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The Effect of iTBS on the Inhibition Control Function of BN

2022年1月10日 更新者：Sufang PENG、Shanghai Mental Health Center

The Effect of Theta Burst Stimulation on the Inhibition Control Function of Bulimia Nervosa and Relevant Mechanism Study

Pathological out-of-control behavior is the core clinical symptom of Bulimia nervosa (BN). The study of its neural circuits and biological mechanism is very important to explore new intervention targets. Previous studies have found that the patients with BN have inhibitory control impairment, which may be the basis of uncontrolled binge eating and purging behaviors of BN. The study found that the cognitive decision-making dysfunction of substance addicts may lead to behavior solidification. At present, there is no related research on the cognitive decision-making model of BN. Previous studies of applicants have found that there is an enhancement in goal-oriented decision-making in BN, which may explain the binge eating and purging behaviors aimed at weight control. In addition, BN patients have obvious impulsiveness, and the individuals of BN often feel unable to control eating behavior , and experience obvious sense of out of control. The previous study confirmed that untreated BN patients were highly impulsive and had inhibitory control disorders. Inhibition and control disorder is one of the important pathogenesis of BN. Previous studies indicated that dorsolateral prefrontal cortex (DLPFC) and dorsomedial prefrontal cortex (DMPFC) were associated with aboved symptoms. In this study, the patients with BN were selected as subjects. A randomized, single-blind cohort study was designed to observe the effect of iTBS intervention of DLPFC or DMPFC on pathological out-of-control behavior. Combined with behavioral, neuroimaging and genetic techniques, the investigators focused on the function of the prefrontal lobe-striatum neural circuits dopamine system. By the objective markers of peripheral, brain imaging and behavior of BN, to provide new targets and ideas for the treatment of BN.

研究概览

地位

招聘中

条件

干预/治疗

详细说明

Bulimia nervosa(BN) is a chronic and refractory mental disorder characteristic of recurrent binge eating and weight control which mostly occur in adolescents and young women. The life-time prevalence ranges from 1.0%-4.2%, and keep increasing. Pathological out-of-control behavior is the core clinical symptom of BN. Impulsive personality trait is an important risk factor for overeating symptoms in patients with BN. Inhibition control dysfunction leads to increased impulsiveness, while impaired goal-oriented control leads to rigid behavior habits, such as obsessive-compulsive drug-seeking and drug use, resulting in pathological out-of-control behavior.

Repetitive transcranial magnetic stimulation (rTMS) is a non-invasive, safe and non-invasive physical intervention and nerve stimulation, which can be targeted at specific brain regions or networks, providing hope for people who do not respond well to drug therapy. iTBS stimulation mode can induce long-term potentiation of behavior and neural activity (LTP). Previous studies indicated that dorsolateral prefrontal cortex (DLPFC) and dorsomedial prefrontal cortex (DMPFC) were associated with out-of-control behavior.

In this study, the investigators will recruit 90 BN patients, would randomly divided into 30 DMPFC iTBS intervention group, 30 DLPFC iTBS and 30 sham-stimulation group. 20 iTBS will be given in the intervention group at DMPFC or DLPFC. To assess the eating disorder symptoms, impulsive and emotional change, clinical symptom scales, psychological scales and the behavioral experiments will be used at baseline, 4 weeks, 8 weeks, 12 weeks and16weeks, respectively. Furthermore, brain MRI will be used for BN at baseline.

This study is innovative and feasible. If the expected results can be obtained, it will lay a foundation for understanding the common mechanism behind the pathological behavior of BN and provide new directions and ideas for the design of effective intervention measures.

研究类型

介入性

注册 (预期的)

90

阶段

  • 不适用

联系人和位置

本节提供了进行研究的人员的详细联系信息，以及有关进行该研究的地点的信息。

学习联系方式

研究联系人备份

学习地点

  • 中国
    • Shanghai
      • Shanghai、Shanghai、中国、200030
        • 招聘中
        • Shanghai Mental Health Center
        • 接触：
        • 接触：

参与标准

研究人员寻找符合特定描述的人，称为资格标准。这些标准的一些例子是一个人的一般健康状况或先前的治疗。

资格标准

适合学习的年龄

18年 至 35年 (成人)

接受健康志愿者

是的

有资格学习的性别

女性

描述

Inclusion Criteria:

  • female,
  • Han nationality;
  • right-handed;
  • meet the diagnostic criteria of DSM-5 bulimia nervosa, body mass index (BMI) ≥ 18.5kg / m2;
  • education level of junior high school or above, sufficient audiovisual level to complete the necessary examination of the study.
  • Before entering the group, he has received fluoxetine treatment, the dose has been stable for one month, and has not received any form of physiotherapy (such as electroconvulsive therapy) within one month;
  • each patient must understand the nature of this study and sign an informed consent form.

