A Study of New Treatment for Excessive Alcohol Users by Electric Stimulation of Nerves Around Ear
Auricular Percutaneous Electrical Neural Field Stimulation in Short-Term Treatment of Alcohol Dependence- Neurohaemodynamic Correlates and Feasibility Study
Alcohol Use Disorders (AUD's) are a major health and social problem. Relapse is a rule rather than an exception in alcohol dependence, leading to poor outcomes. Craving are frequently associated with relapse. Keeping in mind the high burden of disease due to AUD, limited efficacy of available treatment modalities it is important to study new treatment modalities. Vagus nerve stimulation (VNS) is a promising neuromodulation technique with robust evidence in epilepsy and treatment-resistant depression. fMRI studies show that transcutaneous VNS (tVNS) replicates most of the biological effects of VNS with an additional advantage of being non-invasive. Percutaneous Electrical Neural Field Stimulation (PENFS) of auricular branch of vagus nerve is a variant of tVNS which has shown promise in the treatment of opioid withdrawal. The efficacy of PENFS has been evaluated in AUDs in only handful of studies.
I propose to employ a double-blind randomized sham-controlled trial where 40 subjects with AUD will be randomized to 2 groups, with 1 group receiving 'Active' auricular PENFS, and another group receiving bilateral 'sham' auricular PENFS.
Assessments will be carried out at baseline and after 15 days of advent of PENFS on tasks to assess craving, along with neurohemodynamic changes on functional Magnetic Resonance Image (fMRI). Follow up of patients will be done till the first relapse or till 3 months after the post evaluation, whichever is earlier.
The investigator's hypotheses are:
- Active PENFS will lead to significantly greater improvement in subjective craving and drinking-related outcomes as compared to sham PENFS in patients with AUD over the follow-up period of 3 months.
- Active PENFS will produce a significantly differential Blood Oxygen Level Dependent (BOLD) activation-deactivation pattern of brain regions (greater activation of dorsolateral prefrontal cortex and anterior cingulate cortex and along with deactivation of insular cortex) associated with craving during a cue-induction paradigm as compared to sham PENFS in patients with AUD.
- Active PENFS will result in a significant differential change in resting-state functional connectivity (fMRI measured) within and between addiction-related neural networks as compared to sham PENFS as evaluated with a resting state fMRI analysis in patients with AUD.
調査の概要
状態
条件
詳細な説明
研究の種類
入学 (実際)
段階
- 適用できない
連絡先と場所
研究場所
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Karnataka
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Bengaluru、Karnataka、インド、560029
- National Institute of Mental Health and Neuro sciences(NIMHANS)
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参加基準
適格基準
就学可能な年齢
健康ボランティアの受け入れ
受講資格のある性別
説明
Inclusion Criteria:
- Diagnosis of Alcohol use disorder (AUD) as per DSM(Diagnostic and Statistical Manual of Mental Disorders)-5 by two psychiatrists working in the department of psychiatry NIMHANS.
- Male gender.
- Age not less than 18 years and not more than 50 years.
- At least, moderately severe AUD as ascertained by a score above 16 in Severity of Alcohol dependence questionnaire (SADQ).
- Right-handedness as assessed with Edinburgh Handedness Inventory.
- Informed consent and willingness to come for regular follow-ups (once every two weeks) for three months after recruitment in the study.
Exclusion Criteria:
- Any diagnosis except alcohol dependence syndrome/ Tobacco dependence syndrome (to apply MINI(Mini International Neuropsychiatric Interview) screen).
Contra-indications precluding device use-
2.1 patient with cardiac implants or similar biomedical implants, 2.2 during pregnancy unless medically advised, 2.3 patient with haemophilia 2.4 skin pathology 2.5 patient with diminished mental capability or physical competence about the handling of the device
- Left/ mixed handedness
- Contraindications to MRI
研究計画
研究はどのように設計されていますか？
デザインの詳細
- 主な目的：処理
- 割り当て：ランダム化
- 介入モデル：並列代入
- マスキング：ダブル
武器と介入
参加者グループ / アーム |
介入・治療 |
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アクティブコンパレータ：Active Arm
Active arm: Auricular Percutaneous Electrical Neural Field Stimulation (PENFS) device will stimulate the outer auditory canal.
