Transcranial Direct Current Stimulation to Modulate Top-Down Regulation for Drug Craving in Methamphetamine Use Disorder (MUD)
试验速览
- 阶段
- 1 期
- 状态
- 已完成
- 入组人数
- 60
- 试验地点
- 2
- 主要终点
- Change in Drug Cue Reactivity BOLD Signal in fMRI from before to after Intervention
研究概览
简要总结
Methamphetamine use disorder (MUD) is among the costliest and deadliest substance use disorders (SUDs) world-wide and is frequently comorbid with other mental health conditions. There is no empirically validated medical treatment for MUD. Drug craving is the signature aspect of MUD and other substance use disorders and has been associated with continued drug use and relapse. The investigators and others have shown that transcranial direct current stimulation (tDCS) over dorsolateral prefrontal cortex (DLPFC) can modulate drug craving in different SUDs. tDCS is a method of non-invasive brain stimulation and is a low-cost scalable technology without any serious side effects that delivers low levels of direct current (0.1-2 mAmp) transcranially. However, there are significant inter-individual differences in response to tDCS, which is not well understood but can have profound impact on efficacy. Meanwhile, there are no studies with neuroimaging to show how tDCS affects drug craving. Investigators propose the first combined tDCS/functional Magnetic Resonance Imaging (fMRI) study to examine the acute effects of tDCS on neural substrates underlying drug induced craving.
详细描述
Methamphetamine use disorder (MUD) is among the costliest and deadliest substance use disorders (SUDs) world-wide and is frequently comorbid with other mental health conditions. There is no empirically validated medical treatment for MUD. Drug craving is the signature aspect of MUD and other substance use disorders and has been associated with continued drug use and relapse. The investigators and others have shown that transcranial direct current stimulation (tDCS) over dorsolateral prefrontal cortex (DLPFC) can modulate drug craving in different SUDs. tDCS is a method of non-invasive brain stimulation and is a low-cost scalable technology without any serious side effects that delivers low levels of direct current (0.1-2 mAmp) transcranially. However, there are significant inter-individual differences in response to tDCS, which is not well understood but can have profound impact on efficacy. Meanwhile, there are no studies with neuroimaging to show how tDCS affects drug craving. The investigators propose the first combined tDCS/functional Magnetic Resonance Imaging (fMRI) study to examine the acute effects of tDCS on neural substrates underlying drug induced craving. The investigators hypothesize that tDCS amplifies DLPFC's top-down modulatory role via its connectivity to other cortical-subcortical areas. In this double blind randomized experimental design, the investigators will recruit 60 people with MUD during their early abstinence phases into parallel arms with active and sham DLPFC tDCS. Each subject will undergo resting state and task based (drug cue exposure paradigm) functional MRI pre and post tDCS. The investigators will conduct individual difference analyses to explore the potential predictors for tDCS response, including pre-tDCS top-down connectivity measures of DLPFC and other subjective, clinical, behavioral, structural, and functional variables. The results of this study will provide neuroscience-based evidence for the efficacy of tDCS and will advance the field towards precision addiction medicine.
研究设计
- 研究类型
- Interventional
- 分配方式
- Randomized
- 干预模型
- Parallel
- 主要目的
- Basic Science
- 盲法
- Quadruple (Participant, Care Provider, Investigator, Outcomes Assessor)
入排标准
- 年龄范围
- 18 Years 至 60 Years（Adult）
- 性别
- Male
- 接受健康志愿者
- 否
入选标准
- •English speaking.
- •Diagnosed with Methamphetamine Use Disorder (last 12 months) based on the Mini International Neuropsychiatric Interview (MINI) interview (Diagnostic and Statistical Manual of Mental Disorders-DSM-5)
- •Being abstinent from methamphetamine in an addiction treatment program for at least one week based on medical records or self-report
- •Positive response to Methamphetamine cue-reactivity screening (MCS)
- •Willing and capable of interacting with the informed consent process
排除标准
- •Unwillingness or inability to complete any of the major aspects of the study protocol, including magnetic resonance imaging (i.e., due to claustrophobia), drug cue rating, or behavioral assessment.
- •Abstinence from methamphetamine for more than 6 months based on self-report
- •Schizophrenia or bipolar disorder based on the MINI interview
- •Active suicidal ideation with intent or plan determined by self-report or assessment by PI or study staff during the initial screening or any other phase of the study
- •Positive drug test for amphetamines, opioids, cannabis, alcohol,Phencyclidine (PCP), or cocaine confirmed by breath analyzer and urine tests
- •Any active skin disorder that affects skin integrity of the scalp
- •Having any condition that would preclude undergoing an fMRI scan or tDCS stimulation based on the fMRI safety and tDCS safety checklists
- •Unstable medical disorder reported in subject's medical history or by a clinician assessment
- •History of seizure
- •Non-correctable vision or hearing problems.
- •Any other condition the PI or study staff feel would put the subject at risk for entering the study
结局指标
主要结局
Change in Drug Cue Reactivity BOLD Signal in fMRI from before to after Intervention
时间窗: Immediate before and immediate after intervention
Drug Cue Reactivity BOLD Signal is measured as average blood oxygen level dependent (BOLD) signal difference with voxel-wise analysis in the regions of interests (ROIs) (prefrontal cortex parcels, insula segments, striatum nuclei, thalamus nuclei and extended amygdala nuclei) in craving \> neutral contrast in drug cue exposure fMRI task with blocks of neutral and drug related images
Change in Drug Cue Reactivity Self-Report from before to after Intervention
时间窗: Immediate before and immediate after intervention
Drug cue reactivity self-report is measured as the difference in subjective response to "On a scale of 0-100, How much drug craving are you experiencing RIGHT NOW" measured on a visual analog scale (0-100) before and after drug cue exposure fMRI task
次要结局
- Change in Momentary Craving Self-Report from before to after Intervention(Immediate before and immediate after intervention)
- Change in Cortical-Subcortical Connectivity in Resting State fMRI from before to after Intervention(Immediate before and immediate after intervention)
- Change in Cortical-Subcortical Task-based Connectivity in Cue Exposure fMRI from before to after Intervention(Immediate before and immediate after intervention)
- Change in RAI in Resting State fMRI from before to after Intervention(Immediate before and immediate after intervention)
- Change in Area Under Electrode Connectivity in Resting State fMRI from before to after Intervention(Immediate before and immediate after intervention)
- Change in Area Under Electrode Task-based Connectivity in Cue Exposure fMRI from before to after Intervention(Immediate before and immediate after intervention)