Treatment of PTSD by Reduction of Traumatic Memory Reconsolidation by Propranolol : a Multisite Trial

Phase 2

Completed

• Conditions: Post-traumatic Stress Disorder
• Interventions: Drug: Propranolol; Drug: placebo; Other: Trauma reactivation

• Registration Number: NCT01713556
• Lead Sponsor: University Hospital, Toulouse

Brief Summary

The purpose of this study is to test whether propranolol, when given during a re-evocation of a traumatic memory, is capable of reducing subsequent PTSD symptoms associated with that memory.

Detailed Description

Post-traumatic stress disorder (PTSD) develops following an exposure to a life threatening event. One of the characteristic features of PTSD is the recurrence of intrusive memories of an experienced trauma. The persistence of disturbing traumatic memories in PTSD is often explained in terms of a trauma-induced enhancement of memory encoding. Several studies indicate that an increased noradrenergic activity during trauma enhances the encoding of memory. Elevated levels of norepinephrine in the cerebrospinal fluid of individuals with PTSD and the correlation of this elevation with the severity of PTSD symptoms suggest that increased noradrenergic activity is also involved in the maintenance of PTSD symptoms. Reactivation of memory by retrieval also renders the memory labile and susceptible to treatments. This latter process is referred to as memory reconsolidation. Consolidation and reconsolidation both occur within a distinct time window following new learning (in consolidation) and/or retrieval (in reconsolidation). Even well-consolidated old fear memories undergo reconsolidation and may be disrupted by means of pharmacological manipulation. Propranolol may be effective in treating PTSD long after symptoms have been consolidated. Propranolol given after reactivation of the memory of a past traumatic event reduces physiologic responding during subsequent mental imagery of the event.

HYPOTHESE: Subjects with chronic PTSD who receive propranolol before trauma evocation will subsequently show decreased PTSD symptoms, compared to subjects who receive a placebo.

METHOD: 56 participants with chronic PTSD will be recruited for participation. On Week 1, the subjects will complete a standardized measure of PTSD symptoms. Next, 90 minutes after the administration of the study medication (either propranolol or placebo), participants will undergo a script preparation procedure, during which they will disclose details of their traumatic event. Scripts portraying this event will be prepared for subsequent replay.

On Week 2, after the administration of the study medication (either propranolol or placebo), participants will be asked (reading the script) to engaged in a script-driven mental imagery of the traumatic event. Following this procedure, PTSD symptoms will be assessed.

The same procedure will be repeated on Weeks 3, 4, 5 and 6. On Weeks 7 and 18, the standardized measure of PTSD symptoms will be repeated.

Study Timeline

• Study First Submitted: 2012-10-22
• Study First Submitted QC: 2012-10-22
• Study First Posted: 2012-10-24
• Study Start: 2012-11
• Primary Completion: 2017-05
• Study Completion: 2017-06-30
• Status Verified: 2020-11
• Last Update Submitted: 2020-11-06
• Last Update Posted: 2020-11-09

Recruitment & Eligibility

• Status: COMPLETED
• Sex: All
• Target Recruitment: 87

Inclusion Criteria

• Diagnosis of chronic PTSD
• PTSD CheckList total score >44

Exclusion Criteria

• Systolic blood pressure < 100 mmHg
• Contraindication to Propranolol
• Previous adverse reaction to a β-blocker
• Use of another β-blocker
• Use of medication that could involve potentially dangerous interactions with propranolol
• Psychotherapy or treatment with any pharmacologic PTSD medication within the 2 weeks prior to inclusion (6 weeks for fluoxetine)
• Female with reproductive potential without reliable means of contraception
• Pregnancy or lactation
• Alcohol or drug abuse

Study & Design

• Study Type: INTERVENTIONAL
• Study Design: PARALLEL

Arm && Interventions

Group	Intervention	Description
Placebo + reactivation	placebo	They have a script-driven mental imagery of the traumatic event with placebo
Propranolol + reactivation	Trauma reactivation	they have a script-driven mental imagery of the traumatic event white drug
Placebo + reactivation	Trauma reactivation	They have a script-driven mental imagery of the traumatic event with placebo
Propranolol + reactivation	Propranolol	they have a script-driven mental imagery of the traumatic event white drug

Primary Outcome Measures

Name	Time	Method
PTCD CheckList (PCL) total score.	difference between week 1 (before administration of the study medication) and week 7 (one week after the last intake of study medication)

Trial Locations

Locations (4)

Chu Montpellier; 🇫🇷 Montpellier, France

Centre Hospitalier Charles Perrens; 🇫🇷 Bordeaux, France

Chru Lille; 🇫🇷 Lille, France

CHU Toulouse; 🇫🇷 Toulouse, France