Resumen de Growth Hormone and Obesity

Astrid Hjelholt, Morten Høgild, Ann Mosegaard Bak, Mai Christiansen Arlien Søborg, Amanda Bæk, Niels Jessen, Bjørn Richelsen, Steen Bønløkke Pedersen, Niels Møller, Jens Otto Lunde Jørgensen

• Growth hormone (GH) exerts IGF-I dependent protein anabolic and direct lipolytic effects. Obesity reversibly suppresses GH secretion driven by elevated FFA levels, whereas serum IGF-I levels remain normal or elevated due to elevated portal insulin levels. Fasting in lean individuals suppresses hepatic IGF-I production and increases pituitary GH release, but this pattern is less pronounced in obesity. Fasting in obesity is associated with increased sensitivity to the insulin-antagonistic effects of GH. GH treatment in obesity induces a moderate reduction in fat mass and an increase in lean body mass but the therapeutic potential is uncertain.