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Biomarkers in an Animal Model for Revealing Neural, Hematologic, and Behavioral Correlates of PTSD
Published on: October 10, 2012
Neuroendocrinology of post-traumatic stress disorder
Panagiota Pervanidou1, George P Chrousos
1Developmental and Behavioral Pediatrics Unit, First Department of Pediatrics, Athens University Medical School, Agia Sophia Children's Hospital, Goudi, Athens, Greece. ppervanid@med.uoa.gr
Progress in Brain Research
|June 15, 2010
Summary
Post-traumatic stress disorder (PTSD) involves stress system dysregulation. While the hypothalamic-pituitary-adrenal (HPA) axis shows varied activity, the sympathetic nervous system (SNS) is consistently hyperactive in PTSD patients.
Area of Science:
- Neuroendocrinology
- Psychiatry
- Stress Physiology
Background:
- Post-traumatic stress disorder (PTSD) is linked to dysregulation of the hypothalamic-pituitary-adrenal (HPA) axis and the sympathetic nervous system (SNS).
- Neuroendocrine studies in PTSD reveal complex HPA axis activity, with inconsistent peripheral cortisol measurements.
- In contrast, peripheral SNS biomarkers consistently show increased catecholamines in PTSD.
Purpose of the Study:
- To review the neuroendocrine mechanisms underlying PTSD pathophysiology.
- To elucidate the role of HPA axis and SNS dysregulation in PTSD.
- To discuss the implications of chronic hormonal disturbances in PTSD.
Main Methods:
- Review of neuroendocrine studies in individuals with PTSD.
- Analysis of cerebrospinal fluid and peripheral measurements of stress hormones.
- Examination of factors influencing HPA axis activity in PTSD.
Main Results:
- Elevated basal cerebrospinal fluid corticotropin-releasing hormone in PTSD.
- Contradictory peripheral cortisol levels (low, normal, or high) in PTSD patients.
- Consistently elevated peripheral catecholamines (SNS markers) in PTSD patients compared to controls.
Conclusions:
- HPA axis dysregulation in PTSD is complex and influenced by multiple factors.
- SNS hyperactivity is a more consistent finding in PTSD.
- Chronic hormonal imbalances in PTSD may contribute to brain changes, behavioral symptoms, and increased cardiometabolic risk.
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