Grape Impact on Human Gut Microbiome
High-Resolution Assessment of California Table Grape Consumption on the Human Gut Microbiome-Immune Axis
調査の概要
状態
状態
条件
条件
介入・治療
介入・治療
詳細な説明
The human gut microbiome consists of trillions of microorganisms that are essential to host metabolism, immune system regulation, and the maintenance of disease resistance. Recent findings indicate that dietary changes can rapidly and significantly alter the composition of these microbial communities, leading to substantial effects on the host's overall physiology. Foods rich in polyphenols are highly effective at modulating this environment because they possess selective antimicrobial properties and exert beneficial prebiotic effects on the resident microbiota.
Polyphenol-rich foods beneficially modulate the human gut microbiome with downstream metabolic and immune effects. California table grapes contain a complex mixture of phenolics, resveratrol, flavans, flavonols, and anthocyanins, making them ideal candidates for investigating gastrointestinal and immune health. However, previous grape-microbiome studies have been limited by small sample sizes (n=21-29), short durations (2 weeks), low-resolution microbiome technologies (16S profiling), and failure to measure corresponding inflammatory or immune biomarkers.
This project will first conduct a microbiome screening phase in up to 300 healthy adults to identify individuals who meet pre-specified microbiome and other study eligibility criteria. Eligible individuals may then be invited to participate in a rigorous, multi-omic pilot study using standardized freeze-dried grape powder to determine how daily grape consumption modulates the gut microbiome-immune axis in up to 40 healthy adults. The study team will employ state-of-the-art metagenomic sequencing to achieve high-resolution microbiome profiling; metabolomic analysis; and immune biomarker profiling to assess gastrointestinal inflammation.
Specific Aims
Overarching Goal: To build on our unique expertise in high-resolution microbiome analyses to conduct a rigorous, multi-omic pilot study determining how daily consumption of California table grape powder modulates the human gut microbiome-immune axis in healthy adults.
Hypothesis: Compared to a placebo, daily consumption of California table grape powder will beneficially modulate the gut microbiome by: (1) altering microbial composition; (2) shifting the fecal metabolome to increase grape-derived and microbial-derived anti-inflammatory compounds; and (3) reducing baseline biomarkers of gastrointestinal inflammation.
研究の種類
研究の種類
入学 (推定)
入学
段階
段階
- 適用できない
連絡先と場所
研究連絡先
研究連絡先
- 名前:Gang Fang, PhD
- 電話番号:212-659-1570
- メール:gang.fang@mssm.edu
研究連絡先のバックアップ
- 名前:Edward A Mead, PhD
- 電話番号:212-659-6844
- メール:edward.mead@mssm.edu
研究場所
-
-
New York
-
New York、New York、アメリカ、10029
- Icahn School of Medicine at Mount Sinai
-
コンタクト:
- Gang Fang, PhD
- 電話番号:212-659-1570
- メール:gang.fang@mssm.edu
-
コンタクト:
- Edward A Mead, PhD
- 電話番号:212-659-6844
- メール:edward.mead@mssm.edu
-
主任研究者:
- Gang Fang, PhD
-
-
参加基準
適格基準
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
説明
Inclusion Criteria
- Healthy adults between the ages of 45 and 65 years old
- Body Mass Index (BMI) within the range of 18.5 to 25.9 kg/m²
- Willing and able to provide informed consent
- Agreement to maintain usual dietary patterns throughout the study, except for the provided study powder
- Agreement to avoid exclusion criteria (below) during the study period
- Able and willing to collect and mail a stool sample during the microbiome screening phase and, if enrolled in the intervention phase, and at the three defined study timepoints
- For enrollment into the intervention phase, meeting pre-specified microbiome eligibility criteria based on the screening stool sample, as defined in the study protocol.
Exclusion Criteria
- Antibiotic use within 6 months prior to enrollment, or any planned antibiotic use during the study
- Recent initiation of or dose change in any medication or supplement within 3 months prior to enrollment, or planned initiation or dose change during the study
- Initiation or change of probiotic, prebiotic, or synbiotic supplements during the study. Existing long-term stable probiotic use is permitted
- Current or recent (within 3 months) systemic corticosteroid, biologic, DMARD, chemotherapy, or other immunosuppressive therapy; regular NSAID use (more than 2 doses per week); or planned initiation of any of the above during the study
- Active inflammatory bowel disease, irritable bowel syndrome with current symptoms, celiac disease, microscopic colitis, active diverticulitis, or acute gastrointestinal infection within 3 months; any history of C. difficile infection; or prior bariatric surgery or bowel resection
- Uncontrolled or unstable chronic disease, including but not limited to uncontrolled diabetes (HbA1c >8%), chronic hepatitis B or C, cirrhosis, moderate-to-severe chronic kidney disease (eGFR <60), active or recent (within 5 years) malignancy, solid organ or bone marrow transplant, or uncontrolled cardiovascular or psychiatric illness
- Planned major change in diet, physical activity, or lifestyle during the study period; recent significant weight change (>5% in 3 months); or current adherence to an extreme dietary pattern (strict vegan, ketogenic, carnivore, or very-low-carb) maintained for more than 3 months
- Habitual high polyphenol intake, including daily consumption of more than 2 servings of berries, more than 500 mL of red wine, more than 4 cups of tea, or regular consumption of pomegranate, grape juice, or dark chocolate more than 3 times per week, as assessed by screening food-frequency questionnaire
- Heavy alcohol use (more than 14 drinks per week), current tobacco use, or daily cannabis use
- Known grape allergy or sensitivity; pregnancy, planned pregnancy, or breastfeeding during the study; current participation in other interventional clinical trials; or any condition that, in the investigator's judgment, would compromise study participation, compliance, or data interpretation
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:基礎科学
- 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
アーム数
武器と介入
参加者グループ / アーム参加者グループ / アーム |
介入・治療介入・治療 |
|---|---|
|
実験的:Grape Powder
Receive grape powder for consumption during intervention stage.
