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Animal models of suicide-trait-related behaviors
Oz Malkesman1, Daniel S Pine, Tyson Tragon
1Laboratory of Molecular Pathophysiology, National Institute of Mental Health, Intramural Research Program, National Institutes of Health, Bethesda, MD 20892, USA.
Abstract:
Although antidepressants are moderately effective in treating major depressive disorder (MDD), concerns have arisen that selective serotonin-reuptake inhibitors (SSRIs) are associated with suicidal thinking and behavior, especially in children, adolescents and young adults. Almost no experimental research in model systems has considered the mechanisms by which SSRIs might be associated with this potential side effect in some susceptible individuals. Suicide is a complex behavior and impossible to fully reproduce in an animal model. However, by investigating traits that show strong cross-species parallels in addition to associations with suicide in humans, animal models might elucidate the mechanisms by which SSRIs are associated with suicidal thinking and behavior. Traits linked with suicide in humans that can be successfully modeled in rodents include aggression, impulsivity, irritability and hopelessness/helplessness. Modeling these relevant traits in animals can help to clarify the impact of SSRIs on these traits, suggesting avenues for reducing suicide risk in this vulnerable population.
Insights
Selective serotonin-reuptake inhibitors (SSRIs) may be linked to suicidal behavior in young individuals. Animal models studying traits like aggression and hopelessness can help uncover the mechanisms behind this SSRI side effect.
Area of Science:
- Neuroscience
- Pharmacology
- Psychiatry
Background:
- Selective serotonin-reuptake inhibitors (SSRIs) are widely used antidepressants.
- Concerns exist regarding SSRI association with suicidal thinking and behavior, particularly in pediatric and young adult populations.
- Limited experimental research has explored the underlying mechanisms of this potential side effect.
Purpose of the Study:
- To investigate the potential mechanisms linking SSRIs to suicidal thinking and behavior.
- To explore the utility of animal models in understanding SSRI-associated suicidality.
- To identify potential strategies for mitigating suicide risk in vulnerable populations.
Main Methods:
- Utilizing animal models to study traits associated with human suicide, such as aggression, impulsivity, irritability, and hopelessness.
- Examining the impact of SSRIs on these specific behavioral traits in preclinical models.
- Cross-species comparison of behavioral traits relevant to suicidal ideation and behavior.
Main Results:
- Animal models can successfully replicate traits linked to human suicidal behavior.
- SSRIs' effects on aggression, impulsivity, irritability, and hopelessness can be studied in these models.
- This approach offers a framework for understanding SSRI mechanisms related to suicidality.
Conclusions:
- Animal models provide a valuable tool for elucidating the mechanisms by which SSRIs may influence suicidal thinking and behavior.
- Investigating SSRI effects on aggression, impulsivity, irritability, and hopelessness in rodents can inform strategies to reduce suicide risk.
- Further research in this area is crucial for enhancing patient safety and treatment efficacy.
