The relation of developmental changes in brain serotonin transporter (5HTT) and 5HT1A receptor binding to emotional behavior in female rhesus monkeys: Effects of social status and 5HTT genotype

► 5HT1A and 5HTT BP increased in female rhesus brain regions through puberty. ► Hypothalamic 5HT1A receptor binding was increased in subordinate juvenile females. ► Higher orbitofrontal cortex 5HTT BP was detected in subordinate females. ► No main effects of 5HTT genotype were observed for 5HT1A or 5HTT BP. ► Developmental changes in 5HT systems related to different behavioral reactivity.