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No Guts No Glory Probiotics (NGNGP)

2026年5月18日 更新者:University Medical Center Groningen

Probiotic Formulation to Prevent or Mitigate Antipsychotic Induced Metabolic Side-effects - A Multi-centre Randomized Placebo-controlled Double-blind Trial

The goal of this clinical trial is to learn if probiotics work to prevent or reduce metabolic side effects caused by antipsychotic medication in adults.

The main question it aims to answer is:

Do probiotics reduce weight gain, blood sugar levels, and blood fat levels in people using antipsychotics?

Researchers will compare a probiotic (Ecologic® Barrier) to a placebo (a look-alike powder without active bacteria) to see if the probiotic is effective.

Participants will:

Take either probiotics or a placebo daily for 12 weeks (3 months) Dissolve two sachets in water and drink them each morning Visit the clinic (or receive home visits) four times: at the start, after 6 weeks, and after 12 weeks, plus an initial screening visit Undergo physical measurements (e.g., weight, blood pressure), complete questionnaires, and perform a cognitive test at specific visits Provide blood samples and stool samples at the beginning and end of the study Complete two 3-day food diaries during the study

調査の概要

詳細な説明

Antipsychotic medications such as olanzapine, quetiapine, clozapine, and risperidone are widely used for the treatment of psychotic and mood disorders. Although effective, these medications are frequently associated with adverse metabolic effects, including weight gain, increased blood glucose levels, and dyslipidemia. These side effects can negatively impact physical health and increase the risk of cardiovascular disease and diabetes.

Emerging evidence suggests that the gut microbiome may play a role in metabolic regulation and that modulation of gut microbiota through probiotics could mitigate antipsychotic-induced metabolic disturbances. Probiotics are live microorganisms that, when administered in adequate amounts, may confer health benefits by improving gut barrier function and influencing metabolic processes.

This study is a randomized, double-blind, placebo-controlled clinical trial designed to investigate the efficacy and safety of a multispecies probiotic formulation (Ecologic® Barrier) in preventing or reducing metabolic side effects in patients initiating treatment with antipsychotic medication. A total of 112 participants will be enrolled and randomly assigned to receive either the probiotic or a placebo for a duration of 12 weeks.

The investigational product consists of a powder formulation containing nine bacterial strains, administered as two sachets dissolved in water once daily in the morning. The placebo consists of an inert powder (e.g., maize starch and maltodextrin) with identical appearance and administration schedule. Participants, investigators, and study personnel will remain blinded to treatment allocation throughout the study.

Participants will continue their standard psychiatric treatment, including antipsychotic and/or mood-stabilizing medication, with minimal changes where possible. Concomitant use of additional psychotropic medications such as a second antipsychotic, lithium, or antiepileptic drugs is permitted.

Study procedures include baseline, interim (6 weeks), and end-of-study (12 weeks) assessments. These assessments involve physical measurements (e.g., body weight, waist and hip circumference, blood pressure), laboratory analyses of metabolic parameters using blood samples, and stool sample collection for microbiome-related analyses. In addition, participants will complete validated questionnaires assessing quality of life, eating behavior, and gastrointestinal symptoms, as well as cognitive testing at baseline and study completion.

Dietary intake will be monitored using two 3-day food diaries (pre-intervention and prior to the final visit) to account for potential dietary influences on metabolic outcomes and gut microbiota.

The primary objective is to evaluate whether probiotic supplementation reduces antipsychotic-induced metabolic disturbances compared to placebo. Secondary objectives include assessing safety and tolerability, as well as exploring changes in gastrointestinal symptoms, cognitive functioning, and potential microbiome-related mechanisms.

The total study duration per participant is approximately 3 months, with an additional optional one-month post-study probiotic use. After study completion, treatment allocation will be unblinded. Participants will be monitored throughout the study for adverse events, with particular attention to gastrointestinal symptoms, which are expected to be mild and transient.

This study aims to provide further evidence on the role of probiotics as a low-risk, adjunctive intervention to improve metabolic health in patients treated with antipsychotic medication.

研究の種類

介入

入学 (推定)

112

段階

  • フェーズ2
  • フェーズ 3

連絡先と場所

このセクションには、調査を実施する担当者の連絡先の詳細と、この調査が実施されている場所に関する情報が記載されています。

研究連絡先

研究場所

    • Provincie Friesland
      • Leeuwarden、Provincie Friesland、オランダ、8911KJ
        • 募集
        • KieN VIP Leeuwarden
        • コンタクト:
          • Marrit Wiersma
          • 電話番号:+31614734656
          • メールmarrit@kien.nu
        • コンタクト:
        • 主任研究者:
          • Nynke Boonstra, PhD
    • Provincie Groningen
      • Groningen、Provincie Groningen、オランダ、9713GZ
        • 募集
        • University Medical Center Groningen
        • コンタクト:
        • 主任研究者:
          • Iris E.C. Sommer, MD, PhD
    • South Holland
      • Rotterdam、South Holland、オランダ、3083AK
        • 募集
        • Antes Parnassia Groep
        • コンタクト:
        • 主任研究者:
          • Nico van Beveren, MD, PhD

