Characterization of CB1 Receptors Using [11-C]OMAR in Opioid Use Disorder
试验速览
- 阶段
- 1 期
- 状态
- 尚未招募
- 发起方
- 入组人数
- 110
- 试验地点
- 1
- 主要终点
- CB1R Availability
研究概览
简要总结
The goals of this sub-study is to assess CB1R availability in early abstinent individuals with OUD (following opioid agonist therapy - OAT stabilization) and in matched healthy controls.
详细描述
Investigators will use PET imaging to investigate CB1R availability in treatment-seeking individuals with OUD during the early phase of OAT, compared to healthy controls (HCs). Using PET imaging with the CB1R-specific radioligand [¹¹C]OMAR, investigators will assess CB1R availability in predefined brain regions. Investigators will characterize group differences in CB1R availability, evaluate the relationship between CB1R alterations and negative emotional states, including mood, anxiety, and perceived stress, as well as risk of opioid relapse (defined as time to first use of non-prescribed opioids) over a 90-day follow-up period.
研究设计
- 研究类型
- Interventional
- 分配方式
- Non Randomized
- 干预模型
- Parallel
- 主要目的
- Diagnostic
- 盲法
- None
入排标准
- 年龄范围
- 25 Years 至 65 Years（Adult, Older Adult）
- 性别
- All
- 接受健康志愿者
- 是
入选标准
- •Normal screening bloodwork.
- •Adequate arterial access for placement of an arterial line and blood sampling per study protocol.
- •OUD Participants:
- •Diagnosis of opioid use disorder (OUD) according to DSM-5 criteria.
- •Actively seeking treatment for OUD.
- •Willingness to initiate opioid agonist therapy (OAT) with buprenorphine.
- •Healthy Controls:
- •Good general physical health.
- •No current or past diagnosis of any psychiatric or substance use disorders.
排除标准
- •Any current major medical condition that, in the opinion of the Principal Investigator, poses a risk for PET procedures.
- •Prior participation in research studies within the past year that would result in cumulative radiation exposure exceeding annual limits.
- •Presence of ferromagnetic metal in the body, pacemaker, or other contraindications to MRI.
- •Positive pregnancy test or current lactation.
- •History of neurological conditions, including stroke or seizure disorders.
- •Hematocrit values lower than 30
- •OUD Participants
- •Current or past diagnosis of a serious psychiatric disorder.
- •Current diagnosis of any substance use disorder other than nicotine or opioids.
- •Use of any substances within the past 30 days.
- •Current use of SSRIs or benzodiazepines or use within the past 30 days.
- •Previous enrollment in the main study.
- •Healthy Controls:
- •Current or past diagnosis of any psychiatric disorder.
- •Current diagnosis of any substance use disorder (excluding nicotine).
- •Use of any substances within the past 30 days.
研究组 & 干预措施
Opioid Use Disorder in Opioid Agonist Therapy (OAT)
Patients diagnosed with opioid use disorder during the early phase of opioid agonist therapy
干预措施: [11C]OMAR (Drug)
Healthy Volunteers
Healthy volunteers with no current or past major medical or psychiatric history
干预措施: [11C]OMAR (Drug)
结局指标
主要结局
CB1R Availability
时间窗: Day 7
To compare cortical CB1R availability (volume of distribution, mL/cm3) assessed using brain PET imaging in individuals diagnosed with opioid use disorder on chronic methadone maintenance vs. matched healthy controls.
Mean Beck Depression Inventory (BDI) score
时间窗: Days 7, 28, 49, 70, 90
A 21-question self-report tool to assess depression symptoms. Total score range 0 to 63, higher scores indicating more severe symptoms.
Mean Anxiety Inventory (BAI) score
时间窗: Days 7, 28, 49, 70, 90
A 21-question self-report tool to assess anxiety symptoms. Total score range 0 to 63, higher scores indicating more severe anxiety.
Mean Perceived Stress Scale (PSS) score
时间窗: Days 7, 28, 49, 70, 90
The PSS is a 10-item self- report scale. PSS scores are obtained by reversing responses to the four positively stated items (items 4, 5, 7, \& 8) and then summing across all scale items. Total score range from 0-40 with higher scores indicate greater levels of stress.
Mean Opioid Relapse days
时间窗: Days 7, 14, 21, 28, 35, 42, 49, 56, 70, 77, 84, 90
Mean Opioid Relapse days assessed using Timeline Follow Back (TLFB)
次要结局
未报告次要终点
研究者
Anahita Bassir Nia
Assistant Professor of Psychiatry
Yale University