Investigating Stress-related Mechanisms in the Laboratory and Real World in Individuals With Cannabis Use Disorder

Yale University39 enrolled

Overview

This research project proposes a novel approach to elucidate the biological adaptations associated with Cannabis Use Disorder and to assess whether such adaptations are predictive of higher drug craving in response to both drug cues and stressors in both the laboratory and real-world, and higher relapse risk and drug use in the real world.

The intent of this study is to recruit 25 treatment-seeking individuals with Cannabis Use Disorder (CUD) and 25 light users (\<1 joint/week) to complete three guided imagery conditions (stress, cannabis, neutral) in inpatient research units. During the guided imagery, repeated measurements of subjective (i.e., craving, negative affect), neuroendocrine (i.e., cortisol), and physiological variables (i.e., heart rate variability \[HRV\]) will be collected. Thereafter, individuals with CUD will begin one-month of drug counseling treatment coupled with surveys delivered via smartphones daily in the morning, evening, and at four random times during the day.

Study Type

OBSERVATIONAL

Enrollment

Conditions

Cannabis Use Disorder

Interventions

Guided Imagery Laboratory SessionOTHER

On days 1, 2 and 3 of the study, subjects will come to the research testing rooms and be provided with lunch before beginning the laboratory session. After a 40-minute adaptation period, two blood samples will be drawn before imagery (BASELINE). After the second blood draw, a 5-minute baseline period will follow to assess continuous pulse rate, BP, and HRV assessments. The subject and research staff conducting the sessions will be blinded to the order and content of the imagery condition. In each recording, the subjects will listen to the scripts over headphones and will vividly imagine the described situation, 'as if' it were happening right now," for 5 minutes. The research nurse will take a blood draw immediately after the imagery (IMAGERY). After that, three recovery blood draws will be performed at 15-minute intervals (RECOVERY). We will analyze the total of six blood samples for levels of cortisol.

Eligibility

Sex: ALLMin age: 18 YearsMax age: 50 Years

Medical Language ↔ Plain English

Inclusion Criteria: * Cannabis using men and women who: * 1\. Are fluent in English; * 2\. Are using cannabis at levels to match either of the two groups: a) Light Users: i. Cannabis using levels of \< 1 joint/week ii. Has never met DSM-5 criteria for CUD or other substance use disorders. b) Individuals with Cannabis Use Disorder: i. Meets criteria for CUD based on the SCID (≤ 2 symptoms in past year); ii. Has a past-year cannabis use pattern of ≤3 times per week; iii.Do not meet criteria for any other substance use disorders other than mild Alcohol Use Disorder. * 3\. Provide a negative breathalyzer for alcohol and only positive for cannabis use at all appointments; * 4\. Can provide written informed consent. Exclusion Criteria: * 1\. Meets current or past DSM-5 criteria for Axis I for major psychiatric disorders, other than depression or anxiety disorder; * 2\. Meets criteria for a current Substance Use Disorder other than Cannabis or mild Alcohol Use Disorder; * 3\. Has any significant current medical conditions requiring medication, including neurological, renal, thyroid, cardiovascular, liver, endocrine, or immune conditions; * 4\. Reports current use of medications/drugs that interfere with HPA axis response, * 5\. Are women who are pregnant or lactating, are peri-/post-menopausal, or those with hysterectomies; * 6\. Report current use of psychotropic drugs other than antidepressants.

Locations (1)

Yale Stress Center

New Haven, Connecticut, United States

Outcomes

Primary Outcomes

Rating of craving in the laboratory

Participants will rate their level of stress and marijuana craving at five time points during the laboratory session, once at pre-baseline, baseline, immediately post-imagery procedures, and at three times point 15, 30, and 45 minutes post-imagery. Craving and stress will be assessed using a 100-point visual analog scale (VAS) in which 0="Not at all" and 100="Extremely High." Individuals with CUD will be compared to light marijuana users in their differences in slope in response to the imagery.

Time frame: 3 days

Rating of subjective stress in the laboratory

Time frame: 3 days

Rating of subjective craving in the real world

Participants will report using ecological momentary assessment (EMA) their current levels of stress and craving, if they have used marijuana, and if they experienced a stressor. These reports will be generated in three different ways: at 8 am and 8 pm at night, at four random times during waking hours, and during marijuana use. Individuals with CUD will be compared to light marijuana users in their differences in real-world ratings of stress and craving. Craving and stress will be assessed using a 100-point visual analog scale (VAS) in which 0="Not at all" and 100="Extremely High."

Time frame: 28 days

Rating of subjective stress in the real world

Data from ClinicalTrials.gov

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Secondary Outcomes

Blood pressure- diastolic

A General Electric Dynamap will be used to place a blood pressure cuff on the subject's preferred arm to monitor blood pressure (BP) during the laboratory sessions in week 2 in order to assess change in BP responses to stress, drug cue and neutral provocation.

Time frame: 2 weeks

Blood pressure- systolic

Time frame: 2 weeks

Change in Cannabis use- Labs

Cannabis use will be determined using a urine toxicology screen. Change in percent THCCOOH levels assessed via urine during the 4 week trial assessed by a weekly urine toxicology screen.

Time frame: 4 weeks

Change in Cannabis use- Self Report

Change over time in daily reporting of cannabis use per day will be assessed by self-report on the Timeline Followback.

Time frame: 4 weeks