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Modelling the anxiety-depression continuum in chicks
J E Warnick1, C J Huang, E O Acevedo
1Department of Behavioral Sciences, Arkansas Tech University, Russellville, AR, USA.
Journal of Psychopharmacology (Oxford, England)
|June 3, 2008
Summary
This study validates a chick model for the anxiety-depression continuum. The model successfully identified anxiolytic and antidepressant drug effects, supporting its use in preclinical research.
Area of Science:
- Neuroscience
- Pharmacology
- Animal Models
Background:
- Anxiety and depression are increasingly viewed as a continuum.
- A preclinical model using social-separation in chicks simulates this continuum.
- Further validation of this chick model is essential for its utility.
Purpose of the Study:
- To further validate the chick anxiety-depression continuum model.
- To assess the model's ability to detect anxiolytic and antidepressant drug effects.
- To investigate stress biomarkers within the model.
Main Methods:
- Dose-response studies with anxiolytics (chlordiazepoxide, clonidine) and antidepressants (imipramine, maprotoline, fluoxetine).
- Behavioral assessments during anxiety-like and depression-like phases.
- Measurement of plasma interleukin-6 (IL-6) as a stress biomarker.
Main Results:
- Anxiolytics and some antidepressants showed effects in the anxiety-like phase.
- Antidepressants demonstrated efficacy in the depression-like phase.
- Social separation elevated plasma IL-6, indicating stress.
Conclusions:
- The chick model effectively simulates the anxiety-depression continuum.
- The model demonstrates utility in screening anxiolytic and antidepressant compounds.
- Findings support the chick model as an adjuvant to rodent screening assays.
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