期刊
BIOLOGICAL PSYCHIATRY
卷 67, 期 2, 页码 175-181出版社
ELSEVIER SCIENCE INC
DOI: 10.1016/j.biopsych.2009.07.039
关键词
Cortisol; HPA; monkey; PET; stress; subgenual PFC
资金
- Harlow Center for Biological Psychology
- Wisconsin National Primate Research Center [RR000167]
- HealthEmotions Research Institute
- Meriter Hospital
- National Science Foundation Graduate Student Fellowship
- National Institute of Mental Health [K08 MH074715]
- [MH46729]
- [MH69315]
- [MH84051]
Background: Hypothalamic-pituitary-ad renal (HPA) system activation is adaptive in response to stress, and HPA dysregulation occurs in stress-related psychopathology. It is important to understand the mechanisms that modulate HPA output, yet few studies have addressed the neural circuitry associated with HPA regulation in primates and humans. Using high-resolution F-18-fluorodeoxyglucose positron emission tomography (FDG-PET) in rhesus monkeys, we assessed the relation between individual differences in brain activity and HPA function across multiple contexts that varied in stressfulness. Methods: Using a logical AND conjunctions analysis, we assessed cortisol and brain metabolic activity with FDG-PET in 35 adolescent rhesus monkeys exposed to two threat and two home-cage conditions. To test the robustness of our findings, we used similar methods in an archival data set. In this data set, brain metabolic activity and cortisol were assessed in 17 adolescent male rhesus monkeys that were exposed to three stress-related contexts. Results: Results from the two studies revealed that subgenual prefrontal cortex (PFC) metabolism (Brodmann's area 25/24) consistently predicted individual differences in plasma cortisol concentrations regardless of the context in which brain activity and cortisol were assessed. Conclusions: These findings suggest that activation in subgenual PFC maybe related to HPA output across a variety of contexts (including familiar settings and novel or threatening situations). Individuals prone to elevated subgenual PFC activity across multiple contexts may be individuals who consistently show heightened cortisol and may be at risk for stress-related HPA dysregulation.
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