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- W2149661241 abstract "OBJECTIVE: Modest elevations in circulating IGF-I levels have been suggested to protect against the development of glucose intolerance in insulin-resistant subjects. To further understand the interactions of GH and IGF-I on beta-cell function and post-load glucose tolerance in glucose-intolerant subjects predisposed to diabetes, we performed a pilot study in 12 subjects with impaired glucose tolerance and the metabolic syndrome using a low GH dose (1.7 microg/kg per day) known to increase endogenous IGF-I production. DESIGN: Fourteen daily GH or placebo injections in a double-blind cross-over study. METHODS: Baseline and post-treatment oral glucose tolerance tests were performed. The homeostasis model assessment and the insulinogenic index was used to estimate fasting insulin sensitivity (S(I)) and beta-cell function respectively, whereas changes in the incremental area under the curve were used to estimate post-load glucose tolerance (DeltaAUC(glu)) and post-load insulin levels (DeltaAUC(ins)). RESULTS: GH increased total IGF-I (P<0.02), free IGF-I (P<0.04) and fasting insulin (P<0.04) levels, but did not modify plasma IGF-binding proteins (IGFBPs)-1 and -3, fasting glucose, non-esterified fatty acid and C-peptide levels, and fasting S(I). After oral glucose intake, glucose tolerance improved (P<0.03), but post-load insulin levels and beta-cell function remained unchanged. CONCLUSION: Short-term low-dose GH administration induced fasting hyperinsulinaemia possibly by reducing insulin clearance but improved post-load glucose tolerance, suggesting that increased bioavailable IGF-I enhanced post-load S(I) without altering beta-cell function. Longer-term studies are required to ascertain whether these positive effects on post-load glucose tolerance and the preservation of beta-cell function can be sustained by this GH dose in these high-risk subjects." @default.
- W2149661241 created "2016-06-24" @default.
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- W2149661241 date "2004-07-01" @default.
- W2149661241 modified "2023-10-11" @default.
- W2149661241 title "Short-term low-dose growth hormone administration in subjects with impaired glucose tolerance and the metabolic syndrome: effects on beta-cell function and post-load glucose tolerance" @default.
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- W2149661241 doi "https://doi.org/10.1530/eje.0.1510039" @default.
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