Tämä sivu käännettiin automaattisesti, eikä käännösten tarkkuutta voida taata. Katso englanninkielinen versio lähdetekstiä varten.

Gut, Immune, and Vascular Health in Metabolically Healthy Obesity

torstai 23. huhtikuuta 2026 päivittänyt: Bryant Keirns, Ball State University

Impaired Gut-Vascular Axis as a Unique Driver of Cardiovascular Disease in Metabolically Healthy Obesity

The investigators seek to better understand how a single high-fat meal impacts gut, immune, and vascular outcomes in individuals with "metabolically healthy obesity" (obesity and largely normal cardiometabolic profile) and "metabolically healthy normal-weight individuals." Second, the investigators seek to understand how a prebiotic fiber (inulin) impacts gut, immune, and vascular outcomes in individuals with "metabolically healthy obesity."

Tutkimuksen yleiskatsaus

Tila

Rekrytointi

Ehdot

Interventio / Hoito

Yksityiskohtainen kuvaus

This study consists of two parts (part 1 and part 2) that are approved under the same IRB approval code. As a result, there is only one unique identifier for the entirety of this project. As a results, the investigators have included both parts in this registration.

Part 1 of project:

The investigators will recruit individuals with a BMI in the normal (18.5-24.9 kg/m2) or obesity (>30.0 kg/m2) ranges from the Ball State University campus and surrounding communities. At a screening visit, the investigators will measure metabolic syndrome risk (blood pressure, triglycerides, glucose, HDL-C) to see if individuals meet criteria for "metabolically healthy obesity" and "metabolically healthy normal-weight" - our two groups of interest.

Each participant will complete one meal trial. At the meal trial, an intravenous catheter will be inserted and baseline blood sample collected. Next, vascular assessments (i.e., flow mediated dilation [FMD], pulse wave analysis [PWA], pulse wave velocity [PWV]) will be completed. Then, participants will consume the high-fat meal consisting of heavy cream, chocolate syrup, and protein powder. The meal will contain ~700 calories (55g fat).

Following completion of the meal, blood samples will also be collected at 1-, 2-, 3-, 4-, 5-, and 6-hours. At each time point the investigators will collect serum to assess biomarkers of intestinal permeability and inflammation. Serum will also be used in mechanistic experiments where the investigators will treat endothelial cells in culture with serum from participants pre/post high-fat meal and examine differences in gene and protein expression, as well as nitric oxide production. Additional blood will be collected for peripheral blood mononuclear cell isolation at baseline and 3 hours. Vascular assessments listed above will be repeated at 2-, 4-, and 6-hours.

Participants will provide a stool sample collected at home for microbiome analyses.

Part 2 of project:

The investigators will recruit individuals with a BMI in the obesity (>30.0 kg/m2) range from the Ball State University campus and surrounding communities. At a screening visit, the investigators will measure metabolic syndrome risk (blood pressure, triglycerides, glucose, HDL-C) to see if individuals meet criteria for "metabolically healthy obesity" - our sole group of interest.

Qualifying participants will report for a baseline assessment. At the baseline assessment, the investigators will collect fasting blood samples to assess biomarkers related to gut, immune, and vascular health. Serum will also be used in mechanistic experiments where the investigators will treat endothelial cells in culture with serum from participants pre/post intervention and examine differences in gene and protein expression, as well as nitric oxide production. Next, vascular assessments (i.e., flow mediated dilation [FMD], pulse wave analysis [PWA], pulse wave velocity [PWV]) will be completed. This will conclude data collection and participants will be randomized to receive 6 weeks of supplemental inulin (a soluble fiber) or a placebo (maltodextrin). At 2-, 4-, and 6-weeks of the intervention, the same samples and measurements will be collected at in-lab visits. Stool samples will be collected at baseline and 6 weeks.

