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Title: Whole-Brain Mapping of Neuronal Activity in the Learned Helplessness Model of Depression

Journal Article · · Frontiers in Neural Circuits
 [1];  [2];  [3];  [4];  [5];  [4];  [4];  [4]
  1. Cold Spring Harbor Lab., Cold Spring Harbor, NY (United States); Penn State Univ., Hershey, PA (United States)
  2. Cold Spring Harbor Lab., Cold Spring Harbor, NY (United States); MRC Lab. of Molecular Biology, Cambridge (United Kingdom)
  3. Cold Spring Harbor Lab., Cold Spring Harbor, NY (United States); Brookhaven National Lab. (BNL), Upton, NY (United States); Quinnipiac Univ., Hamden, CT (United States)
  4. Cold Spring Harbor Lab., Cold Spring Harbor, NY (United States)
  5. Cold Spring Harbor Lab., Cold Spring Harbor, NY (United States); Brookhaven National Lab. (BNL), Upton, NY (United States); Mount Sinai School of Medicine, New York, NY (United States)

Some individuals are resilient, whereas others succumb to despair in repeated stressful situations. The neurobiological mechanisms underlying such divergent behavioral responses remain unclear. Here, we employed an automated method for mapping neuronal activity in search of signatures of stress responses in the entire mouse brain. We used serial two-photon tomography to detect expression of c-FosGFP – a marker of neuronal activation – in c-fosGFP transgenic mice subjected to the learned helplessness (LH) procedure, a widely used model of stress-induced depression-like phenotype in laboratory animals. We found that mice showing “helpless” behavior had an overall brain-wide reduction in the level of neuronal activation compared with mice showing “resilient” behavior, with the exception of a few brain areas, including the locus coeruleus, that were more activated in the helpless mice. In addition, the helpless mice showed a strong trend of having higher similarity in whole-brain activity profile among individuals, suggesting that helplessness is represented by a more stereotypic brain-wide activation pattern. This latter effect was confirmed in rats subjected to the LH procedure, using 2-deoxy-2[18F]fluoro-D-glucose positron emission tomography to assess neural activity. In conclusion, our findings reveal distinct brain activity markings that correlate with adaptive and maladaptive behavioral responses tostress, and provide a framework for further studies investigating the contribution of specific brain regions to maladaptive stress responses.

Research Organization:
Cold Spring Harbor Lab., Cold Spring Harbor, NY (United States)
Sponsoring Organization:
USDOE
OSTI ID:
1378931
Journal Information:
Frontiers in Neural Circuits, Vol. 10; ISSN 1662-5110
Publisher:
Frontiers Research FoundationCopyright Statement
Country of Publication:
United States
Language:
English

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Neural Plasticity Associated with Hippocampal PKA-CREB and NMDA Signaling Is Involved in the Antidepressant Effect of Repeated Low Dose of Yueju Pill on Chronic Mouse Model of Learned Helplessness journal January 2017