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Updated: Jun 6, 2026

Animal Models of Depression - Chronic Despair Model (CDM)
Published on: September 23, 2021
Animal models of depression and anxiety: What do they tell us about human condition?
I D Neumann1, G Wegener, J R Homberg
1Dept of Behavioural Neuroendocrinology, Faculty of Biology and Preclinical Medicine, University of Regensburg, Regensburg, Germany.
Abstract:
While modern neurobiology methods are necessary they are not sufficient to elucidate etiology and pathophysiology of affective disorders and develop new treatments. Achievement of these goals is contingent on applying cutting edge methods on appropriate disease models. In this review, the authors present four rodent models with good face-, construct-, and predictive-validity: the Flinders Sensitive rat line (FSL); the genetically "anxious" High Anxiety-like Behavior (HAB) line; the serotonin transporter knockout 5-HTT(-/-) rat and mouse lines; and the post-traumatic stress disorder (PTSD) model induced by exposure to predator scent, that they have employed to investigate the nature of depression and anxiety.
Insights
Investigating affective disorders requires appropriate animal models. This review highlights four validated rodent models for studying depression and anxiety, crucial for developing new treatments.
Area of Science:
- Neurobiology
- Psychiatry
- Animal Models
Background:
- Modern neurobiology is insufficient for understanding affective disorders.
- Effective treatments require validated disease models.
Purpose of the Study:
- To review four rodent models with high validity for affective disorder research.
- To explore the utility of these models in investigating depression and anxiety.
Main Methods:
- Review of Flinders Sensitive rat line (FSL).
- Review of High Anxiety-like Behavior (HAB) rat line.
- Review of serotonin transporter knockout (5-HTT(-/-)) rat and mouse lines.
- Review of a predator scent-induced post-traumatic stress disorder (PTSD) model.
Main Results:
- These models demonstrate good face, construct, and predictive validity.
- The models are suitable for studying the etiology and pathophysiology of affective disorders.
Conclusions:
- Validated rodent models are essential for advancing affective disorder research.
- These specific models offer promising avenues for developing novel therapeutic strategies.
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