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Glycemic Load & Resistance Training on Endothelial Function & Insulin Sensitivity (GET FIT)

12. november 2020 opdateret af: University of California, Los Angeles
This project is prompted by the urgent public health need to identify novel strategies to prevent cardiovascular disease (CVD) and type 2 diabetes (T2D). The higher prevalence of CVD, T2D, and metabolic syndrome in obese individuals is a major healthcare concern. Therefore, finding optimal intervention strategies to combat these growing epidemics is imperative.

Studieoversigt

Status

Afsluttet

Betingelser

Intervention / Behandling

Detaljeret beskrivelse

At present, the extent to which dietary components can modify endothelial function, monocyte inflammation and glycemic variations is not well defined, although different carbohydrates are known to vary in their abilities to induce plasma glucose and insulin responses. Epidemiologic work suggests that high dietary glycemic load (GL) is associated with increased concentrations of inflammatory cytokines, endothelial dysfunction markers, and increased risk of T2D and coronary heart disease (CHD). We are examining using randomized control trials low vs. high-GL diet to determine if low-GL diets induce improvements in endothelial function or monocyte inflammation. Furthermore, resistance training is an alternate form of exercise from conventional aerobic training. Resistance Training has the potential to improve endothelial function or monocyte phenotype, but there is very little data in this area. We hypothesize that resistance training may augment the beneficial effects of a low-GL diet in improving metabolic health.

Undersøgelsestype

Interventionel

Tilmelding (Faktiske)

88

Fase

  • Ikke anvendelig

Kontakter og lokationer

Dette afsnit indeholder kontaktoplysninger for dem, der udfører undersøgelsen, og oplysninger om, hvor denne undersøgelse udføres.

Studiesteder

  • Forenede Stater
    • California
      • Los Angeles, California, Forenede Stater, 90095
        • University of California, Los Angeles

Deltagelseskriterier

Forskere leder efter personer, der passer til en bestemt beskrivelse, kaldet berettigelseskriterier. Nogle eksempler på disse kriterier er en persons generelle helbredstilstand eller tidligere behandlinger.

Berettigelseskriterier

Aldre berettiget til at studere

18 år til 35 år (Voksen)

Tager imod sunde frivillige

Ja

Køn, der er berettiget til at studere

Alle

Beskrivelse

Inclusion Criteria:

  • 18-35 with BMI≥30 and/or your waist circumference ≥40 inches for males or ≥35 inches for females
  • In good health as determined by the screening visit and review of medical history

Exclusion Criteria:

  • Have a known heart arrhythmia and/or abnormalities found in electrocardiogram (ECG) reading or use of medications that influence CV function
  • Have been in a weight loss or exercise program in the 6 months prior to participation
  • Use tobacco products
  • Have a syndrome or are prescribed medications that may influence body composition, insulin action, or CVD (e.g. PCOS, prednisone, methylphenidate, etc.)
  • Have intolerance to lactose or gluten
  • Pregnant

Studieplan

Dette afsnit indeholder detaljer om studieplanen, herunder hvordan undersøgelsen er designet, og hvad undersøgelsen måler.

Hvordan er undersøgelsen tilrettelagt?

Design detaljer

  • Primært formål: Behandling
  • Tildeling: Randomiseret
  • Interventionel model: Faktoriel opgave
  • Maskning: Ingen (Åben etiket)

Våben og indgreb

Deltagergruppe / Arm
Intervention / Behandling
Eksperimentel: Low Glycemic Load + Resistance Training
12-week intervention diet + resistance training (1 hour, 3 times per week)
Andet: Modstandstræning
Andet: Glycemic Load
Eksperimentel: High Glycemic Load + Resistance Training
12-week control diet + resistance training (1 hour, 3 times per week)
Andet: Modstandstræning
Andet: Glycemic Load
Eksperimentel: Low Glycemic Load
12-week intervention diet
Andet: Glycemic Load
Andet: High Glycemic Load
12-week control diet
Andet: Glycemic Load

Hvad måler undersøgelsen?

