Activation of the neuropeptide S receptor (NPSR) system has been shown to produce anxiolytic-like actions, arousal, and enhance memory consolidation, whereas blockade of the NPSR has been shown to reduce relapse to substances of abuse and duration of anesthetics. We report here the discovery of a novel core scaffold (+) N-benzyl-3-(2-methylpropyl)-1-oxo-3-phenyl-1H,3H,4H,5H,6H,7H-furo[3,4-c]pyridine-5-carboxamide with potent NPSR antagonist activity in vitro. Pharmacokinetic parameters demonstrate that 14b reaches pharmacologically relevant levels in plasma and the brain following intraperitoneal (i.p.) administration, but is cleared rapidly from plasma. Compound 14b was able to block NPS (0.3 nmol)-stimulated locomotor activity in C57/Bl6 mice at 3 mg/kg (i.p.), indicating potent in vivo activity for the structural class. This suggests that 14b can serve as a useful tool for continued mapping of the pharmacological functions of the NPS receptor system.
激活神经肽S受体(NPSR)系统已被证明可以产生类似抗焦虑的作用、觉醒和提高记忆巩固,而阻断NPSR已被证明可以减少对滥用物质的复吸和麻醉剂的持续时间。我们在这里报告了一个新型核心支架(+)N-苄基-3-(2-甲基丙基)-1-氧代-3-苯基-1H,3H,4H,5H,6H,7H-呋喃[3,4-c]吡啶-5-甲酰胺的发现,该化合物在体外具有强大的NPSR拮抗活性。药代动力学参数表明,14b在腹腔注射(i.p.)后达到药理学相关水平,但会迅速从血浆中清除。化合物14b能够阻断C57/Bl6小鼠中由NPS(0.3纳米摩尔)刺激的移动活动,剂量为3毫克/千克(i.p.),表明该结构类别在体内具有强大的活性。这表明14b可以作为继续映射NPS受体系统药理功能的的有用工具。