered at 3-6 h following a single injection, but were markedly altered at 12-24 h. Here, we investigated the acute (3 h post-treatment) effects of (R)-ketamine in the decreased spine density in the medial PFC (mPFC) and hippocampus in susceptible mice after chronic social defeat stress (CSDS).
Methods: (R)-ketamine (10 mg/kg) or saline was administered intraperitoneally to CSDS-susceptible mice. Dendritic spine density in the mPFC and hippocampus was measured 3 h after a single injection.
Results: (R)-ketamine significantly ameliorated the decreased spine density in the prelimbic area of mPFC, Cornu Ammonis3, and dentate gyrus of the hippocampus of CSDS-susceptible mice.
Conclusions: This study suggests that (R)-ketamine rapidly ameliorates the decreased spine density in the mPFC and hippocampus of CSDS-susceptible mice, resulting in its rapid-acting antidepressant effects.