A Phase 1/2 interventional study of Placebo and GLWL-01 in Alcohol Use Disorder, sponsored by National Institute on Drug Abuse (NIDA). Completed at 1 site in United States. Open to participants aged 18 Years to 70 Years. Per ClinicalTrials.gov, last updated 2025-01-15.
Sponsored by National Institute on Drug Abuse (NIDA) · Phase 1/2, Interventional, and Treatment
Background:
People with alcohol use disorder (AUD) have trouble controlling their drinking. Medications can help some people with AUD but are not effective for many others. Researchers want to test new drugs to better treat the disease.
Objective:
To see if the investigational drug GLWL-01 is safe to use in people with alcohol problems. Also, to find out if the drug reduces the urge to drink alcohol.
Eligibility:
People ages 18-70 with Alcohol Use Disorder (AUD)
Design:
Participants will be screened under protocol 06-DA-N415.
Participants will be admitted to the inpatient facility, Clinical Research Unit (CRU) on the Johns Hopkins Bayview Medical Center for up to 21 days. They may leave the CRU on specified days pending approval. All their meals will be provided. They cannot drink alcohol.
Participants will take either the study drug or a placebo by mouth twice daily. They will not know which they are receiving.
Participants will complete many questionnaires.
Participants may have urine tests.
Participants will complete tasks on a computer.
Participants will have blood samples obtained on some study days.
Participants will taste and indicate their preference for sweet liquids.
Participants' blood pressure, pulse, respiratory rate, body temperature and weight, heart rate and rhythm will be measured.
Participants will have breath testing to obtain information about smoking.
Participants will be exposed to alcohol cues, water, and food cues in a bar-like room. Cues are things that might make them feel the urge to eat or drink alcohol.
Participants will take part in a virtual buffet experiment - They will wear a virtual reality headset, walk around a virtual room, and select virtual food and drink.
Background and Objective: Acyl-ghrelin is a 28-amino acid peptide that stimulates appetite and food intake. It is an endogenous ligand for the growth hormone secretagogue receptor (GHS-R1a). Preclinical studies suggest that acyl-ghrelin increases alcohol intake and decreases in acyl-ghrelin and GHS-R1a function suppresses alcohol consumption. Furthermore, previous human studies indicate a positive correlation between endogenous ghrelin levels and alcohol craving and drinking. In clinical studies conducted by our group with individuals with AUD, intravenous (IV) acyl-ghrelin administration, versus placebo 1) increased alcohol craving during alcohol cue-exposure and 2) increased IV alcohol self-administration as well as decreased latency to first infusion of alcohol and 3) increased brain activation in the amygdala in anticipation of alcohol reward.
Together, this preclinical and human data suggest that manipulating the ghrelin signal may be a novel and potentially effective pharmacological approach to treat individuals with alcohol use disorder.
After the discoveries of GHS-R1a and acyl-ghrelin, a next step was identifying ghrelin O-acyltransferase (GOAT) the enzyme that catalyzes the conversion of des-acyl-ghrelin (DAG) to acyl-ghrelin via octanoylation. GOAT is thus the master switch for the ghrelin system , as acyl-ghrelin, not DAG, is biologically active at the GHSR-1a. GOAT s structure is highly conserved, is produced by endocrine cells in the stomach and is co-expressed with ghrelin. Therefore, GOAT is a promising target for manipulating the ghrelin system by altering the peripheral acyl-to-total ghrelin ratio (where total ghrelin = acyl-ghrelin + DAG). Recently, the ghrelin system has been investigated as a potential treatment target for AUDs.
As such, an oral bioavailable GOAT inhibitor offers encouraging potential as a treatment for alcohol use disorder. GLWL-01 is an existing GOAT inhibitor for which GLWL Research Inc. has recently and successfully completed a first-in-human safety clinical trial. The goal of this protocol is to conduct a proof-of-concept human laboratory study to assess a potential early signal of efficacy of GLWL-01 in relation to alcohol-related outcomes.
Study population: Males and females (N = 43) with alcohol use disorder.
Study Design: A within-subject, counterbalanced, double-blind, placebo-controlled study. Participants will take GLWL-01 450 mg b.i.d. or matched placebo for a minimum of 4 days (Stage I). After a minimum 2 day wash-out window, Stage II will take place during which the counterbalanced study drug will be administered for a minimum of 4 days.
