Long-term Behavioral and Physiological Consequences of Developmental Group Size History in Mice
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View abstract on PubMed
Summary
This summary is machine-generated.Early life social density impacts adult mice. Rearing in larger groups (six mice) led to persistent behavioral changes and physiological impairments, even after reducing group size in adulthood.
Area Of Science
- Neuroscience
- Developmental Biology
- Behavioral Science
Background
- Early life social environment critically influences adult health.
- Impact of developmental social density on adult phenotypes is understudied.
- Research often focuses on extreme social isolation, neglecting variations in group size.
Purpose Of The Study
- Investigate how developmental social density shapes adult behavioral and physiological reactivity.
- Determine if behavioral phenotypes from larger early groups persist after group size reduction.
- Understand the long-term effects of post-weaning social environment.
Main Methods
- Male C57BL/6N mice housed in groups of six (6-3 group) or three (3-3 group) from postnatal weeks 3-8.
- Group size reduced to three for the 6-3 group at week 8.
- Assessed anxiety, locomotor activity, sociality, working memory, and serum corticosterone from week 9.
Main Results
- Mice from larger early groups (6-3) showed suppressed weight gain, reduced grip strength, and increased pain sensitivity.
- Behaviorally, the 6-3 group exhibited reduced anxiety-like behavior and increased activity in multiple tests.
- The 6-3 group demonstrated improved spatial working memory and lower corticosterone levels.
Conclusions
- Developmental social density induces persistent adult behavioral and physiological phenotypes.
- Early-life social environment creates long-term 'scars' affecting reactivity and neuroendocrine adjustment.
- Early social history profoundly influences adult traits and phenotype stability.
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