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Immune and Endocrine Function in Post-Traumatic Stress Disorder

Post-Traumatic Stress Disorders Clinical Trial

Official title:
Immune and Endocrine Function in Post-Traumatic Stress Disorder

Clinical Trial Summary

This is a study investigating immune function and relationships to the hypothalamic-pituitary-adrenal (HPA) axis in Post-traumatic stress disorder (PTSD) compared to controls without PTSD. The study involves 99 adult veterans and civilian subjects over a 3 year period. The study involves measuring immune and neuroendocrine parameters from blood samples obtained before and after a dexamethasone suppression test. The aim of the study is to determine whether immune alterations exist in PTSD and whether the immune-HPA axis interactions in this disorder are different from non-PTSD subjects with the future aim of studying whether immune dysregulation in PTSD may be linked to the increased risk for medical and psychiatric comorbidity in this population.

Clinical Trial Description

The subjects undergo a thorough medical (physical and blood/urine tests) and psychiatric evaluation to determine eligibility after signed informed consent is obtained. If eligible, the subject will complete questionnaires and undergo structured clinical interviews with a study psychiatrist. The subject will then undergo a 2-day testing period during which time, blood is drawn each morning at 8 am, with the subject taking 0.5 mg of dexamethasone (a synthetic steroid) at 11 pm prior to the second day of blood testing. About 80 ml of blood will be drawn on each morning. The blood collected will then be assayed for cortisol dexamethasone, lymphocyte glucocorticoid receptor levels; cytokine levels in plasma and lipopolysaccharide stimulated and unstimulated whole blood (IL-2, sIL-2R, IL-6, sIL-6R, and IL-10); lymphocyte subsets (T helper and suppressor, B, and Natural Killer cell numbers), and antigen stimulation responses to tetanus and candida. In addition, blood from the first day of testing will undergo ex vivo challenge with dexamethasone at varying concentrations to determine differential cytokine sensitivities to steroid exposure in subjects. ;

Study Design

Time Perspective: Prospective

Related Conditions & MeSH terms

Clinical Trial Details
NCT number NCT00100490
Study type Observational
Source VA Office of Research and Development
Contact
Status Completed
Phase N/A
Start date October 1999
Completion date September 2002
View Details
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