Amylin (8-37), human, derived from humanAmylin, possesses direct vasodilator effects in isolated mesenteric resistance arteries of rats. HumanAmylin is a small pancreatic β-cell hormone that forms aggregates in the absence of insulin and is a key pathological feature of type II diabetes mellitus.
Amylin, a 37-amino acid polypeptide that is structurally related to calcitonin, is secreted from the B cells of the pancreas. Amylin has anoretic effects in rats. Amylin may be responsible for the etiology of insulin resistance of type II diabetes mellitu
Tyr-α-CGRP is an N-terminal extended tyrosinated analogue of α-calcitonin gene-related peptide . It binds to amylin receptors AMY1 and AMY3 in COS-7 cells expressing the human receptors (IC50s = 141 and 1.86 nM, respectively). Tyr-α-CGRP also binds to and stimulates cAMP accumulation in rat L6 myocytes (IC50 = 4 nM; EC50 = 12 nM). It also binds to rat brain and spleen membrane preparations (IC50s = 0.2 and 0.5 nM, respectively), induces positive chronotropic and inotropic effects in isolated right and left guinea pig atria (EC50s = 282 and 74 nM, respectively), and inhibits the twitch response in rat vas deferens (EC50 = 1.9 nM).