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Effects of Different Fish Oil Types on Type 2 Diabetes Risk Factors in High-Risk Adults (END-T2D)

2026年5月8日 更新者:May Faraj, PDt, PhD

Role of EPA and DHA as Tailored Therapy for People Living With Obesity and High-risk for Type 2 Diabetes (END-T2D): a Randomized Controlled Trial

The purpose of this clinical trial is to find out whether one type of fish oil works better than another at improving metabolic health in people who are at high risk of developing type 2 diabetes.

Some metabolic problems-such as difficulty controlling blood sugar, unhealthy particles that transport cholesterol in the blood, and poor fat tissue function-can increase the risk of type 2 diabetes. This study aims to determine whether different types of fish oil can:

  1. Improve how well the body produces insulin and responds to it,
  2. Improve the quality of the particles that carry "bad" cholesterol in the blood, and 3) Improve the health and function of participants' fat tissue.

To answer these questions, researchers will compare the effects of two types of fish oil: EPA (eicosapentaenoic acid) and DHA (docosahexaenoic acid). These will be compared with corn oil, which is used as a placebo and does not contain EPA or DHA.

When included in this study, participants will:

A) Take softgel capsules containing EPA, DHA, or placebo (corn oil) every day for 12 weeks, B) Keep a daily log to record when they take their study softgels, and C) Visit the research unit six times, including one and a half days before and after the intervention, to complete specialized metabolic tests that are mostly only available in research settings.

調査の概要

状態

まだ募集していません

条件

介入・治療

詳細な説明

Background and Rationale:

According to the International Diabetes Federation, about 590 million adults worldwide-or 1 in 9 adults-were living with diabetes in 2025, most of whom had type 2 diabetes (T2D). An additional 230 million adults (about 4 in 10) are unaware that they have diabetes and therefore remain undiagnosed. Diabetes substantially increases the risk of illness and death and has an impact comparable to aging approximately 15 years, making it a leading cause of disability and mortality worldwide.

Type 2 diabetes develops gradually as multiple risk factors accumulate over time, including unhealthy lifestyle habits and aging. These factors reduce the body's ability to produce insulin and/or respond effectively to insulin, a hormone that regulates blood sugar levels. As a result, blood sugar levels progressively rise and may eventually lead to a diagnosis of T2D.

Importantly, type 2 diabetes is preventable.

In people with T2D, elevated blood levels of apolipoprotein B (apoB) increase the risk of cardiovascular disease (apoB is a measure of the number of particles that carry "bad" cholesterol known as low density lipoproteins (LDL)). Traditionally, high apoB levels were considered a consequence of T2D. However, research from the principal investigator's laboratory has shown that high apoB levels may also contribute to the development of T2D.

This appears to occur because LDL particles can promote inflammation and impair the normal function of fat tissue. Poorly functioning fat tissue is associated with multiple metabolic abnormalities that increase the risk of both T2D and cardiovascular disease. Large population based studies confirmed that elevated blood apoB levels can predict the development of T2D many years before diagnosis.

Recent findings from the research team also indicate that 12 week supplementation with marine derived omega 3 fatty acids, EPA (eicosapentaenoic acid) and DHA (docosahexaenoic acid), can improve several risk factors for T2D, particularly in individuals with higher blood apoB levels. However, these data suggest that EPA and DHA may not provide identical benefits in reducing these risk factors.

Study Objective:

The overall aim of this study is to compare the effects of EPA versus DHA on major risk factors for T2D in adults with overweight or obesity and elevated blood apoB levels.

Study Design and Procedures:

After eligibility is confirmed, participants will visit the research institute (IRCM) for two baseline visits scheduled one week apart. During these visits, investigators will used specialized metabolic testing to:

  1. Assess how participants' bodies process glucose and produce insulin using blood samples, and
  2. Examine how participants' fat tissue responds to their own LDL using a small fat tissue biopsy.

Participants will then be randomly assigned to follow one of three interventions for 12 weeks: EPA, DHA or corn oil (placebo). At the end of the 12 week intervention, participants will return to the research institute to undergo the same assessments performed at baseline.

