Pharmacogenetic Treatment With Anti-Glutaminergic Agents for Comorbid PTSD & AUD

Sponsor
University of Maryland, Baltimore (Other)
Overall Status
Active, not recruiting
CT.gov ID
NCT02884908
Collaborator
National Institute on Alcohol Abuse and Alcoholism (NIAAA) (NIH)
252
1
4
73
3.5

Study Details

Study Description

Brief Summary

The primary study objective is to determine the efficacy of pregabalin administered orally for a period of 12 weeks in reducing risky drinking and symptoms of posttraumatic stress disorder who have selected genotypes at the gamma-amino butyric acid transporter and receptor genes. The secondary objective is to assess the safety and tolerability of pregabalin in participants with alcohol use disorder and co-occurring posttraumatic stress disorder who have selected genotypes at the gamma-amino butyric acid transporter and receptor genes. The investigators will utilize a sample of African-Americans that includes both genders and individuals with different types of trauma.

Condition or Disease Intervention/Treatment Phase
  • Drug: Pregabalin plus BBCET
  • Other: Placebo plus BBCET
Phase 3

Detailed Description

Nearly 60% of individuals with posttraumatic stress disorder (PTSD) have a comorbid alcohol use disorder (AUD). This comorbidity is associated with more severe PTSD symptoms, higher rates of psychosocial and medical problems, higher relapse rates, and poorer treatment outcome. Pre-clinical studies have indicated that PTSD and AUD share common molecular underpinnings. Particularly, the adaptations in the brain neurotransmitter systems to chronic excessive drinking that are evident during alcohol withdrawal share similarities with PTSD cluster B and E symptoms (characterized by symptoms of re-experiencing and hyper-arousal), which initiate a cycle of relapse into excessive drinking and worsening of PTSD symptoms. Excessive glutamate and reduced gamma-amino butyric acid (GABA) neurotransmitter concentrations were found in various brain regions in individuals with co-morbid PTSD/AUD. The anticonvulsant pregabalin (with high affinity for the alpha-2-delta auxiliary site of voltage gated calcium channels) that modulates the effects of the GABA transporter (GAT-1) and increases its density of GABA, has shown preliminary efficacy in reducing drinking in AUD with comorbid generalized anxiety disorder, and improves outcomes from PTSD. Large scale studies with ample statistical power in VA settings and community populations, with diverse combat and non-combat related trauma, are now warranted to evaluate the promising preliminary evidence that pregabalin can improve outcomes for those with AUD and PTSD. An important personalized medicine approach to optimize pregabalin efficacy would be to select individuals with AUD and PTSD with genetic variation at the GAT-1 transporter so as to match its potential therapeutic effects with specific types of individual. In African-Americans, variants at the SLC6A1 gene promoter region insertion (i.e., non-insertion/insertion or insertion/insertion (NI/I or I/I) compared with those of Non-insertion/Non-insertion (NI/NI) type have significantly higher levels of GAT-1promoter activity. The investigators will, therefore, segregate our target sample by genetic variation at the GAT-1 transporter. Because of the low allelic frequency of individuals with the double copy insertion, the investigators will combine these into one group with those with the single copy (i.e., NI/I/II).

This study will test the efficacy of pregabalin in reducing both alcohol consumption and PTSD symptoms in 2 treatment groups of medication (pregabalin 450 mg/day and placebo) x 2 genetic variants (NI/I/II vs. NI/NI) in a double- blind, placebo-controlled 14-week clinical trial (screening, 12 weeks of study medication, follow-up call). After a one-week screening period, pregabalin dose (and placebo) will be titrated to the target dose from baseline to week 3 using a double-dummy procedure to ensure equivalence of capsules received. The investigators will utilize a sample of African-American participants with co-occurring AUD and PTSD that includes both genders and individuals with different types of trauma. Participants will receive standardized discussions to enhance compliance with study medication at all visits.

The specific aims are:

Specific Aim 1: Independent of race, to test the hypothesis that AUD/PTSD participants treated with pregabalin will demonstrate a greater reduction in heavy drinking than placebo treated participants.

