RB 101 suppresses enkephalinase and aminopeptidases; biologically cleaved at disulfide to produce inhibitors of both aminopeptidase N and neutral endopeptidase.
S 17092 (S 17092-1)是一种高效、可逆且具有口服活性的脑脯氨酰内肽酶(PEP)小分子抑制剂,其对重组人PEP的抑制常数(Ki)为1.5 nM,IC50为1.2 nM。S 17092通过减缓P物质(Substance P)、促甲状腺激素释放激素(TRH)和精氨酸加压素(AVP)等多种神经活性肽的降解,提高脑内这些肽类物质的水平,在多种啮齿类和灵长类动物模型中改善与年龄相关或药物诱导的记忆与认知功能障碍。S 17092曾用于阿尔茨海默病及认知障碍相关研究,以评估PEP调控在神经功能中的作用。
JTP-4819 is a potent and selective prolyl endopeptidase (PEP) inhibitor with potential for treating Alzheimer's disease. At nanomolar concentration, JTP-4819 inhibited the degradation of substance P, arginine-vasopressin, and thyrotropin-releasing hormone by PEP in supernatants of the rat cerebral cortex and hippocampus. Repeated administration of JTP-4819 reversed the aging-induced decrease in brain substance P-like and thyrotropin-releasing hormone-like immunoreactivity, suggesting that this drug may be able to improve the imbalance of peptidergic neuronal systems that develops with senescense by inhibiting PEP activity. JTP-4819 increased acetylcholine release from the frontal cortex and hippocampus, regions closely associated with memory, in both young and aged rats.