AA92593 is an opsin 4 (OPN4) receptor antagonist (Ki = 16 nM).1 It inhibits light-induced calcium transients in CHO cells expressing human OPN4 (IC50 = 665 nM). AA92593 (10 ?M) reverses light-induced calcium influx in rat intrinsically photosensitive retinal ganglion cells (ipRGCs). In vivo, AA92593 (30 mg/kg) reduces light-induced pupil constriction in mice.
1.Jones, K.A., Hatori, M., Mure, L.S., et al.Small-molecule antagonists of melanopsin-mediated phototransductionNat. Chem. Biol.9(10)630-635(2013)
















