Approach-Avoidance and Alcohol Challenge Study in PTSD

NCT ID: NCT06002633

Last Updated: 2025-04-02

Basic Information

• Recruitment Status: RECRUITING
• Clinical Phase: NA
• Total Enrollment: 200 participants
• Study Classification: INTERVENTIONAL
• Study Start Date: 2023-10-23
• Study Completion Date: 2028-05-31

Brief Summary

Individuals with posttraumatic stress disorder (PTSD) have greater prevalence of alcohol use disorders (AUDs), with this comorbidity associated with worse illness outcomes, yet there remains limited mechanistic understanding of how PTSD confers risk for AUD. Understanding risk factors that associate with and predict the development of AUDs in PTSD could inform interventions and prevention efforts to reduce the rate of this comorbidity and improve outcomes of both disorders. Identifying predictors of risk requires longitudinal studies in PTSD aimed at capturing the mechanisms leading to the emergence of AUDs. There is growing evidence PTSD is related to biased decision-making during approach-avoidance conflict. Alcohol is also suggested to alter approach-avoidance decision-making. AUDs and acute alcohol intoxication is associated with a bias to seek out reward despite the possibility of threat (e.g., contributing to relapse following alcohol cue exposure and risky behavior during intoxication respectively). Alcohol-induced changes in approach-avoidance decision-making have not been investigated in the context of PTSD, but emerging data support the investigators' hypothesis that an interaction between alcohol and approach-avoidance conflict in PTSD may occur and contribute to risk for alcohol misuse and development of alcohol problems. No current data, cross-sectional or longitudinal, have tested the role of alcohol-induced changes in approach-avoidance conflict as a mechanism of risk for AUD among individuals with PTSD. To address this gap, the investigators propose to leverage the group's expertise in placebo-controlled alcohol administration procedures, longitudinal modeling, functional neuroimaging, and computational neuroscience approaches to investigate the effects of acute alcohol on approach-avoidance decision-making and mediating changes in multivariate neurocircuitry patterns in limbic, striatal, and salience networks.

Detailed Description

The proposed study will test the conceptual model positing that acute alcohol alters the relative bias in computational mechanisms for threat vs reward, thereby decreasing avoidance to threat and increasing approach to reward in adults with PTSD, and through this mechanism increases risk for heavier alcohol use over time. Research aims are to identify alcohol-induced changes in approach-avoidance decision-making and mediating neural networks that predict alcohol use and symptoms of AUDs over a one-year follow-up period in adults with PTSD, compared to adults with interpersonal violence exposure but no PTSD and healthy comparison adults. Essential to successfully improving clinical prognosis in PTSD are research results that enable better prediction, diagnosis, and treatment based on the individual. There is a paucity of human clinical research investigating interactions between acute alcohol exposure and PTSD that may drive risk for development of AUDs following trauma. Data could identify brain and behavioral mechanisms explaining how alcohol alters an important domain of PTSD contributing to risk for alcohol misuse and development of alcohol problems. Results could pave way for development of novel behavioral and pharmacological methods to treat PTSD and decrease risk for developing comorbid AUDs.

Conditions

Post-Traumatic Stress Disorder; Alcohol Drinking

Study Design

• Allocation Method: RANDOMIZED
• Intervention Model: CROSSOVER
• Primary Study Purpose: PREVENTION
• Blinding Strategy: NONE

Study Groups

Alcohol

Participants will drink beverages containing alcohol.

Group Type: ACTIVE_COMPARATOR

Alcohol

Intervention Type: OTHER

Participants will consume beverages containing alcohol.

Placebo

Participants will drink beverages containing a very low dose of alcohol (placebo condition).

Group Type: PLACEBO_COMPARATOR

Placebo

Intervention Type: OTHER

Participants will consume beverages containing a very low dose of alcohol (placebo condition).

Interventions

Alcohol

Participants will consume beverages containing alcohol.

Intervention Type: OTHER

Placebo

Participants will consume beverages containing a very low dose of alcohol (placebo condition).

Intervention Type: OTHER

Eligibility Criteria

Inclusion Criteria

• between 21 and 60 years of age
• having consumed at least 4 (men) or 3 (women) drinks on at least two occasions over the last year

• Meeting diagnostic criteria for PTSD, confirmed by structured interview

Exclusion Criteria

• history of significant medical illness, particularly if possible changes in cerebral tissue
• neurologic abnormality including significant head trauma (loss of consciousness of ≥5-min)
• full Scale IQ <85
• contraindication to MRI scanning
• positive pregnancy test
• severe alcohol use disorder
• current severe cannabis use disorder
• any current substance use disorder (other than alcohol, cannabis, or nicotine)
• scores > 15 on the alcohol Use Disorders Identification Test (AUDIT; part of phone screen)
• ever being in an abstinence-oriented treatment program for alcohol use
• reporting wanting to quit drinking but not being able to
• any medical, religious, or other reasons for not drinking alcohol
• history of heart attack, heart trouble, high blood pressure, diabetes, or liver disease
• an adverse reaction to alcoholic beverages
• reporting never consuming 4 (men) or 3 (women) or more drinks on at least two occasions over the last year
• unwillingness to have a friend or family member drive them home after the alcohol administration sessions

• not taking medications for >4 weeks (i.e. participants must be stable on meds)
• acute suicidality with intent

• history of PTSD

• any prior psychiatric hospitalizations
• lifetime history of a neurodevelopmental disorder, affective disorder, psychotic disorder, suicide attempt, or eating disorder
• greater than 1 month of lifetime psychotropic medication

• Minimum Eligible Age: 21 Years
• Maximum Eligible Age: 60 Years
• Eligible Sex: ALL
• Accepts Healthy Volunteers: Yes

Sponsors

University of Texas at Austin

OTHER

Sponsor Role: lead

Responsible Party

Elizabeth Thomas Cox Lippard

Associate Professor

Responsibility Role: PRINCIPAL_INVESTIGATOR

Principal Investigators

Elizabeth Lippard, PhD

Role: PRINCIPAL_INVESTIGATOR

University of Texas at Austin

Josh Cisler, PhD

Role: PRINCIPAL_INVESTIGATOR

University of Texas at Austin

Locations

University of Texas at Austin

Austin, Texas, United States

Site Status: RECRUITING

Countries

United States

Central Contacts

Research Coordinator

Role: CONTACT

behavioral.neuroimaging@austin.utexas.edu

5124955198

Facility Contacts

Research Coordinator

Role: primary

behavioral.neuroimaging@austin.utexas.edu

(512) 495-5198

Other Identifiers

R01AA030740

Identifier Type: NIH

Identifier Source: org_study_id

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