Exclusion Criteria:

  • Patients who meet the diagnosis of DSM-5 other than BN, such as substance abuse / dependence, bipolar disorder, high risk of suicide, strong destructive impulses or antisocial behaviors;
  • complicated with severe organic diseases and cognitive impairment, make it impossible for patients to complete the required symptom assessment and psychological tests;
  • have a history of brain trauma or brain disease, epilepsy, etc. Those who have been exposed to ECT or MECT within 1 month;
  • those with intracranial metal materials or pacemakers, implanted metal objects in vivo;
  • those who are pregnant or planned pregnancy, women of childbearing age who are positive in pregnancy test.

学习计划

本节提供研究计划的详细信息，包括研究的设计方式和研究的衡量标准。

研究是如何设计的？

设计细节

  • 主要用途：治疗
  • 分配：随机化
  • 介入模型：并行分配
  • 屏蔽：双倍的

武器和干预

参与者组/臂
干预/治疗
有源比较器：DMPFC iTBS
DMPFC iTBS group has 30 patients. Each receive 20 times DMPFC iTBS therapy. During the iTBS, a 5-min train treatment(110%RMT, 2s on and 8s off, 900 pulses in total）was applied to the left DMPFC.
其他：DMPFC iTBS
The intermittent theta-burst stimulation (iTBS) (i.e. two excitatory intervention paradigm) to target DMFPC can improve out-of-control behavior and decision-making model.
有源比较器：DLPFC iTBS
DLPFC iTBS group has 30 patients. Each receive 20 times DMPFC iTBS therapy. During the iTBS, a 5-min train treatment(110%RMT, 2s on and 8s off, 900 pulses in total）was applied to the left DMPFC.
其他：DLPFC iTBS
The intermittent theta-burst stimulation (iTBS) to target DLFPC (i.e. region within the executive control network) can effectively reduce craving, which is probably associated with enhancement of executive function.
假比较器：placebo
The placebo research received similar pseudo-stimulation treatment, which was the same as the treatment site and method of true stimulation, but during stimulation, the coil used B65 8 zigzag coil, which was flipped 180 degrees, and only produced stimulation sound during treatment, but did not produce irritating magnetic field. It can produce a placebo effect.
其他：DMPFC iTBS
The intermittent theta-burst stimulation (iTBS) (i.e. two excitatory intervention paradigm) to target DMFPC can improve out-of-control behavior and decision-making model.
其他：DLPFC iTBS
The intermittent theta-burst stimulation (iTBS) to target DLFPC (i.e. region within the executive control network) can effectively reduce craving, which is probably associated with enhancement of executive function.

研究衡量的是什么？

主要结果指标

结果测量
措施说明
大体时间
Eating Disorder Examination(EDE-Q)
大体时间：Change from Baseline eating attitudes and behaviors at 4 weeks,8weeks,12weeks,16weeks.
EDE-Q can evaluate the eating disorder behavior and psychology characteristics and assess their frequency and intensity, which can assess the severity of eating disorders. The scores of the subscales are obtained by calculating the average of the items that comprise each subscale, and the global score (EDE-Q 6.0) is the average of scores of the four subscales. The higher is the score, the more severe in the ED-symptoms.
Change from Baseline eating attitudes and behaviors at 4 weeks,8weeks,12weeks,16weeks.

