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Using Chronic Social Stress to Model Postpartum Depression in Lactating Rodents
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Stress-Induced Depression: Is Social Rank a Predictive Risk Factor?
Thomas Larrieu1, Carmen Sandi1
1Brain Mind Institute, School of Life Sciences, École Polytechnique Fédérale de Lausanne, EPFL, Lausanne 1015, Switzerland.
Summary
Social rank influences stress susceptibility. Dominant individuals may be vulnerable to stress-induced depression, challenging previous beliefs linking subordination with depression.
Area of Science:
- Neuroscience and Behavioral Science
- Psychiatry
Background:
- Stress susceptibility and resilience are influenced by genetics and early adversity.
- Recent evidence suggests social rank is a key determinant of stress susceptibility.
- Conflicting evidence exists regarding whether dominance or subordination predicts stress-induced depression.
Purpose of the Study:
- To review and analyze rodent models of chronic social stress.
- To investigate the role of social rank in vulnerability to stress-induced depression.
- To determine if social status or loss of status predicts depression.
Main Methods:
- Review of rodent protocols for chronic social stress.
- Analysis of studies linking social rank to stress vulnerability.
- Discussion of conflicting findings in human and animal research.
Main Results:
- Rodent models provide insights into social rank and stress vulnerability.
- Evidence suggests dominance may confer vulnerability, contradicting some prior findings.
- The dynamic aspect of losing social rank and resources is a critical factor.
Conclusions:
- Social rank is a significant factor in stress-induced depression.
- Dominance, not just subordination, can be linked to vulnerability.
- Loss of social rank and resources may be more predictive than static status.
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