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Central serotonin and impulsive aggression.

¹Department of Psychiatry, Eastern Pennsylvania Psychiatric Institute, Medical College of Pennsylvania, Philadelphia.

The British Journal of Psychiatry. Supplement

|December 1, 1989

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Central serotonin (5-HT) system dysfunction is linked to aggression. Reduced 5-HT activity correlates with increased aggression in humans and animals, suggesting potential therapeutic targets for impulsive behaviors.

Area of Science:

Neuroscience
Psychiatry
Pharmacology

Background:

Central serotonergic (5-HT) system dysfunction is implicated in aggression regulation.
Decades of research link reduced 5-HT to increased aggression in animal models.
Human studies show associations between reduced pre-synaptic 5-HT activity and aggression.

Purpose of the Study:

Investigate the role of central 5-HT system dysfunction in aggression.
Examine the functional status of 5-HT activity in patients with mood/personality disorders and aggressive behavior.
Explore the correlation between post-synaptic 5-HT receptor activity and impulsive aggression.

Main Methods:

Behavioral and correlative studies in animals and humans.
Neuroendocrine response assessment (e.g., prolactin) to fenfluramine (a 5-HT uptake inhibitor/releaser).

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Preliminary investigation using the 5-HT receptor agonist m-chlorophenylpiperazine.

Main Results:

Reduced central 5-HT activity is associated with increased aggression.
Reduced neuroendocrine responses to fenfluramine suggest overall reduced central 5-HT activity in patients with suicidal/impulsive aggressive behavior.
Preliminary data indicate reduced post-synaptic 5-HT receptor activity may correlate with impulsive aggression.

Conclusions:

Central 5-HT system dysfunction plays a significant role in aggression.
Reduced central 5-HT activity is a key factor in mood/personality disorders with aggressive behavior.
Pharmacological agents enhancing 5-HT pre- and/or post-synaptic activity warrant clinical trials for treating impulsive aggression.