申请人:The Regents of the University of California
公开号:US20040229898A1
公开(公告)日:2004-11-18
The invention is drawn to compositions and methods for inhibiting and treating malformed forms of proteins causing neurodegenerative disease, such as protease resistant prion proteins (PrP
Sc
) and those associated with transmissible spongiform encephalopathies (TSEs). Bis-acridines are characterized by a dimeric motif, comprising two acridine heterocycles tethered by a linker. A library of bis-(6-chloro-2-methoxy-acridin-9-yl) and bis-(7-chloro-2-methoxy-benzo[b][1,5]naphthyridin-10-yl) analogs were synthesized to explore the effect of structurally diverse linkers on PrP
Sc
replication in ScN2a cells. Structure-activity analysis revealed that linker length and structure effect inhibition of prion replication in cultured, scrapied cells. Three bis-acridine analogs, (6-chloro-2-methoxy-acridin-9-yl)-(3-{4-[3-(6-chloro-2-methoxy-acridin-9-ylamino)-propyl]-piperazin-1-yl}-propyl)-amine, N,N′-bis-(6-chloro-2-methoxy-acridin-9-yl)-1,8-diamino-3,6-dioxaoctane, and (1-{[4-(6-chloro-2-methoxy-acridin-9-ylamino)-butyl]-[3-(6-chloro-2-methoxy-acridin-9-ylamino)-propyl]-carbamoyl}-ethyl)-carbamic acid tert-butyl ester, showed half-maximal inhibition of PrP
Sc
formation at effective concentrations (EC
50
) of 40 nM, 25 nM and 30 nM, respectively, and were not cytotoxic for uninfected neuroblastoma cells at concentrations of 500 nM. The data produced here shows that bis-acridine analogs prevent or slow PrP
Sc
replication.
本发明涉及用于抑制和治疗导致神经退行性疾病的畸形形式蛋白质的组合物和方法,例如抗蛋白酶朊病毒蛋白(PrP
Sc
)以及与传染性海绵状脑病(TSE)相关的蛋白。双吖啶的特点是具有二聚体结构,由两个吖啶杂环通过连接体拴在一起。我们合成了双(6-氯-2-甲氧基-吖啶-9-基)和双(7-氯-2-甲氧基-苯并[b][1,5]萘啶-10-基)类似物库,以探讨结构不同的连接体对 PrP
Sc
在 ScN2a 细胞中复制的影响。结构-活性分析表明,连接体的长度和结构对朊病毒在培养的刮伤细胞中的复制有抑制作用。三种双吖啶类似物:(6-氯-2-甲氧基-吖啶-9-基)-(3-{4-[3-(6-氯-2-甲氧基-吖啶-9-基氨基)-丙基]-哌嗪-1-基}-丙基)-胺、N,N′-双-(6-氯-2-甲氧基-吖啶-9-基)-1,8-二氨基-3,6-二氧杂辛烷和(1-{N′-双-(6-氯-2-甲氧基-吖啶-9-基)-1,8-二氨基-3,6-二氧杂辛烷和 (1-氨基甲酰基}-乙基)-氨基甲酸叔丁酯对 PrP
Sc
形成的有效浓度(EC
50
分别为 40 nM、25 nM 和 30 nM,对未感染的神经母细胞瘤细胞无细胞毒性。这里的数据表明,双吖啶类似物能阻止或减缓 PrP
Sc
复制。