Urocortin, rat TFA is a neuropeptide and a potent endogenous CRFR agonist (Kis: 0.97 nM, 1.5 nM, and 13 nM for mouse CRF2β, rat CRF2α, and human CRF1).

CRF1 (human):ki： 13 nM , CRF2α (rat):1.5 nM (ki), CRF2β (mouse):0.97 nM (ki)

In stably transfected Chinese hamster ovary cells, Urocortin, rat induces cAMP generation with EC50 of 0.15 nM, 0.063 nM, and 0.087 nM for human CRF1, rat CRF2α, and mouse CRF2β, respectively [2].

Urocortin, rat (0.01 to 10 μg) decreases food intake in both food-deprived and non-deprived rats and such an effect also observed in mice after 1 μg of Urocortin, rat (i.c.v.). It has the potential of inducing anxiogenic behavior [3].