Effect of Oxyntomodulin, Glucagon, GLP-1, and Combined Glucagon +GLP-1 Infusion on Food Intake, Appetite, and Resting Energy Expenditure

Jonatan Ising Bagger, Jens Juul Holst, Bolette Hartmann, Birgitte Andersen, Filip Krag Knop, Tina Vilsbøll

    75 Citationer (Scopus)

    Abstract

    CONTEXT: The gut hormone, oxyntomodulin, is a proglucagon product with body weight-lowering potential. It binds to both the glucagon-like peptide-1 (GLP-1) receptor and the glucagon receptor; however, the mechanism behind the body weight-lowering effect remains elusive.

    OBJECTIVE: We wanted to delineate the contributions of separate and combined GLP-1 receptor and glucagon receptor activation to the body weight-reducing mechanisms of oxyntomodulin.

    DESIGN: This was a double-blinded, randomized, crossover study.

    SETTING: The study was conducted at a specialized research unit.

    PARTICIPANTS: Fifteen young healthy male volunteers (aged 22 [range 18-32] y; body mass index 23 [21-26] kg/m(2); fasting plasma glucose 5.1 [4.4-5.4] mmol/L; and glycated hemoglobin A1c 40 (37-42) mmol/mol).

    INTERVENTIONS: Five 4-hour liquid meal tests during the infusion of saline, GLP-1 (1 pmol × kg(-1) × min(-1)), glucagon (0.86 pmol × kg(-1) × min(-1)), oxyntomodulin (3 pmol × kg(-1) × min(-1)), or glucagon+GLP-1 (same doses).

    MAIN OUTCOME MEASURES: We evaluated resting energy expenditure (measured as oxygen uptake, gastric emptying (GE), composite appetite scores (CAS), and food intake.

    RESULTS: Oxyntomodulin, GLP-1, and GLP-1+glucagon slowed GE and reduced CAS, whereas glucagon did not affect GE and CAS. All infusions caused a similar decrease in food intake compared with saline (total intake (g [95% confidence interval]), saline 811 [729, 892], GLP-1 669 [586, 750], glucagon 686 [604, 768], oxyntomodulin 689 [608, 771], and glucagon+GLP-1 688 [606, 769]). Oxygen uptake did not change significantly from baseline in response to any peptide infusion compared with saline.

    CONCLUSIONS: Oxyntomodulin, GLP-1, and glucagon decreased food intake but with no additional effect of combining GLP-1 and glucagon.

    OriginalsprogEngelsk
    TidsskriftThe Journal of clinical endocrinology and metabolism
    Vol/bind100
    Udgave nummer12
    Sider (fra-til)4541-52
    Antal sider12
    ISSN0021-972X
    DOI
    StatusUdgivet - dec. 2015

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