5-HT 1A Receptor 2.3 nM (IC 50 ) sigma 1 47 nM (IC 50 ) sigma 2 56 nM (IC 50 )

OPC-14523 free base (0.3-100 mg/kg; p.o.; daily for 0, 2, 4, 7 days) produces a marked antidepressant-like effect in the forced swimming test (FST) with rats and mice without affecting the general locomotor activity. Animal Model: Wistar strain of rats (140-245 g) Dosage: 0.3-100 mg/kg Administration: P.o.; daily for 0, 2, 4, 7 days Result: A single doses of 1 mg/kg and higher of OPC-14523 reduced immobility time in the FST with an ED 50 value of 27 mg/kg. The ED 50 value for OPC-14523 on day 7 was 18 mg/kg. Animal Model: ICR strain of mice (25-45 g) Dosage: 0.3-100 mg/kg Administration: P.o.; daily for 0, 2, 4, 7 days Result: A single oral dose of OPC-14523 produced a marked reduction in immobility time during the FST at oral doses of 1 mg/kg and higher, with an ED 50 value of 20 mg/kg. The potency of OPC-14523 in decreasing immobility time was greater after treatment for seven consecutive days, producing an ED50 value of 2 mg/kg.

OPC-14523 free base 是一种具有口服活性的 sigma 和 5-HT1A 受体激动剂，对 sigma 受体 (σ1/2 IC50=47/56 nM)、5-HT1A 受体 (IC50=2.3 nM) 和 5-HT 转运体 (IC50=80 nM) 具有高度亲和力。OPC-14523 free base 显示抗抑郁药样活性。