Abstract：
:Serotonin (5-HT) and testosterone (T) have both been implicated in the regulation of aggression. Findings in humans however are very inconclusive, with respect to main effects of either system. Animal models implicate T to modulate 5-HT system activity, and furthermore have shown behaviorally relevant interactions of T and 5-HT with respect to aggression. We tested for associations between habitual T-level and 5-HT system activity, as well as behaviorally relevant interactions of T and 5-HT with respect to trait aggression in 48 healthy male and female subjects. 5-HT activity was measured by means of neuroendocrine challenge paradigm with S-citalopram. T-levels were measured in saliva samples. Trait aggression was assessed by self-report measures. T-levels were not associated with indices of central 5-HT activity. Results showed significant interaction effects between 5-HT and T for trait aggression in men only (p<0.05). Trait aggression was significantly higher in the combinations "high T+high cortisol responses" (indicating decreased 5-HT availability), and "low T+low cortisol responses" (indicating increased 5-HT availability), after S-citalopram. Results support the notion of behaviorally relevant interactions between T and 5-HT, with respect to aggression in humans, but also indicate the need for further studies.
journal_name
Behav Brain Resjournal_title
Behavioural brain researchauthors
Kuepper Y,Alexander N,Osinsky R,Mueller E,Schmitz A,Netter P,Hennig Jdoi
10.1016/j.bbr.2009.09.006subject
Has Abstractpub_date
2010-01-05 00:00:00pages
93-100issue
1eissn
0166-4328issn
1872-7549pii
S0166-4328(09)00521-Xjournal_volume
206pub_type
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