Opintotyyppi

Interventio

Ilmoittautuminen (Arvioitu)

70

Vaihe

  • Ei sovellettavissa

Yhteystiedot ja paikat

Tässä osiossa on tutkimuksen suorittajien yhteystiedot ja tiedot siitä, missä tämä tutkimus suoritetaan.

Opiskeluyhteys

Opiskelupaikat

  • Yhdysvallat
    • Indiana
      • Muncie, Indiana, Yhdysvallat, 47306
        • Rekrytointi
        • Health Professions Building

Osallistumiskriteerit

Tutkijat etsivät ihmisiä, jotka sopivat tiettyyn kuvaukseen, jota kutsutaan kelpoisuuskriteereiksi. Joitakin esimerkkejä näistä kriteereistä ovat henkilön yleinen terveydentila tai aiemmat hoidot.

Kelpoisuusvaatimukset

Opintokelpoiset iät

  • Aikuinen

Hyväksyy terveitä vapaaehtoisia

Joo

Kuvaus

Inclusion Criteria:

  • 18-55 years old.
  • BMI is 18.5-24.9 kg/m2 or >30kg/m2 (part 1). BMI > 30 kg/m2 (part 2)
  • Not pregnant or expecting to become pregnant (females only).
  • Not postmenopausal (females only).
  • Have 0-1 risk factors based on blood pressure, blood sugar, triglycerides, and HDL-cholesterol ("good cholesterol").
  • Have not been diagnosed with an advanced cardiometabolic condition (e.g., cardiovascular disease, type 2 diabetes).
  • Have not been diagnosed with a chronic inflammatory or gastrointestinal condition (e.g., rheumatoid arthritis, inflammatory bowel disease).
  • Do not regularly take anti-inflammatory drugs (more than 2x week) or are able to temporarily suspend use of anti-inflammatory drugs three days prior to the study visit.
  • Have not taken antibiotics or probiotics in the last month.
  • Do not use lipid-lowering drugs (e.g., statins), glucose-lowering drugs (e.g., metformin), or anti-hypertensive drugs.
  • Do not use weight-loss drugs (e.g., Ozempic, Wegovy).
  • Have not had any surgery that alters the stomach/gastrointestinal tract (e.g., gastric sleeve, gastric bypass).
  • Do not use tobacco products or any illicit drugs.
  • Do not have a pacemaker.
  • Do not have dietary restrictions prohibiting consumption of the provided meal (e.g., vegan/vegetarian diets, gluten-free diet, relevant food allergies).
  • Able to stay in the supine position in the dark for at least 10 minutes (related to vascular measurements)

Exclusion Criteria:

  • Not 18-55 years old.
  • BMI is not 18.5-24.9 kg/m2 or >30kg/m2 (part 1). BMI is not > 30 kg/m2 (part 2)
  • Pregnant or expecting to become pregnant (females only).
  • Postmenopausal (females only).
  • Do not have 0-1 risk factors based on blood pressure, blood sugar, triglycerides, and HDL-cholesterol ("good cholesterol").
  • Have been diagnosed with an advanced cardiometabolic condition (e.g., cardiovascular disease, type 2 diabetes).
  • Have been diagnosed with a chronic inflammatory or gastrointestinal condition (e.g., rheumatoid arthritis, inflammatory bowel disease).
  • Regularly take anti-inflammatory drugs (more than 2x week) or are unable to temporarily suspend use of anti-inflammatory drugs three days prior to the study visit.
  • Have taken antibiotics or probiotics in the last month.
  • Use lipid-lowering drugs (e.g., statins), glucose-lowering drugs (e.g., metformin), or anti-hypertensive drugs.
  • Use weight-loss drugs (e.g., Ozempic, Wegovy).
  • Have had any surgery that alters the stomach/gastrointestinal tract (e.g., gastric sleeve, gastric bypass).
  • Use tobacco products or any illicit drugs.
  • Have a pacemaker.
  • Have dietary restrictions prohibiting consumption of the provided meal (e.g., vegan/vegetarian diets, gluten-free diet, relevant food allergies).
  • Not able to stay in the supine position in the dark for at least 10 minutes (related to vascular measurements)

Opintosuunnitelma

Tässä osiossa on tietoja tutkimussuunnitelmasta, mukaan lukien kuinka tutkimus on suunniteltu ja mitä tutkimuksella mitataan.