Primære resultatmål

Resultatmål
Tidsramme
Endothelial function as determined by brachial artery FMD
Tidsramme: 12 weeks
12 weeks

Sekundære resultatmål

Resultatmål
Tidsramme
monocyte inflammation
Tidsramme: 12 weeks
12 weeks
Insulin Sensitivity by Oral Glucose Tolerance Test
Tidsramme: 12 weeks
12 weeks
MAGE via Continuous Glucose Monitoring System
Tidsramme: 12 weeks
12 weeks

Andre resultatmål

Resultatmål
Foranstaltningsbeskrivelse
Tidsramme
body composition (total fat mass, visceral fat, HFF, LBM) via DXA and MRI
Tidsramme: 12 weeks
12 weeks
plasma and cellular biomarkers post pre and post 12 week intervention
Tidsramme: 12 weeks

Monocytes will be isolated from subject whole blood and will be phenotyped in 2 ways: 1) as pro- or anti-inflammatory based on flow-activated cell sorting (FACS) analysis of monocyte-specific markers TLR-4, CD14 and CD16.

Serum-Stimulated Cell Culture. Subject serum will be incubated with L6 cells as we have previously performed in monocytes and adipocytes as well as endothelial cells 18, 130. Following 48 hr incubation, cellular insulin-stimulated glucose transport will be assayed as described 129 and conditioned medium assayed for myokine levels (ex. IL-15, 1L-6, etc).

Fasting plasma (and conditioned media where appropriate) will be taken to determine a panel of adipokines and hormones (e.g. insulin, adiponectin, HSP-72, IL-4, IL-6, IL-10, MCP-1, CRP, 8-iso PGF2α) will be measured using the Millipore Multiplex assay kit or with specific ELISA kits
12 weeks
RNA/protein levels via muscle and fat tissue collection
Tidsramme: 12 weeks
Approximately 300 mg of muscle tissue from the superficial portion of the vastus lateralis and approximately 3-5 g of subcutaneous adipose tissue from the periumbilical portion of the abdomen will be obtained.
12 weeks

Samarbejdspartnere og efterforskere

Det er her, du vil finde personer og organisationer, der er involveret i denne undersøgelse.

Sponsor

University of California, Los Angeles

Efterforskere

  • Ledende efterforsker: Catherine Carpenter, PhD, MPH, University of California, Los Angeles

Datoer for undersøgelser

Disse datoer sporer fremskridtene for indsendelser af undersøgelsesrekord og resumeresultater til ClinicalTrials.gov. Studieregistreringer og rapporterede resultater gennemgås af National Library of Medicine (NLM) for at sikre, at de opfylder specifikke kvalitetskontrolstandarder, før de offentliggøres på den offentlige hjemmeside.

Studer store datoer

Studiestart

1. april 2012

Primær færdiggørelse (Faktiske)

14. december 2017

Studieafslutning (Faktiske)

14. december 2017

Datoer for studieregistrering

Først indsendt

11. oktober 2012

Først indsendt, der opfyldte QC-kriterier

19. december 2012

Først opslået (Skøn)

24. december 2012

Opdateringer af undersøgelsesjournaler

Sidste opdatering sendt (Faktiske)

16. november 2020

Sidste opdatering indsendt, der opfyldte kvalitetskontrolkriterier

12. november 2020

Sidst verificeret

1. november 2020

Mere information

Begreber relateret til denne undersøgelse

Nøgleord

Yderligere relevante MeSH-vilkår

Andre undersøgelses-id-numre

  • 546464

Disse oplysninger blev hentet direkte fra webstedet clinicaltrials.gov uden ændringer. Hvis du har nogen anmodninger om at ændre, fjerne eller opdatere dine undersøgelsesoplysninger, bedes du kontakte register@clinicaltrials.gov. Så snart en ændring er implementeret på clinicaltrials.gov, vil denne også blive opdateret automatisk på vores hjemmeside .

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Sponsorer og samarbejdspartnere

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Betingelser

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Narkotikainterventioner

Kosttilskud

Sponsor / samarbejdspartnere

Placeringer

Abonner