Data Analysis:

At the conclusion of the study, results from participants in each intervention group (EPA, DHA, and placebo) will be averaged and compared. This will allow researchers to determine the effects of EPA and DHA on key risk factors for T2D and to evaluate whether one omega 3 fatty acid is more effective than the other.

研究の種類

介入

入学 (推定)

84

段階

  • フェーズ2

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

研究連絡先のバックアップ

研究場所

    • Quebec
      • Montreal、Quebec、カナダ、H2W 1R7
        • Institut de recherches cliniques de Montréal (IRCM)
        • コンタクト:
        • 主任研究者:
          • May Faraj, P.Dt., Ph.D.
        • 副調査官:
          • Study physician: Remi Rabasa-Lhoret, M.D., Ph.D.

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

はい

説明

Inclusion Criteria:

Males and post-menopausal females:

  • With a body mass index (BMI >25-40 kg/m2)
  • Having confirmed menopausal status (FSH ≥ 30 U/l)
  • Non-smokers (tobacco) or have quitted for over a year
  • Low-moderate alcohol consumption: <7 alcoholic servings/ week
  • Plasma apoB ≥1.05 g/L

Exclusion Criteria:

  • Elevated risk of cardiovascular disease (≥ 20% of calculated Framingham Risk Score)
  • Prior history of cardiovascular events (e.g. stroke, transient ischemic attack, myocardial infarction, angina, heart failure, arrhythmias, flutter, atrial …)
  • Systolic blood pressure > 140 mmHg or diastolic blood pressure > 90 mmHg
  • Diabetes or HbA1c ≥ 6.5%
  • Reactive hypoglycaemia
  • Prior history of cancer within the last 3 years or if lymph nodes were removed
  • Thyroid disease - untreated or unstable Synthroid dose
  • Severe renal dysfunction - eGFR < 30 mL/min/1.73 m²
  • Hepatic dysfunction - AST/ALT > 3 times normal limit
  • Anemia - Hb < 120 g/L in females and < 130 in males
  • Bleeding disorders
  • Blood coagulation problems (i.e. bleeding predisposition)
  • Malabsorptive disease or surgeries (e.g. bariatric surgeries)
  • Autoimmune and chronic inflammatory disease (i.e. celiac, inflammatory bowel, Graves, multiple sclerosis, psoriasis, rheumatoid arthritis, and lupus).
  • Chronic diarrhea
  • Cholecystectomy (e.g. removal of gall bladder)
  • Sleep apnea
  • Seizures
  • Known history of difficulties accessing a vein
  • Known history of vagal shock or loss of consciousness during blood withdrawal
  • Concomitant medications (systemic corticosteroids; hypertension medication; anti-psychotic medications - psycho-active medication that promote weight gain; anticoagulant or anti-aggregates treatment (e.g. aspirin, NSAIDs, warfarin, coumadin..); systemic adrenergic agonists; weight-loss medication (e.g. GLP-1 agonists); lipid lowering medication (e.g. statins, anti-PCSK9); )
  • Allergy to seafood/fish or corn oil
  • Allergy to bovine gelatine or glycerine (softgel components)
  • Allergy to Xylocaine (anesthesia used during fat tissue biopsy)
  • Anticipated surgery or blood transfusion
  • Known substance abuse
  • Very high physical activity (> 5 hours of aerobic exercise per week)
  • Already taking more than 1 gm of EPA and/or DHA supplementation per day
  • Lack of compliance to the study requirements (i.e. not being fasting)
  • Cancellation of the same scheduled testing visit more than once
  • Lack of time to participate in the full length of the study (18-22 weeks)
  • Other conditions deemed inappropriate by the study physician (e.g. difficulties in understanding/communicating in French or English)

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:並列代入
  • 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
アクティブコンパレータ:Eicosapentaenoic acid (EPA)
4 g EPA per day
Four softgels of Carlson Elite EPA Gems taken orally per day (NPN 80079735, 1 g EPA/softgel)
Four softgels of Carlson Elite DHA Gems taken orally per day (NPN 80079736, 1 g DHA/softgel)
アクティブコンパレータ:Docosahexaenoic acid (DHA)
4 g DHA per day
Four softgels of Carlson Elite EPA Gems taken orally per day (NPN 80079735, 1 g EPA/softgel)
Four softgels of Carlson Elite DHA Gems taken orally per day (NPN 80079736, 1 g DHA/softgel)
プラセボコンパレーター:Corn oil
0 g EPA and DHA per day
Four softgels of Carlson placebo taken orally per day (food-grade corn oil, 0 g EPA and DHA per softgel)

