| Bioactivity | R121919 (NBI30775) is a potent small-molecule CRF1 receptor antagonist with a Ki of 2 to 5 nM for the CRF1 receptor and over 1000-fold weaker activity at the CRF2 receptor, CRF-binding protein, or 70 other receptor types[1]. | ||||||||||||
| Target | Ki: 2 to 5 nM (CRF1) | ||||||||||||
| Invitro | R121919 is a potent small-molecule CRF1 receptor antagonistwith high affinity for the CRF1 receptor (Ki=2–5 nM) and over 1000-fold weaker activity at the CRF2 receptor, CRF-binding protein, or 70 other receptor types[1]. | ||||||||||||
| In Vivo | R121919 dose dependently decreases adrenocorticopin hormone and corticosterone responses to restraint stress in rats. Peak plasma adrenocorticopin hormone and corticosterone concentrations at a dose of 10 mg/kg R121919 are 9 and 25%, respectively[1]. R121919 reduces levels of anxiety in mice with a steep dose-response curve. Molecules such as GR, MR, BAG-1 and AP-1 have been identified as some of the drug's intracellular targets[2]. | ||||||||||||
| Name | R121919 | ||||||||||||
| CAS | 195055-03-9 | ||||||||||||
| Formula | C22H32N6 | ||||||||||||
| Molar Mass | 380.53 | ||||||||||||
| Appearance | Solid | ||||||||||||
| Transport | Room temperature in continental US; may vary elsewhere. | ||||||||||||
| Storage |
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| Reference | [1]. Gutman DA, et al. The corticotropin-releasing factor1 receptor antagonist R121919 attenuates the behavioral and endocrine responses to stress. J Pharmacol Exp Ther. 2003 Feb;304(2):874-80. [2]. Post A, et al. Identification of molecules potentially involved in mediating the in vivo actions of the corticotropin-releasing hormone receptor 1 antagonist, NBI30775 (R121919). Psychopharmacology (Berl). 2005 Jun;180(1):150-8. |