Disulfide Cyclized Tripeptide Analogues of Angiotensin IV as Potent and Selective Inhibitors of Insulin-Regulated Aminopeptidase (IRAP)
作者:Hanna Andersson、Heidi Demaegdt、Georges Vauquelin、Gunnar Lindeberg、Anders Karlén、Mathias Hallberg、Máté Erdélyi、Anders Hallberg
DOI:10.1021/jm100793t
日期:2010.11.25
The insulin-regulated aminopeptidase (IRAP) localized in areas of the brain associated with memory and learning is emerging as a new promising therapeutic target for the treatment of memory dysfunctions. The angiotensin II metabolite angiotensin IV (Ang IV, Val1-Tyr2-Ile3-His4-Pro5-Phe6) binds with high affinity to IRAP and inhibits this aminopeptidase (Ki = 62.4 nM). Furthermore, Ang IV has been demonstrated
胰岛素调节的氨基肽酶(IRAP)位于与记忆和学习有关的大脑区域,正在成为治疗记忆功能障碍的一种新的有希望的治疗靶标。血管紧张素II代谢产物血管紧张素IV(Ang IV,Val 1 -Tyr 2 -Ile 3 -His 4 -Pro 5 -Phe 6)与IRAP具有高亲和力并抑制该氨基肽酶(K i = 62.4 nM)。此外,已证实Ang IV可增强动物模型中的认知,并被认为在认知过程中起重要作用。本文报道C端三肽His 4 -Pro 5 -Phe的置换具有苯基乙酸官能度并在N-末端具有约束的大环系统的图6的化合物提供了有效的IRAP抑制剂,其特征上比六肽Ang IV具有更少的肽。使用溶液NMR光谱法,蒙特卡洛构象搜索和NAMFIS计算的组合对三对非对映异构体Ang IV类似物进行构型分析。包围该化合物升-氨基仅酸(4,8,和12相比,他们的)显示出较高的显著生物活性LLD差向异构体(5,9