[D-Lys3]-GHRP-6

Amino Acid Sequence

His-Trp-Lys-Trp-Phe-Lys-NH2

General description

[D-Lys³]-GHRP6 (growth hormone releasing peptide 6) is a synthetic analog of the orexigenic peptide hormone called ghrelin.

Application

[D-Lys3]-GHRP-6 has been used:

• to study its role in incretin dysfunction and hyperglycemia in cystic fibrosis
• as an antagonist of growth hormone secretagogue receptor (GHS-R)
• as ghrelin receptor antagonist to study the dose-dependent effects of intraduodenal ghrelin on the glucose infusion rate (GIR) during pancreatic-euglycemic clamp procedure (PECs)

[D-Lys³]-GHRP6 has been used-

• to treat bovine somatotropes to determine the release of GH from treated cells and non-treated or control cells
• for intraperitoneal injection to groups of broiler chicken to determine the effect on feed intake, weight gain, and feed conversion ratio

Biochem/physiol Actions

[D-Lys3]-GHRP-6, a selective growth-hormone secretagogue receptor (GHSR) antagonist displays pro-autophagic effects on skeletal muscle. It can be used to study the dependency of GHSR-1a signalling mediated by acylated ghrelin.

[D-Lys³]-GHRP6 (growth hormone releasing peptide 6) induces the secretion of growth hormone (GH). In the membrane of clonal GC somatotropes, this peptide elevates the number of functional voltage-gated Ca²⁺ and Na⁺ channels. Chronic treatment with this peptide causes an elevation in Na+ macroscopic current in bovine pituitary somatotropes in culture, which results in an increase in the release of GH.