Specific Aim 2: Independent of race, to test the hypothesis that AUD/PTSD participants treated with pregabalin will demonstrate a greater reduction in PTSD cluster B or E symptoms (or both) than placebo-treated participants.

Specific Aim 3: To test the hypothesis that race will moderate the effects of pregabalin examined in Aims 1 and 2.

Specific Aim 4: To test the hypothesis that the treatment responses to pregabalin specified in Aims 1 and 2 are modulated by genetic variations within SLC6A1 gene in AUD/PTSD in both AA and EA populations.

Study Design

Study Type:
Interventional
Anticipated Enrollment :
252 participants
Allocation:
Randomized
Intervention Model:
Factorial Assignment
Masking:
Quadruple (Participant, Care Provider, Investigator, Outcomes Assessor)
Primary Purpose:
Treatment
Official Title:
Pharmacogenetic Treatment With Anti-Glutaminergic Agents for Comorbid PTSD & AUD
Study Start Date :
Sep 1, 2016
Anticipated Primary Completion Date :
Oct 1, 2022
Anticipated Study Completion Date :
Oct 1, 2022

Arms and Interventions

Arm Intervention/Treatment
Experimental: Pregabalin + BBCET - NI/I/II type

This group will be comprised of subjects with the NI/I/II type who receive study medication (Pregabalin) and Brief Behavioral Compliance Enhancement Treatment (BBCET).

Drug: Pregabalin plus BBCET
Medication; BBCET = Brief Behavioral Compliance Enhancement Treatment
Other Names:
  • Lyrica
  • Experimental: Pregabalin + BBCET - NI/NI type

    This group will be comprised of subjects with the NI/NI type who receive study medication (Pregabalin) and Brief Behavioral Compliance Enhancement Treatment (BBCET).

    Drug: Pregabalin plus BBCET
    Medication; BBCET = Brief Behavioral Compliance Enhancement Treatment
    Other Names:
  • Lyrica
  • Placebo Comparator: Placebo + BBCET - NI/I/II type

    This group will be comprised of subjects with the NI/I/II type who receive placebo and Brief Behavioral Compliance Enhancement Treatment (BBCET).

    Other: Placebo plus BBCET
    Placebo; BBCET = Brief Behavioral Compliance Enhancement Treatment

    Placebo Comparator: Placebo + BBCET - NI/NI type

    This group will be comprised of subjects with the NI/NI type who receive placebo and Brief Behavioral Compliance Enhancement Treatment (BBCET).

    Other: Placebo plus BBCET
    Placebo; BBCET = Brief Behavioral Compliance Enhancement Treatment

    Outcome Measures

    Primary Outcome Measures

    1. Drinking variables as measured by the Time Line Follow Back (TLFB) [90 days]

      Drinking variables will be derived from the data collected by the TLFB interview.

    2. PTSD total symptoms as measured by the PTSD Checklist for DSM-5 (PCL-5) [90 days]

      PTSD total symptoms will be derived from the data collected with the PCL-5.

    3. PTSD Cluster B symptoms as measured by the CAPS-5 [90 days]

      PTSD Cluster B symptoms pre- and post-TQD will be derived from the data collected with the CAPS-5.

    4. PTSD Cluster E symptoms as measured by the CAPS-5 [90 days]

      PTSD Cluster E symptoms pre- and post-TQD will be derived from the data collected with the CAPS-5.

    Eligibility Criteria

    Criteria

    Ages Eligible for Study:
    18 Years to 65 Years
    Sexes Eligible for Study:
    All
    Accepts Healthy Volunteers:
    No
    Inclusion Criteria:
    1. Males and females of self-reported European or African American ancestry who have given written informed consent

    2. Age 18 to 65 years and weighing within 30% of their ideal body weight (Metropolitan Life Tables). Also, subjects must weigh at least 40 kg and no more than 155 kg.

