Antisauvagine-30 TFA (aSvg-30 TFA) is a highly selective and competitive antagonist of CRF2 receptor peptidic. It shows a Kd of 1.4 nM and 150 nM for mCRFR2β and CRFR1, respectively.

CRFR2β (mouse):(kd)1.4 nM , CRFR1:150 nM (kd)

Antisauvagine-30 prevents stress-enhanced fear conditioning and Mek-1/2-dependent activation of Erk-1/2 and p90Rsk-1. It did not affect the phosphorylation of the PKA regulatory subunit II of stressed mice [1][2].

Antisauvagine-30 (i.h. 400 ng/0.5 μl per mouse) selectively prevents the stress-induced enhancement of fear conditioning without affecting the fear conditioning of nonstressed mice[2]. Antisauvagine-30 injected i.c.v. elicits a significant anxiogenic effect [3].