[CAN POST-TRAUMATIC STRESS DISORDER BE PREVENTED WITH GLUCOCORTICOIDS?]

Area of Science:

• Neuroscience
• Endocrinology
• Psychiatry

Background:

• Glucocorticoids (GCs) are crucial for managing stress and maintaining homeostasis.
• Inadequate GC release after stress can delay recovery and impair memory consolidation.
• Lower cortisol levels post-trauma predict subsequent PTSD symptoms, challenging conventional views.

Purpose of the Study:

• To investigate the role of GCs in susceptibility to PTSD-like behaviors using an animal model.
• To examine if exogenous cortisol administration post-trauma can alter the course of trauma exposure and promote recovery.

Main Methods:

• Utilized a well-validated animal model for PTSD.
• Administered a single dose of hydrocortisone in the acute aftermath of trauma.

Main Results:

• An initial bolus of endogenous corticosteroids is vital for returning to homeostasis after stress.
• Aberrations in GC response influence long-term brain disruptions and PTSD-like behaviors.
• A single dose of hydrocortisone post-trauma promoted recovery, enhanced synaptic plasticity, and connectivity.

Conclusions:

• Exogenous hydrocortisone administered during the 'window of opportunity' post-trauma may restore homeostasis.
• This intervention can constrain central nervous system activity, potentially serving as secondary prevention for PTSD.