Miten tutkimus on suunniteltu?

Suunnittelun yksityiskohdat

  • Ensisijainen käyttötarkoitus: Muut
  • Jako: Satunnaistettu
  • Inventiomalli: Rinnakkaistehtävä
  • Naamiointi: Yksittäinen

Aseet ja interventiot

Osallistujaryhmä / Arm
Interventio / Hoito
Kokeellinen: Metabolically Healthy Obesity Group
Individuals with a body mass index greater than 30 kg/m2 and 0-1 of the following risk factors: blood pressure >130/85 mmHg, triglycerides > 150 mg/dL, glucose > 100 mg/dL, and HDL-C < 50 (females) or < 40 (males).
Ravintolisä: Inulin Supplementation
Half of participants in part 2 will recieve supplemental inulin or placebo (maltodextrin).
Ravintolisä: Maltodextrin (Placebo)
Half of participants in part 2 will recieve supplemental inulin or placebo (maltodextrin).
Muut: High-fat meal
All participants in part 1 (both metabolically healthy normal weight and metabolically healthy obesity) will consume a high-fat meal designed to invoke changes in gut, immune, and vascular parameters.
Active Comparator: Metabolically Healthy Normal Weight Group
Individuals with a body mass index between 18.5-24.9 kg/m2 and 0-1 of the following risk factors: blood pressure >130/85 mmHg, triglycerides > 150 mg/dL, glucose > 100 mg/dL, and HDL-C < 50 (females) or < 40 (males).
Muut: High-fat meal
All participants in part 1 (both metabolically healthy normal weight and metabolically healthy obesity) will consume a high-fat meal designed to invoke changes in gut, immune, and vascular parameters.

Mitä tutkimuksessa mitataan?

Ensisijaiset tulostoimenpiteet

Tulosmittaus
Toimenpiteen kuvaus
Aikaikkuna
Serum lipopolysaccharide binding protein
Aikaikkuna: Through study completion, up to 2 years

Part 1: The investigators will measure lipopolysaccharide binding protein at baseline and , 1-, 2-, 3-, 4-, 5-, and 6-hours after the meal.

Part 2: The investigators will measure lipopolysaccharide binding protein at baseline and 2-, 4-, and 6-weeks post intervention.
Through study completion, up to 2 years
Serum interleukin-6
Aikaikkuna: Through study completion, up to 2 years.

Part 1: The investigators will measure interleukin-6 at baseline and , 1-, 2-, 3-, 4-, 5-, and 6-hours after the meal.

Part 2: The investigators will measure interleukin-6 at baseline and 2-, 4-, and 6-weeks post intervention.
Through study completion, up to 2 years.
Flow-mediated dilation
Aikaikkuna: Through study completion, up to 2 years
Part 1: The investigators will measure flow-mediated dilation at baseline and 2-, 4-, 6-hours after the meal. Part 2: The investigators will measure flow-mediated dilation at baseline and 2-, 4-, and 6-weeks post intervention.
Through study completion, up to 2 years
Serum C reactive protein
Aikaikkuna: Through study completion, up to 2 years
Part 2: The investigators will measure C reactive protein at baseline and 2-, 4-, and 6-weeks post intervention.
Through study completion, up to 2 years
Serum lipopolysaccharide
Aikaikkuna: Through study completion, up to 2 years
Part 1: The investigators will measure lipopolysaccharide at baseline and , 1-, 2-, 3-, 4-, 5-, and 6-hours after the meal. Part 2: The investigators will measure lipopolysaccharide at baseline and 2-, 4-, and 6-weeks post intervention.
Through study completion, up to 2 years
Serum TNF-alpha
Aikaikkuna: Through study completion, up to 2 years
The investigators will measure serum TNF-alpha at baseline and , 1-, 2-, 3-, 4-, 5-, and 6-hours after the meal. Part 2: The investigators will measure TNF-alpha at baseline and 2-, 4-, and 6-weeks post intervention.
Through study completion, up to 2 years
Serum zonulin
Aikaikkuna: Through study completion, up to 2 years.
Part 2: The investigators will measure serum zonulin at baseline and 2-, 4-, and 6-weeks post intervention.
Through study completion, up to 2 years.

