申请人:THE SCRIPPS RESEARCH INSTITUTE
公开号:US10011598B2
公开(公告)日:2018-07-03
The invention provides a series of bioactive small molecules that target expanded r(CGG) repeats, termed r(CGG)exp, that causes Fragile X-associated Tremor Ataxia Syndrome (FXTAS). The compound was identified by using information on the chemotypes and RNA motifs that interact. Specifically, 9-hydroxy-5,11-dimethyl-2-(2-(piperidin-1-yl)ethyl)-6H-pyrido[4,3-b]carbazol-2-ium, binds the 5′CGG/3′GGC motifs in r(CGG)exp and disrupts a toxic r(CGG)exp-protein complex. Specifically, dimeric compounds incorporating two 9-hydroxyellipticine analog structures can even more potently bind the 5′CGG/3′GGC motifs in r(CGG)exp and disrupts a toxic r(CGG)exp-protein complex. Structure-activity relationships (SAR) studies determined that the alkylated pyridyl and phenolic side chains are important chemotypes that drive molecular recognition of r(CGG) repeats, such as r(CGG)exp. Importantly, the compound is efficacious in FXTAS model cellular systems as evidenced by its ability to improve FXTAS-associated pre-mRNA splicing defects and to reduce the size and number of r(CGG)exp-protein aggregates.
本发明提供了一系列针对导致脆性 X 相关震颤共济失调综合征(FXTAS)的扩展 r(CGG)重复序列(称为 r(CGG)exp)的生物活性小分子。该化合物是通过化学型和相互作用的 RNA 基团信息确定的。具体来说,9-羟基-5,11-二甲基-2-(2-(哌啶-1-基)乙基)-6H-吡啶并[4,3-b]咔唑-2-鎓能与 r(CGG)exp 中的 5′CGG/3′GGC 基序结合,并破坏有毒的 r(CGG)exp 蛋白复合物。具体来说,含有两个 9-羟基鞣花碱类似物结构的二聚化合物能更有效地结合 r(CGG)exp 中的 5′CGG/3′GGC 基序,并破坏具有毒性的 r(CGG)exp 蛋白复合物。结构-活性关系(SAR)研究确定,烷基化的吡啶基和酚类侧链是驱动分子识别 r(CGG)exp 等 r(CGG) 重复序列的重要化学型。重要的是,该化合物在 FXTAS 模型细胞系统中具有疗效,这体现在它能够改善 FXTAS 相关的前核糖核酸剪接缺陷,并减少 r(CGG)exp 蛋白聚集体的大小和数量。