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  • Title: Metabolic impact of growth hormone treatment in short children born small for gestational age.
    Author: Lebl J, Lebenthal Y, Kolouskova S, Steensberg A, Jøns K, Kappelgaard AM, Ibáñez L, Phillip M.
    Journal: Horm Res Paediatr; 2011; 76(4):254-61. PubMed ID: 21893941.
    Abstract:
    BACKGROUND: Growth hormone (GH) treatment in short children born small for gestational age (SGA) may result in metabolic changes with potential long-term effects. METHODS: 149 short SGA children (mean birth weight 2.0 ± 0.6 kg, age 5.5 ± 1.5 years, height standard deviation score (SDS) -3.1 ± 0.6) were randomised to: low-dose GH therapy (0.033 mg/kg/day) for 2 years; high-dose GH therapy (0.100 mg/kg/day) for 1 year, or mid-dose GH therapy (0.067 mg/kg/day) for 1 year. Leptin, ghrelin, insulin-like growth factor-I (IGF-I), IGF binding protein-1 (IGFBP-1), lipids, fasting blood glucose and fasting insulin were assessed at baseline, 12 and 24 months. RESULTS: After 1 year of active treatment, GH significantly reduced serum ghrelin and increased IGF-I SDS and insulin levels. Regression analysis showed an inverse correlation between ghrelin and IGF-I SDS (p < 0.001). Leptin and IGFBP-1 also declined (both p < 0.05). Changes in insulin levels reversed upon discontinuation. Improvements in lipid profile were nonsignificant and fasting blood glucose levels remained within the normal range. CONCLUSION: In short SGA children, ghrelin and leptin reductions associated with GH treatment may occur through a negative feedback loop of the GH-IGF-I axis. Consequently, via ghrelin and leptin suppression, GH treatment may modify food intake and body composition and potentially improve long-term metabolic outcomes.
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