Toissijaiset tulostoimenpiteet

Tulosmittaus
Toimenpiteen kuvaus
Aikaikkuna
Augmentation Index
Aikaikkuna: Through study completion, up to 2 years
Part 1: The investigators will measure augmentation index at baseline and 2-, 4-, 6-hours after the meal. Part 2: The investigators will measure augmentation index at baseline and 2-, 4-, and 6-weeks post intervention.
Through study completion, up to 2 years
Pulse-wave velocity
Aikaikkuna: Through study completion, up to 2 years
Part 1: The investigators will measure pulse-wave velocity at baseline and 2-, 4-, 6-hours after the meal. Part 2: The investigators will measure pulse wave velocity at baseline and 2-, 4-, and 6-weeks post intervention.
Through study completion, up to 2 years
Serum soluble CD14
Aikaikkuna: Through study completion, up to 2 years
Part 1: The investigators will measure serum soluble CD14 at baseline and , 1-, 2-, 3-, 4-, 5-, and 6-hours after the meal. Part 2: The investigators will measure serum soluble sCD14 at baseline and 2-, 4-, and 6-weeks post intervention.
Through study completion, up to 2 years
Serum IL-1 beta
Aikaikkuna: Through study completion, up to 2 years
Part 1: The investigators will measure serum IL-1 beta at baseline and , 1-, 2-, 3-, 4-, 5-, and 6-hours after the meal. Part 2: The investigators will measure serum IL-1beta at baseline and 2-, 4-, and 6-weeks post intervention.
Through study completion, up to 2 years
Serum soluble VCAM-1
Aikaikkuna: Through study completion, up to 2 years
Part 1: The investigators will measure serum soluble VCAM-1 at baseline and , 1-, 2-, 3-, 4-, 5-, and 6-hours after the meal.
Through study completion, up to 2 years
Peripheral blood mononuclear cell transcriptome
Aikaikkuna: Through study completion, up to 2 years
Part 1: The investigators will measure interleukin-6 at baseline and 3-hours after the meal.
Through study completion, up to 2 years
Serum treated HAEC transcriptome
Aikaikkuna: Through study completion, up to 2 years
Part 1: The investigators will measure the HAEC transcriptome after treatment with baseline and 2-, 4-, 6-hour post-meal serum. Part 2: The investigators will measure the HAEC transcriptome after treatment with serum from baseline and 2-, 4-, and 6-weeks post intervention.
Through study completion, up to 2 years
Serum treated HAEC eNOS and NFkB protein expression
Aikaikkuna: Through study completion, up to 2 years
Part 1: The investigators will measure HAEC eNOS and NFkB protein expression after treatment with baseline and 2-, 4-, 6-hour post-meal serum. Part 2: The investigators will measure HAEC eNOS and NFkB protein expression after treatment with serum from baseline and 2-, 4-, and 6-weeks post intervention.
Through study completion, up to 2 years
Microbiome composition (shotgun sequencing)
Aikaikkuna: Through study completion, up to 2 years
Part 1: The investigators will determine microbiome composition once within one week of participants completing the meal trial. Part 2: The investigators will measure microbiome composition at baseline and 6-weeks post intervention.
Through study completion, up to 2 years
Serum treated HAEC nitric oxide production
Aikaikkuna: Through study completion, up to two years.
Part 1: The investigators will measure the HAEC nitric oxide production after treatment with baseline and 2-, 4-, 6-hour post-meal serum. Part 2: The investigators will measure HAEC nitric oxide production after treatment with serum from baseline and 2-, 4-, and 6-weeks post intervention.
Through study completion, up to two years.

