The response of obese subjects to continuous infusion of human pancreatic growth hormone-releasing factor 1-44.
The growth hormone (GH) response of seven obese subjects to a 4 h continuous infusion of human pancreatic GH-releasing factor, 0.3 micrograms/kg/h, has been compared with that obtained in seven sex and age matched controls. The pattern of response was normal in the obese but peak GH levels (mean +/- SEM: 13.8 +/- 1.9 compared to 30.9 +/- 4.7 mU/l, P less than 0.01) and integrated GH levels (mean +/- SEM: 27.1 +/- 3.6 compared to 62.0 +/- 9.7 mU/l/h, P less than 0.01) were reduced in obese subjects. There was a negative correlation between the integrated GH response and the percentage ideal body weight (r = -0.80, P less than 0.05), but no significant correlation with somatomedin-C levels (r = +0.72; P = 0.07). Obese subjects have an impaired GH response to infusion of GH-releasing factor which is not related to negative feedback by somatomedins.
D000328:Adult; D005260:Female; D013006:Growth Hormone / Q000097:blood / Q000378:metabolism*; D013007:Growth Hormone-Releasing Hormone / Q000494:pharmacology*; D006801:Humans; D007334:Insulin-Like Growth Factor I / Q000097:blood; D008297:Male; D008875:Middle Aged; D009765:Obesity / Q000097:blood / Q000503:physiopathology*; D010446:Peptide Fragments / Q000494:pharmacology*
D010446:Peptide Fragments; D007334:Insulin-Like Growth Factor I; D013006:Growth Hormone; D013007:Growth Hormone-Releasing Hormone