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
Change from baseline to 12 weeks in the disposition index
時間枠:12-weeks
Disposition index calculated as first phase glucose-induced insulin secretion multiplied by insulin sensitivity measured during the Botnia clamp [(ng C-peptide/mL)*(mg dextrose/kg/min)/(µU insulin/mL)]
12-weeks

二次結果の測定

結果測定
メジャーの説明
時間枠
Change from baseline to 12 weeks in glucose-induced insulin secretion
時間枠:12 weeks
Glucose-induced insulin secretion measured by the Botnia clamp (ng C-peptide/mL)
12 weeks
Change from baseline to 12 weeks in insulin sensitivity
時間枠:12 weeks
Insulin sensitivity measured by the Botnia clamp (mg dextrose/kg/min)/(uU insulin/mL)
12 weeks
Change from baseline to 12 weeks in the oral disposition index
時間枠:12 week
Oral disposition index calculated as insulin secretion index (0-30 min) multiplied by insulin sensitivity index measured during an oral glucose tolerance test (arbitrary unit)
12 week
Change from baseline to 12 weeks in low-density lipoprotein (LDL) size
時間枠:12 weeks
LDL size measured by Quantimetrix Lipoprint System (Å)
12 weeks
Change from baseline to 12 weeks in LDL-induced white adipose tissue (WAT) inflammation
時間枠:12 weeks
LDL-induced WAT inflammation measured as WAT gene expression of a panel of pro- and anti-inflammatory mediators/markers (e.g. NLRP3, IL1B, MCP1, IL10, TREMs) by RT-qPCR. This will be measured after the incubation of participant WAT biopsies without or with their own LDL ex vivo.
12 weeks

その他の成果指標

結果測定
メジャーの説明
時間枠
Change from baseline to 12 weeks in LDL-induced WAT inflammation
時間枠:12 weeks
LDL-induced WAT inflammation measured as WAT secretion of a panel of pro- and anti-inflammatory mediators/markers (e.g. IL-1β, MCP1, IL10) by multiplex. This will be measured after the incubation of participant WAT biopsies without or with their own LDL ex vivo.
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。

スポンサー

協力者

捜査官

  • 主任研究者:May Faraj, P.Dt., Ph.D.、Institut de recherches cliniques de Montréal (IRCM)/ Université de Montréal

出版物と役立つリンク

研究に関する情報を入力する責任者は、自発的にこれらの出版物を提供します。これらは、研究に関連するあらゆるものに関するものである可能性があります。

一般刊行物

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7月1日

一次修了 (推定)

2029年12月1日

研究の完了 (推定)

2029年12月1日

試験登録日

最初に提出

2026年5月4日

QC基準を満たした最初の提出物

2026年5月4日

最初の投稿 (実際)

2026年5月8日

学習記録の更新

投稿された最後の更新 (実際)

2026年5月12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8日

最終確認日

2026年5月1日

詳しくは

本研究に関する用語

その他の研究ID番号

  • 2026-1363
  • Award ID: EDA-25-1514974 (その他の助成金/資金番号:Diabetes Canada)

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?

いいえ

IPD プランの説明

Frozen plasma and white adipose tissue samples (when available in sufficient quantity) may be shared with other investigators for analysis. However, all statistical analyses incorporating the complete participant data will be conducted exclusively by the IRCM research team, in accordance with the Information and Consent Form signed by the participants

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

この情報は、Web サイト clinicaltrials.gov から変更なしで直接取得したものです。研究の詳細を変更、削除、または更新するリクエストがある場合は、register@clinicaltrials.gov。 までご連絡ください。 clinicaltrials.gov に変更が加えられるとすぐに、ウェブサイトでも自動的に更新されます。