Muut tulostoimenpiteet

Tulosmittaus
Toimenpiteen kuvaus
Aikaikkuna
Body fat percent
Aikaikkuna: Through study completion, up to 2 years.
Part 1: The investigators will measure body fat percent using Dual-Energy X-ray Absorptiometry. Part 2: The investigators will measure body fat percent using Dual-Energy X-ray Absorptiometry at baseline and 6-weeks post intervention.
Through study completion, up to 2 years.

Yhteistyökumppanit ja tutkijat

Täältä löydät tähän tutkimukseen osallistuvat ihmiset ja organisaatiot.

Sponsori

Ball State University

Tutkijat

  • Päätutkija: Bryant Keirns, PhD, Ball State University

Opintojen ennätyspäivät

Nämä päivämäärät seuraavat ClinicalTrials.gov-sivustolle lähetettyjen tutkimustietueiden ja yhteenvetojen edistymistä. National Library of Medicine (NLM) tarkistaa tutkimustiedot ja raportoidut tulokset varmistaakseen, että ne täyttävät tietyt laadunvalvontastandardit, ennen kuin ne julkaistaan ​​julkisella verkkosivustolla.

Opi tärkeimmät päivämäärät

Opiskelun aloitus (Todellinen)

Sunnuntai 1. maaliskuuta 2026

Ensisijainen valmistuminen (Arvioitu)

Keskiviikko 1. joulukuuta 2027

Opintojen valmistuminen (Arvioitu)

Keskiviikko 1. joulukuuta 2027

Opintoihin ilmoittautumispäivät

Ensimmäinen lähetetty

Torstai 16. huhtikuuta 2026

Ensimmäinen toimitettu, joka täytti QC-kriteerit

Torstai 23. huhtikuuta 2026

Ensimmäinen Lähetetty (Todellinen)

Torstai 30. huhtikuuta 2026

Tutkimustietojen päivitykset

Viimeisin päivitys julkaistu (Todellinen)

Torstai 30. huhtikuuta 2026

Viimeisin lähetetty päivitys, joka täytti QC-kriteerit

Torstai 23. huhtikuuta 2026

Viimeksi vahvistettu

Keskiviikko 1. huhtikuuta 2026

Lisää tietoa

Tähän tutkimukseen liittyvät termit

Avainsanat

Muita asiaankuuluvia MeSH-ehtoja

Muut tutkimustunnusnumerot

  • IRB-FY2026-239

Yksittäisten osallistujien tietojen suunnitelma (IPD)

Aiotko jakaa yksittäisten osallistujien tietoja (IPD)?

JOO

IPD-suunnitelman kuvaus

ClinicalTrials.gov NCBI BioProject NCBI Reference Sequence Open Science Framework (general) Sequence Read Archive (SRA)

IPD-jaon aikakehys

12/31/2027

Lääke- ja laitetiedot, tutkimusasiakirjat

Tutkii yhdysvaltalaista FDA sääntelemää lääkevalmistetta

Ei

Tutkii yhdysvaltalaista FDA sääntelemää laitetuotetta

Ei

Nämä tiedot haettiin suoraan verkkosivustolta clinicaltrials.gov ilman muutoksia. Jos sinulla on pyyntöjä muuttaa, poistaa tai päivittää tutkimustietojasi, ota yhteyttä register@clinicaltrials.gov. Heti kun muutos on otettu käyttöön osoitteessa clinicaltrials.gov, se päivitetään automaattisesti myös verkkosivustollemme .

Tilaa