Primary outcome measure: The co-primary aims will be to determine whether: 1) the number of adverse events (AEs) experienced differ in the GLWL-01 condition, compared to placebo; and 2) GLWL-01, compared to placebo, reduces alcohol cue-elicited craving using a validated alcohol cue-reactivity procedure.
Secondary outcome measures: The main secondary aim will be the effects of GLWL-01 on food choices using a virtual buffet experimental procedure. We will also monitor a wide range of behavioral measures including e.g., pain, anxiety, depression, alcohol craving and withdrawal, and smoking.
1,606 studies on the registry are indexed under Alcoholism; 329 are open to participants now.
This study's enrollment of 21 is below the median of 87 across 1,371 interventional studies indexed under Alcoholism.
Browse Alcoholism studies →National Institute on Drug Abuse (NIDA) is the lead sponsor of 388 studies on the registry; 19 are open to participants now.
Of its 12 completed or terminated interventional studies of FDA-regulated products, 5 (42%) have results posted.
Counted across the registry records on this site, refreshed daily.
Males only:
-Males agrees agree to sexual abstinence or to use a reliable method of birth control during the study and three months following the last dose of the study drug. Acceptable methods of birth control may include: 1) condom with spermicide; 2) diaphragm with spermicide; or 3) female condom with spermicide.
Females only:
-Women of child-bearing potential may participate in the study:
they must also agree to use either one highly effective method of contraception or a combination of two effective methods of contraception during the study.
Women may choose to use a double-barrier method of contraception. Barrier methods without concomitant use of a spermicide are not reliable or an acceptable method. Thus, each barrier method must include use of a spermicide. It should be noted that the use of male and female condoms as a double-barrier method is not considered acceptable due to the high failure rate when these methods are combined.
OR
-Women not of child-bearing potential may participate in the study and include those who have
EXCLUSION CRITERIA:
NOTE: individuals who have a history of alcohol withdrawal seizures may be in the study as long as they have been abstinent from alcohol for at least 2 weeks prior to consent and during that period of abstinence, there were no seizure episodes (otherwise, participant remains not eligible).
Unable to refrain from or anticipates the use of:
The doses of these statins in combination products should not exceed these defined dose levels.
These criteria are based on the target population for this study. Other criteria are consistent with an ongoing study that GLWL Research Inc. is conducting with GLWL-01 in patients with Prader-Willi Syndrome (ClinicalTrials.gov NCT03274856).
Participants receive GLWL-01 450 mg orally twice daily for a minimum of four days (Stage I) followed by a minimum of two day wash-out period then placebo orally twice daily for a minimum of four days (stage II).
Other: Placebo · Drug: GLWL-01
Participants receive placebo orally twice daily for a minimum of four days (Stage I) followed by a minimum of two day wash-out period then GLWL-01 450 mg orally twice daily for a minimum of four days (stage II).
Other: Placebo · Drug: GLWL-01
Participants receive Placebo orally twice daily.
GLWL-01 is a ghrelin O-acyltransferase (GOAT) inhibitor. Participants receive GLWL-01 orally twice daily.
Number of Participants With Adverse Events (AEs)
Number of participants with adverse events related to intervention. Adverse events were collected from participants self reporting.
Time frame: Up to one month
Alcohol Cue-elicited Craving Assessed in a "Bar-like" Laboratory
Alcohol cue elicited craving was measured using the Alcohol Urges Questionnaire (AUQ). The AUQ is an 8-item self-administered instrument that assesses craving for alcohol among alcohol users in the current context (i.e., right now). The score ranges from 8 (lowest craving value) to 56 (highest craving value). Higher score indicated higher alcohol craving. AUQ was collected on each initial dosing days (2-3 days), the virtual reality buffet day (1 day), the cue-reactivity day (1 day), and the final study day (1 day), for a total of 5-6 days per intervention. The least squares average for each intervention was calculated using a linear mixed effects model including a random intercept for each participant.
