Affordable Access

deepdyve-link deepdyve-link
Publisher Website

Antidepressant and proneurogenic influence of environmental enrichment in mice: protective effects vs recovery.

Authors
  • Llorens-Martín, María
  • Tejeda, Gonzalo S
  • Trejo, José L
Type
Published Article
Journal
Neuropsychopharmacology
Publisher
Springer Nature
Publication Date
Nov 01, 2011
Volume
36
Issue
12
Pages
2460–2468
Identifiers
DOI: 10.1038/npp.2011.134
PMID: 21796111
Source
Medline
License
Unknown

Abstract

Physical-cognitive activity has long-lasting beneficial effects on the brain and on behavior. Environmental enrichment (EE) induces brain activity known to influence the behavior of mice, as measured in learned helplessness paradigms (forced swim test), and neurogenic cell populations in the hippocampal dentate gyrus. However, it is not completely clear whether the antidepressant and proneurogenic effects of EE are different in animals that are naive or pre-exposed to the stress inducing helplessness, and if this depends on the type of stressor. It also remains unclear whether differential effects are exerted on distinct neurogenic subpopulations. We found that EE has a protective effect in adult female mice (C57BL/6J) when exposed twice to the same stressor (forced swim test) but it has no influence on recovery. The repeated exposure to this stressor was analyzed together with the effects of EE on different neurogenic populations distinguished by age and differentiation state. Younger cells are more sensitive and responsive to the conditions, both the positive and negative effects. These results are relevant to identify the cell populations that are the targets of stress, depression, and enrichment, and that form part of the mechanism responsible for mood dysfunctions.

Report this publication

Statistics

Seen <100 times