Compound class and structure tesamorelin is a synthetic 44-amino-acid analogue of human growth hormone releasing hormone ghrh , supplied as a lyophilized white powder in sealed vials for laboratory research use only. The sequence corresponds to full-length ghrh 1 44 , with a trans-3-hexenoyl group attached at the n-terminal tyrosine. This acyl modification sterically shields the n-terminus from dipeptidyl peptidase-4 dpp-4 cleavage the principal enzymatic route that fragments native ghrh in plasma and serum-containing culture media so the intact molecule persists across longer assay windows than the unmodified parent sequence. Receptor pharmacology and signalling the molecular target is the ghrh receptor ghrhr , a class b1 secretin-family g protein-coupled receptor expressed densely on anterior pituitary somatotrophs. Agonist occupancy drives gs coupling, adenylyl cyclase activation and cyclic amp accumulation, with downstream protein kinase a activity, creb phosphorylation and gh1 transcriptional readouts, alongside voltage-gated calcium entry that supports secretory granule release. Released growth hormone then engages hepatic and peripheral growth hormone receptors, activating jak2 stat5 signalling and igf-1 and igfbp-3 expression. Because somatostatinergic tone and igf-1 feedback shape the same circuit, the analogue is widely used as a probe of feedback architecture rather than of a single receptor in isolation. Research areas, models and endpoints in vitro work uses ...
Brand: Real Peptides