D-Cycloserine Facilitation of Cocaine - Cue Extinction
试验速览
- 阶段
- 2 期
- 状态
- 已完成
- 入组人数
- 79
- 试验地点
- 2
- 主要终点
- Subjective Craving of Cocaine
研究概览
简要总结
The purpose of this study is to explore the use of d-cycloserine (DCS) to facilitate extinction of response to cocaine cues in cocaine-dependent individuals, in hopes that it may lead to the development of new treatment options for cocaine dependence.
详细描述
Cocaine dependence remains a serious problem in the United States today and in spite of two decades of intense research, efficacious pharmacotherapeutic treatments have not been identified. Cocaine-associated environmental cues can elicit drug craving and exposure to cocaine-related cues is likely to be involved in relapse. Emerging data supports the role of glutamate in extinction learning. D-cycloserine (DCS), a partial glutamate agonist, facilitates extinction of associative learning in animal models of fear-conditioning and clinical studies of exposure treatment for anxiety disorders. A recent study demonstrated DCS acceleration of extinction of cocaine-induced conditioned place preference in rats (Botreau et al., 2006). Exploration of DCS in facilitating extinction of response to drug-related cues in humans is needed. The proposed study will extend these innovative and promising findings from the basic science arena and anxiety disorders field in a proof of concept investigation of DCS facilitation of extinction of response to cocaine-related cues in a human laboratory paradigm. In addition, to examine the neural substrates of extinction learning, a sub-set of individuals that are willing and eligible will undergo fMRI scanning procedures before and after the extinction protocol.
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
- Triple (Participant, Care Provider, Investigator)
入排标准
- 年龄范围
- 18 Years 至 65 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
DCS/DCS/DCS/Placebo
Participants were assigned to receive 50 mg of d-cycloserine (DCS) for each of 3 cue exposure sessions and a placebo at the one-week follow-up session. During cue exposure sessions, participants were asked to handle cocaine cues such as simulated crack, powder, and pipes while listening to an imagery script, and then they watched video footage of cocaine-related activities.
干预措施: D-Cycloserine (DCS) (Drug)
Placebo/Placebo/Placebo/Placebo
Participants were assigned to receive placebo for each of 3 cue exposure sessions and at the one-week follow-up session. During cue exposure sessions, participants were asked to handle cocaine cues such as simulated crack, powder, and pipes while listening to an imagery script, and then they watched video footage of cocaine-related activities.
干预措施: Placebo (Drug)
DCS/Placebo/DCS/Placebo
Participants were assigned to receive 50 mg of d-cycloserine (DCS) at the first and third cue exposure sessions and a placebo at the second cue exposure and the one-week follow-up session. During cue exposure sessions, participants were asked to handle cocaine cues such as simulated crack, powder, and pipes while listening to an imagery script, and then they watched video footage of cocaine-related activities.
干预措施: D-Cycloserine (DCS) (Drug)
DCS/DCS/Placebo
Participants were assigned to receive 50 mg of d-cycloserine (DCS) for each of 2 cue exposure sessions and a placebo at the one-week follow-up session. During cue exposure sessions, participants were asked to handle cocaine cues such as simulated crack, powder, and pipes while listening to an imagery script, and then they watched video footage of cocaine-related activities. Cue exposure sessions were accompanied by instructions on coping with craving.
干预措施: D-Cycloserine (DCS) (Drug)
Placebo/Placebo/Placebo
Participants were assigned to placebo for each of 2 cue exposure sessions and a placebo at the one-week follow-up session. During cue exposure sessions, participants were asked to handle cocaine cues such as simulated crack, powder, and pipes while listening to an imagery script, and then they watched video footage of cocaine-related activities. Cue exposure sessions were accompanied by instructions on coping with craving.
干预措施: Placebo (Drug)
结局指标
主要结局
Subjective Craving of Cocaine
时间窗: two weeks
Average of participants' subjective measures of craving immediately following cue exposure at the one-week follow-up session. Participants rated craving on a 10 point analog scale ranging from 0 (not at all) to 10 (extremely).
次要结局
未报告次要终点
研究者
Kathleen Brady, MD, PhD
Professor
Medical University of South Carolina