Grape Impact on Human Gut Microbiome
High-Resolution Assessment of California Table Grape Consumption on the Human Gut Microbiome-Immune Axis
Studienübersicht
Status
Status
Bedingungen
Bedingungen
Intervention / Behandlung
Intervention / Behandlung
Detaillierte Beschreibung
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.
Studientyp
Studientyp
Einschreibung (Geschätzt)
Einschreibung
Phase
Phase
- Unzutreffend
Kontakte und Standorte
Studienkontakt
Studienkontakt
- Name: Gang Fang, PhD
- Telefonnummer: 212-659-1570
- E-Mail: gang.fang@mssm.edu
Studieren Sie die Kontaktsicherung
- Name: Edward A Mead, PhD
- Telefonnummer: 212-659-6844
- E-Mail: edward.mead@mssm.edu
Studienorte
-
-
New York
-
New York, New York, Vereinigte Staaten, 10029
- Icahn School of Medicine at Mount Sinai
-
Kontakt:
- Gang Fang, PhD
- Telefonnummer: 212-659-1570
- E-Mail: gang.fang@mssm.edu
-
Kontakt:
- Edward A Mead, PhD
- Telefonnummer: 212-659-6844
- E-Mail: edward.mead@mssm.edu
-
Hauptermittler:
- Gang Fang, PhD
-
-
Teilnahmekriterien
Zulassungskriterien
Zulassungskriterien
Studienberechtigtes Alter
- Erwachsene
- Älterer Erwachsener
Akzeptiert gesunde Freiwillige
Beschreibung
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
Studienplan
Wie ist die Studie aufgebaut?
Designdetails
- Hauptzweck: Grundlegende Wissenschaft
- Zuteilung: Zufällig
- Interventionsmodell: Parallele Zuordnung
- Maskierung: Verdreifachen
Anzahl der Arme
Waffen und Interventionen
Teilnehmergruppe / ArmTeilnehmergruppe / Arm |
Intervention / BehandlungIntervention / Behandlung |
|---|---|
|
Experimental: Grape Powder
Receive grape powder for consumption during intervention stage.
|
72 g of grape powder for daily consumption for 28 days.
|
|
Placebo-Komparator: Control
Receive placebo control powder for consumption during intervention stage.
|
72 g of matching placebo for daily consumption for 28 days.
|
Was misst die Studie?
Primäre Ergebnismessungen
Primäre Ergebnismessungen
Ergebnis Maßnahme |
Maßnahmenbeschreibung |
Zeitfenster |
|---|---|---|
|
Long read sequencing
Zeitfenster: 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)
|
Sekundäre Ergebnismessungen
Sekundäre Ergebnismessungen
Ergebnis Maßnahme |
Maßnahmenbeschreibung |
Zeitfenster |
|---|---|---|
|
Fecal metabolites profile from LC-MS/MS
Zeitfenster: 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)
|
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
Zeitfenster: 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)
|
|
Fecal albumin level measured by ELISA
Zeitfenster: 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
Zeitfenster: 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)
|
Mitarbeiter und Ermittler
Sponsor
Sponsor
Ermittler
Ermittler
- Hauptermittler: Gang Fang, PhD, Icahn School of Medicine at Mount Sinai
Studienaufzeichnungsdaten
Haupttermine studieren
Studienbeginn (Geschätzt)
Studienbeginn
Primärer Abschluss (Geschätzt)
Primärer Abschluss
Studienabschluss (Geschätzt)
Studienabschluss
Studienanmeldedaten
Zuerst eingereicht
Zuerst eingereicht
Zuerst eingereicht, das die QC-Kriterien erfüllt hat
Zuerst eingereicht, das die QC-Kriterien erfüllt hat
Zuerst gepostet (Tatsächlich)
Zuerst gepostet
Studienaufzeichnungsaktualisierungen
Letztes Update gepostet (Tatsächlich)
Letztes Update gepostet
Letztes eingereichtes Update, das die QC-Kriterien erfüllt
Letztes eingereichtes Update, das die QC-Kriterien erfüllt
Zuletzt verifiziert
Zuletzt verifiziert
Mehr Informationen
Begriffe im Zusammenhang mit dieser Studie
Schlüsselwörter
Zusätzliche relevante MeSH-Bedingungen
Andere Studien-ID-Nummern
Andere Studien-ID-Nummern
- STUDY-26-00544
- IN300001209 (Andere Zuschuss-/Finanzierungsnummer: California Table Grape Commission)
Plan für individuelle Teilnehmerdaten (IPD)
Planen Sie, individuelle Teilnehmerdaten (IPD) zu teilen?
Beschreibung des IPD-Plans
IPD-Sharing-Zeitrahmen
IPD-Sharing-Zugriffskriterien
Art der unterstützenden IPD-Freigabeinformationen
- STUDIENPROTOKOLL
- SAFT
- ICF
- ANALYTIC_CODE
Arzneimittel- und Geräteinformationen, Studienunterlagen
Studiert ein von der US-amerikanischen FDA reguliertes Arzneimittelprodukt
Studiert ein von der US-amerikanischen FDA reguliertes Geräteprodukt
Produkt, das in den USA hergestellt und aus den USA exportiert wird
Diese Informationen wurden ohne Änderungen direkt von der Website clinicaltrials.gov abgerufen. Wenn Sie Ihre Studiendaten ändern, entfernen oder aktualisieren möchten, wenden Sie sich bitte an register@clinicaltrials.gov. Sobald eine Änderung auf clinicaltrials.gov implementiert wird, wird diese automatisch auch auf unserer Website aktualisiert .