次要结果测量

结果测量
措施说明
大体时间
Barratt Impulsiveness Scale(BIS-II)
大体时间：Change from Baseline the severity of impulse suppression orientation at 4 weeks,8weeks,12weeks,16weeks.
This tool can measure the severity of impulse suppression orientation.The total score for BIS-11 ranges from 30 to 120. The higher is the score, the higher is the impulsiveness.
Change from Baseline the severity of impulse suppression orientation at 4 weeks,8weeks,12weeks,16weeks.
Beck Depression Inventory-II (BDI- II)
大体时间：Change from Baseline the severity of the symptoms of depression at 4 weeks,8weeks,12weeks,16weeks.
Depression symptoms were assessed with the BDI-II. The scale has 21-items. The total score for BDI- IIranges from 0 to 84.The higher is the score, the higher is the depression.
Change from Baseline the severity of the symptoms of depression at 4 weeks,8weeks,12weeks,16weeks.
Beck Anxiety Inventory (BAI)
大体时间：Change from Baseline Baseline the severity of the symptoms of anxiety at 4 weeks,8weeks,12weeks,16weeks.
BAI is a 21-item self-report scale for assessing the symptom of anxiety. The total score for BAI ranges from 0 to 84. The higher is the score, the higher is the anxiety.
Change from Baseline Baseline the severity of the symptoms of anxiety at 4 weeks,8weeks,12weeks,16weeks.
Behavioral experiment(Sequential learning task )
大体时间：Change from Baseline behaviors at 4 weeks.
The spaceship task from Decker et al will be used. The task was designed to dissociate model-free and model-based learning strategies. The goal of the participants will to collect "space gems". In the first stage, the participants choose between two spaceships. The probability of each spaceship's transition to two planets is fixed. In the second stage, on each planet, participants need to choose between two aliens to obtain gems. The probability of getting a gem changes slowly at this stage. This changing reward probability encourages participants to explore different options throughout the task to maximize the reward. The behavior data will be modeled, and the hybrid reinforcement learning model will used to obtain the ratio of model-based behavior and model-free behavior in the process of individual learning decision-making.
Change from Baseline behaviors at 4 weeks.
Incidence of Adverse Events [Safety and Tolerability] (i.e., seizures, etc.)
大体时间：through study completion, an average within 1 week
The frequency of adverse events from each participant.
through study completion, an average within 1 week
Behavioral experiment(Stop-signal task )
大体时间：Change from Baseline behaviors at 4 weeks.
The stop-signal task was adjusted using as cues the two foods previously selected after the rating session. Two types of conditions were included, such as low-error condition and high-error condition. Participants performed 240 trials in total: 160 Go trials (80 for the Low-Error condition and 80 for the High-Error condition) and 80 Stop trials (40 for the Low-Error condition and 40 for the High-Error condition). The task lasted approximately 16 minutes. Data analysis will be performed on the accuracy (number of errors) and the RTs of correct responses vs. errors (no-response trials ignored), for the Low- vs. High-Error condition, and for Go vs. Stop trials.
Change from Baseline behaviors at 4 weeks.
Behavioral experiment(Delay discounting task )
大体时间：Change from Baseline behaviors at 4 weeks.
The delay discounting task for monetary present choices between differing amounts of reward at varing time points (such as 2 days, 7days, 15days, 1 month, 45 days, 3 months, 6 months and 1 year), where one of the options is a smaller amount of reward available soon or immediately, and the other option is a larger amount of reward available after a longer delay. Discount rate will be estimated by fitting the indifference point data to a discounting model.
Change from Baseline behaviors at 4 weeks.
MRI
大体时间：before the intervention
brain activation and structure as assessed by MRI
before the intervention

合作者和调查者

在这里您可以找到参与这项研究的人员和组织。

赞助

Shanghai Mental Health Center

调查人员

  • 首席研究员：SuFang Peng, PhD、Shanghai Mental Health Center

研究记录日期

这些日期跟踪向 ClinicalTrials.gov 提交研究记录和摘要结果的进度。研究记录和报告的结果由国家医学图书馆 (NLM) 审查，以确保它们在发布到公共网站之前符合特定的质量控制标准。

研究主要日期

学习开始 (实际的)

2020年7月1日

初级完成 (预期的)

2023年6月30日

研究完成 (预期的)

2023年6月30日

研究注册日期

首次提交

2021年8月6日

首先提交符合 QC 标准的

2022年1月10日

首次发布 (实际的)

2022年1月11日

研究记录更新

最后更新发布 (实际的)

2022年1月11日

上次提交的符合 QC 标准的更新

2022年1月10日

最后验证

2022年1月1日

更多信息

与本研究相关的术语

其他相关的 MeSH 术语

其他研究编号

  • 20210712-SFPeng-YChen

药物和器械信息、研究文件

研究美国 FDA 监管的药品

不

研究美国 FDA 监管的设备产品

不

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