Hexarelin

Hexarelin is a synthetic hexapeptide growth hormone secretagogue and ghrelin receptor (GHS-R1a) agonist used in experimental models to study somatotropic and cardiovascular peptide signaling. In preclinical research, Hexarelin activates Gq/PLC-dependent calcium signaling pathways involved in growth hormone release while also engaging cardioprotective and metabolic mechanisms independent of GH secretion. Experimental studies have investigated its role in myocardial protection during ischemic stress, skeletal muscle preservation, and lipid metabolism regulation through peptide-mediated endocrine and paracrine signaling pathways. Hexarelin is utilized as a research tool in studies of cardiac peptide pharmacology, muscle metabolism, and ghrelin receptor biology.