|
72 g of grape powder for daily consumption for 28 days.
|
|
プラセボコンパレーター:Control
Receive placebo control powder for consumption during intervention stage.
|
72 g of matching placebo for daily consumption for 28 days.
|
この研究は何を測定していますか?
主要な結果の測定
主要な結果の測定
結果測定 |
メジャーの説明 |
時間枠 |
|---|---|---|
|
Long read sequencing
時間枠:3 collections at T0 (after 3 weeks of dietary control), at week 4 (after grape or placebo powder daily), and at week 8 (after 4 weeks of returning back to normal diet)
|
Sequencing DNA from fecal samples to identify bacteria.
This will assess whether the grape powder induces a change in the abundance of beneficial species/decrease in harmful species, following treatment, compared to control.
This will be quantitatively assessed via sequencing.
|
3 collections at T0 (after 3 weeks of dietary control), at week 4 (after grape or placebo powder daily), and at week 8 (after 4 weeks of returning back to normal diet)
|
二次結果の測定
二次結果の測定
結果測定 |
メジャーの説明 |
時間枠 |
|---|---|---|
|
Fecal metabolites profile from LC-MS/MS
時間枠:3 collections at T0 (after 3 weeks of dietary control), at week 4 (after grape or placebo powder daily), and at week 8 (after 4 weeks of returning back to normal diet)
|
Fecal metabolites as measured by liquid chromatography-tandem mass spectrometry (LC-MS/MS)
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3 collections at T0 (after 3 weeks of dietary control), at week 4 (after grape or placebo powder daily), and at week 8 (after 4 weeks of returning back to normal diet)
|
|
Fecal calprotectin level measured by ELISA
時間枠:3 collections at T0 (after 3 weeks of dietary control), at week 4 (after grape or placebo powder daily), and at week 8 (after 4 weeks of returning back to normal diet)
|
Fecal calprotectin as measured by ELISA.
Elevated levels of calprotectin are a sensitive indicator of mucosal irritation.
|
3 collections at T0 (after 3 weeks of dietary control), at week 4 (after grape or placebo powder daily), and at week 8 (after 4 weeks of returning back to normal diet)
|
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Fecal albumin level measured by ELISA
時間枠:3 collections at T0 (after 3 weeks of dietary control), at week 4 (after grape or placebo powder daily), and at week 8 (after 4 weeks of returning back to normal diet)
|
Fecal albumin as measured by ELISA.
Fecal albumin serves as a proxy for intestinal permeability, as its presence in the gut lumen suggests a leak across the epithelial barrier.
|
3 collections at T0 (after 3 weeks of dietary control), at week 4 (after grape or placebo powder daily), and at week 8 (after 4 weeks of returning back to normal diet)
|
|
Fecal Lipocalin-2 measured by ELISA
時間枠:3 collections at T0 (after 3 weeks of dietary control), at week 4 (after grape or placebo powder daily), and at week 8 (after 4 weeks of returning back to normal diet)
|
Fecal Lipocalin-2 as measured by ELISA.
Fecal Lipocalin-2 is produced by both epithelial and immune cells in response to bacterial stressors.
|
3 collections at T0 (after 3 weeks of dietary control), at week 4 (after grape or placebo powder daily), and at week 8 (after 4 weeks of returning back to normal diet)
|
協力者と研究者
捜査官
捜査官
- 主任研究者:Gang Fang, PhD、Icahn School of Medicine at Mount Sinai
研究記録日
主要日程の研究
研究開始 (推定)
研究開始
一次修了 (推定)
一次修了
研究の完了 (推定)
研究の完了
試験登録日
最初に提出
最初に提出
QC基準を満たした最初の提出物
QC基準を満たした最初の提出物
最初の投稿 (実際)
最初の投稿
学習記録の更新
投稿された最後の更新 (実際)
投稿された最後の更新
QC基準を満たした最後の更新が送信されました
QC基準を満たした最後の更新が送信されました
最終確認日
最終確認日
詳しくは
本研究に関する用語
追加の関連 MeSH 用語
その他の研究ID番号
その他の研究ID番号
- STUDY-26-00544
- IN300001209 (その他の助成金/資金番号:California Table Grape Commission)
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?
IPD プランの説明
IPD 共有時間枠
IPD 共有アクセス基準
IPD 共有サポート情報タイプ
- STUDY_PROTOCOL
- SAP
- ICF
- ANALYTIC_CODE
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
米国FDA規制機器製品の研究
米国で製造され、米国から輸出された製品。
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