Learning to actively cope with stress in female mice

Area of Science:

• Neuroscience
• Behavioral Science
• Stress Research

Background:

• Stress-related mood and anxiety disorders are more prevalent in women.
• Understanding stress coping mechanisms in females is crucial for mental health research.
• Previous studies demonstrated active coping enhancement in male mice after similar exposures.

Purpose of the Study:

• To investigate if female mice exhibit comparable learning to cope effects after repeated exposure to a same-sex resident stranger.
• To assess the generalization of coping behaviors across different behavioral tests.
• To examine the relationship between stress hormone levels and active coping in females.

Main Methods:

• Female mice underwent repeated exposure to a same-sex resident stranger in the home cage.
• Behavioral assessments included open-field, object-exploration, and tail-suspension tests.
• Plasma corticosterone levels and behavioral measures (aggression, risk assessment) were collected.

Main Results:

• Repeated exposure enhanced active coping behaviors, including reduced freezing and increased center entries in the open-field test.
• Mice showed shorter object-exploration latencies and a trend towards decreased immobility in tail-suspension tests.
• Corticosterone levels increased over repeated exposure sessions, indicating a mild stress response.

Conclusions:

• Exposure to a same-sex resident stranger acts as a mild stressor that promotes learning to actively cope in female mice.
• The observed active coping enhancements generalized across multiple behavioral contexts.
• This study highlights a potential non-pharmacological method for enhancing stress resilience in females.