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  • Title: Studies on the postponed growth hormone secretion following the infusion of somatostatin.
    Author: Lucke C, Höffken B, Mühlen A.
    Journal: Acta Endocrinol (Copenh); 1976 Jul; 82(3):460-6. PubMed ID: 947121.
    Abstract:
    It is well known and also confirmed in this study that somatostatin (growth hormone inhibiting factor, GHIF) prevents the noctural GH secretion, as long as the peptide is infused. Following the infusion a rapid rise in GH levels is seen in sleeping subjects with peak values of 26.8 +/- 9.7 ng/ml compared to 31.7 +/- 4.7 ng/ml (+/- SEM) in control nights. Delayed GH peaks were seen even in the absence of slow wave sleep. No postponed GH rise was observed when subjects fell asleep again. These data demonstrate that the postponed nocturnal GH peak does not represent a rebound phenomenon to a previous trigger mechanism but is acutely sleep induced.
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