GHRP-2 (Pralmorelin)
Growth Hormone Research
Comprehensive scientific reference for GHRP-2 (Pralmorelin) — covering mechanism of action, peer-reviewed research studies with citations, UK laboratory supplier locations, and keyword resources for research compound procurement.
Mechanism of Action
GHRP-2 (Growth Hormone Releasing Peptide-2, also known as Pralmorelin) is a synthetic hexapeptide (D-Ala-D-betaNal-Ala-Trp-D-Phe-Lys-NH2) that acts as a potent agonist of the ghrelin receptor (GHS-R1a, growth hormone secretagogue receptor). The ghrelin receptor is a class A G protein-coupled receptor expressed on pituitary somatotropes and in hypothalamic neurons. Upon binding GHS-R1a, GHRP-2 activates Galphaq/PLCbeta signalling, producing inositol triphosphate (IP3) and diacylglycerol (DAG), which mobilise intracellular calcium and activate protein kinase C (PKC) — a signalling cascade distinct from the Galphas/cAMP/PKA pathway activated by GHRH. This distinct pathway enables GHRP-2 to stimulate GH release through a mechanism complementary to GHRH, and the two pathways produce synergistic GH release when combined. Beyond GH release, GHRP-2's ghrelin receptor agonism produces additional effects: ghrelin is the 'hunger hormone' and GHRP-2 stimulates appetite through hypothalamic ghrelin receptor activation. The peptide also modulates energy homeostasis signalling and may influence sleep architecture through central ghrelin receptor activity. GHRP-2 is studied alongside GHRH analogues (such as CJC-1295 or sermorelin) for combined GHRH-ghrelin receptor pathway research.
Research Studies & Citations
GHRP-2: Ghrelin Receptor Agonism and GH Release
2004Bowers CY et al. · Journal of Clinical Endocrinology & Metabolism
Study characterising GHRP-2's GHS-R1a agonism and its effects on GH release through the PLC/IP3 signalling pathway.
Ghrelin Receptor Signalling in GH Secretion
2005Kojima M et al. · Nature Reviews Neuroscience
Review of ghrelin receptor (GHS-R1a) signalling mechanisms and its role in GH release and appetite regulation.
Combined GHRH and GHRP Signalling in GH Release
2010Arvat E et al. · Clinical Endocrinology
Study demonstrating the synergistic GH-release effects of combined GHRH and ghrelin receptor agonism.
These citations are provided for research reference purposes only. HPLC Peps supplies GHRP-2 (Pralmorelin) strictly for laboratory research use. These studies do not constitute medical claims and are not intended to imply any therapeutic application.
UK Supplier Coverage
Ghrelin receptor pharmacology research at the University of Sheffield and the University of Liverpool source GHRP-2 from HPLC Peps for GHS-R1a signalling studies, choosing HPLC verified peptides UK for reproducible calcium mobilisation assay data. From Reading's endocrine research groups to York's appetite signalling laboratories, researchers buy peptides UK from HPLC Peps as their peptide supplier UK because our highest purity peptides carry published COAs confirming 99%+ purity.
Research Keywords
Buy GHRP-2 (Pralmorelin) UK
Ghrelin receptor agonist (GHS) — 20mg lyophilised research peptide. Lab-verified, 99%+ purity. Best UK peptides. Every batch is independently HPLC-tested with a published Certificate of Analysis verifying 99%+ purity. For professional laboratory research only.
Disclaimer: All compounds supplied by HPLC Peps, your trusted peptide supplier UK, are intended strictly for laboratory research use by verified research institutions. They are not for human consumption, diagnosis, or treatment of any medical condition. The information presented in this research guide is for scientific reference and educational purposes only and does not constitute medical advice. Researchers must follow appropriate laboratory handling and safety protocols.