Social Isolation and Aggression in Mice Linked to Anxiety and Depression
Author Information
Author(s): Ma Xian-cang, Jiang Dong, Jiang Wen-hui, Wang Fen, Jia Min, Wu Jin, Hashimoto Kenji, Dang Yong-hui, Gao Cheng-ge
Primary Institution: Department of Psychiatry, First Affiliated Hospital of Medical College of Xi'an Jiaotong University, Xian, China
Hypothesis
Does social isolation-induced aggression affect anxiety and depressive-like behavior in male mice subjected to chronic mild stress?
Conclusion
Social isolation-induced aggression can increase anxiety and depressive-like behaviors in male mice subjected to chronic mild stress.
Supporting Evidence
- Mice subjected to chronic mild stress showed reduced sucrose intake, indicating anhedonia.
- Aggression by physical contact in isolated mice exacerbated anxiety-like behavior.
- Mice in the aggressive group showed longer immobility times in the forced swimming test, indicating increased depressive-like behavior.
Takeaway
When mice are kept alone and then made aggressive, they can become more anxious and sad, just like people can when they feel lonely.
Methodology
C57/B6 male mice were divided into three groups: non-stressed controls, isolated mice subjected to chronic mild stress (CMS), and isolated mice subjected to aggression by physical contact.
Potential Biases
Potential bias in behavioral assessments due to the subjective nature of some tests.
Limitations
The study primarily used male mice, which may limit the generalizability of the findings to females.
Participant Demographics
Eighty adult male C57 BL/6J mice, aged 7±1 weeks.
Statistical Information
P-Value
p<0.001
Statistical Significance
p<0.001
Digital Object Identifier (DOI)
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