PACAP and Coping Behavior in Rats
Author Information
Author(s): Gabor Legradi, Mahasweta Das, Brian Giunta, Khemraj Hirani, Alice E. Mitchell, David M. Diamond
Primary Institution: University of South Florida
Hypothesis
Local administration of PACAP into the central amygdala would exert a strong influence on the expression of coping behaviors in rats exposed to the electrified probe.
Conclusion
Intra-CeA microinfusion of PACAP shifts coping strategies from active burying to passive withdrawal in response to fear-inducing stimuli.
Supporting Evidence
- PACAP microinfusion increased immobility and withdrawal behaviors in shocked rats.
- Behavioral changes were not observed in unshocked rats after PACAP administration.
- PACAP administration resulted in reduced burying behavior and increased latency to bury.
Takeaway
When rats were given a special chemical called PACAP in their brains, they became less active and more withdrawn when scared, instead of trying to bury the scary thing.
Methodology
Male Sprague-Dawley rats were microinfused with PACAP into the central amygdala and tested using the shock-probe fear test to evaluate changes in behavior.
Limitations
The study only included male rats, which may limit the generalizability of the findings to females.
Participant Demographics
Male Sprague-Dawley rats, weighing 210–240 grams.
Statistical Information
P-Value
p<0.001
Statistical Significance
p<0.05
Digital Object Identifier (DOI)
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