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Omics Profiling of the Response to Food and Variability of Weight Loss With Bariatric Surgery (NCT02757638)

Understanding how foods and nutrients are digested, absorbed and metabolized when weight is stable and during weight loss induced by bariatric surgery procedure using the technologies of genomics, transcriptomics, proteomics, metabolomics and fluxomics ("omics") will enable generation of new hypotheses that could explain the inter-individual differences in weight loss and could lead to optimization and individualization of therapies designed to lose weight.
  • Other: Stable isotope infusion
    such as glycerol, D2O, tyrosine, phenylalanine, glucose, arginine, and citrulline
    Ages eligible for Study
    18 Years and older
    Genders eligible for Study
    All
    Accepts Healthy Volunteers
    Accepts Healthy Volunteers
    The overarching hypothesis is that there are baseline, pre- and post-surgery combinations of 'omics' signatures in response to food and nutrients that explain the weight loss response of obese subjects to the pre-operative very low calorie (VLC) diet and to bariatric surgery.

    In order to address the general hypothesis the following specific aims will be addressed:

    Specific Aim 1: To test the hypothesis that there is a combination of 'omics' parameters in response to a defined meal that discriminate between morbidly obese subjects and normal weight subjects.

    Specific Aim 2: To test the hypothesis that variation in % weight loss to the VLC diet prior to bariatric surgery is related to baseline genomic markers, gene expression profile, proteomic and metabolomic signatures as well as baseline metabolic and substrates fluxomics response to a defined meal.

    Specific Aim 2: To test the hypothesis that variation in % weight loss 3 months after bariatric surgery is related to baseline genomic markers, gene expression profile, proteomic and metabolomic signatures as well as baseline metabolic and substrates fluxomics response to a defined meal.

    Specific Aim 3: To test whether there are "omics" characteristics post-surgery that track with variability in weight loss at 3 months.

    The benefit of these experiments will be the knowledge gained from understanding the variation in % weight loss to the medically required VLC diet prior to bariatric surgery, and to bariatric surgery, in relation to baseline genomic markers, gene expression profile, proteomic and metabolomic signatures as well as baseline metabolic and substrates fluxomics response to a defined meal in obese and healthy adults.

    1 locations

    United States (1)
    • Texas A&M University-CTRAL
      recruiting
      College Station, Texas, United States, 77843
    Status:
    recruiting
    Type:
    Interventional
    Phase:
    -
    Start:
    30 September, 2015
    Updated:
    26 October, 2017
    Participants:
    50
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