Send to

Choose Destination
See comment in PubMed Commons below
Exp Clin Endocrinol Diabetes. 2002 Oct;110(7):343-7.

Growth hormone secretagogue (GHS) analogue, hexarelin stimulates GH from peripheral lymphocytes.

Author information

Institute of animal science, 31535 Neustadt, Germany.


The role of growth hormone releasing hormone (GHRH) and growth hormone releasing peptide-6 (GHRP-6) analogue hexarelin was investigated in the regulation of GH production from lymphocytes. Porcine and bovine blood mononuclear cells were separated using density gradient centrifugation method by layering the whole blood or buffy coat cells on lymphodex. Cells were incubated for 3 or 5 days with or without phytohemagglutinin (PHA-M), GHRH, GHRP-6 analogue hexarelin, somatostatin or GHRH + hexarelin. Growth hormone was fractionated from supernatants by gel chromatography and further concentrated by lyophilization at - 20 degrees C. A nearly two fold increase in basal secretion of GH (porcine: 3.5 +/- 0.1 ng/ml, bovine: 3.2 +/- 0.2 ng/ml) was achieved by GHRH and hexarelin at concentrations of 0.1, 1.0, 10 and 100 nM in both porcine and bovine cells. Lymphocytic GH release was also stimulated in response to PHA-M (10 micro g/well). Neither a dose dependent nor a synergistic nor an additive effect was apparent on GH secretion from lymphocytes. GHRH stimulated lymphocytic GH secretion, whereas, somatostatin had no effect. This study reports for the first time that hexarelin stimulates the secretion of GH from peripheral lymphocytes.

[Indexed for MEDLINE]
PubMed Commons home

PubMed Commons

How to join PubMed Commons

    Supplemental Content

    Full text links

    Icon for Georg Thieme Verlag Stuttgart, New York
    Loading ...
    Support Center