Endocannabinoid System Engagement to Reduce Anxiety Reactivity with Cannabidiol in Social Anxiety Disorder (R61 Project)
试验速览
- 阶段
- 2 期
- 状态
- 已完成
- 入组人数
- 63
- 试验地点
- 1
- 主要终点
- Anandamide
研究概览
简要总结
This study seeks to understand how cannabidiol (CBD) - a non-intoxicating chemical compound obtained from the Cannabis sativa plant - affects biological and stress-related responses that are believed to underlie anxiety disorders. This study will evaluate the effects of different doses of CBD on blood plasma levels of anandamide (a molecule in the brain that has been shown to help regulate stress responses; primary biological signature) and anxiety reactivity to a standardized stress task (secondary target) in an acute (4-day) dosing study (i.e., when steady state CBD levels have been reached). Approximately 60 subjects with social anxiety disorder (SAD), ages 18-70, will participate in this study. They will be assigned by chance to receive one of two doses of CBD (150 mg BID or 450 mg BID administered in two divided doses daily) or placebo (which resembles the study drug but has no active ingredients) BID for 3 days and on the morning of day 4. Knowledge gained from this study will help determine the therapeutic potential of CBD for anxiety.
详细描述
Background and aims:
The proposed two-phase, milestone driven project seeks to understand how cannabidiol (CBD) effects biological and stress-related responses that are believed to underlie anxiety disorders. This knowledge will help advance the therapeutic potential of CBD for anxiety. The R61 phase project will evaluate the dose-dependent effects of CBD on blood plasma levels of anandamide (a molecule in the brain that has been shown to help regulate stress responses; primary biological signature) and anxiety reactivity to a standardized stress task (secondary target) in an acute (4-day) dosing study (i.e., when steady state CBD levels have been reached). Aim 1 will test the hypothesis that CBD increases anandamide levels and decreases anxiety reactivity compared to placebo. Aim 2 will determine which dose (150 mg BID or 450 mg BID) of CBD produces a greater effect on anandamide and anxiety reactivity. To achieve these aims, 60 participants meeting diagnostic criteria for social anxiety disorder (SAD) will be randomized 1:1:1 to one of two doses of CBD (300 mg/day or 900 mg/day) or placebo. They will complete standardized paradigms assessing anxiety reactivity and blood draws for determination of CBD and anandamide levels at baseline and day 4.
Research design and procedures:
This phase II clinical trial will randomize 60 subjects using a double-blind, parallel group design, 1:1:1 to CBD (300 mg/day or 900 mg/day) or placebo. Randomization will be stratified by sex assigned at birth. Study personnel and subjects will be blinded throughout. Only the study biostatistician and pharmacist will be unblinded.
Session 1 (intake session) will involve explanation of study procedures, informed written consent, a clinical evaluation, a series of questionnaires, medical exam and history including current treatments, and urine and blood test. This session will determine eligibility to take part in the study.
研究设计
- 研究类型
- Interventional
- 分配方式
- Randomized
- 干预模型
- Parallel
- 主要目的
- Treatment
- 盲法
- Quadruple (Participant, Care Provider, Investigator, Outcomes Assessor)
盲法说明
Identical taste, smell, color and viscosity of liquid provided in identical bottles. Each participant will receive two bottles, with instructions of how many ml to take BID from each of Bottle #1 and Bottle #2. The research pharmacy will label the bottles for each randomized participant so they take the dose to which they were randomized.
入排标准
- 年龄范围
- 18 Years 至 70 Years（Adult, Older Adult）
- 性别
- All
- 接受健康志愿者
- 否
入选标准
- 未提供
排除标准
- 未提供
研究组 & 干预措施
Cannabidiol 900 mg/d
Participants will receive CBD (900 mg/d). Evenly split doses of 450 mg will be taken at morning and evening meals for 3 days, and a 450 mg dose will be taken in the morning of day 4 (before the post-test).
干预措施: Cannabidiol (Drug)
Cannabidiol 300 mg/d
Participants will receive CBD (300 mg/d). Evenly split doses of 150 mg will be taken at morning and evening meals for 3 days, and a 150 mg dose will be taken in the morning of day 4 (before the post-test).
干预措施: Cannabidiol (Drug)
Placebo
Participants will receive a CBD matching placebo. Evenly split doses will be taken at morning and evening meals for 3 days, and a dose will be taken in the morning of day 4 (before the post-test).
干预措施: Placebo (Drug)
结局指标
主要结局
Anandamide
时间窗: Baseline, day 4
Change in blood plasma levels of anandamide collected pre-stress task. A standardized mean difference (SMD) increase of 0.5 or greater in favor of CBD (either 300 mg/d or 900 mg/d) vs. placebo is defined as the primary biological target.
Change in state anxiety (SUDs) during stress task performance phase
时间窗: Baseline, day 4
Self-reported current feelings of anxiety using a 0 to 100 subjective units of distress scale. Higher scores reflect greater levels of anxiety. A standardized mean difference (SMD) decrease of 0.3 or greater in favor of CBD (either 300 mg/d or 900 mg/d) vs. placebo during the performance phase of the stress task is defined as one of two primary biobehavioral targets.
Change in state anxiety (SUDs) during stress task anticipation phase
时间窗: Baseline, day 4
Self-reported current feelings of anxiety using a 0 to 100 subjective units of distress scale. Higher scores reflect greater levels of anxiety. A standardized mean difference (SMD) decrease of 0.3 or greater in favor of CBD (either 300 mg/d or 900 mg/d) vs. placebo during the anticipation phase of the stress task is defined as one of two primary biobehavioral targets.
次要结局
- Change in state anxiety (STAI) following the stress task(Baseline, day 4)
- Change in negative self-statements during the stress task(Baseline, day 4)
- Change in state anxiety (STAI) during stress task anticipation phase(Baseline, day 4)
研究者
Charles Taylor
Associate Professor
University of California, San Diego