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Enhanced cortisol suppression in response to dexamethasone administration in traumatized veterans with and without posttraumatic stress disorder.

Abstract：

BACKGROUND:While enhanced cortisol suppression in response to dexamethasone is one of the most consistent biological findings in posttraumatic stress disorder (PTSD), the relative contribution of trauma exposure to this finding remains unclear. METHODS:Assessment of diurnal salivary cortisol levels and 1600 h salivary cortisol before and after oral administration of 0.5mg dexamethasone in veterans with PTSD, veterans without PTSD (trauma controls) and healthy controls. Assessment of 1600 h plasma cortisol, ACTH and corticotrophin binding globulin (CBG) in response to dexamethasone in PTSD patients and trauma controls. RESULTS:Both PTSD patients and trauma controls demonstrated significantly more salivary cortisol suppression compared to healthy controls. Salivary cortisol, plasma cortisol and ACTH suppression as well as CBG levels did not differ between PTSD patients and trauma controls. PTSD patients showed a reduced awakening cortisol response (ACR) compared to healthy controls that correlated significantly with PTSD symptoms. No significant differences were observed in ACR between PTSD patients and trauma controls. CONCLUSIONS:These data suggest that enhanced cortisol suppression to dexamethasone is related to trauma exposure and not specifically to PTSD. The correlation between the ACR and PTSD severity suggests that a flattened ACR may be a result of clinical symptoms.

journal_name

Psychoneuroendocrinology

journal_title

Psychoneuroendocrinology

authors

de Kloet CS,Vermetten E,Heijnen CJ,Geuze E,Lentjes EG,Westenberg HG

doi

10.1016/j.psyneuen.2006.12.009

subject

Has Abstract

pub_date

2007-04-01 00:00:00

pages

215-26

issue

3

eissn

0306-4530

issn

1873-3360

pii

S0306-4530(06)00223-X

journal_volume

32

pub_type

临床试验,杂志文章

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