Oct 1, 1989

The effects of galanin on growth hormone secretion in children of normal and short stature

Pediatric Research
S LocheE E Müller

Abstract

We have evaluated the effect of galanin (Gal), a newly identified hypothalamic peptide, on growth hormone (GH) secretion in 10 children with normal stature (NS), nine with constitutional growth delay (CGD), and five with isolated GH deficiency (IGHD). Gal was infused intravenously at a rate of 8 or 15 micrograms/kg/h. All children also underwent an acute oral clonidine test (0.15 mg/m2). In CGD children the mean plasma GH peak after 8 micrograms/kg/h of Gal infusion (13.3 +/- 1.7 ng/mL; mean +/- SEM) was higher (p less than 0.02) than in NS children (8.5 +/- 0.8 ng/mL). When the dose of Gal was increased to 15 micrograms/kg/h the mean plasma GH peak in CGD children (18.5 +/- 3.5 ng/mL) was still higher than in the NS group (13.2 +/- 2.9 ng/mL), although not significantly so. In IGHD children the mean plasma GH peak elicited by 8 or 15 micrograms/kg/h of Gal (3.8 +/- 0.7 and 3.9 +/- 0.5 ng/mL, respectively) was lower than that obtained in either CGD (p less than 0.0002) or NS children (p less than 0.001). In NS children the mean plasma GH peak after acute clonidine administration (22.3 +/- 3.0 ng/mL) was higher than that observed after either dose of Gal used (p less than 0.001 and p less than 0.05 with 8 and 15 micrograms/kg/h,...Continue Reading

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Mentioned in this Paper

Growth Hormone Activity
Metaphyseal Chondrodysplasia With Cone-shaped Epiphyses, Normal Hair, and Normal Hands
Process of Secretion
GAL gene
IGHD gene
Growth Hormone Secretion
Human Pancreatic Growth Hormone-Releasing Factor
Shox Gene With Short Stature
Growth Hormone Measurement
Polypeptides

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