Astressin is an amino-terminal truncated analog of CRF that retains high affinity binding to the extracellular domain of the receptor and is believed to act as a neutral competitive antagonist of receptor activation.
Potent and selective corticotropin-releasing factor receptor 2 (CRF2) antagonist (IC50 values are 1.3 and > 500 nM for CRF2 and CRF1 respectively). Antagonizes CRF2-mediated inhibition of gastric emptying.
Corticotropin-releasing factor (CRF) receptor agonist. Ki values are 9.4, 9.9, and 3.8 nM for inhibition of 125I-[D-Tyr1]astressin binding to hCRF-R1, rCRF-R2a and mCRF-R2b respectively.