Chronic Mild Stress in Mice: Effects on Anhedonia and Anxiety
Author Information
Author(s): Martin C. Schweizer, Markus S. H. Henniger, Inge Sillaber
Primary Institution: Affectis Pharmaceuticals AG, Martinsried, Germany
Hypothesis
Can chronic mild stress (CMS) induce depression-like symptoms in mice?
Conclusion
The CMS procedure induced behavioral changes compatible with anhedonia, but also resulted in unexpected decreases in anxiety.
Supporting Evidence
- CMS led to decreased saccharin intake in BL/6J mice.
- D2Ola mice spent more time in lit areas, indicating reduced anxiety.
- CMS effects varied significantly across different mouse strains.
- Unexpected anxiolytic-like effects were observed in some strains.
- Body weight gain was reduced in D2Ola and BL/6J mice due to CMS.
Takeaway
Researchers stressed mice to see if it would make them sad, and they found that while some mice showed signs of sadness, others acted less anxious than expected.
Methodology
Male mice from different strains were subjected to a weekly CMS protocol, and their behavior and body weight were assessed.
Potential Biases
Potential biases in behavioral assessments due to environmental factors.
Limitations
The effects of CMS were strain-dependent and may not generalize across all mouse strains.
Participant Demographics
Male mice from seven different strains.
Statistical Information
P-Value
p<0.01
Statistical Significance
p<0.05
Digital Object Identifier (DOI)
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