This is a double-blind, randomized, placebo-controlled Phase 2 mechanistic clinical trial designed to evaluate the therapeutic neural mechanisms of psilocybin in patients with alcohol use disorder (AUD), and to determine whether further studies are warranted to study the relationship of any such effects to clinical improvement in AUD symptoms. The primary aims are to evaluate the effects of psilocybin on AUD; measures will include 1) fMRI neural activation and functional connectivity, using a well-validated task to characterize neural and subjective response to negative affective and alcohol visual stimuli; 2) alcohol use data (self-report and blood biomarkers); and 3) self-report measures related the NE, IS, and EF domains.
Study Type
INTERVENTIONAL
Allocation
RANDOMIZED
Purpose
TREATMENT
Masking
DOUBLE
Enrollment
200
One 25 mg capsule and one 5 mg capsule (30 mg total) administered once orally
Two matching placebo capsules administered once orally
Participants will receive three supportive therapy sessions of manual-based treatment from a Center for Psychedelic Medicine (CPM) clinician, accompanied by a Silver Hill Hospital (SHH) therapist who has an ongoing therapeutic relationship with the participant. The CPM clinician will be a licensed physician, clinical psychologist, or nurse practitioner who will be solely responsible for the content of the intervention. The SHH therapist will provide additional support and continuity with clinical treatment.
Silver Hill Hospital
New Canaan, Connecticut, United States
RECRUITINGNYU Langone Health
New York, New York, United States
RECRUITINGPercent change in the alcohol cue-induced Blood-oxygen-level dependent (BOLD) signal in the lateral prefrontal cortex (PFC)
Percentage change in the BOLD signal is the difference in fMRI signal between the baseline condition (B) and the alcohol cue-induced task condition (T); percent signal change = (T-B)/B×100%. A positive value of the percentage change in BOLD signal indicates up-regulation of BOLD signal.
Time frame: Baseline, Day 2
Percent change in the alcohol cue-induced BOLD signal change in the caudate
Percentage change in the BOLD signal is the difference in fMRI signal between the baseline condition (B) and the alcohol cue-induced task condition (T); percent signal change = (T-B)/B×100%. A positive value of the percentage change in BOLD signal indicates up-regulation of BOLD signal.
Time frame: Baseline, Day 2
Percent change in alcohol cue-induced BOLD signal change in the ventromedial PFC (vmPFC)
Percentage change in the BOLD signal is the difference in fMRI signal between the baseline condition (B) and the alcohol cue-induced task condition (T); percent signal change = (T-B)/B×100%. A positive value of the percentage change in BOLD signal indicates up-regulation of BOLD signal.
Time frame: Baseline, Day 2
Percent change in alcohol cue-induced BOLD signal change in the insula
The blood-oxygen-level-dependent (BOLD) signal, detected in fMRI, reflects changes in deoxyhemoglobin driven by localized changes in brain blood flow and blood oxygenation, which are coupled to underlying neuronal activity by a process termed neurovascular coupling.
Time frame: Baseline, Day 2
Percent change in negative affective cue-induced BOLD signal change in the dorsomedial PFC (dmPFC)
Percentage change in the BOLD signal is the difference in fMRI signal between the baseline condition (B) and the alcohol cue-induced task condition (T); percent signal change = (T-B)/B×100%. A positive value of the percentage change in BOLD signal indicates up-regulation of BOLD signal.
Time frame: Baseline, Day 2
Percent change in negative affective cue-induced BOLD signal change in the supramarginal gyrus
Percentage change in the BOLD signal is the difference in fMRI signal between the baseline condition (B) and the negative affective cue-induced task condition (T); percent signal change = (T-B)/B×100%. A positive value of the percentage change in BOLD signal indicates up-regulation of BOLD signal.
Time frame: Baseline, Day 2
Percent change in negative affective cue-induced BOLD signal change in the amygdala
Percentage change in the BOLD signal is the difference in fMRI signal between the baseline condition (B) and the negative affective cue-induced task condition (T); percent signal change = (T-B)/B×100%. A positive value of the percentage change in BOLD signal indicates up-regulation of BOLD signal.
Time frame: Baseline, Day 2
Percent change in negative affective cue-induced BOLD signal change in the insula
Percentage change in the BOLD signal is the difference in fMRI signal between the baseline condition (B) and the negative affective cue-induced task condition (T); percent signal change = (T-B)/B×100%. A positive value of the percentage change in BOLD signal indicates up-regulation of BOLD signal.
Time frame: Baseline, Day 2
Percent change in alcohol cue-induced functional connectivity in prespecified regions of interest (ROI)
ROI include the ventral striatum, lateral PFC (dlPFC and IFG), and caudate with target clusters in the PFC, ACC, and sensorimotor cortex (S1 and M1).
Time frame: Baseline, Day 2
Percent change in negative affective cue-induced functional connectivity in prespecified regions of interest (ROI)
ROI include the ventral striatal and amygdala with target clusters in temporal and occipital regions relative to placebo.
Time frame: Baseline, Day 2
Percent change in the frequency of failed response inhibition
A Go/NoGo task will be used as an objective measure of response inhibition. This task includes alcohol, non-alcohol, and neutral stimuli. The Go/No-go task requires participants to respond by pressing a button when they see a "go" signal, and not respond when they see the "no-go" signal. The key behaviour measured with this experiment is the participants' ability to withhold a response on No-go trials and the frequency of their failed responses.
Time frame: Baseline, Week 4
Change in discounting rate (log(k))
The discounting rate is derived from the Delay Discounting Task. Delay discounting tasks provide a measure of the temporal window and examine the devaluation of awards as a function of the delay to the receipt. The task includes 80 items requiring a choice between a delayed reward of $100 and smaller immediate rewards (ranging from $10 to $99, at delays ranging from one to 365 days. Discounting rates will be measured and pre-post differences will be assessed. Higher k values indicate higher impulsive decision-making.
