Impact of Stress Before Puberty on Fear Conditioning in Rats
Author Information
Author(s): Maria Toledo-Rodriguez, Carmen Sandi
Primary Institution: Ecole Polytechnique Federale de Lausanne (EPFL)
Hypothesis
Stress experienced before puberty will have a differential impact on fear-related behaviors in male and female rats during adolescence and early adulthood.
Conclusion
Stress before puberty affects fear conditioning in a sex-specific manner, with males showing increased fear responses and females showing reduced responses.
Supporting Evidence
- Stressed males showed increased freezing responses to auditory cues during adolescence.
- Stressed females displayed reduced freezing responses to contextual cues during adolescence.
- Stress before puberty did not affect corticosterone levels in adulthood.
- Stressed males had difficulty extinguishing auditory fear memories in adulthood.
Takeaway
If rats experience stress before they grow up, it can change how scared they get later on, and this effect is different for boys and girls.
Methodology
The study involved exposing male and female rats to psychogenic stress before puberty and then assessing their fear responses during adolescence and adulthood using fear conditioning protocols.
Potential Biases
Potential bias in the interpretation of behavioral responses due to the subjective nature of some assessments.
Limitations
The study does not include an adult-stressed group for comparison, limiting conclusions about differential susceptibility to stress across ages.
Participant Demographics
Nineteen male and twelve female Wistar Han rats were used in the study.
Statistical Information
P-Value
p<0.05
Statistical Significance
p<0.05
Digital Object Identifier (DOI)
Want to read the original?
Access the complete publication on the publisher's website