参加基準

研究者は、適格基準と呼ばれる特定の説明に適合する人を探します。これらの基準のいくつかの例は、人の一般的な健康状態または以前の治療です。

適格基準

就学可能な年齢

  • 大人
  • 高齢者

健康ボランティアの受け入れ

いいえ

説明

Inclusion Criteria:

  1. About to start, or having started within the last 8 weeks, antipsychotic treatment with olanzapine, quetiapine*, clozapine or risperidone for treating psychosis
  2. Aged between 18 - 65
  3. No exposure to these four antipsychotic medications for longer than one week continuously in the last 6 months (except starting the treatment with the current medication 8 weeks prior to the inclusion)
  4. The participant understands the study and is able to provide written informed consent.

    • Quetiapine prescribed in a low dose for use as a sleep aid does not apply

Exclusion Criteria:

  1. Critically ill patients (e.g. ICU), diagnosed comorbid eating disorders, chronic GI-disorders, disorders of the liver or pancreas, pre-existing diagnosed diabetes mellitus or metabolic syndrome
  2. Current use of medications known to target metabolism or weight (e.g, diabetes medication and GLP-1 agonists, proton pump inhibitors and diuretics/beta blockers) or use of antibiotics or probiotics (such as Yakult, Activia, or other probiotic supplements containing ≥10⁹ CFUs) in the past 4 weeks
  3. Pregnancy or breastfeeding
  4. Inability to follow the intervention or other conditions that according to the investigator might interfere with the evaluation of the study objectives as judged by the treating physician

研究計画

このセクションでは、研究がどのように設計され、研究が何を測定しているかなど、研究計画の詳細を提供します。

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:防止
  • 割り当て:ランダム化
  • 介入モデル:単一グループの割り当て
  • マスキング:トリプル

武器と介入

参加者グループ / アーム
介入・治療
実験的:Probiotic intervention
This group uses a probiotic formulation to prevent metabolic risk factors of antipsychotics

After informed consent, participants will be randomized 1:1 to either:

  • Intervention group: Ecologic® Barrier
  • Control group: Placebo powder (identical in appearance, taste, and packaging but without active bacterial strains)

Ecologic® Barrier

  • Dosage form: Powder formulation containing a multi-strain probiotic mixture
  • Dosage: Standard manufacturer-recommended dose per sachet
  • Frequency: Twice daily (morning and evening)
  • Route of administration: Oral, dissolved in water or another non-carbonated beverage
  • Duration: 12 weeks (3 months)
  • Distinguishing characteristics:
  • Contains a defined combination of probiotic strains specifically formulated to support gut ba- rrier integrity
  • Delivered as a powder sachet to ensure stability of live bacterial cultures
  • Designed to modulate gut-brain axis pathways relevant to antipsychotic-associated metabolic effects
他の名前:
  • Ecologic Barrier
プラセボコンパレーター:Placebo
This group uses a placebo
  • Dosage form: Powder identical in appearance, texture, and packaging to the active product
  • Dosage: One sachet per administration
  • Frequency: Twice daily
  • Route of administration: Oral
  • Duration: 12 weeks
  • Distinguishing characteristics:
  • Contains no active probiotic strains
  • Formulated to match the organoleptic properties of Ecologic® Barrier to maintain blinding
他の名前:
  • プラセボ製剤

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
Hemoglobin A1C
時間枠:From enrollment to the end of treatment at 12 weeks
Average blood glucose levels during the past 2 or 3 months
From enrollment to the end of treatment at 12 weeks

協力者と研究者

ここでは、この調査に関係する人々や組織を見つけることができます。

捜査官

  • 主任研究者:Iris E.C. Sommer, Prof. Dr.、University Medical Center Groningen

研究記録日

これらの日付は、ClinicalTrials.gov への研究記録と要約結果の提出の進捗状況を追跡します。研究記録と報告された結果は、国立医学図書館 (NLM) によって審査され、公開 Web サイトに掲載される前に、特定の品質管理基準を満たしていることが確認されます。

主要日程の研究

研究開始 (推定)

2026年6月1日

一次修了 (推定)

2029年5月1日

研究の完了 (推定)

2029年5月1日

試験登録日

最初に提出

2026年5月18日

QC基準を満たした最初の提出物

2026年5月18日

最初の投稿 (実際)

2026年5月26日

学習記録の更新

投稿された最後の更新 (実際)

2026年5月26日

QC基準を満たした最後の更新が送信されました

2026年5月18日

最終確認日

2026年5月1日

詳しくは

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個々の参加者データ (IPD) の計画

個々の参加者データ (IPD) を共有する予定はありますか?

未定

医薬品およびデバイス情報、研究文書

米国FDA規制医薬品の研究

いいえ

米国FDA規制機器製品の研究

いいえ

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