Chronic social defeat stress induces sustained synaptic structural changes in the prefrontal cortex and amygdala

2019 ◽  
Vol 373 ◽  
pp. 112079 ◽  
Author(s):  
L. Colyn ◽  
E. Venzala ◽  
S. Marco ◽  
I. Perez-Otaño ◽  
R.M. Tordera
Keyword(s):  
Prefrontal Cortex ◽  
Structural Changes ◽  
Social Defeat ◽  
Social Defeat Stress ◽  
Chronic Social Defeat Stress

scholarly journals Chronic Social Defeat Stress Modulates Dendritic Spines Structural Plasticity in Adult Mouse Frontal Association Cortex

2017 ◽  
Vol 2017 ◽  
pp. 1-13 ◽  
Author(s):  
Yu Shu ◽  
Tonghui Xu
Keyword(s):  
Prefrontal Cortex ◽  
Chronic Stress ◽  
Neural Circuits ◽  
Neural Circuit ◽  
Structural Plasticity ◽  
Social Defeat ◽  
Social Defeat Stress ◽  
Chronic Social Defeat Stress ◽  
Stress Experience ◽  
Spine Dynamics

Chronic stress is associated with occurrence of many mental disorders. Previous studies have shown that dendrites and spines of pyramidal neurons of the prefrontal cortex undergo drastic reorganization following chronic stress experience. So the prefrontal cortex is believed to play a key role in response of neural system to chronic stress. However, how stress induces dynamic structural changes in neural circuit of prefrontal cortex remains unknown. In the present study, we examined the effects of chronic social defeat stress on dendritic spine structural plasticity in the mouse frontal association (FrA) cortexin vivousing two-photon microscopy. We found that chronic stress altered spine dynamics in FrA and increased the connectivity in FrA neural circuits. We also found that the changes in spine dynamics in FrA are correlated with the deficit of sucrose preference in defeated mice. Our findings suggest that chronic stress experience leads to adaptive change in neural circuits that may be important for encoding stress experience related memory and anhedonia.

scholarly journals (R)-Ketamine Rapidly Ameliorates the Decreased Spine Density in the Medial Prefrontal Cortex and Hippocampus of Susceptible Mice After Chronic Social Defeat Stress

2019 ◽  
Vol 22 (10) ◽  
pp. 675-679 ◽  
Author(s):  
Jiancheng Zhang ◽  
Youge Qu ◽  
Lijia Chang ◽  
Yaoyu Pu ◽  
Kenji Hashimoto
Keyword(s):  
Prefrontal Cortex ◽  
Medial Prefrontal Cortex ◽  
Single Injection ◽  
Social Defeat ◽  
Spine Density ◽  
Social Defeat Stress ◽  
Dendritic Spine Density ◽  
Antidepressant Effects ◽  
Chronic Social Defeat Stress ◽  
Medial Pfc

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.

scholarly journals Prefrontal cortex reactivity underlies trait vulnerability to chronic social defeat stress

2014 ◽  
Vol 5 (1) ◽  
Author(s):  
Sunil Kumar ◽  
Rainbo Hultman ◽  
Dalton Hughes ◽  
Nadine Michel ◽  
Brittany M. Katz ◽  
...  
Keyword(s):  
Prefrontal Cortex ◽  
Social Defeat ◽  
Social Defeat Stress ◽  
Chronic Social Defeat Stress
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