It will deliver with a pulse width of 500 ms.
The stimulation frequency pattern is 1.12Hz(hertz), 2.24Hz,4.56Hz,
9.12Hz, 100Hz then 9.12Hz, 4.56Hz,2.28Hz,1.12Hz.
This cycle will keep on continuing.
An input voltage will be 4.2V(volt).
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This is a Small electronic circuit board with a minimal number of electronic components in it, which is powered by three zinc-air batteries. Each battery consists of 1.4v of charge. From this charge, the circuit produces a maximum voltage of 3.4V under no load condition. The produced Voltage is driven as output by using the three stimulation wires, and the fourth insulated wire acts as a ground. The wires are Bio-compatible and do not have any impact when in contact with the human skin. The wire is attached with a needle to transfer the produced voltage into the nerves of the human ear. The sterilized needle (Titanium) is attached at the end of the wire through a snap fit ring. All the materials used are gone through necessary safety and performance testing including bio-compatibility and sterility testing, wherever necessary. |
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偽コンパレータ：Sham Arm
Sham arm: Auricular Percutaneous Electrical Neural Field Stimulation (PENFS) device will stimulate centre of the left ear lobe to a pulse width of 500 ms at same pattern of stimulation frequency mentioned in active PENFS with an input voltage of 4.2V
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This is a Small electronic circuit board with a minimal number of electronic components in it, which is powered by three zinc-air batteries. Each battery consists of 1.4v of charge. From this charge, the circuit produces a maximum voltage of 3.4V under no load condition. The produced Voltage is driven as output by using the three stimulation wires, and the fourth insulated wire acts as a ground. The wires are Bio-compatible and do not have any impact when in contact with the human skin. The wire is attached with a needle to transfer the produced voltage into the nerves of the human ear. The sterilized needle (Titanium) is attached at the end of the wire through a snap fit ring. All the materials used are gone through necessary safety and performance testing including bio-compatibility and sterility testing, wherever necessary. |
この研究は何を測定していますか？
主要な結果の測定
結果測定 |
メジャーの説明 |
時間枠 |
|---|---|---|
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Craving scores
時間枠：90 days
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Change in craving scores measured with Penns Alcohol Craving Scale between baseline and equispaced 6 follow-ups (every 15 days) for 3 months. Scale Information:
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90 days
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二次結果の測定
結果測定 |
メジャーの説明 |
時間枠 |
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Cue-induced craving resting state fMRI
時間枠：14 days
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Change in Cue-induced craving as measured by the VICE protocol 6-minute Visual Image Induced Craving for Ethanol (VICE) paradigm fMRI and resting state fMRI neurohemodynamic changes in the dorsolateral prefrontal cortex, anterior cingulate cortex (ACC) and insular cortex (IC) after 14 days PENFS. Time-Points are as follows: Time 0 is on the day of recruitment. Time 1 is on Day 14 of recruitment. |
14 days
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協力者と研究者
スポンサー
捜査官
- 主任研究者：Diptadhi Mukherjee, MBBS,DM、National Institute of Mental Health and Neuro sciences(NIMHANS)
出版物と役立つリンク
一般刊行物
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- Frangos E, Ellrich J, Komisaruk BR. Non-invasive Access to the Vagus Nerve Central Projections via Electrical Stimulation of the External Ear: fMRI Evidence in Humans. Brain Stimul. 2015 May-Jun;8(3):624-36. doi: 10.1016/j.brs.2014.11.018. Epub 2014 Dec 6.
- Miranda A, Taca A. Neuromodulation with percutaneous electrical nerve field stimulation is associated with reduction in signs and symptoms of opioid withdrawal: a multisite, retrospective assessment. Am J Drug Alcohol Abuse. 2018;44(1):56-63. doi: 10.1080/00952990.2017.1295459. Epub 2017 Mar 16. Erratum In: Am J Drug Alcohol Abuse. 2018;44(4):498.
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