Time frame: Baseline, Week 4
Change in number of set-shifting errors
Set-shifting errors are measured by the The Penn Conditional Exclusion Test (PCET). The PCET will be used as an objective measure of cognitive flexibility. A decrease in set-shifting errors equates to increased cognitive flexibility, while an increase in set-shifting errors equates to decreased cognitive flexibility.
Time frame: Screening, Week 4
Average number of no heavy drinking days
Outcome will be measured using the Timeline Followback (TLFB) interview-based assessment. The TLFB derives subjects' retrospective daily estimates of alcohol consumption patterns. Using a calendar as a visual aid, special events, and other memory cues, subjects are guided through the process of recalling and reporting daily drinking estimates.
Time frame: Week 24
Change in phosphatidyl ethanol (PEth) blood levels
Time frame: Baseline, Week 12
Change in carbohydrate-deficient transferrin (CDT) blood levels
Time frame: Baseline, Week 12
Change in the Drinker Inventory of Consequences questionnaire (DrInC-2R) total score
DrInC-2R is a validated self-report questionnaire consisted of 50 questions to measure adverse consequences of alcohol abuse in five areas: Interpersonal, Physical, Social, Impulsive, and Intrapersonal as well as frequency of these consequences (answers given on frequency scale grade from 0-3: 0 - never, 1 - once or a few times, 2 - once or twice a week 3 - daily or almost daily). Higher scores indicate greater levels of alcohol-related problems.
Time frame: Baseline, Week 24
Change in PSQI global score
Sleep quality is measured by the Pittsburgh Sleep Quality Index (PSQI) . The PSQI is a 19-item, self-rated questionnaire designed to measure sleep quality and disturbance over the past month in clinical populations. The 19 items are grouped into 7 components, including (1) sleep duration, (2) sleep disturbance, (3) sleep latency, (4) daytime dysfunction due to sleepiness, (5) sleep efficiency, (6) overall sleep quality, and (7) sleep medication use. Each of the sleep components yields a score ranging from 0 to 3, with 3 indicating the greatest dysfunction. Adding up the average scores of the seven factors gives a global PSQI score from 0 to 21, with 0-4 indicating "good" sleep and 5-21 indicating "poor" sleep.
Time frame: Baseline, Week 24
Change in patient's self-assessed quality of life (by the SF-36 Questionnaire)
The Short Form Health Survey (SF-36) is a validated 36 item self-report Quality of Life Questionnaire that measures eight multi-item dimensions of health: physical functioning, social functioning, role limitations due to physical problems, role limitations due to emotional problems, mental health, energy/vitality, pain, and general health perception. Scores range from 0 - 100. Lower scores = more disability, higher scores = less disability
Time frame: Baseline, Week 24
Change in Alcohol craving score
The alcohol cravings score will be assessed using the Penn Alcohol Craving Scale (PACS). The PACS consists of 5 questions with sub-scales ranging from 0 (never) to 6 (nearly all of the time). Scores greater than 20 were considered to meet diagnostic criteria for craving for a diagnosis of Substance Use Disorder.
Time frame: Baseline, Week 24
Change in negative affect score
Negative affect will be assessed using the negative affect scale of the Positive and Negative Affect Schedule (PANAS) which is a 10-item measure of negative emotions on a scale of 1 ("very slightly or not at all) to 5 ("extremely"). Total scores can range from 10 - 50, with higher scores representing higher levels of NA and reflect a dimension of general distress summarising a variety of negative states such as anger, guilt, or anxiety.
Time frame: Baseline, Week 24
Change in impulsivity score (Barratt impulsivity scale by the subscales and by the total score)
Impulsivity will be assessed using the Barratt impulsivity scale (BIS-11), a validated self-report questionnaire composed of 30 items describing common impulsive or non-impulsive (for reverse scored items) behaviors and preferences. Items are scored on a 4-point scale: Rarely/Never = 1, Occasionally = 2, Often = 3, Almost Always/Always = 4. Total score is assessed. The total scores can range from 30 to 120. The higher total score corresponds to the more impulsive behavior
Time frame: Baseline, Week 24
Average number of no drinking days
Outcome will be measured using the Timeline Followback (TLFB) interview-based assessment. The TLFB derives subjects' retrospective daily estimates of alcohol consumption patterns. Using a calendar as a visual aid, special events, and other memory cues, subjects are guided through the process of recalling and reporting daily drinking estimates.
Time frame: Week 24
Percentage of heavy drinking days
Outcome will be measured using the Timeline Followback (TLFB) interview-based assessment. The TLFB derives subjects' retrospective daily estimates of alcohol consumption patterns. Using a calendar as a visual aid, special events, and other memory cues, subjects are guided through the process of recalling and reporting daily drinking estimates.
Time frame: Week 24
Average number of drinks per day
Outcome will be measured using the Timeline Followback (TLFB) interview-based assessment. The TLFB derives subjects' retrospective daily estimates of alcohol consumption patterns. Using a calendar as a visual aid, special events, and other memory cues, subjects are guided through the process of recalling and reporting daily drinking estimates.
Time frame: Week 24
Percentage of abstinent days
Outcome will be measured using the Timeline Followback (TLFB) interview-based assessment. The TLFB derives subjects' retrospective daily estimates of alcohol consumption patterns. Using a calendar as a visual aid, special events, and other memory cues, subjects are guided through the process of recalling and reporting daily drinking estimates.
Time frame: Week 24
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