Endogenous central calcitonin (CT) receptor agonist that stimulates cAMP formation at a potency 350-fold greater than CT (ED50 values are 0.2 and 71 nM respectively). Displays no activity at calcitonin-gene related peptide (CGRP) and adrenomedullin receptors. Inhibits formation of multinuclear osteoclasts with similar efficacy to CT in vitro. Suppresses food intake and increases body temperature in free-feeding rats, and significantly decreases plasma calcium levels in vivo.

6,8-dihydroxy -1,2,7- trimethoxy -3- methylanthraquinone

Urocortin III (human) is a corticotropin-releasing factor (CRF)-related peptide. Urocortin III (human) preferentially binds and activates CRF-R2 and has a discrete central nervous system and peripheral distribution. Urocortin III (human) selectively binds to type 2 CRF receptors with Ki values of 13.5, 21.7, and >100 nM for mCRF2β, rCRF2α, and hCRF1, respectively. Urocortin III (human) mediates somatostatin-dependent negative feedback control of Insulin (human) secretion.