Time frame: AUQ scores were collected 5-6 days per intervention [initial dosing days (2-3 days), the virtual reality buffet day (1 day), the cue-reactivity day (1 day), and the final study day (1 day)]
| Milestone | GLWL-01, Then Placebo | Placebo, Then GLWL-01 |
|---|---|---|
| Started | 11 | 10 |
| Completed | 9 | 9 |
| Not completed | 2 | 1 |
| Withdrew: Withdrawal by subject | 1 | 0 |
| Withdrew: Physician decision | 1 | 1 |
| Milestone | GLWL-01, Then Placebo | Placebo, Then GLWL-01 |
|---|---|---|
| Started | 9 | 9 |
| Completed | 6 | 8 |
| Not completed | 3 | 1 |
| Withdrew: Physician decision | 3 | 1 |
| Milestone | GLWL-01, Then Placebo | Placebo, Then GLWL-01 |
|---|---|---|
| Started | 6 | 8 |
| Completed | 6 | 7 |
| Not completed | 0 | 1 |
| Withdrew: Physician decision | 0 | 1 |
Number of participants with adverse events related to intervention. Adverse events were collected from participants self reporting.
| Participants | GLWL-01 | Placebo |
|---|---|---|
| Number of Participants With Adverse Events (AEs) | 18 | 15 |
Alcohol cue elicited craving was measured using the Alcohol Urges Questionnaire (AUQ). The AUQ is an 8-item self-administered instrument that assesses craving for alcohol among alcohol users in the current context (i.e., right now). The score ranges from 8 (lowest craving value) to 56 (highest craving value). Higher score indicated higher alcohol craving. AUQ was collected on each initial dosing days (2-3 days), the virtual reality buffet day (1 day), the cue-reactivity day (1 day), and the final study day (1 day), for a total of 5-6 days per intervention. The least squares average for each intervention was calculated using a linear mixed effects model including a random intercept for each participant.
| units on a scale | GLWL-01 | Placebo |
|---|---|---|
| Alcohol Cue-elicited Craving Assessed in a "Bar-like" Laboratory | 17.8 ± 2.17 | 19.8 ± 2.19 |
Collected over Up to one month. Non-serious events are listed at a 0% frequency threshold.
| Group | Deaths | Serious | Other |
|---|---|---|---|
| GLWL-01 | 0/21 (0%) | 0/21 (0%) | 18/21 (85.7%) |
| Placebo | 0/21 (0%) | 0/21 (0%) | 15/21 (71.4%) |
| Event | GLWL-01 | Placebo |
|---|---|---|
| FatigueGeneral disorders | 5/21 | 8/21 |
| Abdominal distensionGastrointestinal disorders | 7/21 | 2/21 |
| HeadacheNervous system disorders | 6/21 | 3/21 |
| InsomniaNervous system disorders | 6/21 | 5/21 |
| Alanine aminotransferase increasedInvestigations | 2/21 | 5/21 |
| Electrocardiogram QT interval abnormalInvestigations | 5/21 | 2/21 |
| SomnolenceNervous system disorders | 1/21 | 5/21 |
| DyspepsiaGastrointestinal disorders | 4/21 | 0/21 |
| NauseaGastrointestinal disorders | 4/21 | 1/21 |
| HaematomaVascular disorders | 1/21 | 4/21 |
| Age, Categorical(Participants) | All Study Participants |
|---|---|
| <=18 years | 0 |
| Between 18 and 65 years | 20 |
| >=65 years | 1 |
| Sex: Female, Male(Participants) | All Study Participants |
|---|---|
| Female | 6 |
| Male | 15 |
| Ethnicity (NIH/OMB)(Participants) | All Study Participants |
|---|---|
| Hispanic or Latino | 2 |
| Not Hispanic or Latino | 18 |
| Unknown or Not Reported | 1 |
| Race (NIH/OMB)(Participants) | All Study Participants |
|---|---|
| American Indian or Alaska Native | 0 |
| Asian | 2 |
| Native Hawaiian or Other Pacific Islander | 0 |
| Black or African American | 13 |
| White | 5 |
| More than one race | 1 |
| Unknown or Not Reported | 0 |
| Region of Enrollment(participants) | All Study Participants |
|---|---|
| United States | 21 |
Documents are hosted by the registry — open the source record to download them.
Plan to share: Yes — .Data sharing with other protocols. Data obtained under this protocol and the National Institute on Drug Abuse (NIDA) screening protocol may be shared and combined for analysis. This will also allow us to avoid repeating assessments that are scheduled in both protocols during the same period of time, therefore avoiding duplication and minimizing participant fatigue. Participants may also consent for other NIH protocols and data collected under those protocols may be combined with data from this protocol for exploratory purposes. This protocol does not meet criteria for genomic data sharing. NIH Human Data Sharing (HDS) policy is not applied in this protocol because it is limited by the agreement (CRADA) with GLWL Research Inc.
Supporting information: Study protocol, Sap, Csr
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