    3. Good physical health as determined by a complete physical examination, an EKG within normal limits, and laboratory screening tests within acceptable parameters (see exclusion criteria)

    4. Current Diagnostic and Statistical Manual of Mental Disorders Version 5 (DSM-5) diagnosis of posttraumatic stress disorder (PTSD)

    5. Current DSM-5 diagnosis of alcohol use disorder (AUD) of moderate or greater severity (i.e., 4 or more AUD criteria endorsed) in the last 3 months

    6. Currently drinking ≥21 alcohol units/week for women and ≥28 alcohol units/week for men in the last 30 days and have met these criteria 7 days prior to randomization.

    7. Provide evidence of stable residence in the last month prior to enrollment in the study, and have no plans to move in the next 9 months

    8. The pregnancy test for females at intake must be negative. Additionally, women of childbearing potential must be using an acceptable form of contraception. These include: oral contraceptives, hormonal (levonorgestrel) or surgical implants, or barrier plus spermicide.

    9. Literate in English and able to read, understand, and complete the rating scales and questionnaires accurately, follow instructions, and make use of the behavioral treatments

    10. Express a wish to stop drinking

    11. Willing to participate in behavioral treatments for PTSD and AUD

    Exclusion Criteria:
    1. Any current DSM 5 psychiatric disorder other than PTSD, AUD, or Tobacco Use Disorder that warrants treatment or would preclude safe participation in the protocol

    2. Elevation of liver enzymes (SGOT), serum glutamic pyruvic transaminase (SGPT), blood urea nitrogen (BUN), or lactate dehydrogenase (LDH) greater than four times the upper limit of the normal range, or elevated bilirubin

    3. Severe alcohol withdrawal symptoms that, in the physician's opinion, require inpatient treatment

    4. Serious medical comorbidity requiring medical intervention or close supervision, or any condition that can interfere with the receipt of topiramate

    5. Severe or life-threatening adverse reactions to medications in the past or during this clinical trial

    6. Female subjects who are pregnant, lactating, or not adhering to an acceptable form of contraception at any time during the study

    7. Received inpatient or outpatient treatment for alcohol dependence within the last 30 days

    8. Compelled to participate in an alcohol treatment program to maintain their liberty

    9. Members of the same household

    10. Active tuberculosis

    11. Concurrent treatment with any medications having a potential effect on alcohol consumption and related behaviors, or mood. These include: opioid antagonists (e.g., naltrexone), glutamate antagonists (e.g., topiramate or acamprosate), serotonin reuptake inhibitors (e.g., fluoxetine), serotonin antagonists (e.g., ritanserin or buspirone), other antidepressants (e.g., tricyclic antidepressants or monoamine oxidase inhibitors), dopamine antagonists (e.g., haloperidol), calcium channel antagonists (e.g., isradipine), or compounds with actions similar to disulfiram (Antabuse®) or nicotine.

    12. Before double-blind randomization, urine positive for opiates, cocaine, amphetamines, barbiturates, benzodiazepines, or prescription or non-prescription drugs

    Contacts and Locations

    Locations

    Site City State Country Postal Code
    1 University of Maryland School of Medicine Baltimore Maryland United States 21228

    Sponsors and Collaborators

    • University of Maryland, Baltimore
    • National Institute on Alcohol Abuse and Alcoholism (NIAAA)

    Investigators

    None specified.

    Study Documents (Full-Text)

    None provided.

    More Information

    Publications

    Responsible Party:
    Melanie Bennett, Professor, University of Maryland, Baltimore
    ClinicalTrials.gov Identifier:
    NCT02884908
    Other Study ID Numbers:
    • 00069465
    • 5R01AA024760
    First Posted:
    Aug 31, 2016
    Last Update Posted:
    Apr 5, 2022
    Last Verified:
    Mar 1, 2022
    Individual Participant Data (IPD) Sharing Statement:
    Yes
    Plan to Share IPD:
    Yes
    Additional relevant MeSH terms:

    Study Results

    No Results Posted as of Apr 5, 2022